SUNAMERICA INCOME FUNDS
485BPOS, 1998-07-24
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<PAGE>
 
            
As filed with the Securities and Exchange Commission on July 27, 1998     

                                                     File Nos. 33-6502; 811-4708

- --------------------------------------------------------------------------------

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549



                                   FORM N-1A



                  REGISTRATION STATEMENT UNDER THE SECURITIES
                                  ACT OF 1933

                      Pre-Effective Amendment No.      
                                                        ---
                                                 
                    Post-Effective Amendment No. 24      X       
                                                        ---



                                    and/or

                  REGISTRATION STATEMENT UNDER THE INVESTMENT
                                    COMPANY

                                  ACT OF 1940
                                                        ---
                                                                    
                                Amendment No. 21         X       
                                                        ---
                       (Check appropriate box or boxes)


                            SUNAMERICA INCOME FUNDS
              (Exact Name of Registrant as Specified in Charter)



                             The SunAmerica Center
                        733 Third Avenue - Third Floor
                           New York, NY  10017-3204
               (Address of Principal Executive Office)(Zip Code)


      Registrant's telephone number, including area code: (800) 858-8850


                                     
                                Robert M. Zakem      
                   Senior Vice President and General Counsel
                       SunAmerica Asset Management Corp.
                             The SunAmerica Center
                         733 Third Avenue, Third Floor
                           New York, NY  10017-3204
                    (Name and Address of Agent for Service)

                                   Copy to:

                            Margery K. Neale, Esq.
                      
                  Shereff, Friedman, Hoffman & Goodman, LLP      
                               919 Third Avenue
                              New York, NY  10022


 It is proposed that the filing will become effective (check appropriate box)
         
 X   immediately upon filing pursuant          on [date] pursuant
- ---                                       ---
     to paragraph (b)                          to paragraph (b)

     60 days after filing pursuant             on [date] pursuant to 
- ---                                       ---
     to paragraph (a)                          paragraph (a) of Rule 485      

                           -------------------------
<PAGE>
 
                            SUNAMERICA INCOME FUNDS
                             CROSS REFERENCE SHEET
                            Pursuant to Rule 481(a)
                        Under the Securities Act of 1933
                        --------------------------------


 
  PART A
 Item No.   Registration Statement Caption         Caption in Prospectus
- ----------  -------------------------------  ---------------------------------

    1       Cover Page                       Cover Page
 
    2       Synopsis                         Summary of Fund Expenses
 
    3       Condensed Financial Information  Financial Highlights; Performance
                                             Data

    4       General Description of           Investment Objectives and
            Registrant                       Policies; Investment Techniques
                                             and Risk Factors; Investment
                                             Restrictions; General Information

    5       Management of the Fund           Management of the Trust; Portfolio
                                             Transactions and Brokerage and
                                             Turnover

    5A      Management's Discussion of Fund  *
            Performance

    6       Capital Stock and Other          Dividends, Distributions and
            Securities                       Taxes; General Information

    7       Purchase of Securities Being     Purchase of Shares; Determination
            Offered                          of Net Asset Value

    8       Redemption or Repurchase         Redemption of Shares; Exchange
                                             Privilege

    9       Pending Legal Proceedings        Inapplicable

 
PART B                                       Caption in Statement
Item No.    Registration Statement Caption   of Additional Information
- --------    ------------------------------   -------------------------
 
   10       Cover Page                       Cover Page
 
   11       Table of Contents                Table of Contents
 
   12       General Information and History  History of the Funds
 
   13       Investment Objectives and        Investment Objectives and
                                             Policies; Investment Policies
                                             Restrictions; Appendix

   14       Management of the Fund           Trustees and Officers

   15       Contact Persons and Principal    Inapplicable
            Holders of Securities

   16       Investment Advisory and Other    Adviser, Personal Securities
            Services                         Trading, Distributor and
                                             Administrator; Additional
                                             Information
<PAGE>
 
PART B                                       Caption in Statement
Item No.    Registration Statement Caption   of Additional Information
- --------    ------------------------------   -------------------------

   17       Brokerage Allocation             Portfolio Transactions and
                                             Brokerage

   18       Capital Stock and Other          Dividends, Distributions and
            Securities                       Taxes; Description of Shares;
                                             Additional Information

   19       Purchase, Redemption and Pricing Additional Information Regarding
            of Securities Being Offered      Purchase of Shares; Additional
                                             Information Regarding Redemption
                                             of Shares; Determination of Net
                                             Asset Value; Retirement Plans;
                                             Additional Information

   20       Tax Status                       Dividends, Distributions and Taxes

   21       Underwriters                     Adviser, Personal Securities
                                             Trading, Distributor and
                                             Administrator

   22       Calculation of Performance Data  Performance Data

   23       Financial Statements             Financial Statements


PART C

     The information required to be included in Part C is set forth under the
appropriate item, so numbered in Part C of this Registration Statement.


                 
<PAGE>
 
                            SUNAMERICA INCOME FUNDS
 
       THE SUNAMERICA CENTER, 733 THIRD AVENUE, NEW YORK, NY 10017-3204
 
                 GENERAL MARKETING AND SHAREHOLDER INFORMATION
 
                                (800) 858-8850
 
  SunAmerica Income Funds is an open-end diversified management investment
company organized as a Massachusetts business trust (the "Trust") with five
different investment funds (each, a "Fund" and collectively, the "Funds").
Each Fund is a separate series of the Trust with distinct investment
objectives and/or strategies. Each Fund is advised and managed by SunAmerica
Asset Management Corp. (the "Adviser"). An investor may invest in one or more
of the following Funds:
 
  SunAmerica U.S. Government Securities Fund ("Government Securities Fund")--
seeks high current income consistent with relative safety of capital by
investing primarily in securities issued or guaranteed by the U.S. government,
or any agency or instrumentality thereof. The Government Securities Fund is
neither insured nor guaranteed by the U.S. government.
 
  SunAmerica Federal Securities Fund ("Federal Securities Fund")--seeks
current income, with capital appreciation as a secondary objective, by
investing primarily in securities issued or guaranteed by the U.S. government
or any agency or instrumentality thereof. Further, a significant portion of
the Fund's assets will be invested in mortgage-backed securities.
 
  SunAmerica Diversified Income Fund ("Diversified Income Fund")--seeks a high
level of current income consistent with moderate investment risk, with
preservation of capital as a secondary objective. The Fund may invest a
significant portion of its assets in lower-rated bonds, commonly referred to
as "junk bonds."
 
  SunAmerica High Income Fund ("High Income Fund")--seeks maximum current
income by investing primarily in high-yield, high-risk corporate bonds. The
High Income Fund invests predominantly in lower-rated bonds, commonly referred
to as "junk bonds."
 
  SunAmerica Tax Exempt Insured Fund ("Tax Exempt Insured Fund")--seeks as
high a level of current income exempt from Federal income taxes as is
consistent with preservation of capital. Although particular securities of the
Fund may be insured as to the timely payment of principal and interest, the
Fund is not insured by any independent parties or governmental entities.
 
  THE DIVERSIFIED INCOME FUND MAY, AND THE HIGH INCOME FUND WILL, INVEST IN
LOWER-RATED BONDS COMMONLY REFERRED TO AS "JUNK BONDS." THESE SECURITIES ARE
SPECULATIVE AND MAY BE SUBJECT TO GREATER RISK OF LOSS OF PRINCIPAL AND
INTEREST THAN ARE INVESTMENTS IN HIGHER-RATED BONDS. BECAUSE INVESTMENT IN
SUCH SECURITIES ENTAILS GREATER RISKS, AN INVESTMENT IN THE DIVERSIFIED INCOME
FUND AND HIGH INCOME FUND SHOULD NOT CONSTITUTE A COMPLETE INVESTMENT PROGRAM
AND MAY NOT BE APPROPRIATE FOR ALL INVESTORS.
   
  Each Fund currently offers Class A shares and Class B shares. The High
Income Fund also offers Class C shares. The offering price is the next-
determined net asset value per share, plus for each class a sales charge
which, at the investor's option, may be (i) imposed at the time of purchase
(Class A shares) or (ii) deferred (Class B and Class C shares, and purchases
of Class A shares in excess of $1 million). Class B shares are offered without
an initial sales charge, although a declining contingent deferred sales charge
("CDSC") may be imposed on redemptions made within six years of purchase.
Class B shares of each Fund will convert automatically to Class A shares on
the first business day of the month seven years after the issuance of such
Class B shares and at such time will be subject to the lower distribution fee
applicable to Class A shares. Class C shares also are offered without an
initial sales charge, but may be subject to a CDSC imposed on redemptions made
within one year of purchase. Each Class makes distribution and account
maintenance and service fee payments under a distribution plan pursuant to
Rule 12b-1 under the Investment Company Act of 1940, as amended (the "1940
Act"). See "Purchase of Shares."     
 
  Shares of the Funds are not deposits or obligations of, or guaranteed or
endorsed by, any bank through which shares may be sold, and are not federally
insured by the Federal Deposit Insurance Corporation, the Federal Reserve
Board, or any other agency.
   
  This Prospectus explains concisely what you should know before investing in
any of the Funds. Please read it carefully before investing and retain it for
future reference. You can find more detailed information about the Funds in
the Statement of Additional Information dated July 27, 1998, which is
incorporated by reference into this Prospectus, and further information about
the performance of the Funds in the Trust's Annual Report to Shareholders. The
Statement of Additional Information and Annual Report to Shareholders may be
obtained without charge by contacting the Trust at the address or telephone
number listed above.     
 
- -------------------------------------------------------------------------------
  THESE SECURITIES HAVE NOT  BEEN APPROVED OR  DISAPPROVED BY THE SECURITIES
    AND EXCHANGE COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
      PASSED UPON THE ACCURACY OR  ADEQUACY OF THIS PROSPECTUS. ANY REP-
        RESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
- -------------------------------------------------------------------------------
   
  Information about the Trust (including the Statement of Additional
Information) can be reviewed and copied at the Securities and Exchange
Commission's ("SEC") Public Reference Room in Washington, D.C. Information on
the operation of the public reference room may be obtained by calling the SEC
at (800) SEC-0330. Reports and other information about the Trust are available
on the SEC's Internet site at http://www.sec.gov. Copies of this information
may be obtained, upon payment of a duplicating fee, by writing the Public
Reference Section of the SEC, Washington, D.C. 20549-6009.     
                         
                      PROSPECTUS DATED JULY 27, 1998     
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     -----
<S>                                  <C>
Prospectus.......................... Cover
Summary of Fund Expenses............     2
Financial Highlights................     4
Investment Objectives and Policies..     7
Government Securities Fund..........     7
Federal Securities Fund.............     7
Diversified Income Fund.............     8
High Income Fund....................     8
Tax Exempt Insured Fund.............     9
Investment Techniques and Risk Fac-
 tors...............................    10
Investment Restrictions.............    17
</TABLE>
<TABLE>   
<CAPTION>
                                       PAGE
                                       ----
<S>                                    <C>
Management of the Trust..............   17
Purchase of Shares...................   19
Redemption of Shares.................   23
Exchange Privilege...................   24
Portfolio Transactions, Brokerage and
 Turnover............................   25
Determination of Net Asset Value.....   26
Performance Data.....................   26
Dividends, Distributions and Taxes...   26
General Information..................   27
</TABLE>    
                            SUMMARY OF FUND EXPENSES
 
  A general comparison of the sales arrangements and other non-recurring ex-
penses applicable to Class A, Class B and Class C shares follows:
 
<TABLE>   
<CAPTION>
                          GOVERNMENT    FEDERAL                                 TAX EXEMPT
                          SECURITIES  SECURITIES  DIVERSIFIED                     INSURED
                             FUND        FUND     INCOME FUND HIGH INCOME FUND     FUND
                          ----------- ----------- ----------- ----------------- -----------
                          CLASS CLASS CLASS CLASS CLASS CLASS CLASS CLASS CLASS CLASS CLASS
                            A     B     A     B     A     B     A     B     C     A     B
                          ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
<S>                       <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>
SHAREHOLDER TRANSACTIONS
 EXPENSES
 Maximum Initial Sales
  Load(/1/).............  4.75%  None 4.75% None  4.75% None  4.75% None  None  4.75% None
 Maximum Sales Load on
  Reinvested Dividends..  None   None None  None  None  None  None  None  None  None  None
 Maximum Deferred Sales
  Load(/2/).............  None  4.00% None  4.00% None  4.00% None  4.00% 1.00% None  4.00%
 Redemption Fees(/3/)...  None  None  None  None  None  None  None  None  None  None  None
 Exchange Fees..........  None  None  None  None  None  None  None  None  None  None  None
ANNUAL FUND OPERATING
 EXPENSES
 (AS A PERCENTAGE OF
 AVERAGE NET ASSETS)
 (NET OF FEE WAIVERS/
 EXPENSE REIMBURSEMENTS)
 Management Fees........  0.74% 0.74% 0.53% 0.53% 0.65% 0.65% 0.75% 0.75% 0.75% 0.50% 0.50%
 12b-1 Fees(/4/)........  0.35% 1.00% 0.35% 1.00% 0.35% 1.00% 0.35% 1.00% 1.00% 0.35% 1.00%
 Other Expenses.........  0.54% 0.52% 0.59% 0.60% 0.45% 0.41% 0.42% 0.38% 0.35% 0.39% 0.40%
                          ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
Total Operating Ex-
 penses(/5/)............  1.63% 2.26% 1.47% 2.13% 1.45% 2.06% 1.52% 2.13% 2.10% 1.24% 1.90%
                          ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====
</TABLE>    
- --------
(1) The front-end sales charge on Class A shares decreases with the size of the
    purchase to 0% for purchases of $1,000,000 or more. See "Purchase of
    Shares."
 
(2) Purchases of Class A shares in excess of $1,000,000 will be subject to a
    CDSC on redemptions made within one year of purchase. The CDSC on Class B
    shares applies only if a redemption occurs within six years from their pur-
    chase date. The CDSC on Class C shares applies only on redemptions made
    within one year of purchase.
 
(3) A $15.00 fee may be imposed for wire redemptions.
          
(4) 0.25% of the 12b-1 fee comprises an Account Maintenance and Service Fee. A
    portion of the Account Maintenance and Service Fee is allocated to member
    firms of the National Association of Securities Dealers, Inc. for continu-
    ous personal service by such members to investors in the Funds, such as re-
    sponding to shareholder inquiries, quoting net asset values, providing cur-
    rent marketing material and attending to other shareholder matters. Class B
    or Class C shareholders who own their shares for an extended period of time
    may pay more in Rule 12b-1 distribution fees than the economic equivalent
    of the maximum front-end sales charge permitted under the Conduct Rules of
    the National Association of Securities Dealers, Inc.     
   
(5) For the fiscal year ended March 31, 1998, the total operating expenses (be-
    fore waivers) for High Income Fund Class C were 7.47%.     
 
                                       2
<PAGE>
 
EXAMPLE:
 
  You would pay the following expenses on a $1,000 investment over various time
periods assuming (1) a 5% annual rate of return and (2) redemption at the end
of each time period. The 5% return and the expenses used in this example should
not be considered indicative of actual or expected performance or expenses both
of which will vary:
 
<TABLE>   
<CAPTION>
                                                 1 YEAR 3 YEARS 5 YEARS 10 YEARS
                                                 ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
GOVERNMENT SECURITIES FUND
 (Class A Shares)...............................  $63     $96    $132     $232
 (Class B Shares)*..............................  $63    $101    $141     $236
FEDERAL SECURITIES FUND
 (Class A Shares)...............................  $62     $92    $124     $215
 (Class B Shares)*..............................  $62     $97    $134     $222
DIVERSIFIED INCOME FUND
 (Class A Shares)...............................  $62     $92    $123     $213
 (Class B Shares)*..............................  $61     $95    $131     $216
HIGH INCOME FUND
 (Class A Shares)...............................  $62     $93    $126     $220
 (Class B Shares)*..............................  $62     $97    $134     $223
 (Class C Shares)...............................  $31     $66    $113     $243
TAX EXEMPT INSURED FUND
 (Class A Shares)...............................  $60     $85    $112     $190
 (Class B Shares)*..............................  $59     $90    $123     $197
</TABLE>    
 
  You would pay the following expenses on the same investment, assuming no
redemption:
 
<TABLE>   
<CAPTION>
                                                 1 YEAR 3 YEARS 5 YEARS 10 YEARS
                                                 ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
GOVERNMENT SECURITIES FUND
 (Class A Shares)...............................  $63     $96    $132     $232
 (Class B Shares)*..............................  $23     $71    $121     $236
FEDERAL SECURITIES FUND
 (Class A Shares)...............................  $62     $92    $124     $215
 (Class B Shares)*..............................  $22     $67    $114     $222
DIVERSIFIED INCOME FUND
 (Class A Shares)...............................  $62     $92    $123     $213
 (Class B Shares)*..............................  $21     $65    $111     $216
HIGH INCOME FUND
 (Class A Shares)...............................  $62     $93    $126     $220
 (Class B Shares)*..............................  $22     $67    $114     $223
 (Class C Shares)...............................  $21     $66    $113     $243
TAX EXEMPT INSURED FUND
 (Class A Shares)...............................  $60     $85    $112     $190
 (Class B Shares)*..............................  $19     $60    $103     $197
</TABLE>    
 
  The foregoing examples should not be considered a representation of past or
future expenses. Actual expenses may be greater or less than those shown.
 
- --------
* Class B shares convert to Class A shares on the first business day of the
  month following the seventh anniversary of the purchase of such Class B
  shares. Therefore, with respect to the 10-year expense information, years 8,
  9 and 10 reflect the expenses attributable to ownership of Class A shares.
 
                                       3
<PAGE>
 
                              FINANCIAL HIGHLIGHTS
   
  The following Financial Highlights for the year ended June 30, 1993, for the
period July 1, 1993 to March 31, 1994 and for each of the four years in the
period ended March 31, 1998 for the Government Securities Fund and for each of
the years in the period ended March 31, 1998 for the Federal Securities Fund,
have been audited by PricewaterhouseCoopers LLP (successor firm to Price
Waterhouse LLP), each Fund's independent accountants, whose report on the
financial statements containing such information for each of the five years in
the period ended March 31, 1998 is included in the Trust's Annual Report to
Shareholders. The information for the periods from inception to June 30, 1990
for the Government Securities Fund is derived from the Fund's financial
statements, which have been audited by other independent accountants. These
Financial Highlights should be read in conjunction with each Fund's financial
statements and notes thereto, which are included in the Statement of Additional
Information and are incorporated by reference herein.     
 
                           GOVERNMENT SECURITIES FUND
 
<TABLE>   
<CAPTION>
                                        NET
                                    GAIN (LOSS)                                          DISTRI-
                                        ON                                               BUTIONS
                                    INVESTMENTS                       DISTRI-           IN EXCESS           NET
                NET ASSET    NET       (BOTH               DIVIDENDS   BUTION            OF NET            ASSET
                 VALUE,    INVEST-   REALIZED   TOTAL FROM  FROM NET   (FROM   RETURN    INVEST-   TOTAL   VALUE,
PERIOD          BEGINNING   MENT        AND     INVESTMENT INVESTMENT  OTHER     OF       MENT    DISTRI-  END OF
ENDED           OF PERIOD INCOME(1) UNREALIZED) OPERATIONS   INCOME   SOURCES) CAPITAL   INCOME   BUTIONS  PERIOD
- ------          --------- --------- ----------- ---------- ---------- -------- -------  --------- -------  ------
                                                                                 CLASS A
                                                                                 -------
<S>             <C>       <C>       <C>         <C>        <C>        <C>      <C>      <C>       <C>      <C>
10/01/93-
 03/31/94(/3/)    $8.68     $0.28     $(0.34)     $(0.06)    $(0.14)   $  --   $(0.01)   $(0.08)  $(0.23)  $8.39
03/31/95           8.39      0.61      (0.30)       0.31      (0.47)      --      --        --     (0.47)   8.23
03/31/96           8.23      0.62       0.16        0.78      (0.51)      --      --        --     (0.51)   8.50
03/31/97           8.50      0.59      (0.26)       0.33      (0.48)      --      --        --     (0.48)   8.35
03/31/98           8.35      0.58       0.21        0.79      (0.48)      --      --        --     (0.48)   8.66
<CAPTION>
                                                                                 CLASS B
                                                                                 -------
<S>             <C>       <C>       <C>         <C>        <C>        <C>      <C>      <C>       <C>      <C>
06/30/89          $9.41     $0.87     $(0.30)     $ 0.57     $(0.87)   $  --   $  --     $  --    $(0.87)  $9.11
06/30/90           9.11      0.84      (0.21)       0.63      (0.84)      --      --        --     (0.84)   8.90
06/30/91           8.90      0.82        --         0.82      (0.73)    (0.09)    --        --     (0.82)   8.90
06/30/92           8.90      0.73      (0.02)       0.71      (0.57)    (0.16)    --        --     (0.73)   8.88
06/30/93(/5/)      8.88      0.64      (0.17)       0.47      (0.44)    (0.17)    --        --     (0.61)   8.74
07/01/93-
03/31/94           8.74      0.43      (0.40)       0.03      (0.24)      --    (0.01)    (0.13)   (0.38)   8.39
03/31/95           8.39      0.56      (0.30)       0.26      (0.41)      --      --        --     (0.41)   8.24
03/31/96           8.24      0.55       0.17        0.72      (0.45)      --      --        --     (0.45)   8.51
03/31/97           8.51      0.54      (0.26)       0.28      (0.43)      --      --        --     (0.43)   8.36
03/31/98           8.36      0.52       0.20        0.72      (0.42)      --      --        --     (0.42)   8.66
<CAPTION>
                                       RATIO OF
                               NET     EXPENSES          RATIO OF NET
                             ASSETS,      TO              INVESTMENT         PORT-
                              END OF   AVERAGE            INCOME TO          FOLIO
PERIOD             TOTAL       YEAR      NET               AVERAGE           TURN-
ENDED           RETURN(/2/)  (000'S)    ASSETS            NET ASSETS         OVER
- ------          ----------- ---------- ----------------- ------------------- -----
<S>             <C>         <C>        <C>               <C>                 <C>
10/01/93-
 03/31/94(/3/)     (0.68)%     $76,586   1.35%(/4/)(/6/)     6.83%(/4/)(/6/)   35%
03/31/95            3.89        73,399   1.46(/6/)           7.50(/6/)        105
03/31/96            9.62       125,504   1.44(/6/)           7.11(/6/)        142
03/31/97            3.98       113,171   1.54(/6/)           7.01(/6/)        148
03/31/98            9.62        97,496   1.63                6.73             229
<CAPTION>
<S>             <C>         <C>        <C>               <C>                 <C>
06/30/89            6.64%     $300,415   2.03%               9.59%             51%
06/30/90            7.61       425,890   1.98                9.45              31
06/30/91            9.55       513,062   1.98(/6/)           9.31(/6/)         38
06/30/92            8.33     1,075,668   1.92                8.21              54
06/30/93(/5/)       5.49     1,259,845   1.82(/6/)           7.27(/6/)         73
07/01/93-
03/31/94            0.25       886,089   1.95(/4/)(/6/)      6.61(/4/)(/6/)    35
03/31/95            3.25       594,779   2.15(/6/)           6.80(/6/)        105
03/31/96            8.87       428,772   2.13                6.46             142
03/31/97            3.31       289,040   2.18                6.36             148
03/31/98            8.80       207,950   2.26                6.11             229
</TABLE>    
 
                            FEDERAL SECURITIES FUND
 
<TABLE>   
<CAPTION>
                                         NET
                                     GAIN (LOSS)                                     DISTRI-
                                         ON                                          BUTIONS
                                     INVESTMENTS                                    IN EXCESS           NET
               NET ASSET   NET          (BOTH               DIVIDENDS                OF NET            ASSET
                VALUE,   INVEST-      REALIZED   TOTAL FROM  FROM NET  DISTRIBUTION  INVEST-   TOTAL   VALUE,
               BEGINNING  MENT           AND     INVESTMENT INVESTMENT FROM CAPITAL   MENT    DISTRI-  END OF
PERIOD ENDED   OF PERIOD INCOME      UNREALIZED) OPERATIONS   INCOME      GAINS      INCOME   BUTIONS  PERIOD
- ------------   --------- -------     ----------- ---------- ---------- ------------ --------- -------  ------
                                                                                CLASS A
                                                                                -------
<S>            <C>       <C>         <C>         <C>        <C>        <C>          <C>       <C>      <C>
10/11/93-
03/31/94(/3/)   $10.58    $0.22(/1/)   $(0.34)     $(0.12)    $(0.23)     $(0.01)    $  --    $(0.24)  $10.22
03/31/95         10.22     0.60(/1/)    (0.20)       0.40      (0.64)        --         --     (0.64)    9.98
03/31/96          9.98     0.68(/1/)     0.40        1.08      (0.63)        --         --     (0.63)   10.43
03/31/97         10.43     0.65(/1/)    (0.10)       0.55      (0.59)        --         --     (0.59)   10.39
03/31/98         10.39     0.62(/1/)     0.63        1.25      (0.59)      (0.02)       --     (0.61)   11.03
<CAPTION>
                                                                                CLASS B
                                                                                -------
<S>            <C>       <C>         <C>         <C>        <C>        <C>          <C>       <C>      <C>
03/31/89        $10.13    $0.84        $(0.45)     $ 0.39     $(0.84)     $  --      $  --    $(0.84)  $ 9.68
03/31/90          9.68     0.80          0.23        1.03      (0.80)        --         --     (0.80)    9.91
03/31/91          9.91     0.77          0.44        1.21      (0.77)        --         --     (0.77)   10.35
03/31/92         10.35     0.77          0.29        1.06      (0.77)        --         --     (0.77)   10.64
03/31/93         10.64     0.70          0.14        0.84      (0.64)        --         --     (0.64)   10.84
03/31/94         10.84     0.62(/1/)    (0.71)      (0.09)     (0.49)      (0.03)     (0.01)   (0.53)   10.22
03/31/95         10.22     0.63(/1/)    (0.26)       0.37      (0.58)        --         --     (0.58)   10.01
03/31/96         10.01     0.56(/1/)     0.44        1.00      (0.56)        --         --     (0.56)   10.45
03/31/97         10.45     0.57(/1/)    (0.08)       0.49      (0.52)        --         --     (0.52)   10.42
03/31/98         10.42     0.55(/1/)     0.63        1.18      (0.52)      (0.02)       --     (0.54)   11.06
<CAPTION>
                             NET                       RATIO OF NET
                           ASSETS,   RATIO OF           INVESTMENT         PORT-
                            END OF   EXPENSES           INCOME TO          FOLIO
                  TOTAL     PERIOD  TO AVERAGE           AVERAGE           TURN-
PERIOD ENDED   RETURN(/2/) (000'S)  NET ASSETS          NET ASSETS         OVER
- ------------   ----------- -------- ------------------ ------------------- -----
<S>            <C>         <C>      <C>                <C>                 <C>
10/11/93-
03/31/94(/3/)     (1.14)%      $592    1.39%(/4/)(/6/)     4.68%(/4/)(/6/)   68%
03/31/95           4.18       6,259    1.40(/6/)           6.90(/6/)        267
03/31/96          10.94      40,278    1.37                6.12             311
03/31/97           5.40      30,509    1.41                6.11             426
03/31/98          12.29      31,628    1.47                5.75             529
<CAPTION>
<S>            <C>         <C>      <C>                <C>                 <C>
03/31/89           3.67%   $163,942    1.78%               8.41%             17%
03/31/90          10.95     141,277    1.92                8.06              21
03/31/91          12.78     129,108    1.93                7.67              23
03/31/92          10.57     120,454    1.90                7.32              57
03/31/93           8.06     121,267    1.85                6.36              97
03/31/94          (0.89)     81,011    1.98                5.79              68
03/31/95           3.81      65,631    2.03                6.33             267
03/31/96          10.13      26,165    2.01                5.64             311
03/31/97           4.82      18,929    2.07                5.46             426
03/31/98          11.54      18,837    2.13                5.09             529
</TABLE>    
- -------
(1) Calculated based upon average shares outstanding
(2) Total Return is not annualized and does not reflect sales load
(3) Commencement of sale of respective class of shares
(4) Annualized
(5) Pursuant to a reorganization of the SunAmerica Mutual Funds, the Fund
    changed its fiscal year end to March 31
(6) Net of the following expense reimbursements (based on average net assets):
<TABLE>   
<CAPTION>
                                6/30/91 6/30/93 3/31/94 3/31/95 3/31/96 3/31/97
                                ------- ------- ------- ------- ------- -------
       <S>                      <C>     <C>     <C>     <C>     <C>     <C>
       Government Securities
        Fund Class A              --      --      .10%    .07%   .04%    .01%
       Government Securities
        Fund Class B             .08%    .02%     .06%    .03%    --      --
       Federal Securities Fund
        Class A                   --      --     6.74%   1.26%    --      --
</TABLE>    
 
                                       4
<PAGE>
 
   
  The following Financial Highlights for each of the periods through March 31,
1998 for the Diversified Income Fund and the High Income Fund, have been
audited by PricewaterhouseCoopers LLP (successor firm to Price Waterhouse LLP),
each Fund's independent accountants, whose report on the financial statements
containing such information for each of the five periods through March 31, 1998
is included in the Trust's Annual Report to Shareholders. These Financial
Highlights should be read in conjunction with each Fund's financial statements
and notes thereto, which are included in the Statement of Additional
Information and are incorporated by reference herein.     
 
                            DIVERSIFIED INCOME FUND
 
<TABLE>   
<CAPTION>
                                                   NET
                                              GAIN (LOSS) ON                        NET
                      NET ASSET                INVESTMENTS              DIVIDENDS  ASSET
                       VALUE,      NET        (BOTH REALIZED TOTAL FROM  FROM NET  VALUE,
                      BEGINNING INVESTMENT         AND       INVESTMENT INVESTMENT END OF    TOTAL
PERIOD ENDED          OF PERIOD   INCOME       UNREALIZED)   OPERATIONS   INCOME   PERIOD RETURN(/1/)
- ------------          --------- ----------    -------------- ---------- ---------- ------ -----------
                                                                             CLASS A
                                                                             -------
<S>                   <C>       <C>           <C>            <C>        <C>        <C>    <C>
10/05/93 -
  10/31/93(/2/)(/5/)    $5.05     $0.02(/3/)      $ 0.01       $ 0.03     $(0.01)  $5.07      0.65%
11/01/93 -
  3/31/94                5.07      0.13(/3/)       (0.23)       (0.10)     (0.18)   4.79     (2.10)
03/31/95                 4.79      0.43(/3/)       (0.66)       (0.23)     (0.42)   4.14     (5.10)
03/31/96                 4.14      0.39(/3/)        0.16         0.55      (0.40)   4.29     13.78
03/31/97                 4.29      0.37(/3/)        0.10         0.47      (0.37)   4.39     11.43
03/31/98                 4.39      0.40(/3/)        0.27         0.67      (0.38)   4.68     15.84
<CAPTION>
                                                                             CLASS B
                                                                             -------
<S>                   <C>       <C>           <C>            <C>        <C>        <C>    <C>
4/06/91 -
  10/31/91(/6/)         $5.29     $0.28           $(0.08)      $ 0.20     $(0.28)  $5.21      3.40%
10/31/92(/6/)            5.21      0.42            (0.41)        0.01      (0.40)   4.82      0.16
10/31/93(/5/)(/6/)       4.82      0.38(/3/)        0.24         0.62      (0.37)   5.07     13.35
11/01/93 -
  3/31/94                5.07      0.15(/3/)       (0.27)       (0.12)     (0.16)   4.79     (2.52)
03/31/95                 4.79      0.40(/3/)       (0.65)       (0.25)     (0.39)   4.15     (5.46)
03/31/96                 4.15      0.36(/3/)        0.17         0.53      (0.38)   4.30     13.09
03/31/97                 4.30      0.35(/3/)        0.10         0.45      (0.35)   4.40     10.73
03/31/98                 4.40      0.38(/3/)        0.26         0.64      (0.35)   4.69     15.11
<CAPTION>
                        NET                      RATIO OF NET
                      ASSETS,  RATIO OF           INVESTMENT
                      END OF   EXPENSES           INCOME TO
                      PERIOD  TO AVERAGE         AVERAGE NET         PORTFOLIO
PERIOD ENDED          (000'S) NET ASSETS            ASSETS           TURNOVER
- ------------          ------- ------------------ ------------------- ---------
<S>                   <C>     <C>                <C>                 <C>
10/05/93 -
  10/31/93(/2/)(/5/)     $762    1.40%(/4/)          8.92%(/4/)         249%
11/01/93 -
  3/31/94              12,600    1.42(/4/)(/8/)      8.25(/4/)(/8/)      48
03/31/95               14,213    1.59                9.58               160
03/31/96               16,762    1.46                8.96               166
03/31/97               22,601    1.42                8.68               131
03/31/98               25.517    1.45                8.83               157
<CAPTION>
<S>                   <C>     <C>                <C>                 <C>
4/06/91 -
  10/31/91(/6/)       $39,790    0.00%(/4/)(/8/)     8.87%(/4/)(/8/)      8%
10/31/92(/6/)          35,409    0.74(/8/)           7.81(/8/)          191
10/31/93(/5/)(/6/)    102,519    1.78(/8/)           7.53(/8/)          249
11/01/93 -
  3/31/94             174,072    2.11(/4/)           7.48(/4/)           48
03/31/95              132,378    2.12                8.98               160
03/31/96              110,949    2.06                8.42               166
03/31/97               78,081    2.04                8.05               131
03/31/98               63,397    2.06                8.14               157
</TABLE>    
 
                                HIGH INCOME FUND
 
<TABLE>   
<CAPTION>
                                              NET
                                         GAIN (LOSS) ON
                 NET ASSET                INVESTMENTS              DIVIDENDS
                  VALUE,      NET        (BOTH REALIZED TOTAL FROM  FROM NET
                 BEGINNING INVESTMENT         AND       INVESTMENT INVESTMENT
PERIOD ENDED     OF PERIOD   INCOME       UNREALIZED)   OPERATIONS   INCOME
- ------------     --------- ----------    -------------- ---------- ----------
<S>              <C>       <C>           <C>            <C>        <C>
                                                                      CLASS A
03/31/89(7)        $9.07     $1.14           $(0.12)      $1.02      $(1.11)
03/31/90(/7/)       8.98      1.05            (1.86)      (0.81)      (1.06)
03/31/91(/7/)       7.11      0.88            (0.27)       0.61       (0.88)
03/31/92(/7/)       6.84      0.95             1.28        2.23       (1.00)
03/31/93(/7/)       8.07      0.95             0.18        1.13       (1.08)
03/31/94(/7/)       8.12      0.87(/3/)       (0.14)       0.73       (0.82)
03/31/95            8.03      0.78(/3/)       (1.03)      (0.25)      (0.83)
03/31/96            6.95      0.67(/3/)        0.02        0.69       (0.69)
03/31/97            6.95      0.65(/3/)        0.12        0.77       (0.66)
03/31/98            7.06      0.68             0.68        1.36       (0.64)
                                                                      CLASS B
10/01/93 -
  03/31/94(/2/)    $8.18     $0.38(/3/)      $(0.17)      $0.21      $(0.35)
03/31/95            8.04      0.73(/3/)       (1.02)      (0.29)      (0.79)
03/31/96            6.96      0.62(/3/)        0.03        0.65       (0.65)
03/31/97            6.96      0.61(/3/)        0.12        0.73       (0.62)
03/31/98(/9/)       7.07      0.63(/3/)        0.69        1.32       (0.60)
                                                                      CLASS C
02/02/98 -
  03/31/98(/2/)    $7.70     $0.10(/3/)      $ 0.07       $0.17      $(0.08)
<CAPTION>
                                             RATIO OF
                  NET                 NET    EXPENSES          RATIO OF NET
                 ASSET              ASSETS,     TO              INVESTMENT
                 VALUE,              END OF  AVERAGE            INCOME TO
                 END OF    TOTAL      YEAR     NET             AVERAGE NET          PORTFOLIO
PERIOD ENDED     PERIOD RETURN(/1/) (000'S)   ASSETS              ASSETS            TURNOVER
- ------------     ------ ----------- -------- ----------------- -------------------- ---------
<S>              <C>    <C>         <C>      <C>               <C>                  <C>
03/31/89(7)      $8.98     11.21%    $37,122   1.76%              12.43%               135%
03/31/90(/7/)     7.11    (10.45)     23,162   1.94               12.59                112
03/31/91(/7/)     6.84      9.51      19,347   1.90               12.77                 95
03/31/92(/7/)     8.07     35.27      22,607   1.57               13.19                208
03/31/93(/7/)     8.12     15.05      30,715   1.77               11.08                232
03/31/94(/7/)     8.03      9.14      33,724   1.72               10.34                290
03/31/95          6.95     (2.91)     40,585   1.61               10.82                196
03/31/96          6.95     10.43      35,963   1.53                9.36                183
03/31/97          7.06     11.46      41,139   1.50                9.10                164
03/31/98          7.78     20.07      56,442   1.52                9.13                236
10/01/93 -
  03/31/94(/2/)  $8.04      2.46%   $131,713   2.15%(/4/)(/8/)     9.07%(/4/)(/8/)     290%
03/31/95          6.96     (3.42)    153,034   2.16(/8/)          10.26(/8/)           196
03/31/96          6.96      9.83      91,800   2.06(/8/)           8.85(/8/)           183
03/31/97          7.07     10.78      98,383   2.11(/8/)           8.49(/8/)           164
03/31/98(/9/)     7.79     19.31     124,962   2.13                8.51                236
02/02/98 -
  03/31/98(/2/)  $7.79      2.18%     $1,146   2.10%(/4/)(/8/)     9.78%(/4/)(/8/)     236%
</TABLE>    
- -------
(1) Total Return is not annualized and does not reflect sales load
(2) Commencement of sale of respective class of shares
(3) Calculated based upon average shares outstanding
(4) Annualized
(5) Pursuant to a reorganization of the SunAmerica Mutual Funds, the Fund
    changed its fiscal year end to March 31
(6) Restated to reflect 1.889180183-for-1 stock split effective December 16,
    1992
(7) Restated to reflect 1.174107276-for-1 stock split effective October 1, 1993
(8) Net of the following expense reimbursements (based on average net assets):
<TABLE>   
<CAPTION>
                                 10/31/91 10/31/92 10/31/93 3/31/94 3/31/95 3/31/96 3/31/97 3/31/98
                                 -------- -------- -------- ------- ------- ------- ------- -------
       <S>                       <C>      <C>      <C>      <C>     <C>     <C>     <C>     <C>
       Diversified Income Fund
        Class A                     --       --      --       .62%    --      --      --      --
       Diversified Income Fund
        Class B                    2.31%    1.25%    .38%     --      --      --      --      --
       High Income Fund Class A     --       --      --       --      --      --      --      --
       High Income Fund Class B     --       --      --       .08%    .08%    .08%    .01%    --
       High Income Fund Class C     --       --      --       --      --      --      --     5.37%
</TABLE>    
       
                                       5
<PAGE>
 
   
  The following Financial Highlights for each of the periods through March 31,
1998 for the Tax Exempt Insured Fund, have been audited by
PricewaterhouseCoopers LLP (successor firm to Price Waterhouse LLP), the Fund's
independent accountants, whose report on the financial statements containing
such information for each of the five periods through March 31, 1998 is
included in the Trust's Annual Report to Shareholders. These Financial
Highlights should be read in conjunction with the Fund's financial statements
and notes thereto, which are included in the Statement of Additional
Information and are incorporated by reference herein.     
 
                            TAX EXEMPT INSURED FUND
 
<TABLE>   
<CAPTION>
                                                 NET
                                             GAIN (LOSS)
                                                 ON                                                           RATIO OF
                                             INVESTMENTS                            NET                NET    EXPENSES
                     NET ASSET                  (BOTH               DIVIDENDS      ASSET              ASSETS     TO
                       VALUE      NET         REALIZED   TOTAL FROM  FROM NET      VALUE              END OF  AVERAGE
                     BEGINNING INVESTMENT        AND     INVESTMENT INVESTMENT     END OF    TOTAL    PERIOD    NET
   PERIOD ENDED      OF PERIOD   INCOME      UNREALIZED) OPERATIONS   INCOME       PERIOD  RETURN(1) (000'S)   ASSETS
- -------------------  --------- ----------    ----------- ---------- ----------     ------  --------- -------- --------
                                                              CLASS A
                                                              -------
<S>                  <C>       <C>           <C>         <C>        <C>            <C>     <C>       <C>      <C>
10/31/89              $12.18     $0.82         $ 0.09      $ 0.91     $(0.82)      $12.27     7.53%  $105,834   1.32%
10/31/90               12.27      0.82          (0.07)       0.75      (0.82)       12.20     6.28     89,950   1.31
10/31/91               12.20      0.81           0.21        1.02      (0.81)       12.41     8.62     95,246   1.32
10/31/92               12.41      0.79          (0.07)       0.72      (0.80)(/3/)  12.33     5.93    110,364   1.25
10/31/93(/2/)          12.33      0.70(/4/)      0.50        1.20      (0.74)       12.79     9.95    191,350   1.10(/7/)
11/01/93-
 3/31/94               12.79      0.26(/4/)     (0.84)      (0.58)     (0.26)       11.95    (4.61)   165,216   1.28(/5/)(/7/)
03/31/95               11.95      0.63(/4/)      0.17        0.80      (0.62)       12.13     6.97    137,955   1.20(7)
03/31/96               12.13      0.59(/4/)      0.29        0.88      (0.59)       12.42     7.37    121,957   1.22
03/31/97               12.42      0.59(/4/)     (0.07)       0.52      (0.59)       12.35     4.24     98,376   1.24
03/31/98               12.35      0.58(/4/)      0.67        1.25      (0.57)       13.03    10.28     88,519   1.24
<CAPTION>
                                                              CLASS B
                                                              -------
<S>                  <C>       <C>           <C>         <C>        <C>            <C>     <C>       <C>      <C>
10/04/93-
 10/31/93(/2/)(/6/)   $12.84     $0.02(/4/)    $(0.05)     $(0.03)    $(0.02)       12.79%   (0.24)%   $4,922   1.96%(/5/)
11/01/93-
 3/31/94               12.79      0.22(/4/)     (0.83)      (0.61)     (0.23)       11.95    (4.84)    20,765   2.12(/5/)
03/31/95               11.95      0.54(/4/)      0.19        0.73      (0.54)       12.14     6.29     25,985   1.92
03/31/96               12.14      0.50(/4/)      0.29        0.79      (0.51)       12.42     6.58     29,315   1.90
03/31/97               12.42      0.52(/4/)     (0.08)       0.44      (0.51)       12.35     3.57     25,053   1.88
03/31/98               12.35      0.49(/4/)      0.68        1.17      (0.48)       13.04     9.65     22,878   1.90
<CAPTION>
                       RATIO OF NET
                        INVESTMENT
                     INCOME TO AVERAGE  PORTFOLIO
   PERIOD ENDED         NET ASSETS      TURNOVER
- -------------------- ------------------ ---------
<S>                  <C>                <C>
10/31/89                 6.68%              10%
10/31/90                 6.70                0
10/31/91                 6.57               16
10/31/92                 6.26               21
10/31/93(/2/)            5.56(/7/)          26
11/01/93-
 3/31/94                 4.99(/5/)(/7/)     52
03/31/95                 5.32(/7/)         162
03/31/96                 4.72               46
03/31/97                 4.77               51
03/31/98                 4.52               48
<CAPTION>
<S>                  <C>                <C>
10/04/93-
 10/31/93(/2/)(/6/)      4.09%(/5/)         26%
11/01/93-
 3/31/94                 4.17(/5/)          52
03/31/95                 4.60              162
03/31/96                 4.03               46
03/31/97                 4.13               51
03/31/98                 3.86               48
</TABLE>    
- --------
(1) Total return is not annualized and does not reflect sales load
(2) Pursuant to reorganization of the SunAmerica Mutual Funds, the Fund changed
    its fiscal year end to March 31
(3) Prior year amounts reclassified to net investment income
(4) Calculated based upon average shares outstanding
(5) Annualized
(6) Commencement of sale of respective class of shares
(7) Net of the following expense reimbursements (based on average net assets):
 
<TABLE>
<CAPTION>
                                    10/31/93 3/31/94 3/31/95
                                    -------- ------- -------
          <S>                       <C>      <C>     <C>
          Tax Exempt Insured Fund
           Class A                    .10%    .11%    .04%
</TABLE>
     
      
                                       6
<PAGE>
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The investment objective of the Government Securities Fund is high current
income consistent with relative safety of capital. The investment objective of
the Federal Securities Fund is current income, with capital appreciation as a
secondary objective. The investment objective of the Diversified Income Fund
is a high level of current income consistent with moderate investment risk,
with preservation of capital as a secondary objective. The investment objec-
tive of the High Income Fund is maximum current income. The investment objec-
tive of the Tax Exempt Insured Fund is as high a level of current income ex-
empt from Federal income taxes as is consistent with preservation of capital.
Each Fund seeks to achieve its investment objective through investment primar-
ily in fixed income securities, as described below. There can be no assurance
that the investment objective of a Fund will be achieved.
 
  Except as specifically indicated, the investment policies and strategies de-
scribed herein are not fundamental policies of the Funds and may be changed by
the Board of Trustees (the "Trustees") without the approval of shareholders.
Each Fund's respective investment objective and fundamental investment re-
strictions, however, may not be changed without approval of shareholders of
the affected Fund. See "Investment Restrictions."
 
                          GOVERNMENT SECURITIES FUND
   
  The Fund seeks to achieve its investment objective by investing primarily in
securities issued or guaranteed by the U.S. government or any agency or in-
strumentality thereof ("U.S. government securities"). See "Investment Tech-
niques and Risk Factors--U.S. Government Securities" for a description of the
various types of U.S. government securities in which the Fund may invest. Un-
der normal circumstances, the Fund's strategy is to invest its assets in such
a way so as to minimize the impact of interest rate volatility.     
 
  Under normal market conditions, at least 65% of the Fund's assets will be
invested in U.S. government securities, including certain "mortgage-backed se-
curities". In addition to its primary investments, the Fund may invest in
short-term investments, including short-term U.S. government securities, re-
purchase agreements secured by U.S. government securities, and high quality
money market instruments (including commercial paper and bankers' accept-
ances). See "Investment Techniques and Risk Factors" and the Statement of Ad-
ditional Information for a description of other types of securities in which
the Fund may invest, including mortgage-backed securities, asset-backed secu-
rities and zero-coupon securities.
 
  The Adviser considers both the rate of return and the risk of loss in making
investments. While the Adviser anticipates that, over the long term, the Fund
will consist primarily of U.S. government securities, when interest rates are
rising or for temporary defensive purposes, the Fund may also invest rela-
tively greater portions of its assets in short-term investments. The invest-
ment approach of the Adviser will be characterized by gradual, measured
changes, rather than dramatic shifts, in the maturity structure of the Fund to
reflect what the Adviser believes to be measurable interest rate trends. The
Adviser will select debt securities with longer maturities during periods when
interest rates are declining and securities with shorter maturities when in-
terest rates are rising.
 
  Declining interest rates generally encourage strong bond markets; rising in-
terest rates correspondingly tend to foster weak bond markets. As the bond
market weakens, liquidity of a portfolio becomes increasingly important. For
example, in an uncertain market with no clear trend in interest rates, liquid-
ity is a critical factor and effective portfolio maturities may be reduced to
two years or less. In a stable bond market, liquidity would be only a moderate
concern and the maturities may be lengthened to approximately eight to ten
years. In a strong bond market, liquidity would generally be a minor consider-
ation and maturities may range from ten to thirty years.
 
                            FEDERAL SECURITIES FUND
 
  The Fund seeks to achieve its objective by investing primarily in U.S. gov-
ernment securities. Under normal circumstances, the Fund's strategy is to in-
vest its assets in such a way so as to maximize capital appreciation in a de-
clining interest rate environment.
 
                                       7
<PAGE>
 
   
  Under normal market conditions, at least 80% of the Fund's assets will be
invested in U.S. government securities, including "mortgage-backed securi-
ties." In addition to its primary investments, the Fund may invest in short-
term investments, including short-term U.S. government securities, repurchase
agreements secured by U.S. government securities; high quality money market
instruments (including commercial paper and bankers' acceptances); privately
issued collateralized mortgage obligations; and corporate debt securities. In
general, the Adviser anticipates that, over the long term, the Fund's invest-
ments will consist primarily of U.S. government securities. However, when in-
terest rates are rising or as a temporary defensive strategy, the Fund may in-
vest a greater portion of its assets in such other types of investments. See
"Investment Techniques and Risk Factors" and the Statement of Additional In-
formation for a description of the types of securities in which the Fund may
invest, including U.S. government securities, mortgage-backed securities, as-
set-backed securities and zero-coupon securities.     
 
  The investment approach of the Adviser will be characterized by gradual,
measured changes, rather than dramatic shifts, in the maturity structure of
the Fund to reflect what the Adviser believes to be measurable interest rate
trends. The Adviser will select debt securities with longer maturities during
periods when interest rates are declining and securities with shorter maturi-
ties when interest rates are rising.
 
                            DIVERSIFIED INCOME FUND
   
  The Diversified Income Fund invests in a diversified portfolio of securities
consisting of: (i) U.S. government securities; (ii) foreign government and
corporate debt securities; and (iii) securities issued by domestic corpora-
tions, including lower-rated high-yield securities, without regard to the ma-
turities of such securities. Under normal conditions, at least 65% of
the Fund's total assets will be invested in income-producing securities, and
the Fund's assets will be invested in each of the three categories. In addi-
tion, the Fund will generally have no more than 75% of its total assets in-
vested in any one category. Distributable income may fluctuate as the Fund
shifts assets among the three categories. See "Investment Techniques and Risk
Factors" and the Statement of Additional Information for a description of the
types of securities in which the Fund may invest, including mortgage-backed
securities, asset-backed securities, zero-coupon securities, participation in-
terests and foreign securities.     
   
  The higher yields and high income sought by the Fund are generally obtain-
able from securities in the lower rating categories of the established rating
services. Such securities are rated "Baa" or lower by Moody's Investors Serv-
ice, Inc. ("Moody's") or "BBB" or lower by Standard & Poor's Ratings Services,
a Division of the McGraw-Hill Companies, Inc. ("S&P"). The Fund may invest in
securities rated as low as "C" by Moody's or "D" by S&P. See the Appendix to
the Statement of Additional Information for a description of securities rat-
ings. Such ratings indicate that the obligations are speculative and may be in
default. The Fund is not obligated to dispose of securities whose issuers sub-
sequently are in default or if the rating of such securities is reduced. The
Fund may also invest in unrated securities which, in the opinion of the Advis-
er, offer comparable yields and risks as those securities which are rated. The
weighted average ratings by Moody's as a percentage of all bonds held in the
Diversified Income Fund's portfolio during the fiscal year ended March 31,
1998 were "AAA", 5.91%; "Ba1", 1.85%; "Ba2", 3.90%; "Ba3", 13.86%; "B1",
14.73%; "B2", 10.81%; "B3", 25.85%; "Caa", 3.29% and 19.81% unrated. See "In-
vestment Techniques and Risk Factors--High Yield/High Risk Securities" below.
    
                               HIGH INCOME FUND
 
  The High Income Fund seeks to achieve its objective by investing primarily
in high-yield, high-risk corporate bonds which generally are unrated or carry
ratings lower than those assigned to investment grade bonds by S&P or Moody's.
   
  High yield is ordinarily associated with unrated bonds or bonds in the lower
rating categories of the established rating services (securities rated "Baa"
or lower by Moody's or "BBB" or lower by S&P). See the Appendix to the State-
ment of Additional Information for a description of securities ratings. While
providing higher yields, such bonds, whether rated or unrated, are subject to
greater risks than lower-yielding, higher-rated, fixed-income securities.     
 
  The market value of bonds generally will be affected by changes in the level
of interest rates. An
 
                                       8
<PAGE>
 
increase in interest rates will tend to reduce the market value of bonds, and
a decline in interest rates will tend to increase their value. In addition,
bonds with longer maturities, which tend to produce higher yields, are subject
to potentially greater capital appreciation and depreciation than bonds with
shorter maturities. Fluctuations in the market value of bonds subsequent to
their acquisition will not affect cash income from such bonds, but will be re-
flected in net asset value.
   
  Although the bonds in which the High Income Fund will principally invest
will be in the lower rating categories and have speculative characteristics,
it will not invest in bonds rated less than "B" by Moody's or S&P unless the
Adviser believes, as a result of its own analysis as described below, that the
financial condition of the issuer or the protection afforded to the particular
bond is stronger than would otherwise be indicated by such low ratings. The
Adviser will select not only rated bonds, but may also select unrated bonds
that offer, in its opinion, an above-average yield without undue risk. The
High Income Fund may invest in instruments rated "Ca," "C" or "D" if the Ad-
viser believes that the opportunity for gain is greater than the risk of such
an investment. From time to time, the Fund will invest in securities which are
composed of both fixed- income and equity components. See the Appendix to the
Statement of Additional Information for a description of some of the risks as-
sociated with investing in lower-rated securities. The weighted average rat-
ings by Moody's as a percentage of all bonds held in the High Income Fund's
portfolio during the fiscal year ended March 31, 1998 were "Ba1," 1.74%;
"Ba2," 3.20%; "Ba3", 6.75%, "B1," 8.72%; "B2," 17.03%; "B3," 39.48%; "Ca",
0.34%, "Caa", 8.52%; and 14.22% unrated.     
 
  The Adviser considers both the opportunity for gain and the risk of loss in
selecting investments. Consistent with the primary objective, the Adviser an-
ticipates that, under normal conditions, at least 80% of the High Income
Fund's total assets will be invested in bonds, as described above. The remain-
ing assets may be invested in other securities, including U.S. government se-
curities, asset-backed securities, short-term debt instruments, and common and
preferred stock and other equity securities. See "In- vestment Techniques and
Risk Factors" for a description of the types of securities in which the Fund
may invest.
 
                            TAX EXEMPT INSURED FUND
 
  The Tax Exempt Insured Fund seeks to achieve its objective by investing, un-
der normal market conditions, at least 80% of its total assets in Municipal
Bonds, the income of which is exempt from Federal income taxes, and at least
65% of its total assets in Municipal Bonds that, in addition to having income
which is exempt from Federal income tax, also are insured as to the scheduled
payment of principal and interest for as long as such bonds are held by the
Fund, without regard to the maturities of such securities. The Fund's policy
of investing 80% of its total assets in Municipal Bonds, the income of which
is exempt from Federal income taxes, is a fundamental policy of the Fund which
may not be changed without the approval of the Fund's shareholders. The Fund
will not invest more than 25% of its total assets in Municipal Securities, the
issuers of which are located in the same state. Further, the Fund will not in-
vest in Municipal Securities rated below the four highest ratings categories
of Moody's or S&P, or if unrated, deemed by the Adviser to be of comparable
quality. On a temporary defensive basis or due to market conditions, the Fund
may invest up to 100% of its total assets in Municipal Notes and Short-Term
Taxable Securities (neither of which are insured), as well as in repurchase
agreements collateralized by such securities. See the Appendix to the State-
ment of Additional Information for more information with respect to ratings.
 
  "Municipal Securities" include long-term (i.e., maturing in over 10 years)
and medium-term (i.e., maturing in 3 to 10 years) municipal bonds ("Municipal
Bonds") as well as short-term (i.e., maturing in 1 day to 3 years) municipal
notes and tax-exempt commercial paper ("Municipal Notes"), and in each case
refers to debt obligations issued by or on behalf of states, territories and
possessions of the United States and the District of Columbia and their polit-
ical subdivisions, agencies and instrumentalities, the interest from which is,
in the opinion of bond counsel at the time of issuance, exempt from Federal
income tax.
 
  A portion of the Municipal Bonds in which the Fund invests may be issued by
state, county, city or agency authorities established for the purpose of pur-
chasing residential mortgages ("Municipal Housing Bonds"). To the extent prac-
ticable, the Fund will invest in insured Municipal Housing Bonds that are
 
                                       9
<PAGE>
 
secured by residential mortgages, when such mortgages are either insured by
the Federal Housing Authority ("FHA") or guaranteed by the Veteran's Adminis-
tration ("VA") of the United States government. Although the Fund will attempt
to geographically diversify its holdings of Municipal Housing Bonds, there may
be similar factors affecting the mortgagor's ability to maintain payments un-
der the underlying mortgages. Such factors could include changes in national
and state policies relating to transfer payments such as unemployment insur-
ance and welfare, and adverse economic developments, particularly those af-
fecting less skilled and low income workers.
 
  Insurance Feature. As discussed above, the Fund will invest at least 65% of
its total assets in Municipal Bonds that, at the time of purchase, either: (1)
are insured under a Mutual Fund Insurance Policy issued to the Fund by Finan-
cial Guaranty Insurance Company ("Financial Guaranty") or another insurer; (2)
are insured under an insurance policy obtained by the issuer or underwriter of
such Municipal Bonds at the time of original issuance thereof (a "New Issue
Insurance Policy"); or (3) are without insurance coverage, provided that, an
                                                           -------- ----
escrow or trust account has been established pursuant to the documents creat-
ing the Municipal Bonds and containing sufficient U.S. government securities
backed by the U.S. government's full faith and credit pledge to ensure the
payment of principal and interest on such bonds. If a Municipal Bond already
is covered by a New Issue Insurance Policy when acquired by the Fund, then
coverage will not be duplicated by a Mutual Fund Insurance Policy; if a Munic-
ipal Bond, other than that described in (3) above, is not covered by a New Is-
sue Insurance Policy then it will be covered by a Mutual Fund Insurance Policy
purchased by the Fund. The Fund may also purchase other Municipal Bonds or Mu-
nicipal Notes that are insured. However, in general, Municipal Notes presently
are not issued with New Issue Insurance Policies, and the Fund generally does
not expect to cover Municipal Notes under its Mutual Fund Insurance Policies.
Accordingly, the Fund does not presently expect that any significant portion
of the Municipal Notes it purchases will be covered by insurance.
   
  For the fiscal year ended March 31, 1998, the premiums for a Mutual Fund In-
surance Policy were 0.01% of the average net assets of the Fund.     
 
  It should be noted that insurance is not a substitute for the basic credit
of an issuer, but supplements the existing credit and provides additional se-
curity therefor. Moreover, while insurance coverage for the Municipal Bonds
held by the Fund reduces credit risk by insuring that the Fund will receive
payment of principal and interest, it does not protect against market fluctua-
tions caused by changes in interest rates and other factors.
 
  Financial Guaranty. Financial Guaranty is a wholly-owned subsidiary of FGIC
Corporation, a Delaware holding company. Financial Guaranty, domiciled in the
State of New York, commenced its business of providing insurance and financial
guarantees for a variety of investment instruments in January 1984. FGIC Cor-
poration is a subsidiary of General Electric Capital Corporation. Neither FGIC
Corporation nor General Electric Capital Corporation is obligated to pay the
debts of or the claims against Financial Guaranty.
 
  The information relating to Financial Guaranty contained herein has been
furnished by Financial Guaranty. No representation is made herein as to the
accuracy or adequacy of such information subsequent to the date hereof. The
Fund may purchase insurance from Financial Guaranty or from other insurers.
The use of insurance will result in a lower yield to shareholders of the Fund
than would be the case if non-insured securities were purchased.
 
                    INVESTMENT TECHNIQUES AND RISK FACTORS
 
  U.S. GOVERNMENT SECURITIES. Each Fund may invest in securities issued or
guaranteed as to principal or interest by the U.S. government, its agencies or
instrumentalities. Direct obligations of the U.S. Treasury include bills,
notes and bonds, which principally differ in their interest rates, maturities
and times of issuance. Such securities are backed by the "full faith and cred-
it" of the United States government. Securities issued or guaranteed by agen-
cies or instrumentalities are supported by (i) the full faith and credit of
the United States, such as obligations of the Government National Mortgage As-
sociation ("Ginnie Mae"), the Farmers Home Administration or the Export-Import
Bank; (ii) the limited authority of the issuer to borrow from the U.S. Trea-
sury, such as obligations of the Student Loan Marketing Association, the Fed-
eral Home Loan Mortgage Associa-
 
                                      10
<PAGE>
 
   
tion ("Freddie Mac"), or the Tennessee Valley Authority; and (iii) the author-
ity of the U.S. government to purchase certain obligations of the issuer, such
as obligations of the Federal National Mortgage Association ("Fannie Mae"),
the Federal Farm Credit System or the Federal Home Loan Bank. No assurance can
be given that the U.S. government will provide financial support to its agen-
cies and instrumentalities as described in (ii) and (iii) above, other than as
set forth, since it is not obligated to do so by law. As such, the Fund must
look principally to the agency or instrumentality issuing or guaranteeing the
obligation for ultimate repayment. U.S. government securities also include
certain mortgage-backed securities, described below under "Mortgage-Backed Se-
curities."     
 
  MORTGAGE-BACKED SECURITIES. Each Fund may invest in mortgage-backed securi-
ties, which directly or indirectly provide funds for mortgage loans made to
residential home buyers. These include securities which represent interests in
pools of mortgage loans made by lenders such as commercial banks, savings and
loan institutions, mortgage bankers and others. Pools of mortgage loans are
assembled for sale to investors by various governmental, government-related
and private organizations.
 
  Interests in pools of mortgage-backed securities differ from other forms of
debt securities, which normally provide for periodic payment of interest in
fixed amounts with principal payments at maturity or specified call dates. In-
stead, these securities provide a monthly payment which consists of both
interest and principal payments. In effect, these payments are a "pass-
through" of the monthly payments made by the individual borrowers on their
residential mortgage loans, net of any fees paid to the issuer or guarantor of
such securities. Additional payments are caused by prepayments resulting from
the sale of the underlying residential property, refinancing or foreclosure
(net of fees or costs which may be incurred). In addition, pre-payment of
principal on mortgage-backed securities, which often occurs when interest
rates decline, can significantly change the realized yield of these securi-
ties. Some mortgage-backed securities are described as "modified pass-
through." These securities entitle the holders to receive all interest and
principal payments owned on the mortgages in the pool, net of certain fees,
regardless of whether or not the mortgagors actually make the payments.
 
  The principal government guarantor of mortgage-backed securities is Ginnie
Mae. Ginnie Mae is authorized to guarantee, with the full faith and credit of
the U.S. government, the timely payment of principal and interest on securi-
ties issued by approved institutions such as the FHA or VA and backed by pools
of FHA-insured or VA-guaranteed mortgages.
 
  Residential mortgage loans are pooled by various other governmental or pri-
vate entities, including Freddie Mac. Freddie Mac issues Participation Certif-
icates which represent interests in mortgages from Freddie Mac's national
portfolio. Freddie Mac guarantees the timely payment of interest and ultimate
collection of principal.
 
  Fannie Mae purchases residential mortgages from a list of approved
seller/servicers, which include state and federally-chartered savings and loan
associations, mutual savings banks, commercial banks and credit unions and
mortgage bankers. Pass-through securities issued by Fannie Mae are guaranteed
as to timely payment of principal and interest by Fannie Mae.
 
  Commercial banks, savings and loan institutions, private mortgage insurance
companies, mortgage bankers and other secondary market issuers also create
pass-through pools of mortgage loans and issue fixed-income securities which
are collateralized by mortgage-backed securities issued by Freddie Mac, Fannie
Mae and Ginnie Mae or by pools of conventional mortgages, and are referred to
as "collateralized mortgage obligations" ("CMOs"). Pools created by such non-
governmental issuers and CMOs issued by the pools generally offer a higher
rate of interest than government and government-related pools because there
are no direct or indirect government guarantees of payments in such pools.
However, timely payment of interest and principal of these pools is supported
by various forms of insurance or guarantees, including individual loan, title,
pool and hazard insurance. The insurance and guarantees are issued by govern-
mental entities, private insurers and the mortgage poolers. In the case of
CMOs, timely payment of interest and principal is supported by the government-
related securities which collateralize such obligations or by a pool of con-
ventional mortgages. There can be no assurance that the private insurers can
meet their obligations under the policies.
 
                                      11
<PAGE>
 
   
  The mortgage-backed securities in which the Funds may invest include
stripped mortgage-backed securities. Stripped mortgage-backed securities are
often structured with two classes that receive different proportions of the
interest and principal distributions on a pool of mortgage assets. Stripped
mortgage-backed securities have greater market volatility than other types of
U.S. government securities in which the Funds invest. A common type of
stripped mortgage-backed security has one class receiving some of the interest
and all or most of the principal (the "principal only" class) from the mort-
gage pool, while the other class will receive all or most of the interest (the
"interest only" class). The yield to maturity on an interest only class is ex-
tremely sensitive, not only to changes in prevailing interest rates, but also
to the rate of principal payments, including principal prepayments, on the un-
derlying pool of mortgage assets, and a rapid rate of principal payment may
have a material adverse effect on a Fund's yield. While interest only and
principal only securities are generally regarded as being illiquid, such secu-
rities may be deemed to be liquid if they can be disposed of promptly in the
ordinary course of business at a value reasonably close to that used in the
calculation of the Fund's net asset value per share. Only government interest
only and principal only securities backed by fixed-rate mortgages and deter-
mined to be liquid under guidelines and standards established by the Trustees
may be considered liquid securities not subject to a Fund's limitation on in-
vestments in illiquid securities.     
 
  The Diversified Income Fund, Federal Securities Fund and Government Securi-
ties Fund may also enter into "forward roll" transactions with U.S. government
agencies or financial institutions with respect to the mortgage-backed securi-
ties in which it may invest. A Fund would be required to place cash or liquid
securities in a segregated account with its custodian in an amount equal to
its obligation under the roll; that amount is subject to the limitation on
borrowing described in the Statement of Additional Information.
 
  ASSET-BACKED SECURITIES. Each Fund, other than the Diversified Income Fund,
may invest up to 15% of its net assets in asset-backed securities meeting such
Fund's credit quality restrictions. With respect to Diversified Income, the
Fund may invest in asset-backed securities without regard to the aforemen-
tioned net asset limitation. Asset-backed securities issued by trusts and spe-
cial purpose corporations, are backed by a pool of assets, such as credit card
or automobile loan receivables representing the obligations of a number of
different parties. Corporate asset-backed securities present certain risks.
For instance, in the case of credit card receivables, these securities may not
have the benefit of any security interest in the related collateral. See the
Statement of Additional Information for further information on these securi-
ties.
 
  ZERO-COUPON SECURITIES. The Funds may invest in zero-coupon securities as
follows: (i) the Government Securities Fund, Federal Securities Fund, Diversi-
fied Income Fund and High Income Fund may invest in zero-coupon securities is-
sued by the U.S. Treasury; and, in addition, (ii) the Diversified Income Fund
and High Income Fund may invest in zero-coupon securities issued by both do-
mestic and foreign corporations, and (iii) the Tax Exempt Insured Fund may in-
vest in zero-coupon securities issued by state and local government entities.
Zero-coupon U.S. government securities are: (i) U.S. Treasury notes and bonds
which have been stripped of their unmatured interest coupons and receipts, or
(ii) certificates representing interest in such stripped debt obligations or
coupons. Because a zero-coupon security pays no interest to its holder during
its life or for a substantial period of time, it usually trades at a deep dis-
count from its face or par value and will be subject to greater fluctuations
of market value in response to changing interest rates than debt obligations
of comparable maturities which make current distributions of interest. Because
the Funds accrue taxable income from these securities without receiving cash,
the Funds may be required to sell portfolio securities in order to pay a divi-
dend, depending upon the proportion of shareholders who elect to receive divi-
dends in cash rather than reinvesting dividends in additional shares of the
Funds. Cash distributed or held by the Funds and not reinvested will hinder
the Funds in seeking a high level of current income. Corporate zero-coupon se-
curities are: (i) notes or debentures which do not pay current interest and
are issued at substantial discounts from par value, or (ii) notes or deben-
tures that pay no current interest until a stated date one or more years into
the future, after which the issuer is obligated to pay interest until maturi-
ty, usually at a higher rate than if interest were payable from the date of
issuance and may also make interest payments-in-kind (e.g., with identical ze-
ro-coupon securities). Such corpo-
 
                                      12
<PAGE>
 
rate zero-coupon securities, in addition to the risks identified above, are
subject to the risk of the issuer's failure to pay interest and repay princi-
pal in accordance with the terms of the obligation. The Funds must accrue the
discount or interest on high-yield bonds structured as zero-coupon securities
as income even though it does not receive a corresponding cash interest pay-
ment until the security's maturity or payment date. Municipal zero-coupon se-
curities are: (i) notes or bonds which do not pay current interest and are is-
sued at substantial discounts from par value, or (ii) notes or bonds that pay
no current interest until a stated date one or more years into the future, af-
ter which the securities convert to interest bearing securities, generally on
a semi-annual basis. The Funds must accrue the discount or interest on the
bonds structured as zero-coupon securities as income even though it does not
receive a corresponding cash interest payment until the security's maturity or
payment date.
 
  PARTICIPATION INTERESTS. The Diversified Income Fund and High Income Fund
may acquire participation interests in senior, fully-secured floating rate
loans that are made primarily to U.S. companies (the "borrower"). Such partic-
ipation interests, which may take the form of interests in, or assignments of,
loans, are acquired from banks which have made loans or are members of lending
syndicates. Each Fund's investments in participation interests are subject to
its 10% of net assets limitation on investments in illiquid securities. The
Funds may purchase only those participation interests that mature in one year
or less, or, if maturing in more than one year, that have a floating rate that
is automatically adjusted at least once each year according to a specified
rate for such investments, such as the percentage of a bank's prime rate. Par-
ticipation interests are primarily dependent upon the creditworthiness of the
borrower for payment of interest and principal. Such borrowers may have diffi-
culty making payments and may have senior securities rated as low as "C" by
Moody's or "D" by S&P. In the event the borrower fails to pay scheduled inter-
est or principal payments, a Fund could experience a reduction in its income
and might experience a decline in the net asset value of its shares.
 
  FOREIGN SECURITIES. The Diversified Income Fund and High Income Fund may in-
vest in U.S. dollar-denominated fixed-income securities issued by domestic
corporations in any industry. The Funds may also invest in debt obligations
(which may be denominated in U.S. dollars or in non-U.S. currencies), issued
or guaranteed by foreign corporations, certain supranational entities (such as
the World Bank) and foreign governments (including political subdivisions hav-
ing taxing authority), their agencies or instrumentalities, and debt obliga-
tions issued by U.S. corporations which are either denominated in non-U.S.
currencies or traded in foreign markets (e.g., Eurobonds). The Funds may pur-
chase securities issued by issuers in any country; provided that, the Funds
                                                   -------- ----
may not invest more than 25% of their respective total assets in the securi-
ties issued by entities domiciled in any one foreign country. Investment in
securities or issuers in non-industrialized countries generally involves more
risk and may be considered highly speculative. There is no restriction as to
the size of the issuer. These investments may include debt obligations such as
bonds, debentures and notes (including variable and floating rate instru-
ments), zero-coupon securities and sinking funds and callable bonds. If a bond
held by a Fund is selling at a premium (or discount) and the issuer exercises
a call or makes a mandatory sinking fund payment, the Fund would realize a
loss (or gain) in market value; the income from the reinvestment of the pro-
ceeds would be determined by current market conditions.
 
  The percentage of the Diversified Income Fund's or High Income Fund's total
assets that will be allocated to foreign securities will vary depending on the
relative yields of foreign and U.S. securities, the economies of foreign coun-
tries, the condition of such countries' financial markets, the interest rate
climate of such countries and the relationship of such countries' currency to
the U.S. dollar. These factors are judged on the basis of fundamental economic
criteria (e.g., relative inflation levels and trends, growth rate forecasts,
balance of payments status, and economic policies) as well as technical and
political data. Subsequent foreign currency losses may result in a Fund having
previously distributed more income in a particular period than was available
from investment income, which could result in a return of capital to share-
holders.
 
  The Diversified Income Fund and High Income Fund may each invest in securi-
ties of foreign issuers in the form of American Depositary Receipts (ADRs),
European Depositary Receipts (EDRs) or other similar securities convertible
into securities of
 
                                      13
<PAGE>
 
foreign issuers. These securities may not necessarily be denominated in the
same currency as the securities into which may be converted. Each such Fund
may also invest in securities denominated in European Currency Units (ECUs).
An ECU is a "basket" consisting of specified amounts of currencies of certain
of the twelve member states of the European Community. See "Foreign Securi-
ties" in the Statement of Additional Information for a further discussion of
these types of securities. Securities of foreign issuers that are represented
by ADRs or that are listed on a U.S. securities exchange are not considered
"foreign securities" for purposes of a Fund's 25% limitation on investments in
such securities.
 
  Foreign securities are subject to risks different than those involved in in-
vestment in domestic securities and markets. Foreign investments may be af-
fected favorably or unfavorably by changes in currency rates and exchange-con-
trol regulations and costs will be incurred in connection with conversions be-
tween various currencies. The value of a security may fluctuate as a result of
currency exchange rates in a manner unrelated to the underlying value of the
security. There may be less publicly available information about a foreign
company than about a U.S. company, and foreign companies may not be subject to
uniform accounting, auditing and financial reporting standards and require-
ments comparable to those applicable to U.S. companies. Securities of some
foreign companies may be less liquid or more volatile than securities of U.S.
companies, and foreign brokerage commissions and custodian fees are generally
higher than in the U.S. In addition, there is generally less governmental reg-
ulation of stock exchanges, brokers and listed companies abroad than in the
U.S. Investments in foreign securities may also be subject to other risks,
different from those affecting U.S. investments, including local political or
economic developments, expropriation or nationalization of assets, confisca-
tory taxation and imposition of withholding taxes on income from sources
within such countries.
   
  EURO CONVERSION. Effective January 1, 1999, several European countries will
irrevocably fix their existing national currencies to a new single European
currency unit, the "euro." Certain European investments may be subject to ad-
ditional risks as a result of this conversion. These risks include adverse tax
and accounting consequences, as well as difficulty in processing transactions.
The Adviser is aware of such potential problems and is coordinating efforts to
prevent or alleviate their adverse impact on the Funds. There can be no assur-
ance that a Fund will not suffer any adverse consequences as a result of the
euro conversion.     
 
  ILLIQUID SECURITIES. Each Fund may invest up to 10% of its net assets, de-
termined as of the date of purchase, in illiquid securities including repur-
chase agreements which have a maturity of longer than seven days, securities
with legal or contractual restrictions on resale (restricted securities), and
securities that are not readily marketable in securities markets either within
or outside the United States. Restricted securities that the Board of Trust-
ees, or the Advisor pursuant to guidelines established by the Board of Trust-
ees, has determined to be marketable, such as securities eligible for resale
pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Secu-
rities Act"), or certain private placements of commercial paper issued in re-
liance on an exemption from the Securities Act pursuant to Section 4(2) there-
of, may be deemed to be liquid for purposes of this restriction. To the extent
that, for a period of time, qualified institutional buyers cease purchasing
such restricted securities pursuant to Rule 144A, the Fund's investing in such
securities may have the effect of increasing the level of illiquidity in the
Fund's portfolio during such period. In addition, a repurchase agreement that
by its terms can be liquidated before its nominal fixed-term on seven days or
less notice is regarded as a liquid instrument. See "Illiquid Securities" in
the Statement of Additional Information for a further discussion of invest-
ments in such securities.
 
  SHORT-TERM AND TEMPORARY DEFENSIVE INVESTMENTS. In addition to their primary
investments, each Fund may also invest up to 10% of its total assets in money
market instruments for liquidity purposes (to meet redemptions and expenses).
For temporary defensive purposes, each Fund may invest up to 100% of its total
assets in short-term fixed-income securities, including corporate debt obliga-
tions and money market instruments rated in one of the two highest categories
by a nationally recognized statistical rating organization (or determined by
the Adviser to be of equivalent quality). Money market instruments include se-
curities issued or guaranteed by the U.S. government, its agencies or instru-
mentalities, repurchase agreements, commercial paper, bankers' acceptances and
certificates of deposit. See the Appendix to the Statement of Additional In-
formation for a description of securities ratings.
 
  REPURCHASE AGREEMENTS. Each Fund may enter into repurchase agreements in or-
der to generate in-
 
                                      14
<PAGE>
 
come while providing liquidity. When a Fund acquires a security from a bank or
securities dealer, it may simultaneously enter into a repurchase agreement,
wherein the seller agrees to repurchase the security at a mutually agreed-upon
time (generally within seven days) and price. The repurchase price is in ex-
cess of the purchase price by an amount which reflects an agreed-upon market
rate of return, which is not tied to the coupon rate or maturity of the under-
lying security. Repurchase agreements will be fully collateralized. If, howev-
er, the seller defaults on its obligation to repurchase the underlying securi-
ty, the Fund may incur a loss if the value of the collateral securing the re-
purchase agreement has declined, and may incur disposition costs in connection
with liquidating the collateral. If bankruptcy proceedings are commenced with
respect to the seller, realization of the collateral by the Fund may be de-
layed or limited. There is no limit on the amount of a Fund's net assets that
may be subject to repurchase agreements having a maturity of seven days or
less for temporary defensive purposes.
 
  WHEN-ISSUED AND DELAYED-DELIVERY TRANSACTIONS. Each Fund may purchase or
sell securities on a when-issued or delayed-delivery basis. When-issued or de-
layed-delivery transactions generally involve the purchase or sale of a secu-
rity with payment and delivery at sometime in the future--i.e. beyond normal
settlement. While the Fund will only purchase securities on a when-issued or
delayed-delivery basis with the intention of acquiring the securities, the
Fund may sell the securities before the settlement date, if it is deemed ad-
visable. At the time the Fund makes the commitment to purchase securities on a
when-issued or delayed-delivery basis, the Fund will record the transaction
and thereafter reflect the value, each day, of such security in determining
the net asset value of the Fund. At the time of delivery of the securities,
the value may be more or less than the purchase price. The Fund will maintain
in a segregated account liquid assets having a value equal to or greater than
the Fund's purchase commitments. The Fund will likewise segregate liquid as-
sets in respect of securities sold on a delayed-delivery basis. Subject to
this requirement, each Fund may purchase securities on such basis without lim-
itation.
 
  LOANS OF PORTFOLIO SECURITIES. Each Fund may lend portfolio securities in
amounts up to 33% of its respective total assets to brokers, dealers and other
financial institutions, provided such loans are callable at any time by the
Fund and are at all times secured by cash or equivalent collateral. By lending
its portfolio securities, a Fund will receive income while retaining the secu-
rities' potential for capital appreciation. As with any extensions of credit,
there are risks of delay in recovery and, in some cases, even loss of rights
in the collateral should the borrower of the securities fail financially. How-
ever, these loans of portfolio securities will only be made to firms deemed by
the Adviser to be creditworthy.
 
  LEVERAGE. In seeking to enhance investment performance, the Federal Securi-
ties Fund, Diversified Income Fund and High Income Fund may borrow money for
investment purposes and may each pledge its assets to secure such borrowings.
This is the speculative factor known as leverage. This practice may help a
Fund increase the net asset value of its shares in an amount greater than
would otherwise be the case when the market values of the securities purchased
through borrowing increase. In the event the return on an investment of bor-
rowed monies does not fully recover the costs of such borrowing, the net asset
value of a Fund's shares would be reduced by a greater amount than would oth-
erwise be the case. The effect of leverage will therefore tend to magnify the
gains or losses to a Fund as a result of investing the borrowed monies. During
periods of substantial borrowings, the net asset value of a Fund's shares
would be reduced due to the added expense of interest on borrowed monies. Each
Fund is authorized to borrow and to pledge assets to secure such borrowings,
up to the maximum extent permissible under the 1940 Act (i.e., 50% of its net
assets). The time and extent to which a Fund may employ leverage will be de-
termined by the Adviser in light of changing facts and circumstances, includ-
ing general economic and market conditions, and will be subject to applicable
lending regulations of the Board of Governors of the Federal Reserve Board. A
Fund's policy regarding the use of leverage is fundamental, and may not be
changed without the approval of the shareholders of the respective Fund.
 
  Under the 1940 Act, the value of a Fund's assets less liabilities, other
than borrowings, must be at least three times all of the Fund's borrowings,
including the proposed borrowing. If for any reason the value of a Fund's as-
sets falls below the 1940 Act requirement, the Fund must, within three busi-
ness days, reduce its borrowings to satisfy such requirement. To do this, a
Fund may have to sell a portion of its investments at a time when it may be
disadvantageous to do so.
 
                                      15
<PAGE>
 
  HEDGING AND INCOME ENHANCEMENT STRATEGIES. Each Fund may write covered calls
to enhance income. For hedging purposes as a temporary defensive maneuver,
each Fund may use interest rate futures and stock and bond index futures (to-
gether, "Futures"); forward contracts on foreign currencies; and call and put
options on equity and debt securities, Futures, stock and bond indices and
foreign currencies (all of the foregoing are referred to as "Hedging Instru-
ments"). A call or put may be purchased only if, after such purchase, the
value of all call and put options held by the Fund would not exceed 5% of the
Fund's total assets. A Fund will not use Futures and options on Futures for
speculation. All puts and calls on securities, interest rate futures or stock
and bond index futures or options on such Futures purchased or sold by the
Fund will be listed on a national securities or commodities exchange or on
U.S. over-the-counter markets.
 
  Special Risks of Hedging and Income Enhancement Strategies. Participation in
the options or Futures markets and in currency exchange transactions involves
investment risks and transaction costs to which a Fund would not be subject
absent the use of these strategies. If the Adviser's predictions of movements
in the direction of the securities, foreign currency and interest rate markets
are inaccurate, the adverse consequences to the Fund may leave the Fund in a
worse position than if such strategies were not used. Risks inherent in the
use of options, foreign currency and Futures contracts and options on Futures
contracts include: (1) dependence on the Adviser's ability to correctly pre-
dict movements in the direction of interest rates, securities prices and cur-
rency markets; (2) imperfect correlation between the price of options and
Futures contracts and options thereon and movements in the prices of the secu-
rities or currencies being hedged; (3) the fact that skills needed to use
these strategies are different from those needed to select portfolio securi-
ties; (4) the possible absence of a liquid secondary market for any particular
instrument at any time; (5) the possible need to defer closing out certain
hedged positions to avoid adverse tax consequences; and (6) the possible in-
ability of the Fund to purchase or sell a portfolio security at a time that
otherwise would be favorable for it to do so, or the possible need for the
Fund to sell a portfolio security at a disadvantageous time, due to the need
for the Fund to maintain "cover" or to segregate securities in connection with
hedging transactions. A transaction is "covered" when the Fund owns the secu-
rity subject to the option on such security, or some other security acceptable
for applicable escrow requirements. See the Statement of Additional Informa-
tion for further information concerning income enhancement and hedging strate-
gies and the regulation requirements relating thereto.
 
  HIGH-YIELD/HIGH-RISK SECURITIES. The High Income Fund invests primarily in
high yielding, lower-rated bonds, commonly called "junk bonds." The Diversi-
fied Income Fund may also invest in these securities. Bonds that are rated
"Baa" or lower by Moody's or "BBB" or lower by S&P, or unrated bonds of compa-
rable quality, are generally considered to be high-yield bonds. These high-
yield bonds are subject to greater risks than lower yielding, higher-rated
debt securities.
 
  Risk Factors Applicable to High-Yield/High-Risk Securities. It should be
noted that lower-rated securities are subject to risk factors such as: (a)
vulnerability to economic downturns and changes in interest rates; (b) sensi-
tivity to adverse economic changes and corporate developments; (c) redemption
or call provisions which may be exercised at inopportune times; (d) difficulty
in accurately valuing or disposing of such securities; (e) federal legislation
which could affect the market for such securities; and (f) special adverse tax
consequences associated with investments in certain high-yield, high-risk
bonds (e.g., zero-coupon bonds or pay-in-kind bonds). See "Dividends, Distri-
butions and Taxes."
 
  High-yield bonds, like other bonds, may contain redemption or call provi-
sions. If an issuer exercises these provisions in a declining interest rate
market, the High Income Fund or Diversified Income Fund would have to replace
the security with a lower yielding security, resulting in lower return for in-
vestors. Conversely, a high-yield bond's value will decrease in a rising in-
terest rate market.
 
  There is a thinly traded market for high-yield bonds, and recent market quo-
tations may not be available for some of these bonds. Market quotations are
generally available only from a limited number of dealers and may not repre-
sent firm bids from such dealers or prices for actual sales. As a result, the
Diversified Income Fund and High Income Fund may have difficulty valuing the
high-yield bonds in their portfolios accurately and disposing of these bonds
at the time or price desired.
 
  Ratings assigned by Moody's and S&P to high-yield bonds, like other bonds,
attempt to evaluate the safety of principal and interest payments on those
bonds. However, such ratings do not assess
                                      16
<PAGE>
 
the risk of a decline in the market value of those bonds. In addition, ratings
may fail to reflect recent events in a timely manner and are subject to
change. If a portfolio security's rating is changed, the Adviser will deter-
mine whether the security will be retained based upon the factors the Adviser
considers in acquiring or holding other securities in the portfolio. Invest-
ment in high-yield bonds may make achievement of a Fund's objective more de-
pendent on the Adviser's own credit analysis than is the case for higher-rated
bonds.
 
  Market prices for high-yield bonds tend to be more sensitive than those for
higher-rated securities due to many of the factors described above, including
the credit-worthiness of the issuer, redemption or call provisions, the li-
quidity of the secondary trading market and changes in credit ratings, as well
as interest rate movements and general economic conditions. In addition,
yields on such bonds will fluctuate over time. An economic downturn could se-
verely disrupt the market for high-yield bonds.
 
  The risk of default in payment of principal and interest on high-yield bonds
is significantly greater than with higher-rated debt securities because high-
yield bonds are generally unsecured and are often subordinated to other obli-
gations of the issuer. Further, the issuers of high-yield bonds usually have
high levels of indebtedness and are more sensitive to adverse economic condi-
tions, such as recession or increasing interest rates. Upon a default, bond-
holders may incur additional expenses in seeking recovery.
 
  As a result of all these factors, the net asset value of the High Income
Fund and the Diversified Income Fund, to the extent it invests in high-yield
bonds, is expected to be more volatile than the net asset value of funds which
invest solely in higher-rated debt securities. This volatility may result in
an increased number of redemptions from time to time. High levels of redemp-
tions in turn may cause a fund to sell its portfolio securities at inopportune
times and decrease the asset base upon which expenses can be spread.
 
  FUTURE DEVELOPMENTS. Each Fund may invest in securities and other instru-
ments which do not presently exist but may be developed in the future, pro-
vided that each such investment is consistent with the Fund's investment ob-
jectives, policies and restrictions and is otherwise legally permissible under
federal and state laws. The Prospectus will be
amended or supplemented as appropriate to discuss any such new investments.
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund has adopted certain fundamental policies designed to maintain the
diversity of its portfolio and reduce investment risk. With respect to 75% of
a Fund's total assets, such Fund may not invest more than 5% of such assets in
the securities of any one issuer (other than obligations issued or guaranteed
by the U.S. government, its agencies and instrumentalities) or, with respect
to 100% of a Fund's total assets, purchase more than 10% of an issuer's voting
securities. The High Income Fund may not purchase more than 10% of any class
of an issuer's outstanding securities. A Fund may not purchase securities
(other than obligations issued or guaranteed by the U.S. government, its agen-
cies and instrumentalities) if as a result of such purchase more than 25% of a
Fund's total assets would be invested in any one industry. See the Statement
of Additional Information for information concerning other fundamental poli-
cies.
 
                            MANAGEMENT OF THE TRUST
 
  TRUSTEES. The Trustees of the Trust are responsible for the overall supervi-
sion of the operation of the Trust and each Fund and perform various duties
imposed on trustees of investment companies by the 1940 Act and by The Common-
wealth of Massachusetts.
   
  THE ADVISER. The Adviser selects and manages the investments of each Fund,
provides various administrative services and supervises the Funds' daily busi-
ness affairs, subject to general review by the Trustees. The Adviser is an in-
direct wholly-owned subsidiary of SunAmerica Inc. ("SunAmerica"), an invest-
ment-grade financial services company which, as of May 31, 1998 has over $56
billion in assets. SunAmerica's principal executive offices are located at 1
SunAmerica Center, Century City, Los Angeles, CA 90067-6022. In addition to
serving as adviser to the Funds, the Adviser serves as adviser, manager and/or
administrator for Anchor Pathway Fund, SunAmerica Equity Funds, SunAmerica
Money Market Funds, Inc., Style Select Series, Inc., Anchor Series Trust,
SunAmerica Series Trust and Seasons Series Trust. As of May 31, 1998, the Ad-
viser managed, advised and/or administered assets of approximately over $14.6
billion for investment companies, individuals, pension accounts, and corporate
and trust accounts.     
 
                                      17
<PAGE>
 
  Pursuant to the Investment Advisory and Management Agreement entered into
between the Adviser and the Trust, on behalf of each Fund, each Fund pays the
Adviser a fee, payable monthly, computed daily at the following annual rates:
 
<TABLE>   
<CAPTION>
FUND                                                    FEE
- ----                                                    ---
<S>                                                     <C>
Government Securities Fund and High Income Fund........ .75% of average daily 
                                                        net assets up to $200 
                                                        million; .72% of the  
                                                        next $200 million; and
                                                        .55% of average daily 
                                                        net assets in excess of
                                                        $400 million.          
                                                        
Federal Securities Fund................................ .55% of average daily
                                                        net assets up to $25
                                                        million; .50% of the
                                                        next $25 million; and
                                                        .45% of average daily
                                                        net assets in excess of
                                                        $50 million.

Diversified Income Fund................................ .65% of average daily
                                                        net assets up to $350
                                                        million; and .60% of
                                                        average daily net assets
                                                        in excess of $350
                                                        million.

Tax Exempt Insured Fund................................ .50% of average daily
                                                        net assets up to $350
                                                        million; and .45% of
                                                        average daily net assets
                                                        in excess of $350
                                                        million.
</TABLE>    
   
The advisory fee with respect to Government Securities Fund and High Income
Fund is higher than that paid by most other investment companies. For the fis-
cal year ended March 31, 1998, each Fund paid the Adviser a fee equal to the
following percentage of average daily net assets: Government Securities Fund--
 .74%; Federal Securities Fund-- .53%; Diversified Income Fund--.65%; High In-
come Fund--.75%; and Tax Exempt Insured Fund--.50%. For the same period, the
Class C shares of the High Income Fund were reimbursed 5.37% of the average
daily net assets of the Class.     
 
  The Fixed Income Investment Team is responsible for the portfolio management
of each of the Funds. The Team, which is headed by P. Christopher Leary, is
composed of six portfolio managers and research analysts. Individual members
of the Team may focus more heavily on particular Funds or particular aspects
of the fixed-income markets. Mr. Leary is an Executive Vice President and
Director of Fixed-Income of the Adviser and has been a portfolio manager with
the firm since 1990.
 
  THE DISTRIBUTOR. SunAmerica Capital Services, Inc. (the "Distributor"), an
indirect wholly owned subsidiary of SunAmerica, acts as distributor of the
shares of each Fund pursuant to the Distribution Agreement between the Dis-
tributor and the Trust on behalf of each Fund. The Distributor receives all
initial and deferred sales charges in connection with the sale of Fund shares,
all or a portion of which it may reallow to other broker-dealers. The Distrib-
utor and other broker-dealers pay commissions to salespersons, as well as the
cost of printing and mailing prospectuses to potential investors and of any
advertising expenses incurred by them in connection with their distribution of
Fund shares.
 
  The Distributor, at its expense, may from time to time, provide additional
compensation to broker-dealers (including in some instances affiliates of the
Distributor) in connection with sales of shares of the Funds. Such compensa-
tion may include (i) full reallowance of the front-end sales charge on Class A
shares; (ii) additional compensation with respect to the sale of Class A,
Class B or Class C shares; or (iii) financial assistance to broker-dealers in
connection with conferences, sales or training programs for their employees,
seminars for the public, advertising campaigns regarding one or more of the
Funds, and/or other broker-dealer-sponsored special events. In some instances,
this compensation will be made available only to certain broker-dealers whose
representatives have sold a significant amount of shares of the Funds. Compen-
sation may also include payment for travel expenses, including lodging, in-
curred in connection with trips taken by invited registered representatives
for meetings or seminars of a business nature. In addition, the following
types of non-cash compensation may be offered through sales contests: (i)
travel mileage on major air carriers; (ii) tickets for entertainment events
(such as concerts or sporting events); or (iii) merchandise (such as clothing,
trophies, clocks, pens or other electronic equipment). Broker-dealers may not
use sales of the Funds' shares to qualify for this compensation to the extent
receipt of such compensation may be prohibited by the laws of any state or any
self-regulatory agency, such as, for example, the National Association of Se-
curities Dealers, Inc. Dealers who receive bonuses or other incentives may be
deemed to be underwriters under the Securities Act.
 
  Certain laws and regulations limit the ability of banks and other depository
institutions to underwrite and distribute securities. However, in the opinion
of the Adviser based upon the advice of counsel,
 
                                      18
<PAGE>
 
these laws and regulations do not prohibit such depository institutions from
providing other services to investment companies of the type contemplated by
the Distribution Plans (as described below). The Trustees will consider appro-
priate modifications to the operations of the Funds, including discontinuance
of payments under the Distribution Plans to banks and other depository insti-
tutions, in the event such institutions can no longer provide the services
called for under their agreements. Banks and other financial services firms
may be subject to various state laws regarding services described, and may be
required to register as dealers pursuant to state laws.
 
  DISTRIBUTION PLANS. Rule 12b-1 under the 1940 Act permits an investment com-
pany, directly or indirectly, to pay expenses associated with the distribution
of its shares ("distribution expenses") in accordance with a plan adopted by
the investment company's board of directors and approved by its shareholders.
Pursuant to such rule, the Trustees and the shareholders of each class of
shares of each Fund have adopted Distribution Plans hereinafter referred to as
the "Class A Plan," the "Class B Plan" and the "Class C Plan," and collec-
tively as the "Distribution Plans." In adopting each Distribution Plan, the
Trustees determined that there was a reasonable likelihood that each such Plan
would benefit the Trust and the shareholders of the respective class. The
sales charge and distribution fees of a particular class will not be used to
subsidize the sale of shares of any other class.
 
  Under the Class A Plan, the Distributor may receive payments from a Fund at
an annual rate of up to 0.10% of average daily net assets of such Fund's Class
A shares to compensate the Distributor and certain securities firms for pro-
viding sales and promotional activities for distributing that class of shares.
Under the Class B and Class C Plans, the Distributor may receive payments from
a Fund at the annual rate of up to 0.75% of the average daily net assets of
such Fund's Class B and Class C shares, respectively, to compensate the Dis-
tributor and certain securities firms for providing sales and promotional ac-
tivities for distributing that class of shares. The distribution costs for
which the Distributor may be reimbursed out of such distribution fees include
fees paid to broker-dealers that have sold Fund shares, commissions and other
expenses, such as those incurred for sales literature, prospectus printing and
distribution and compensation to wholesalers. It is possible that in any given
year, the amount paid to the Distributor under one or more of the Distribution
Plans may exceed the Distributor's distribution costs as described above. The
Distribution Plans provide that each class of shares of each Fund may also pay
the Distributor an account maintenance and service fee of up to 0.25% of the
aggregate average daily net assets of such class of shares for payments to
broker-dealers for providing continuing account maintenance. In this regard,
some payments are used to compensate broker-dealers with account maintenance
and service fees in an amount up to 0.25% per year of the assets maintained in
a Fund by their customers.
   
  For the fiscal year ended March 31, 1998, under the Class A Plan, each Fund
paid the Distributor a fee equal to the following percentages of average daily
net assets: Government Securities Fund--.35%; Federal Securities Fund--.35%;
Diversified Income Fund--.35%; High Income Fund--.35%; and Tax Exempt Insured
Fund--.35%. For the same period, under the Class B Plan, each Fund paid the
Distributor a fee equal to the following percentages of average daily net as-
sets: Government Securities Fund--1.00%; Federal Securities Fund--1.00%; Di-
versified Income Fund--1.00%; High Income Fund--1.00%; and Tax Exempt Insured
Fund--1.00%. For the same period, under the Class C Plan, the High Income Fund
paid the Distributor a fee equal to 1.00% of average daily net assets.     
 
  THE ADMINISTRATOR. The Trust has entered into a Service Agreement under the
terms of which SunAmerica Fund Services, Inc. ("SAFS"), an indirect wholly
owned subsidiary of SunAmerica, assists the Transfer Agent in providing share-
holder services. Pursuant to the Service Agreement, as compensation for serv-
ices rendered, SAFS receives a fee from the Trust, calculated and payable
monthly, at an annual rate of 0.22% of average daily net assets. See the
Statement of Additional Information for further information.
 
                              PURCHASE OF SHARES
 
  GENERAL. Shares of each of the Funds are sold at the respective net asset
value next calculated after receipt of a purchase order, plus a sales charge
which, at the election of the investor, may be imposed either (i) at the time
of purchase (Class A shares), or (ii) on a deferred basis (Class B and Class C
shares and certain Class A shares).
 
                                      19
<PAGE>
 
  The minimum initial investment in each Fund is $500 and the minimum subse-
quent investment is $100. However, for (i) wrap or certain other advisory ac-
counts for the benefit of clients of broker-dealers, financial institutions,
registered investment advisers or financial planners adhering to certain stan-
dards established by the Distributor, and (ii) Individual Retirement Accounts
("IRAs"), Keogh Plan accounts and accounts for other qualified plans, the min-
imum initial investment is $250 and the minimum subsequent investment is $25.
The decision as to which class is most beneficial to an investor depends on
the amount and intended length of the investment. Investors making large in-
vestments, qualifying for a reduced initial sales charge, might consider Class
A shares because there is a lower distribution fee than Class B and Class C
shares. Investors making small investments might consider Class B and Class C
shares because 100% of the purchase price is invested immediately. Sharehold-
ers who purchase $1,000,000 or more of shares of the Funds should only pur-
chase Class A shares. Investors should consider the CDSC period and any con-
version rights in the context of their investment time frame. For example,
while Class C shares have a shorter CDSC period than Class B shares, Class C
shares do not have a conversion feature and, therefore, are subject to an on-
going distribution fee. Accordingly, Class B shares may be more appropriate
than Class C shares for investors with a longer term investment time frame.
Dealers may receive different levels of compensation depending on which class
of shares they sell.
 
  Upon making an investment in shares of a Fund, an open account will be es-
tablished under which shares of the applicable Fund and additional shares ac-
quired through reinvestment of dividends and distributions will be held for
each shareholder's account by State Street Bank and Trust Company ("State
Street") and its affiliate, National Financial Data Services ("NFDS") (collec-
tively, the "Transfer Agent"). Shareholders will not be issued certificates
for their shares unless they specifically so request in writing. Shareholders
receive regular statements from the Transfer Agent that report each transac-
tion affecting their accounts. Further information may be obtained by calling
Shareholder/Dealer Services at (800) 858-8850.
 
  CLASS A SHARES. Class A shares are offered at net asset value plus an ini-
tial sales charge, which varies with the size of the purchase as follows:
 
<TABLE>
<CAPTION>
                                                                      CONCESSION
                                                      SALES CHARGE    TO DEALERS
                                                    ----------------- ----------
                                                      % OF   % OF NET    % OF
                                                    OFFERING  AMOUNT   OFFERING
SIZE OF PURCHASE                                     PRICE   INVESTED   PRICE
- ----------------                                    -------- -------- ----------
<S>                                                 <C>      <C>      <C>
Less than $100,000.................................  4.75%    4.99%     4.00%
$100,000 but less than $250,000....................  3.75%    3.90%     3.00%
$250,000 but less than $500,000....................  3.00%    3.09%     2.25%
$500,000 but less than $1,000,000..................  2.10%    2.15%     1.35%
$1,000,000 or more.................................   NONE     NONE   see below
</TABLE>
   
  No sales charge is payable at the time of purchase on investments of $1
million or more. In addition, subject to the conditions listed below, shares
may be purchased at net asset value, without payment of a sales charge, by
employee benefit plans qualified under Sections 401 or 457 of the Internal
Revenue Code of 1986, as amended (the "Code"), or employee benefit plans
created pursuant to Section 403(b) of the Code and sponsored by nonprofit
organizations defined under Section 501(c)(3) of the Code (collectively, the
"Plans"). A Plan will qualify for purchases at net asset value, provided that,
                                                                -------- ----
(a) the initial amount invested in one or more of the Funds (or in combination
with the shares of other funds in the SunAmerica Family of Mutual Funds) is at
least $1,000,000, (b) the sponsor signs a $1,000,000 Letter of Intent, (c)
such shares are purchased by an employer-sponsored plan with at least 100
eligible employees, or (d) the purchases are by trustees or other fiduciaries
for certain employer-sponsored plans, the trustee, fiduciary or administrator
for which has an agreement with the Distributor with respect to such
purchases, and all such transactions for the plan are executed through a
single omnibus account.     
   
  Nevertheless, the Distributor will pay a commission to any dealer who initi-
ates or is responsible for such an investment, in the amount of 1.00% of the
amount invested. Redemptions of such shares within the twelve months following
their purchase will be subject to a CDSC at the rate of 1.00% of the lesser of
the net asset value of the shares being redeemed (exclusive of reinvested div-
idends and distributions) or the total cost of such shares. This CDSC is paid
to the Distributor. Redemptions of such shares held longer than twelve months
would not be subject to a CDSC. However, one-half of the commission paid, with
respect to such a purchase, is subject to forfeiture by the dealer in the
event the     
 
                                      20
<PAGE>
 
redemption occurs during the second year from the date of purchase. In deter-
mining whether a deferred sales charge is payable, it is assumed that shares
purchased with reinvested dividends and distributions and then other shares
held the longest are redeemed first.
 
  To the extent that sales are made for personal investment purposes, the
sales charge is waived as to Class A shares purchased by current or retired
officers, directors and other full-time employees of SunAmerica and its affil-
iates, as well as members of the selling group and family members of the fore-
going. In addition, the sales charge is waived with respect to shares pur-
chased by wrap or certain other advisory accounts for the benefit of clients
of broker-dealers, financial institutions, registered investment advisers or
financial planners adhering to certain standards established by the Distribu-
tor. Shares purchased under this waiver are subject to certain limitations de-
scribed in the Statement of Additional Information. Complete details concern-
ing how an investor may purchase shares at reduced sales charges may be ob-
tained by contacting Shareholder/Dealer Services at (800) 858-8850.
 
  There are certain special purchase plans for Class A shares which can reduce
the amount of the initial sales charge to investors in the Funds. For more in-
formation about "Rights of Accumulation," the "Letter of Intent," "Combined
Purchase Privilege," "Reduced Sales Charges for Group Purchases" and the "Net
Asset Value Transfer Program," see the Statement of Additional Information.
   
  CLASS B SHARES. Class B shares are offered at net asset value. Certain re-
demptions of Class B shares within the first six years of the date of purchase
are subject to a CDSC. The charge is assessed on an amount equal to the lesser
of the then-current market value or the purchase price of the shares being re-
deemed. No charge is assessed on shares derived from reinvestment of dividends
or capital gains distributions. In determining whether the CDSC is applicable
to a redemption, the calculation is determined in the manner that results in
the lowest possible rate being charged. Therefore, it is assumed that the re-
demption is first of any shares of a class other than Class B that are not
themselves subject to a CDSC, second of any shares in the shareholder's Fund
account that are not subject to a CDSC (i.e., shares representing reinvested
dividends and distributions), third of shares held for more than six years and
fourth of shares held the longest during the six-year period. The CDSC will
not be applied to dollar amounts representing an increase in the net asset
value of the shares being redeemed since the time of purchase of such redeemed
shares. The amount of the CDSC, if any, will vary depending on the number of
years from the time of payment for the purchase of Fund shares until the time
of redemption of such shares. Solely for purposes of determining the number of
years from the time of any payment for the purchase of shares, all payments
during a month are aggregated and deemed to have been made on the first day of
the month. The following table sets forth the rates of the CDSC.     
 
<TABLE>
<CAPTION>
                                                       CONTINGENT DEFERRED SALES
                                                       CHARGE AS A PERCENTAGE OF
YEAR SINCE PURCHASE                                       DOLLARS INVESTED OR
PAYMENT WAS MADE                                          REDEMPTION PROCEEDS
- -------------------                                    -------------------------
<S>                                                    <C>
First.................................................              4%
Second................................................              4%
Third.................................................              3%
Fourth................................................              3%
Fifth.................................................              2%
Sixth.................................................              1%
Seventh and thereafter................................              0%
</TABLE>
 
  Shareholders of a Fund that acquired their Class B shares pursuant to a re-
organization effected with another SunAmerica mutual fund will remain subject
to the terms of the CDSC in effect for the previous fund at the time of such
reorganization. For additional information, see "Additional Information Re-
garding Purchase of Shares" in the Statement of Additional Information.
   
  Conversion Feature. Class B shares (including a pro rata portion of the
Class B shares purchased through the reinvestment of dividends and distribu-
tions) will convert automatically to Class A shares on the first business day
of the month following the seventh anniversary of the issuance of such Class B
shares. Subsequent to the conversion of a Class B share to a Class A share,
such share will no longer be subject to the higher distribution fee of Class B
shares. Such conversion will be on the basis of the relative net asset values
of Class B and Class A shares, without the imposition of any sales load, fee
or charge.     
 
  CLASS C SHARES. Class C shares are offered at net asset value. Certain re-
demptions of Class C shares within the first year of the date of purchase are
subject to a CDSC of 1%. The method for calculating any such CDSC will be the
same method
 
                                      21
<PAGE>
 
used for calculating the CDSC for Class B shares. See "Class B Shares" above.
 
  WAIVER OF CDSC. The CDSC applicable to Class B and Class C shares will be
waived, subject to certain conditions, in connection with redemptions which
are: (a) requested within one year of the death of the shareholder of an indi-
vidual account or of a joint tenant where the surviving joint tenant is the
deceased's spouse; (b) requested within one year after the shareholder of an
individual account or a joint tenant on a spousal joint tenant account becomes
disabled; (c) taxable distributions or loans to participants made by qualified
retirement plans or retirement accounts (not including rollovers) for which
the Adviser serves as fiduciary (e.g., prepares all necessary tax reporting
documents); provided that, in the case of a taxable distribution, the plan
            -------- ----
participant or accountholder has attained the age of 59 1/2 at the time the
redemption is made; (d) made pursuant to a Systematic Withdrawal Plan up to a
maximum amount of 12% per year from a shareholder account based on the value
of the account at the time the Plan is established, provided, however, that
all dividends and capital gains distributions are reinvested in Fund shares;
and (e) made of shares in accounts consisting of assets which were originally
individually managed by the Adviser and had paid an investment advisory fee to
the Adviser. See the Statement of Additional Information for further informa-
tion concerning conditions with respect to (a) and (b) above. For information
on the waiver of the CDSC, contact Shareholder/Dealer services at (800)
858-8850.
 
  Other CDSC Information. For Federal income tax purposes, the amount of the
CDSC will reduce the amount realized on the redemption of shares, while
reducing gain or increasing loss. For information on the imposition and waiver
of the CDSC contact Shareholder/Dealer Services at (800) 858-8850.
   
  ASSET PROTECTION PLAN (OPTIONAL). Anchor National Life Insurance Company
(the "Life Company"), an affiliate of the Adviser and the Distributor, offers
an Asset Protection Plan to certain investors in the Funds. The benefits of
this optional coverage payable at death will be related to the amounts paid to
purchase Fund shares and to the value of the Fund shares held for the benefit
of the insured persons. However, to the extent such purchased shares are
redeemed prior to death, coverage with respect to such shares will terminate.
       
  Purchasers of the Asset Protection Plan are required to authorized periodic
redemptions of Fund shares to pay the premiums for such coverage. Such
redemptions will not be subject to CDSCs, but will have the same tax
consequences as any other Fund redemptions.     
   
  The Asset Protection Plan will be available to eligible persons who enroll
for the coverage within a limited time period after shares in any Fund are
initially purchased or transferred. In addition, coverage cannot be made
available unless the Life Company knows for whose benefit shares are
purchased. For instance, coverage cannot be made available for shares
registered in the name of your broker unless the broker provides the Life
Company with information regarding the beneficial owners of such shares. In
addition, coverage is available only to shares purchased on behalf of natural
persons under the age of 75 years; coverage is not available with respect to
shares purchased for a retirement account. Other restrictions on the coverage
apply. This coverage may not be available in all states and may be subject to
additional restrictions or limitations. Purchasers of shares should also make
themselves familiar with the impact on the Asset Protection Plan coverage of
purchasing additional shares, reinvestment of dividends and capital gains
distributions and redemptions.     
   
  Please call (800) 858-8850 for more information, including the cost of the
Asset Protection Plan option.     
 
  ADDITIONAL PURCHASE INFORMATION. All purchases are confirmed to each share-
holder. The Trust and Distributor reserve the right to reject any purchase or-
der and may at any time discontinue the sale of any class of shares of any
Fund. Share certificates are issued upon written request, but no certificate
is issued for fractional shares.
 
  Shares of the Funds may be purchased through the Distributor or SAFS, by
check or federal funds wire and through a dollar cost averaging program.
Checks should be made payable to the specific Fund or to "SunAmerica Funds".
If the payment is for a retirement plan account for which the Adviser serves
as fiduciary, please indicate on the check that payment is for such an ac-
count. Payments to open new
 
                                      22
<PAGE>
 
accounts should be mailed to SunAmerica Fund Services, Inc., Mutual Fund Oper-
ations, The SunAmerica Center, 733 Third Avenue, New York, New York 10017-
3204, together with a completed New Account Application. Payment for subse-
quent purchases should be mailed to SunAmerica Fund Services, Inc., c/o NFDS,
P.O. Box 419373, Kansas City, Missouri 64141-6373 and the shareholder's Fund
account number should appear on the check. For fiduciary retirement plan ac-
counts, both initial and subsequent purchases should be mailed to SunAmerica
Fund Services, Inc., Mutual Fund Operations, The SunAmerica Center, 733 Third
Avenue, New York, New York 10017-3204. SAFS reserves the right to reject any
check made payable other than in the manner indicated above. Under certain
circumstances, a Fund will accept a multi-party check (e.g., a check made pay-
able to the shareholder by another party and then endorsed by the shareholder
to the Fund in payment for the purchase of shares); however, the processing of
such a check may be subject to a delay. The Funds do not verify the authentic-
ity of the endorsement of such multi-party check, and acceptance of the check
by a Fund should not be considered verification thereof. Neither the Funds nor
their affiliates will be held liable for any losses incurred as a result of a
fraudulent endorsement. Shares will be priced at the net asset value next de-
termined after the order is placed with the Distributor or SAFS. See "Addi-
tional Information Regarding Purchase of Shares" in the Statement of Addi-
tional Information for more information regarding these services, the proce-
dures involved and when orders are deemed to be placed.
 
                             REDEMPTION OF SHARES
   
  Shares of any Fund may be redeemed at any time at their net asset value next
determined, less any applicable CDSC, after receipt by the Fund of a redemp-
tion request in proper form. Any capital gain or loss realized by a share-
holder upon any redemption of shares generally must be recognized for Federal
income tax purposes. See "Dividends, Distributions and Taxes."     
 
  GENERAL. Normally payment is made by check mailed on the next business day
for shares redeemed, but in any event, payment is made by check mailed within
seven days after receipt by the Transfer Agent of share certificates or of a
redemption request, or both, in proper form. Under unusual circumstances, the
Funds may suspend repurchases or postpone payment for up to seven days or
longer, as permitted by the Federal securities laws.
 
  REGULAR REDEMPTION. Shareholders may redeem their shares by sending a writ-
ten request to SAFS, Mutual Fund Operations, The SunAmerica Center, 733 Third
Avenue, New York, NY 10017-3204. Requests for redemption of shares with a
value of less than $100,000 will be made by check payable to the sharehold-
er(s) and mailed to the address of record. All written requests for redemp-
tions of shares with a value of $100,000 or more, or those mailed to an ad-
dress other than the address of record, must be endorsed by the shareholder(s)
with signature(s) guaranteed by an "eligible guarantor institution" which in-
cludes: banks, brokers, dealers, credit unions, securities and exchange asso-
ciations, clearing agencies and savings associations. Guarantees must be
signed by an authorized signatory of the eligible guarantor and the words
"Signature Guaranteed" must appear with the signature. Signatures guaranteed
by notaries will not be accepted. SAFS may request further documentation from
corporations, executors, administrators, trustees or guardians.
 
  REPURCHASE THROUGH DISTRIBUTOR. The Distributor is authorized, as agent for
the Funds, to offer to repurchase shares presented by telephone to the Dis-
tributor by investment dealers. Orders received by dealers must be at least
$500. The repurchase price is the net asset value per share of the applicable
class of shares of a Fund next-determined after the repurchase order is re-
ceived, less any applicable CDSC. Repurchase orders received by the Distribu-
tor after the Fund's close of business, will be priced based on the next busi-
ness day's close. Dealers may charge for their services in connection with the
repurchase, but neither the Funds nor the Distributor imposes any charge. The
offer to repurchase may be suspended at any time, as described below.
 
  TELEPHONE REDEMPTION. The Trust accepts telephone requests for redemption of
shares with a value of less than $100,000. The proceeds of a telephone redemp-
tion may be sent by check payable to the shareholder(s) and mailed to the ad-
dress of record, by wire to the shareholder's bank account as set forth in the
New Account Application Form or in a subsequent written authorization. Share-
holders util-
 
                                      23
<PAGE>
 
izing the redemption through the electronic funds transfer method will incur a
$15.00 transaction fee. The Trust will employ reasonable procedures to confirm
that instructions communicated by telephone are genuine. Failure to do so may
result in liability to the Trust for losses incurred due to unauthorized or
fraudulent telephone instructions. Such procedures include, but are not lim-
ited to, requiring some form of personal identification prior to acting upon
instructions received by telephone and/or tape recording of telephone instruc-
tions.
   
  A shareholder making a telephone redemption should call Shareholder/Dealer
Services at (800) 858-8850, and state (i) the name of the shareholder(s) ap-
pearing on the Fund's records, (ii) his or her account number with the Fund,
(iii) the name of the Fund, (iv) the amount to be redeemed, and (v) the name
of the person(s) requesting the redemption. The Trust reserves the right to
terminate or modify the telephone redemption service at any time. During peri-
ods of unusual market changes and shareholder activity, you may experience de-
lays in contacting Shareholder/Dealer Services by telephone. In this event,
you may wish to submit a written redemption request, as described above, or
contact your investment representative.     
 
  SYSTEMATIC WITHDRAWAL PLAN. Shareholders who have invested at least $5,000
in any of the Funds may provide for the periodic payment from their account
pursuant to the Systematic Withdrawal Plan. At the shareholder's election,
such payment may be made directly to the shareholder or to a third party on a
monthly, quarterly, semi-annual or annual basis. The minimum periodic payment
is $50. Maintenance of a withdrawal plan concurrently with purchases of addi-
tional shares may be disadvantageous to a shareholder because of the sales
charge applicable to such purchases. Shareholders who have been issued share
certificates will not be eligible to participate in the Systematic Withdrawal
Plan and will have to comply with certain additional procedures in order to
redeem shares. Further information may be obtained by calling
Shareholder/Dealer Services at (800) 858-8850.
 
  OTHER REDEMPTION INFORMATION. At various times, a Fund may be requested to
redeem shares for which it has not yet received good payment. A Fund may delay
or cause to be delayed the mailing of a redemption check until such time as
good payment (e.g., cash or certified check drawn on a United States bank) has
been collected for the purchase of such shares, which will not exceed 15 days.
 
  Because of the high cost of maintaining smaller shareholder accounts, the
Funds may redeem, on at least 60 days' written notice and without shareholder
consent, any account that, due to a shareholder redemption and not to market
fluctuation of the account's value, has a net asset value of less than $500
($250 for retirement plan accounts), as of the close of business on the day
preceding such notice, unless such shareholder increases the account balance
to at least $500 during such 60-day period. In the alternative, the applicable
Fund may impose a $2.00 monthly charge on accounts below the minimum account
size.
 
  If a shareholder redeems shares of any class of a Fund and then within one
year from the date of redemption decides the shares should not have been re-
deemed, the shareholder may use all or any part of the redemption proceeds to
reinstate, free of sales charges (Class A shares) and with the crediting of
any CDSC paid with respect to such reinstated shares at the time of redemption
(Class B and Class C shares), all or any part of the redemption proceeds in
shares of the Fund at the then-current net asset value. Reinstatement may af-
fect the tax status of the prior redemption.
 
                              EXCHANGE PRIVILEGE
   
  GENERAL. Shareholders in any of the Funds may exchange their shares for the
same class of shares of any other Fund or other funds in the SunAmerica Family
of Mutual Funds that offer such class at the respective net asset value per
share. Additionally, Class C shareholders of a Fund may exchange their shares
for Class II shares of another fund in the SunAmerica Family of Mutual Funds.
Before making an exchange, a shareholder should obtain and review the prospec-
tus of the fund whose shares are being acquired. All exchanges are subject to
applicable minimum initial investment requirements and can only be effected if
the shares to be acquired are qualified for sale in the state in which the
shareholder resides. Exchanges of shares generally will constitute a taxable
transaction except for IRAs, Keogh Plans and other qualified or tax-exempt ac-
counts. The exchange privilege may be terminated     
 
                                      24
<PAGE>
 
or modified upon 60 days' written notice. Further information about the ex-
change privilege may be obtained by calling Shareholder/Dealer Services at
(800) 858-8850.
 
  If a shareholder acquires Class A shares through an exchange from another
fund in the SunAmerica Family of Mutual Funds where the original purchase of
such fund's Class A shares was not subject to an initial sales charge because
the purchase was in excess of $1 million, such shareholder will remain subject
to the 1% CDSC, if any, applicable to such redemptions. In such event, the pe-
riod for which the original shares were held prior to the exchange will be
"tacked" with the holding period of the shares acquired in the exchange for
purposes of determining whether the 1% CDSC is applicable upon a redemption of
any of such shares.
 
  A shareholder who acquires Class B or Class C shares through an exchange
from another fund in the SunAmerica Family of Mutual Funds will retain liabil-
ity for any deferred sales charge which is outstanding on the date of the ex-
change. In such event, the period for which the original shares were held
prior to the exchange will be "tacked" with the holding period of the shares
acquired in the exchange for purposes of determining what, if any, CDSC is ap-
plicable upon a redemption of any of such shares.
 
  RESTRICTIONS ON EXCHANGES. Because excessive trading (including short-term
"market timing" trading) can hurt a Fund's performance, each Fund may refuse
any exchange sell order (i) if it appears to be a "market timing" transaction
involving a significant portion of a Fund's assets or (ii) from any share-
holder account if previous use of the exchange privilege is considered exces-
sive. Accounts under common ownership or control, including, but not limited
to, those with the same taxpayer identification number and those administered
so as to redeem or purchase shares based upon certain predetermined market in-
dicators, will be considered one account for this purpose.
 
  In addition, a Fund reserves the right to refuse any exchange purchase order
if, in the judgment of the Adviser, the Fund would be unable to invest effec-
tively in accordance with its investment objective and policies, or would oth-
erwise potentially be adversely affected. A shareholder's purchase exchange
may be restricted or refused if the Fund receives or anticipates simultaneous
orders affecting significant portions of the Fund's assets. In particular, a
pattern of exchanges that coincide with a "market timing" strategy may be dis-
ruptive to the Fund and may therefore be refused.
   
  Finally, as indicated under "Purchase of Shares," the Fund and the Distribu-
tor reserve the right to refuse any order for the purchase of shares.     
 
                PORTFOLIO TRANSACTIONS, BROKERAGE AND TURNOVER
 
  The Adviser is responsible for decisions to buy and sell securities for the
Funds, selection of broker-dealers and negotiations of commission rates. In
the over-the-counter market, securities are generally traded on a "net" basis
with dealers acting as principal for their own accounts without a stated com-
mission (although the price of the security usually includes a profit to the
dealer). In underwritten offerings, securities are purchased at a fixed price
which includes an underwriter's concession or discount. On occasion, certain
money market securities may be purchased directly from an issuer, in which
case no commissions or discounts are paid.
 
  As a general matter, the Adviser selects broker-dealers which, in its best
judgment, provide prompt and reliable execution at favorable security prices
and reasonable commission rates. The Adviser may select broker-dealers which
provide it with research services and may cause a Fund to pay such broker-
dealers commissions which exceed those which other broker-dealers may have
charged, if in the Adviser's view the commissions are reasonable in relation
to the value of the brokerage and/or research services provided by the broker-
dealer. Brokerage arrangements may take into account the distribution of Fund
shares by broker-dealers, subject to best price and execution. The Adviser may
effect portfolio transactions through an affiliated broker-dealer, acting as
agent and not as principal, in accordance with Rule 17e-1 under the 1940 Act
and other applicable securities laws.
 
  Each Fund has no limitation regarding its policy with respect to portfolio
turnover. The portfolio turnover rate is calculated by dividing the lesser of
sales or purchases of portfolio securities, excluding short-term securities,
by the average monthly value of the Fund's long-term portfolio securities.
High
 
                                      25
<PAGE>
 
portfolio turnover involves correspondingly greater brokerage commissions and
other transaction costs which will be borne directly by the Fund. In addition,
high portfolio turnover may result in short-term capital gains, which, when
distributed to shareholders, are treated as ordinary income.
 
                       DETERMINATION OF NET ASSET VALUE
   
   Each Fund is open for business on any day the New York Stock Exchange
("NYSE") is open for regular trading. Shares are valued each day as of the
close of regular trading on the NYSE (generally, 4:00 p.m. Eastern time). Each
Fund calculates the net asset value of each class of its shares separately by
dividing the total value of each class's net assets by the shares outstanding
of each class. Investments for which market quotations are readily available
are valued at market as described in the Statement of Additional Information.
All other securities and assets for which market quotations are not readily
available are valued at fair value following procedures approved by the Trust-
ees. Short-term investments that mature in less than 60 days are valued at am-
ortized cost if their original maturity was 60 days or less, or by amortizing
their value on the 61st day prior to maturity, if their original term exceeds
60 days (unless the Trustees determine that amortized cost value does not rep-
resent fair value, in which case, fair value will be determined as described
above). For a complete description of the procedures involved in valuing vari-
ous Fund assets, see the Statement of Additional Information.     
 
                               PERFORMANCE DATA
 
  Each Fund may advertise performance data that reflects its yield or total
investment return. A brief summary of the computations is provided below and a
detailed discussion is in the Statement of Additional Information. Both yield
and total return figures are based on historical earnings and are not intended
to indicate future performance.
 
  Yield will be calculated based on a 30-day (or one month) period ended on
the date of the applicable Fund's most recent balance sheet and for other such
periods, as deemed appropriate. The net investment income per share earned
during the period will be divided by the maximum offering price per share on
the last day of the period and annualized to obtain the yield. For purposes of
calculating yields, net income is determined by a standard formula prescribed
by the Securities and Exchange Commission to facilitate comparison with yields
quoted by other mutual funds.
 
  Total return performance data may be advertised by each Fund. The average
annual total return may be calculated for one-, five- and ten-year periods or
for the lesser period since inception. These performance data represent the
average annual percentage changes of a hypothetical $1,000 investment and as-
sumes the reinvestment of all dividends and distributions and includes sales
charges and recurring fees that are charged to shareholder accounts. A Fund's
advertisements may also reflect total return performance data calculated by
means of cumulative, aggregate, average, year-to-date, or other total return
figures. Further, the Fund may advertise total return performance for periods
of time in addition to those noted above.
 
  Although expenses for Class B and Class C shares may be higher than those
for Class A shares, the performance of Class B and Class C shares may be
higher than the performance of Class A shares after giving effect to the im-
pact of the sales charges and 12b-1 fees applicable to each class of shares.
 
                      DIVIDENDS, DISTRIBUTIONS AND TAXES
 
  DIVIDENDS AND DISTRIBUTIONS. Dividends from net investment income are de-
clared daily and paid monthly. Dividends are paid on or about the fifteenth
day of the month. Dividends and distributions generally are taxable in the
year in which they are paid, except any dividends paid in January which were
declared in the previous calendar quarter will be treated as paid in December
of the previous year. Dividends and distributions are paid in additional
shares based on the next determined net asset value, unless the shareholder
elects in writing, not less than five business days prior to the payment date,
to receive amounts in excess of $10 in cash.
 
  In addition to having the dividends and distributions of a Fund reinvested
in shares of such Fund, a shareholder may, if he or she so elects on the New
 
                                      26
<PAGE>
 
Account Application Form, have dividends and distributions invested in the
same class of shares of any other SunAmerica Mutual Fund at the then-current
net asset value of such Fund(s).
 
  The excess of net realized capital gains from the sale or disposition of as-
sets held for more than 12 months over net capital losses, if any, will be
distributed to the shareholders annually. Each Fund's policy is to offset any
prior year's capital loss carry forward against any realized capital gains,
and accordingly, no distribution of capital gains will be made until gains
have been realized in excess of any such loss carry forward.
 
  TAXES. Each Fund is qualified and intends to continue to qualify and elect
to be taxed as a regulated investment company under the Code. While so quali-
fied, the Trust and each of the Funds will not be subject to U.S. Federal in-
come tax on the portion of its investment company taxable income and net capi-
tal gains distributed to its shareholders.
 
  For Federal income tax purposes, dividends of net investment income and dis-
tributions of any net realized short-term capital gain, whether paid in cash
or reinvested in shares of the Fund, are taxable to shareholders as ordinary
income (except as described below).
 
  The Federal Securities Fund, Diversified Income Fund, High Income Fund, Gov-
ernment Securities Fund and Tax Exempt Insured Fund must report the discount
or interest on debt securities (such as zero-coupon or pay-in-kind securities)
that contain original issue discount as income even though they do not receive
a corresponding cash interest payment until the security's maturity or payment
date. Therefore, the Fund may have to sell some of its assets in order to dis-
tribute cash to shareholders so as to comply with the distribution require-
ments applicable to regulated investment companies.
 
  With respect to the Tax Exempt Insured Fund, distributions out of net in-
vestment income attributable to interest received on tax-exempt securities
("exempt-interest dividends") will be exempt from Federal income tax when paid
to shareholders. It also should be noted that interest on certain "private ac-
tivity bonds" issued after August 7, 1986, is an item of tax preference for
purposes of the alternative minimum tax (investment in such securities will be
limited to 30% of the Fund's net assets). The Fund anticipates that a portion
of its investment may be made in such "private activity bonds" with the result
that a portion of the exempt-interest dividends paid by the Fund will be an
item of tax preference to shareholders subject to the alternative minimum tax.
Additionally, tax-exempt interest, whether or not a tax preference, must be
considered by corporations in determining the amount of the adjustment to al-
ternative minimum taxable income for purposes of the adjustment based on ad-
justed current earnings. Moreover, shareholders should be aware that, while
exempt from Federal income tax, exempt-interest dividends may be taxable for
state and local tax purposes.
   
  Statements as to the tax status of distributions to shareholders of the
Funds will be mailed annually. Shareholders are urged to consult their own tax
advisors regarding specific questions as to Federal, state or local taxes.
Foreign shareholders are also urged to consult their own tax advisors regard-
ing the foreign tax consequences of ownership of interests in a Fund. See
"Dividends, Distributions and Taxes" in the Statement of Additional Informa-
tion.     
 
                              GENERAL INFORMATION
 
  REPORTS TO SHAREHOLDERS. The Trust sends to its shareholders audited annual
and unaudited semi-annual reports for the Funds. The financial statements ap-
pearing in annual reports are audited by independent accountants. In addition,
the Transfer Agent sends to each shareholder having an account directly with
the Trust a statement confirming transactions in the account.
 
  ORGANIZATION. The Trust, a business trust organized under the laws of the
Commonwealth of Massachusetts on April 24, 1986, is an open-end diversified
management investment company, commonly referred to as a mutual fund. The
Trust consists of five investment series or funds: Government Securities Fund,
Federal Securities Fund, Diversified Income Fund, High Income Fund and Tax Ex-
empt Insured Fund. The Trustees have the authority to issue an unlimited num-
ber of shares of beneficial interest of separate series, par value $.01 per
share, of the Trust, and to divide each such series into one or more classes
of shares.
 
                                      27
<PAGE>
 
  The Trust does not hold annual shareholder meetings. The Trustees are re-
quired to call a meeting of shareholders for the purpose of voting upon the
question of removal of any Trustee when so requested in writing by the share-
holders of record holding at least 10% of the Trust's outstanding shares. Each
share of each Fund has equal voting rights on each matter pertaining to that
Fund or matters to be voted upon by the Trust, except as noted above. Each
share of each Fund is entitled to participate equally with the other shares of
that Fund in dividends and other distributions and the proceeds of any liqui-
dation, except that, due to the differing expenses borne by the three classes,
such dividends and proceeds are likely to be lower for Class B and Class C
shares than for Class A shares. See the Statement of Additional Information
for more information with respect to the distinctions among classes.
 
  Under Massachusetts law, shareholders of a trust, such as the Trust, in cer-
tain circumstances may be held personally liable as partners for the obliga-
tions of the trust. However the Declaration of Trust, pursuant to which the
Trust was organized, contains an express disclaimer of shareholder liability
for acts or obligations of the Trust. The Declaration of Trust also provides
for indemnification out of the Trust's property for any shareholder held per-
sonally liable for any Trust obligation. Thus the risk of a shareholder being
personally liable as a partner for obligations of the Trust, is limited to the
unlikely circumstance in which the Trust itself would be unable to meet its
obligations.
   
  INDEPENDENT ACCOUNTANTS AND LEGAL COUNSEL. PricewaterhouseCoopers LLP (suc-
cessor firm to Price Waterhouse LLP), 1177 Avenue of the Americas, New York,
NY 10036, serves as independent accountants for the Funds. The firm of
Shereff, Friedman, Hoffman & Goodman, LLP, 919 Third Avenue, New York, NY
10022, serves as legal counsel for the Funds.     
   
YEAR 2000 READINESS     
   
  Many services provided to the Trust and its shareholders by the Adviser, the
Distributor and the Administrator rely on the smooth functioning of their com-
puter and computer-based systems as well as those of its outside providers.
Many computer and computer-based systems cannot distinguish the year 2000 from
the year 1900 because of the way the systems encode and calculate dates. This
Year 2000 Issue potentially could have an adverse impact on the handling of
security trades, the payment of interest and dividends, pricing and account
services. The Adviser, the Distributor and the Administrator recognize the im-
portance of the Year 2000 Issue and are taking the appropriate steps necessary
in preparation of the year 2000. The Adviser, the Distributor and the Adminis-
trator fully anticipate that their systems and those of their outside service
providers will be adapted in time for the year 2000, and to further this goal,
have coordinated a plan to repair, adapt or replace systems that are not Year
2000 compliant and have obtained similar assurances from their outside service
providers. The Adviser, the Distributor and the Administrator expect to sig-
nificantly complete their plan by the end of the 1998 calendar year and then
perform appropriate systems testing in the 1999 calendar year.     
 
  SHAREHOLDER INQUIRIES. All inquiries regarding the Trust should be directed
to the Trust at the telephone number or address on the cover page of this Pro-
spectus. For questions concerning share ownership, dividends, transfer of own-
ership or share redemption, contact SAFS, Mutual Fund Operations, The
SunAmerica Center, 733 Third Avenue, New York, NY 10017-3204, or call
Shareholder/Dealer Services at (800) 858-8850.
 
                                      28
<PAGE>
 
 
 
 
NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS, OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS OR THE
STATEMENT OF ADDITIONAL INFORMATION AND, IF GIVEN OR MADE, SUCH OTHER
INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED BY THE FUND, THE ADVISER OR THE DISTRIBUTOR. THIS PROSPECTUS DOES
NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF
THE SECURITIES OFFERED HEREBY IN ANY JURISDICTION IN WHICH SUCH OFFER TO SELL
OR SOLICITATION OF AN OFFER TO BUY MAY NOT LAWFULLY BE MADE.
 
                                     LOGO
                               SunAmerica
                               Capital Services
                               Distributor
IFPRO
<PAGE>
 
    
                            SUNAMERICA INCOME FUNDS
                      STATEMENT OF ADDITIONAL INFORMATION
                              DATED JULY 27, 1998      
The SunAmerica Center                               General Marketing and
733 Third Avenue                                    Shareholder  Information
New York, NY  10017-3204                                (800) 858-8850

     SunAmerica Income Funds (the "Trust") is a mutual fund consisting of five
different investment funds: SunAmerica U.S. Government Securities Fund,
SunAmerica Federal Securities Fund, SunAmerica Diversified Income Fund,
SunAmerica High Income Fund and SunAmerica Tax Exempt Insured Fund.  Each Fund
has distinct investment objectives and strategies.
    
     This Statement of Additional Information is not a Prospectus, but should be
read in conjunction with the Trust's Prospectus dated July 27, 1998.  To obtain
a Prospectus, please call the Trust at (800) 858-8850.  Capitalized terms used
herein but not defined have the meanings assigned to them in the Prospectus. 
     

                               TABLE OF CONTENTS
<TABLE>
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                                                                               PAGE
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<S>                                                                            <C>
HISTORY OF THE FUNDS............................................................B-2
INVESTMENT OBJECTIVES AND POLICIES..............................................B-2
INVESTMENT RESTRICTIONS........................................................B-36
TRUSTEES AND OFFICERS..........................................................B-39
ADVISER, PERSONAL SECURITIES TRADING, DISTRIBUTOR AND ADMINISTRATOR............B-43
PORTFOLIO TRANSACTIONS AND BROKERAGE...........................................B-48
ADDITIONAL INFORMATION REGARDING PURCHASE OF SHARES............................B-50
ADDITIONAL INFORMATION REGARDING REDEMPTION OF SHARES..........................B-58
DETERMINATION OF NET ASSET VALUE...............................................B-59
PERFORMANCE DATA...............................................................B-59
DIVIDENDS, DISTRIBUTIONS AND TAXES.............................................B-65
RETIREMENT PLANS...............................................................B-69
DESCRIPTION OF SHARES..........................................................B-70
ADDITIONAL INFORMATION.........................................................B-72
FINANCIAL STATEMENTS...........................................................B-74
APPENDIX.................................................................APPENDIX-1
</TABLE>

     No dealer, salesman or other person has been authorized to give any
information or to make any representations, other than those contained in this
Statement of Additional Information or in the Prospectus, and, if given or made,
such other information or representations must not be relied upon as having been
authorized by the Trust, the Adviser or the Distributor.  This Statement of
Additional Information and the Prospectus do not constitute an offer to sell or
a solicitation of an offer to buy any of the securities offered hereby in any
jurisdiction in which such an offer to sell or solicitation of an offer to buy
may not lawfully be made.

                                      B-1
<PAGE>
 
     This Statement of Additional Information relates to the five different
investment funds of SunAmerica Income Funds, a Massachusetts business trust,
which is registered as an open-end investment company under the  Investment
Company Act of 1940, as amended (the "1940 Act").  The five Funds are:
SunAmerica U.S. Government Securities Fund, SunAmerica Federal Securities Fund,
SunAmerica Diversified Income Fund, SunAmerica High Income Fund and SunAmerica
Tax Exempt Insured Fund.

                              HISTORY OF THE FUNDS
    
      On October 1, 1993, the Trust, which had been organized in 1986,
reorganized with certain mutual funds in the SunAmerica Family of Mutual Funds
(the "Reorganization") and was renamed "SunAmerica Income Funds."  In the
Reorganization, all outstanding shares of the two existing series of the Trust,
the Government Income Portfolio (the "Government Income Portfolio") and the High
Yield Portfolio (the "High Yield Portfolio"), were redesignated Class A shares
and renamed the Government Securities Fund and the High Income Fund,
respectively.  In addition, the SunAmerica U.S. Government Securities Fund
series of SunAmerica Fund Group ("Old Government Securities") and the SunAmerica
High Income Fund series of SunAmerica Fund Group ("Old High Income") reorganized
with, and its shareholders received Class B shares of, the Government Securities
Fund and the High Income Fund, respectively.      

     With regard to the three additional series of the Trust, the Federal
Securities Fund, the Diversified Income Fund and the Tax Exempt Insured Fund,
the SunAmerica Federal Securities Fund ("Old Federal Securities") was
reorganized with, and its shareholders received Class B shares of, the Federal
Securities Fund.  In addition, the SunAmerica Diversified Income Fund series of
SunAmerica Multi-Asset Portfolios, Inc. ("Old Diversified Income") was
reorganized with, and its shareholders received Class B shares of, the
Diversified Income Fund.  Until December 16, 1992, Old Diversified Income had a
different investment objective and was named SunAmerica Global Short-Term Income
Fund.  Finally, the SunAmerica Tax Exempt Insured Fund series of SunAmerica Tax
Free Portfolios ("Old Tax Exempt Insured") was reorganized with, and its
shareholders received Class A shares of, the Tax Exempt Insured Fund.

     The Reorganization was approved by the shareholders of the Funds or their
predecessors who were entitled to vote with respect thereto,  on September 23,
1993.

                       INVESTMENT OBJECTIVES AND POLICIES

     The investment objectives and policies of each of the Funds are described
in the Funds' Prospectus.  Certain types of securities in which the Funds may
invest and certain investment practices which the Funds may employ, which are
described under "Other Investment Practices and Restrictions" in the Prospectus,
are discussed more fully below.

U.S. GOVERNMENT SECURITIES.  Each Fund may invest in U.S. Treasury securities,
including bills, notes, 

                                      B-2
<PAGE>
 
bonds and other debt securities issued by the U.S. Treasury. These instruments
are direct obligations of the U.S. government and, as such, are backed by the
"full faith and credit" of the United States government. They differ primarily
in their interest rates, the lengths of their maturities and the dates of their
issuances. Each Fund may also invest in securities issued by agencies or
instrumentalities of the U.S. government. These obligations, including those
which are guaranteed by federal agencies or instrumentalities, may or may not be
backed by the "full faith and credit" of the United States government. All of
the foregoing are referred to collectively as "U.S. government securities."
Obligations of the Government National Mortgage Association ("GNMA"), the
Farmers Home Administration ("FHA") and the Export-Import Bank are backed by the
full faith and credit of the United States government. In the case of securities
not backed by the full faith and credit of the United States, a Fund must look
principally to the agency issuing or guaranteeing the obligation for ultimate
repayment and may not be able to assert a claim against the United States if the
agency or instrumentality does not meet its commitments. U.S. government
securities include certain mortgage-backed securities, as described below under
"Mortgage-Backed Securities."

MORTGAGE-BACKED SECURITIES.  Each Fund may invest in mortgage-backed securities.
These securities represent participation interests in pools of residential
mortgage loans made by lenders such as commercial banks, savings and loan
institutions, mortgage bankers and others, which may or may not be guaranteed by
agencies or instrumentalities of the U.S. government.

     Mortgage-backed securities differ from conventional debt securities, which
provide for periodic payment of interest in fixed amounts (usually semiannually)
with principal payments at maturity or specified call dates.  Instead, these
securities provide a monthly payment which consists of both interest and
principal payments.  In effect, these payments are a "pass-through" of the
monthly payments made by the individual borrowers on their residential mortgage
loans, net of any fees paid to the issuer or guarantor of such securities.
Additional payments are caused by prepayments resulting from the sale of the
underlying residential property, refinancing or foreclosure (net of fees or
costs which may be incurred).  In addition, prepayment of principal on mortgage-
backed securities, which often occurs when interest rates decline, can
significantly change the realized yield of these securities.  Some mortgage-
backed securities are described as "modified pass-through."  These securities
entitle the holders to receive all interest and principal payments owed on the
mortgages in the pool, net of certain fees, regardless of whether or not the
mortgagors actually make the payments.

     The yield on mortgage-backed securities is based on the average expected
life of the underlying pool of mortgage loans.  The actual life of any
particular pool will be shortened by any unscheduled or early payments of
principal and interest.  Principal prepayments generally result from the sale of
the underlying property or the refinancing or foreclosure of underlying
mortgages.  The occurrence of prepayments is affected by a wide range of
economic, demographic and social factors and, accordingly, it is not possible to
predict accurately the average life of a particular pool.  Yield on such pools
is usually computed by using the historical record of prepayments for that pool,
or, in the case of newly-issued mortgages, the prepayment history of similar
pools. The actual prepayment experience of a pool of mortgage loans may cause
the yield realized by a Fund to differ from the yield calculated on the basis

                                      B-3
<PAGE>
 
of the expected average life of the pool.

     Prepayments tend to increase during periods of  declining interest rates
and will most likely decrease during periods of rising interest rates.  When
prevailing interest rates rise, the value of a pass-through security may
decrease as do the value of other debt securities, but, when prevailing interest
rates decline, the value of a pass-through security is not likely to rise on a
comparable basis with other debt securities because of the prepayment feature of
pass-through securities.  The reinvestment of scheduled principal payments and
unscheduled prepayments that a Fund receives may occur at higher or lower rates
than the original investment, thus affecting the yield of the Fund.  Monthly
interest payments received by a Fund have a compounding effect which may
increase the yield to shareholders more than debt obligations that  pay interest
semiannually.  Because of those factors, mortgage-backed securities may be less
effective than U.S. Treasury bonds of similar maturity at maintaining yields
during periods of declining interest rates.  Accelerated prepayments adversely
affect yields for pass-through securities purchased at a premium (i.e., at a
price in excess of the principal amount) and may involve additional risk of loss
of principal because the premium may not have been fully amortized at the time
the obligation is repaid.  The opposite is true for pass-through securities
purchased at a discount.  Each Fund may purchase mortgage-backed securities at a
premium or at a discount.

     The following is a description of GNMA, Federal National Mortgage
Association ("FNMA") and  Federal Home Loan Mortgage Corporation ("FHLMC")
certificates, the most widely available mortgage-backed securities:

     GNMA Certificates.  GNMA Certificates ("GNMA Certificates") are mortgage-
     -----------------                                                       
backed securities which evidence an undivided interest in a pool or pools of
mortgages.  GNMA Certificates that each Fund may purchase are the modified pass-
through type, which entitle the holder to receive timely payment of all interest
and principal payments due on the mortgage pool, net of fees paid to the issuer
and GNMA, regardless of whether or not the mortgagor actually makes the payment.

     GNMA guarantees the timely payment of principal and interest on securities
backed by a pool of mortgages insured by the FHA or the Farmers' Home
Administration ("FMHA"), or guaranteed by the Veteran's Administration  ("VA").
The GNMA guarantee is authorized by the National Housing Act and is backed by
the full faith and credit of the United States.  The GNMA is also empowered to
borrow without limitation from the U.S. Treasury if necessary to make any
payments required under its guarantee.

     The average life of a GNMA Certificate is likely to be substantially
shorter than the original maturity of the mortgages underlying the securities.
Prepayments of principal by mortgagors and mortgage foreclosure will usually
result in the return of the greater part of principal investment long before the
maturity of the mortgages in the pool.  Foreclosures impose no risk to principal
investment because of the GNMA guarantee, except to the extent that a Fund has
purchased the certificates at a premium in the secondary market.  As prepayment
rates of the individual mortgage pools vary widely, it is not possible to
predict accurately the average life of a particular issue of GNMA Certificates.

                                      B-4
<PAGE>
 
     The coupon rate of interest of GNMA Certificates is lower than the interest
rate paid on the VA-guaranteed or FHA-insured mortgages underlying the GNMA
Certificates by the amount of the fees paid to GNMA and the issuer.  The coupon
rate by itself, however, does not indicate the yield which will be earned on
GNMA Certificates.  First, GNMA Certificates may trade in  the secondary market
at a premium or discount.  Second, interest is earned monthly, rather than
semiannually as with traditional bonds; monthly compounding raises the effective
yield earned.  Finally, the actual yield of a GNMA Certificate is influenced by
the prepayment experience of the mortgage pool underlying it. For example, if
the higher-yielding mortgages from the pool are prepaid, the yield on the
remaining pool will be reduced.

     FHLMC Certificates. FHLMC issues two types of mortgage pass-through
     ------------------                                                 
securities:  mortgage participation certificates ("PCS") and guaranteed mortgage
certificates ("GMCs") (collectively, "FHLMC Certificates").  PCS resemble GNMA
Certificates in that each PC represents a pro rata share of all interest and
principal payments made and owed on the underlying pool.  Like GNMA
Certificates, PCS are assumed to be prepaid fully in their twelfth year.  The
FHLMC guarantees timely monthly payment of interest (and, under certain
circumstances, principal) of PCS and the ultimate payment of principal.

     GMCs also represent a pro rata interest in a pool of mortgages.  However,
these instruments pay interest semiannually and return principal once a year in
guaranteed minimum payments.  The expected average life of these securities is
approximately ten years.  The FHLMC guarantee is not backed by the full faith
and credit of the U.S. government.

     FNMA Certificates. FNMA issues guaranteed mortgage pass-through
     -----------------                                              
certificates ("FNMA Certificates").  FNMA Certificates represent a pro rata
share of all interest and principal payments made and owed on the underlying
pool.  FNMA guarantees timely payment of interest and principal on FNMA
Certificates.  The FNMA guarantee is not backed by the full faith and credit of
the U.S. government.  However, FNMA guarantees timely payment of interest on
FNMA Certificates and the full return of principal.

     Collateralized Mortgage Obligations.  Another type of mortgage-backed
security in which each Fund may invest is a Collateralized Mortgage Obligation
("CMO").  CMOs are fully-collateralized bonds which are the general obligations
of the issuer thereof (e.g., the U.S. government, a U.S. government
instrumentality, or a private issuer).  The Government Securities Fund will not
invest in privately issued CMOs except to the extent that they are
collateralized by securities of entities that are instrumentalities of the U.S.
government.  CMOs generally are secured by an assignment to a trustee (under the
indenture pursuant to which the bonds are issued) of collateral consisting of a
pool of mortgages.  Payments with respect to the underlying mortgages generally
are made to the trustee under the indenture.  Payments of principal and interest
on the underlying mortgages are not passed through to the holders of the CMOs as
such (i.e., the character of payments of principal and interest is not passed
through, and therefore payments to holders of CMOs attributable to interest paid
and principal repaid on the underlying mortgages do not necessarily constitute
income and return of capital, respectively, to such holders), but such payments
are dedicated to payment of interest on and repayment 

                                      B-5
<PAGE>
 
of principal of the CMOs. CMOs often are issued in two or more classes with
varying maturities and stated rates of interest. Because interest and principal
payments on the underlying mortgages are not passed through to holders of CMOs,
CMOs of varying maturities may be secured by the same pool of mortgages, the
payments on which are used to pay interest on each class and to retire
successive maturities in sequence. Unlike other mortgage-backed securities, CMOs
are designed to be retired as the underlying mortgages are repaid. In the event
of prepayment on such mortgages, the class of CMO first to mature generally will
be paid down. Therefore, although in most cases the issuer of CMOs will not
supply additional collateral in the event of such prepayment, there will be
sufficient collateral to secure CMOs that remain outstanding.

     Certain CMOs may be deemed to be investment companies under the 1940 Act.
Each Fund intends to conduct operations in a manner consistent with this view,
and therefore generally may not invest more than 10% of its total assets in such
issuers without obtaining appropriate regulatory relief. In reliance on recent
Securities and Exchange Commission ("SEC") staff interpretations, each Fund may
invest in those CMOs and other mortgage-backed securities that are not by
definition excluded from the provisions of the 1940 Act, but have obtained
exemptive orders from the SEC from such provisions.

     Stripped Mortgage-Backed Securities.  The mortgage-backed securities in
which each Fund may invest include stripped mortgage-backed securities.  Unlike
U.S. Treasury securities, which are stripped into separate securities for each
interest and principal payment, mortgage securities are generally stripped into
only two parts:  a PO (principal only) strip representing all principal payments
and an IO (interest-only) strip representing all interest payments.

     The feature that makes mortgage strips most useful in portfolio management
is their interest rate sensitivity.  In principle, mortgage strips can be very
useful hedging devices for a variety of investors and portfolio managers.
However, determining the degree of interest sensitivity of mortgage strips in
different interest rate environments is extremely complicated.

     The precise sensitivity of mortgage-backed securities and their associated
stripped securities to interest rate changes depends on many factors.  First,
the prepayment effect makes the interest rate sensitivity of mortgage-backed
securities different from the interest sensitivity of Treasury securities.
Second, the prepayment effect makes the PO and IO mortgage-backed strips much
more sensitive, on average, to interest rates than the underlying mortgage-
backed security.  Third, the prepayment effect is sometimes so strong that an IO
mortgage-backed strip will rise in value when interest rates rise and fall in
value when  interest rates fall -- precisely the opposite relationship from
other fixed-income securities.  This last feature of stripped mortgage-backed
securities, the positive relationship between the value of some IO strips and
interest rates, is particularly useful to investors who need to hedge a
portfolio of other fixed-income securities.

     Mortgage-Backed Security Rolls.  The Diversified Income Fund, the Federal
Securities Fund and the Government Securities Fund may enter into "forward roll"
transactions with respect to mortgage-backed securities issued by GNMA, FNMA or
FHLMC.  In a forward roll transaction, the Fund will sell a mortgage-backed
security to a U.S. government agency or financial institution and 

                                      B-6
<PAGE>
 
simultaneously agree to repurchase a similar security from the institution at a
later date at an agreed upon price. The mortgage-backed securities that are
repurchased will bear the same interest rate as those sold, but generally will
be collateralized by different pools of mortgages with different prepayment
histories than those sold. Risks inherent in mortgage-backed security rolls
include: (i) the risk of prepayment prior to maturity, (ii) the possibility that
a Fund may not be entitled to receive interest and principal payments on the
securities sold and that the proceeds of the sale may have to be invested in
money market instruments (typically repurchase agreements) maturing not later
than the expiration of the roll, and (iii) the risk that the market value of the
securities sold by a Fund may decline below the price at which a Fund is
obligated to purchase the securities. Upon entering into a mortgage-backed
security roll a Fund will be required to place cash or other liquid securities
in a segregated account with its custodian in an amount equal to its obligation
under the roll; that amount is subject to the limitation on borrowing described
below under "Investment Restrictions."

ASSET-BACKED SECURITIES.  Each Fund may invest up to 15% of its net assets in
asset-backed securities meeting such Fund's credit quality restrictions.  These
securities, issued by trusts and special purpose corporations, are backed by a
pool of assets, such as credit card and automobile loan receivables,
representing the obligations of a number of different parties.  Each Fund may
also invest in privately issued asset-backed securities.

      Asset-backed securities present certain risks.  For instance, in the case
of credit card receivables, these securities may not have the benefit of any
security interest in the related collateral. Credit card receivables are
generally unsecured and the debtors are entitled to the protection of a number
of state and federal consumer credit laws, many of which give such debtors the
right to set off certain amounts owed on the credit cards, thereby reducing the
balance due.  Most issuers of automobile receivables permit the servicer to
retain possession of the underlying obligations.  If the servicer were to sell
these obligations to another party, there is a risk that the purchaser would
acquire an interest superior to that of the holders of the related automobile
receivables.  In addition, because of the large number of vehicles involved in a
typical issuance and technical requirements under state laws, the trustee for
the holders of the automobile receivables may not have a proper security
interest in all of the obligations backing such receivables.  Therefore, there
is the possibility that recoveries on repossessed collateral may not, in some
cases, be available to support payments on these securities.

     Asset-backed securities are often backed by a pool of assets representing
the obligations of a number of different parties.  To lessen the effect of
failures by obligors to make payments on underlying assets, the securities may
contain elements of credit support which fall into two categories:  (i)
liquidity protection; and (ii) protection against losses resulting from ultimate
default by an obligor on the underlying assets.  Liquidity protection refers to
the provision of advances, generally by the entity administering the pool of
assets, to ensure that the receipt of payments on the underlying pool occurs in
a timely fashion.  Protection against losses resulting from ultimate default
ensures payment through insurance policies or letters of credit obtained by the
issuer or sponsor from third parties.  The Fund will not pay any additional or
separate fees for credit support.  The degree of credit support provided for
each issue is generally based on historical information respecting the level of
credit risk associated

                                      B-7
<PAGE>
 
with the underlying assets. Delinquency or loss in excess of that anticipated or
failure of the credit support could adversely affect the return on an investment
in such a security.

ZERO-COUPON SECURITIES.  The Diversified Income Fund, the High Income Fund, the
Federal Securities Fund and the Government Securities Fund may invest in zero-
coupon securities issued by the U.S. Treasury and, in addition, (ii) the
Diversified Income Fund and High Income Fund may invest in zero-coupon
securities issued by both domestic and foreign corporations, and (iii) the Tax
Exempt Insured Fund may invest in zero-coupon securities issued by state and
local government entities.  Investors earn a return on a zero-coupon bond by
purchasing the bond at a discount, that is, by paying less than the face value
of the bond.  Since there are no periodic interest payments to reinvest, there
is no reinvestment risk.  The yield of a zero-coupon held to maturity is the
yield quoted when the bond is sold.  Because a zero-coupon security pays no
interest to its holder during its life or for a substantial period of time, it
usually trades at a deep discount from its face or par value and will be subject
to greater fluctuations of market value in response to changing interest rates
than debt obligations of comparable maturities which make current distributions
of interest.  Because the Funds accrue taxable income from these securities
without receiving cash, the Funds may be required to sell portfolio securities
in order to pay a dividend depending upon the proportion of shareholders who
elect to receive dividends in cash rather than reinvesting dividends in
additional shares of the Funds.  The Funds might also sell portfolio securities
to maintain portfolio liquidity.  In either case, cash distributed or held by
the Funds and not reinvested will hinder the Funds in seeking a high level of
current income.

     Zero-Coupon U.S. Government Securities.  Zero-coupon U.S. government
securities are:  (i) U.S. Treasury notes and bonds which have been stripped of
their unmatured interest coupons and receipts; or (ii) certificates representing
interest in such stripped debt obligations or coupons.

     Corporate Zero-Coupon Securities.  Corporate zero-coupon securities are:
(i) notes or debentures which do not pay current interest and are issued at
substantial discounts from par value, or (ii) notes or debentures that pay no
current interest until a stated date one or more years into the future, after
which the issuer is obligated to pay interest until maturity, usually at a
higher rate than if interest were payable from the date of issuance and may also
make interest payments in kind (e.g., with identical zero-coupon securities).
Such corporate zero-coupon securities, in addition to the risks identified
above, are subject to the risk of the issuer's failure to pay interest and repay
principal in accordance with the terms of the obligation.  A Fund must accrue
the discount or interest on high-yield bonds structured as zero-coupon
securities as income even though it does not receive a corresponding cash
interest payment until the security's maturity or payment date.  See "Foreign
Securities" for a description of the risks involved in investments in foreign
corporations.

PARTICIPATION INTERESTS.  The Diversified Income Fund and High Income Fund may
invest in loan participation interests, subject to the 10% of net assets
limitation on illiquid investments.  These participation interests provide each
Fund an undivided interest in a loan made by the issuing financial institution
in the proportion that the Fund's participation interest bears to the total
principal amount of the loan.  The loan participations in which the Funds may
invest will typically be participating interests in loans made by a syndicate of
banks, represented by an agent bank which has negotiated and 

                                      B-8
<PAGE>
 
structured the loan, to corporate borrowers to finance internal growth, mergers,
acquisitions, stock repurchases, leveraged buy-outs and other corporate
activities. Such loans may also have been made to governmental borrowers,
especially governments of developing countries (LOC debt). The loans underlying
such participations may be secured or unsecured, and each Fund may invest in
loans collateralized by mortgages on real property or which have no collateral.
The loan participations themselves may extend for the entire term of the loan or
may extend only for short "strips" that correspond to a quarterly or monthly
floating rate interest period on the underlying loan. Thus, a term or revolving
credit that extends for several years may be subdivided into shorter periods.
    
     The loan participations in which each Fund will invest will also vary in
legal structure. Occasionally, lenders assign to another institution both the
lender's rights and obligations under a credit agreement.  Since this type of
assignment relieves the original lender of its obligations, it is called a
novation.  More typically, a lender assigns only its right to receive payments
of principal and interest under a promissory note, credit agreement or similar
document.  A true assignment shifts to the assignee the direct debtor-creditor
relationship with the underlying borrower.  Alternatively, a lender may assign
only part of its rights to receive payments pursuant to the underlying
instrument or loan agreement.  Such partial assignments, which are more
accurately characterized as "participating interests," do not shift the debtor-
creditor relationship to the assignee, who must rely on the original lending
institution to collect sums due and to otherwise enforce its rights against the
agent bank which administers the loan or against the underlying borrower.      

     No more than 5% of each Fund's net assets can be invested in participation
interests of the same issuing bank.  Each Fund must look to the creditworthiness
of the borrowing entity, which is obligated to make payments of principal and
interest on the loan.  In the event the borrower fails to pay scheduled interest
or principal payments, the Fund could experience a reduction in its income and
might experience a decline in the net asset value of its shares.  In the event
of a failure by the financial institution to perform its obligation in
connection with the participation agreement, the Fund might incur certain costs
and delays in realizing payment or may suffer a loss or principal and/or
interest.

FOREIGN SECURITIES.  The Diversified Income Fund and High Income Fund may invest
in U.S. dollar denominated fixed-income securities issued by domestic
corporations in any industry.  The Funds may also invest in debt obligations
(which may be denominated in U.S. dollars or in non-U.S. currencies) issued or
guaranteed by foreign corporations, certain supranational entities and foreign
governments (including political subdivisions having taxing authority) or their
agencies and instrumentalities, and debt obligations issued by U.S. corporations
which are either denominated in non-U.S. currencies or traded in the foreign
markets (e.g., Eurobonds).

     The Adviser may direct the investment of assets of the Diversified Income
Fund and the High Income Fund in securities of foreign issuers in the form of
American Depositary  Receipts ("ADRs"), European Depositary Receipts ("EDRs") or
other similar securities convertible into securities of foreign issuers.  These
securities may not necessarily be denominated in the same currency as the
securities into which they may be converted.  ADRs are receipts typically issued
by a U.S. bank or trust company evidencing ownership of the underlying
securities.  EDRs are European receipts evidencing a similar 

                                      B-9
<PAGE>
 
arrangement. ADRs may be sponsored or unsponsored. A sponsored ADR is issued by
a depository which has an exclusive relationship with the issuer of the
underlying security. An unsponsored ADR may be issued by any number of U.S.
depositories. Holders of unsponsored ADRs generally bear all the costs
associated with establishing the unsponsored ADR. The depository of an
unsponsored ADR is under no obligation to distribute shareholder communications
received from the underlying issuer or to pass through to the holders of the
unsponsored ADR voting rights with respect to the deposited securities or pool
of securities. The Funds may invest in either type of ADR. Although the U.S.
investor holds a substitute receipt of ownership rather than direct stock
certificates, the use of the depository receipts in the United States can reduce
costs and delays as well as potential currency exchange and other difficulties.
The Funds may purchase securities in local markets and direct delivery of these
ordinary shares to the local depository of an ADR agent bank in the foreign
country. Simultaneously, the ADR agents create a certificate which settles at
the Fund's custodian in five days. The Funds may also execute trades on the U.S.
markets using existing ADRs. A foreign issuer of the security underlying an ADR
is generally not subject to the same reporting requirements in the United States
as a domestic issuer. Accordingly the information available to a U.S. investor
will be limited to the information the foreign issuer is required to disclose in
its own country and the market value of an ADR may not reflect undisclosed
material information concerning the issuer of the underlying security. For
purposes of a Fund's investment policies, the Fund's investments in these types
of securities will be deemed to be investments in the underlying securities.
Generally, ADRs, in registered form, are dollar denominated securities designed
for use in the U.S. securities markets and EDRs, in bearer form, are designed
for use in the European securities markets.

     The obligations of foreign governmental entities may or may not be
supported by the full faith and credit of a foreign government.  Obligations of
supranational entities include those of international organizations designated
or supported by governmental entities to promote economic reconstruction or
development and of international banking institutions and related government
agencies.  Examples include the International Bank for Reconstruction and
Development (the World Bank), the European Coal and Steel Community, the Asian
Development Bank and the Inter-American Development Bank. The governmental
members, or "stockholders," usually make initial capital contributions to the
supranational entity and in many cases are committed to make additional capital
contributions if the supranational entity is unable to repay its borrowings.
Each supranational entity's lending activities are limited to a percentage of
its total capital (including "callable capital" contributed by members at the
entity's call), reserves and net income.  There is no assurance that foreign
governments will be able or willing to honor their commitments.

     Investments in foreign securities, including securities of developing
countries, present special additional investment risks and considerations not
typically associated with investments in domestic securities, including
reduction of income by foreign taxes; fluctuation in value of foreign portfolio
investments due to changes in currency rates and control regulations (e.g.,
currency blockage); transaction charges for currency exchange; lack of public
information about foreign issuers; lack of uniform accounting, auditing and
financial reporting standards comparable to those applicable to domestic
issuers; less volume on foreign exchanges than on U.S. exchanges; greater
volatility and less liquidity on foreign markets than in the U.S.; less
regulation of foreign issuers, stock exchanges and 

                                      B-10
<PAGE>
 
brokers than in the U.S.; greater difficulties in commencing lawsuits; higher
brokerage commission rates than in the U.S.; increased possibilities in some
countries of expropriation, confiscatory taxation, political, financial or
social instability or adverse diplomatic developments; and differences (which
may be favorable or unfavorable) between the U.S. economy and foreign economies.

     Because the Diversified Income Fund and the High Income Fund may purchase
securities denominated in foreign currencies, a change in the value of any such
currency against the U.S. dollar will result in a change in the U.S. dollar
value of each Fund's assets and income available for distribution.  In addition,
although a portion of each Fund's investment income may be received or realized
in foreign currencies, the Fund will be required to compute and distribute its
income in U.S. dollars, and absorb the cost of currency fluctuations.  Each Fund
may engage in foreign currency exchange transactions for hedging purposes to
protect against changes in future exchange rates.  See "Hedging Strategies."
Costs will be incurred in connection with conversions between various
currencies.

     The values of foreign investments and the investment income derived from
them may also be affected unfavorably by changes in currency exchange control
regulations.  Although the Funds will invest only in securities denominated in
foreign currencies that at the time of investment do not have significant
government-imposed restrictions on conversion into U.S. dollars, there can be no
assurance against subsequent imposition of currency controls.  In addition, the
values of foreign securities will fluctuate in response to changes in U.S. and
foreign interest rates.

     Investments in foreign securities offer potential benefits not available
from investments solely in securities of domestic issuers by offering the
opportunity to invest in foreign issuers that appear to offer growth potential,
or in foreign countries with economic policies or business cycles different from
those of the U.S., or to reduce fluctuations in portfolio value by taking
advantage of foreign stock and bond markets that do not move in a manner
parallel to U.S. markets.  From time to time, U.S. government policies have
discouraged certain investments abroad by U.S. investors, through taxation or
other restrictions, and it is possible that such restrictions could be
reimposed.

ILLIQUID SECURITIES.  Each Fund may invest up to 10% of its net assets,
determined as of the date of purchase, in illiquid securities including
repurchase agreements which have a maturity of longer than seven days or in
other securities that are illiquid by virtue of the absence of a readily
available market or legal or contractual restrictions on resale.  Historically,
illiquid securities have included securities subject to contractual or legal
restrictions on resale because they have not been registered under the
Securities Act  of 1933, as amended ("Securities Act"), securities which are
otherwise not readily marketable and repurchase agreements having a maturity of
longer than seven days.  Repurchase agreements subject to demand are deemed to
have a maturity equal to the notice period.  Securities which have not been
registered under the Securities Act are referred to as private placements or
restricted securities and are purchased directly from the issuer or in the
secondary market.  Mutual funds do not typically hold a significant amount of
these restricted or other illiquid securities because of the potential for
delays on resale and uncertainty in valuation.  Limitations on resale may have
an adverse effect on the marketability of portfolio securities and a mutual fund
might be unable to dispose 

                                      B-11
<PAGE>
 
of restricted or other illiquid securities promptly or at reasonable prices and
might thereby experience difficulty satisfying redemptions within seven days. A
mutual fund might also have to register such restricted securities in order to
dispose of them, resulting in additional expense and delay. There will generally
be a lapse of time between a mutual fund's decision to sell an unregistered
security and the registration of such security promoting sale. Adverse market
conditions could impede a public offering of such securities. When purchasing
unregistered securities, each of the Funds will seek to obtain the right of
registration at the expense of the issuer (except in the case of Rule 144A
securities).

     In recent years, a large institutional market has developed for certain
securities that are not registered under the Securities Act, including
repurchase agreements, commercial paper, foreign securities, municipal
securities and corporate bonds and notes.  Institutional investors depend on an
efficient institutional market in which the unregistered security can be readily
resold or on an issuer's ability to honor a demand for repayment.  The fact that
there are contractual or legal restrictions on resale to the general public or
to certain institutions may not be indicative of the liquidity of such
investments.

     Restricted securities eligible for resale pursuant to Rule 144A under the
Securities Act, for which there is a readily available market, may be deemed to
be liquid.  The Adviser  will monitor the liquidity of such restricted
securities subject to the supervision of the Board of Trustees of the Trust (the
"Trustees").  In reaching liquidity decisions, the Adviser will consider, inter
alia, the following factors:  (1) the frequency of trades and quotes for the
security; (2) the number of dealers wishing to purchase or sell the security and
the number of other potential purchasers; (3) dealer undertakings to make a
market in the security; and (4) the nature of the security and the nature of the
marketplace trades (e.g., the time needed to dispose of the security, the method
of soliciting offers and the mechanics of the transfer).

     Commercial paper issues in which the Funds may invest, include securities
issued by major corporations without registration under the Securities Act in
reliance on the exemption from such registration afforded by Section 3(a)(3)
thereof, and commercial paper issued in reliance on the so-called private
placement exemption from registration which is afforded by Section 4(2) of the
Securities Act ("Section 4(2) paper").  Section 4(2) paper is restricted as to
disposition under the Federal securities laws in that any resale must similarly
be made in an exempt transaction.  Section 4(2) paper is normally resold to
other institutional investors through or with the assistance of investment
dealers who make a market in Section 4(2) paper, thus providing liquidity.
Section 4(2) paper that is issued by a company that files reports under the
Securities Exchange Act of 1934 is generally eligible to be sold in reliance on
the safe harbor of Rule 144A described above.  A Fund's 10% limitation on
investments in illiquid securities includes Section 4(2) paper other than
Section 4(2) paper that the Adviser has determined to be liquid pursuant to
guidelines established by the Trustees.  The Trustees delegated to the Adviser
the function of making day-to-day determinations of liquidity with respect to
Section 4(2) paper, pursuant to guidelines approved by the Trustees that require
the Adviser to take into account the same factors described above for other
restricted securities and require the Adviser to perform the same monitoring and
reporting functions.

                                      B-12
<PAGE>
 
     The staff of the SEC has taken the position that purchased over-the-counter
("OTC") options and the assets used as "cover" for written OTC options are
illiquid.  The assets used as cover for OTC options written by a Fund will be
considered illiquid unless the OTC options are sold to qualified dealers who
agree that the Fund may repurchase any OTC option it writes at a maximum price
to be calculated by a formula set forth in the option agreement.  The cover for
an OTC option written subject to this procedure will be considered illiquid only
to the extent that the maximum repurchase price under the option formula exceeds
the intrinsic value of the option.

SHORT-TERM AND TEMPORARY DEFENSIVE INSTRUMENTS.  For temporary defensive
purposes, each Fund may invest up to 100% of its total assets in short-term
fixed-income securities, including corporate debt obligations and money market
instruments rated in one of the two highest categories by a nationally
recognized statistical rating organization (or determined by the Adviser to be
of equivalent quality). A description of securities ratings is contained in the
Appendix to this Statement of Additional Information.

     Subject to the limitations described above, the following is a description
of the types of money market and short-term fixed-income securities in which the
Funds may invest:

     U.S. Government Securities:  See the section entitled "U.S. Government
Securities" below.

     Commercial Paper:  Commercial paper consists of short-term (usually from 1
to 270 days) unsecured promissory notes issued by entities in order to finance
their current operations.  Each Fund's commercial paper investments may include
variable amount master demand notes and floating rate or variable rate notes.
Variable amount master demand notes and variable amount floating rate notes are
obligations that permit the investment of fluctuating amounts by a Fund at
varying rates of interest pursuant to direct arrangements between a Fund, as
lender, and the borrower.  Master demand notes permit daily fluctuations in the
interest rates, while interest rates under variable amount floating rate notes
fluctuate on a weekly basis.  These notes permit daily changes in the amounts
borrowed.  A Fund has the right to increase the amount under these notes at any
time, up to the full amount provided by the note agreement, or to decrease the
amount, and the borrower may repay up to the full amount of the note without
penalty.  Because these types of notes are direct lending arrangements between
the lender and the borrower, it is not generally contemplated that such
instruments will be traded and there is no secondary market for these notes.
Master demand notes are redeemable (and, thus, immediately repayable by the
borrower) at face value, plus accrued interest, at any time.  Variable amount
floating rate notes are subject to next-day redemption, 14 days after the
initial investment therein.  With both types of notes, a Fund's right to redeem
depends on the ability of the borrower to pay principal and interest on demand.
In connection with both types of note arrangements, a Fund considers earning
power, cash flow and other liquidity ratios of the issuer.  These notes, as
such, are not typically rated by credit rating agencies.  Unless they are so
rated, a Fund may invest in them only if at the time of an investment the issuer
has an outstanding issue of unsecured debt rated in one of the two highest
categories by a nationally recognized statistical rating organization.

     Certificates of Deposit and Bankers' Acceptances:  Certificates of deposit
are receipts issued 

                                      B-13
<PAGE>
 
by a bank in exchange for the deposit of funds. The issuer agrees to pay the
amount deposited plus interest to the bearer of the receipt on the date
specified on the certificate. The certificate usually can be traded in the
secondary market prior to maturity.

     Bankers' acceptances typically arise from short-term credit arrangements
designed to enable businesses to obtain funds to finance commercial
transactions.  Generally, an acceptance is a time draft drawn on a bank by an
exporter or an importer to obtain a stated amount of funds to pay for specific
merchandise.  The draft is then "accepted" by another bank that, in effect,
unconditionally guarantees to pay the face value of the instrument on its
maturity date.  The acceptance may then be held by the accepting bank as an
earning asset or it may be sold in the secondary market at the going rate of
discount for a specific maturity.  Although maturities for acceptances can be as
long as 270 days, most maturities are six months or less.

     The Funds will generally open interest-bearing accounts only with, or
purchase certificates of deposit or bankers' acceptances only from, banks or
savings and loan associations whose deposits are federally-insured and whose
capital is at least $50 million.

     Corporate Obligations:  Corporate debt obligations (including master demand
notes).  For a further description of variable amount master demand notes, see
the section entitled "Commercial Paper" above.

     Repurchase Agreements and Reverse Repurchase Agreements:  See the sections
entitled "Repurchase Agreements" and "Reverse Repurchase Agreements" below.

REPURCHASE AGREEMENTS.  Each Fund may enter into repurchase agreements with
banks, brokers or securities dealers.  In such agreements, the seller agrees to
repurchase a security from a Fund at a mutually agreed-upon time and price.  The
period of maturity is usually quite short, either overnight or a few days
although it may extend over a number of months.  The repurchase price is in
excess of the purchase price, reflecting an agreed-upon rate of return effective
for the period of time a Fund's money is invested in the security.  Whenever a
Fund enters into a repurchase agreement, it obtains collateral having a market
value at least equal to 102% of the repurchase price, including accrued
interest.  However, a Fund may collateralize the amount of such transaction at
100% if the collateral is cash.  The instruments held as collateral are valued
daily and if the value of the instruments declines, a Fund will require
additional collateral.  If the seller defaults and the value of the collateral
securing the repurchase agreements declines, a Fund may incur a loss.  In
addition, if bankruptcy proceedings are commenced with respect to the seller of
the security, realization of the collateral by the Fund may be delayed or
limited.  The Trustees have established guidelines to be used by the Adviser in
connection with transactions in repurchase agreements and will regularly monitor
each Fund's use of repurchase agreements.  A Fund will not invest in repurchase
agreements maturing in more than seven days if the aggregate of such investments
along with other illiquid securities exceeds 10% of the value of its total
assets.  However,  for temporary defensive purposes, there is no limit on the
amount of a Fund's net assets that may be subject to repurchase agreements
having a maturity of seven days or less.

                                      B-14
<PAGE>
 
REVERSE REPURCHASE AGREEMENTS.  Each Fund may engage in reverse repurchase
agreements.  In a reverse repurchase agreement, the Fund sells a security and
agrees to repurchase it at a mutually agreed upon date and price, reflecting the
interest rate effective for the term of the agreement.  The Fund's investment of
the proceeds of a reverse repurchase agreement is the speculative factor known
as leverage.  The Funds will enter into a reverse repurchase agreement only if
the interest income from investment of the proceeds is expected to be greater
than the interest expense of the transaction and the proceeds are invested for a
period no longer than the term of the agreement.  The Fund will segregate with
the custodian cash or liquid securities in an amount at least equal to 102% of
its purchase obligations under these agreements (including accrued interest).
In the event that the buyer of securities under a reverse repurchase agreement
files for bankruptcy or becomes insolvent, the buyer or its trustee or receiver
may receive an extension of time to determine whether to enforce the Fund's
repurchase obligation, and the Fund's use of proceeds of the agreement may
effectively be restricted pending such decision.  Reverse repurchase agreements
are considered to be borrowings and are subject to the percentage limitations on
borrowings.  See "Investment Restrictions."

INTEREST-RATE SWAP TRANSACTIONS.  The Diversified Income and the High Income
Fund may enter into either asset-based interest-rate swaps or liability-based
interest-rate swaps, depending on whether it is hedging its assets or its
liabilities.  A Fund will usually enter into interest-rate swaps on a net basis,
i.e., the two payment streams are netted out, with the Fund receiving or paying,
as the case may be, only the net amount of the two payments.  Since these
hedging transactions are entered into for good faith hedging purposes and a
segregated account has been established, the Adviser believes such obligations
do not constitute senior securities and, accordingly, will not treat them as
being subject to the borrowing restrictions applicable to each Fund.  The net
amount of the excess, if any, of a Fund's obligations over its entitlements with
respect to each interest-rate swap will be accrued on a daily basis and an
amount of cash or liquid securities having an aggregate net asset value at least
equal to the accrued excess will be maintained in a segregated account by a
custodian that satisfies the requirements of the 1940 Act.  To the extent that a
Fund enters into interest-rate swaps on other than a net basis, the amount
maintained in a segregated account will be the full amount of the Fund's
obligations, if any, with respect to such interest-rate swaps, accrued on a
daily basis.  A Fund may pledge up to 5% of its net assets in connection with
interest-rate swap transactions.  A Fund will not enter into any interest-rate
swaps unless the unsecured senior debt or the claims-paying ability of the other
party thereto is rated in the highest rating category of at least one nationally
recognized rating organization at the time of entering into such transaction.
If there is a default by the other party to such transaction, a Fund will have
contractual remedies pursuant to the agreement related to the transaction.  The
swap market has grown substantially in recent years with a large number of banks
and investment banking firms acting both as principals and as agents utilizing
standardized swap documentation.  As a result, the swap market has become
relatively liquid.

     The use of interest-rate swaps is a highly speculative activity which
involves investment techniques and risks different from those associated with
ordinary portfolio securities transactions.  If incorrect in its forecast of
market values, interest rates and other applicable factors, the investment
performance of a Fund would diminish compared to what it would have been if this
investment technique was never used.

                                      B-15
<PAGE>
 
     A Fund may only enter into interest-rate swaps to hedge its portfolio.
Interest-rate swaps do not involve the delivery of securities or other
underlying assets or principal.  Accordingly, the risk of loss with respect to
interest-rates swaps is limited to the net amount of interest payments that a
Fund is contractually obligated to make.  If the other party to an interest-rate
swap defaults, a Fund's risk of loss consists of the net amount of interest
payments that the Fund is contractually entitled to receive. Since interest-rate
swaps are individually negotiated, a Fund expects to achieve an acceptable
degree of correlation between its rights to receive interest on its portfolio
securities and its rights and obligations to receive and pay interest pursuant
to interest-rate swaps.
    
WHEN-ISSUED AND DELAYED-DELIVERY SECURITIES.  Each Fund may purchase or sell
such securities on a "when-issued" or "delayed-delivery" basis.  Although a Fund
will enter into such transactions for the purpose of acquiring securities for
its portfolio or for delivery pursuant to options contracts it has entered into,
the Fund may dispose of a commitment prior to settlement.  "When-issued" or
"delayed-delivery" refers to securities whose terms and indenture are available
and for which a market exists, but which are not available for immediate
delivery.  When such transactions are negotiated, the price (which is generally
expressed in yield terms) is fixed at the time the commitment is made, but
delivery and payment for the securities take place at a later date.  During the
period between commitment by a Fund and settlement (generally within two months
but not to exceed 120 days), no payment is made for the securities purchased by
the purchaser, and no interest accrues to the purchaser from the transaction.
Such securities are subject to market fluctuation, and the value at delivery may
be less than the purchase price.  A Fund will maintain a segregated account with
its custodian, consisting of cash or liquid securities at least equal to the
value of purchase commitments until payment is made.  A Fund will likewise
segregate liquid assets in respect of securities sold on a delayed-delivery
basis.      

     A Fund will engage in when-issued transactions in order to secure what is
considered to be an advantageous price and yield at the time of entering into
the obligation.  When a Fund engages in when-issued or delayed-delivery
transactions, it relies on the buyer or seller, as the case may be, to
consummate the transaction.  Failure to do so may result in a Fund losing the
opportunity to obtain a price and yield considered to be advantageous.  If a
Fund chooses to (i) dispose of the right to acquire a when-issued security prior
to its acquisition or (ii) dispose of its right to deliver or receive against a
forward commitment, it may incur a gain or loss.  (At the time a Fund makes a
commitment to purchase or sell a security on a when-issued or forward commitment
basis, it records the transaction and reflects the value of the security
purchased, or if a sale, the proceeds to be received in determining its net
asset value.)

     To the extent a Fund engages in when-issued and delayed-delivery
transactions, it will do so for the purpose of acquiring or selling securities
consistent with its investment objectives and policies and not for the purposes
of investment leverage.  A Fund enters into such transactions only with the
intention of actually receiving or delivering the securities, although (as noted
above) when-issued securities and forward commitments may be sold prior to the
settlement date.  In addition, changes in interest rates in a direction other
than that expected by the Adviser before settlement, will affect the value of
such securities and may cause a loss to a Fund.

                                      B-16
<PAGE>
 
     When-issued transactions and forward commitments may be used to offset
anticipated changes in interest rates and prices.  For instance, in periods of
rising interest rates and falling prices, a Fund might sell securities in its
portfolio on a forward commitment basis to attempt to limit its exposure to
anticipated falling prices.  In periods of falling interest rates and rising
prices, a Fund might sell portfolio securities and purchase the same or similar
securities on a when-issued or forward commitment basis, thereby obtaining the
benefit of currently higher cash yields.

WHEN, AS AND IF ISSUED SECURITIES.  Each Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization or debt restructuring.  The commitment for the purchase
of any such security will not be recognized until the Adviser determines that
issuance of the security is probable.  At such time, each Fund will record the
transaction, and in determining its net asset value, will reflect the value of
the security daily.  At such time, each Fund will also establish a segregated
account with its custodian in which it will maintain cash or liquid securities
equal in value to recognized commitments for such securities.  The value of a
Fund's commitments to purchase the securities of any one issuer, together with
the value of all securities of such issuer owned by a Fund, may not exceed 5% of
the value of the Fund's total assets at the time the initial commitment to
purchase such securities is made.  Subject to the foregoing restrictions, each
Fund may purchase securities on such basis without limit.  An increase in the
percentage of a Fund's assets committed to the purchase of securities on a when,
as and if issued basis, may increase the volatility of its net asset value.  The
Adviser does not believe that the net asset value of the Funds will be adversely
affected by its purchase of securities on such basis.

LOANS OF PORTFOLIO SECURITIES.  Consistent with applicable regulatory
requirements, each Fund may lend portfolio securities in amounts up to 33% of
total assets to brokers, dealers and other financial institutions, provided that
                                                                   -------- ----
such loans are callable at any time by the Fund and are at all times secured by
cash or equivalent collateral that is equal to at least 102% of the market
value, determined daily, of the loaned securities.  In lending its portfolio
securities, a Fund receives income while retaining the securities' potential for
capital appreciation.  The advantage of such loans is that a Fund continues to
receive the interest and dividends on the loaned securities while at the same
time earning interest on the collateral, which will generally be invested in
short-term obligations.  A loan may be terminated by the borrower on one
business day's notice or by a Fund at any time.  If the borrower fails to
maintain the requisite amount of collateral, the loan automatically terminates,
and the Fund could use the collateral to replace the securities while holding
the borrower liable for any excess of replacement cost over collateral.  As with
any extensions of credit, there are risks of delay in recovery and in some
cases, even loss of rights in the collateral should the borrower of the
securities fail financially.  However, these loans of portfolio securities will
only be made to firms deemed by the Adviser to be creditworthy.  On termination
of the loan, the borrower is required to return the securities to a Fund; and
any gain or loss in the market price of the loaned security during the loan
would inure to the Fund.  Each Fund will pay reasonable finders', administrative
and custodial fees in connection with a loan of its securities or may share the
interest earned on collateral with the borrower.

                                      B-17
<PAGE>
 
     Since voting or consent rights which accompany loaned securities pass to
the borrower, each Fund will follow the policy of calling the loan in whole or
in part, as may be appropriate, to permit the exercise of such rights if the
matters involved would have a material effect on the Fund's investment in the
securities which are the subject of the loan.

PREFERRED STOCKS.  The Diversified Income Fund's investment in fixed income
securities issued by domestic corporations may include preferred stocks.  In
addition, up to 20% of the High Income Fund's total assets may be invested in
common stocks, preferred stocks, or other equity securities.  Dividends on some
preferred stock may be "cumulative" if stated dividends from prior periods have
not been paid. Preferred stock generally has a preference over common stock on
the distribution of a corporation's assets in the event of liquidation of the
corporation, and may be "participating," which means that it may be entitled to
a dividend exceeding the stated dividend in certain cases.  The rights of
preferred stock are generally subordinate to rights associated with a
corporation's debt securities.

WARRANTS AND RIGHTS.  The Diversified Income Fund may invest up to 5% of its
total assets (at the time of purchase) in warrants and rights.  The Fund will
invest only in those warrants or rights: (i) acquired as part of a unit or
attached to other securities purchased by the Fund; or (ii) acquired as part of
a distribution from the issuer.  Warrants basically are options to purchase
equity securities at specific prices valid for a specific period of time.
Prices of warrants do not necessarily move parallel to the prices of the
underlying securities.  Rights are similar to warrants but normally have a short
duration and are distributed by the issuer to its shareholders.  Warrants and
rights have no voting rights, pay no dividends and confer no rights, other than
the right to purchase the underlying stock, with respect to the assets of the
issuer.

PAY-IN-KIND BONDS.  Investments of the Diversified Income Fund, the High Income
Fund and the Federal Securities Fund in fixed-income securities may include pay-
in-kind bonds.  These are securities which pay interest in either cash or
additional securities, at the issuer's option, for a specified period. Pay-in-
kind bonds, like zero-coupon bonds, are designed to give an issuer flexibility
in managing cash flow.  Pay-in-kind bonds can be either senior or subordinated
debt and trade flat (i.e., without accrued interest).  The price of pay-in-kind
bonds is expected to reflect the market value of the underlying debt plus an
amount representing accrued interest since the last payment.  Pay-in-kind bonds
are usually less volatile than zero-coupon bonds, but more volatile than cash
pay securities.

INCOME ENHANCEMENT STRATEGIES.  Each Fund may write (i.e., sell) call options
("calls") on securities that are traded on U.S. and foreign securities exchanges
and over-the-counter markets to enhance income through the receipt of premiums
from expired calls and any net profits from closing purchase transactions.
After any such sale up to 100% of a Fund's total assets may be subject to calls.
All such calls written by a Fund must be "covered" while the call is outstanding
(i.e., the Fund must own the securities subject to the call or other securities
acceptable for applicable escrow requirements).  Calls on Futures (defined
below) used to enhance income,  must be covered by deliverable securities or by
liquid assets segregated to satisfy the Futures contract.  If a call written by
the Fund is exercised, the Fund forgoes any profit from any increase in the
market price above the call price of the underlying investment on which the call
was written.  In addition, the Fund could experience capital losses which 

                                      B-18
<PAGE>
 
might cause previously distributed short-term capital gains to be re-
characterized as a non-taxable return of capital to shareholders.

HEDGING STRATEGIES.  For hedging purposes as a temporary defensive maneuver, the
Diversified Income Fund and the High Income Fund may use forward contracts on
forward currencies ("Forward Contracts") and each Fund may use interest-rate
futures contracts, foreign currency futures contracts, and stock and bond index
futures contracts (together, "Futures"), as well as call and put options on
equity and debt securities, Futures, stock and bond indices and foreign
currencies (all the foregoing referred to as "Hedging Instruments"); except that
the Government Securities Fund, the Federal Securities Fund and the Tax Exempt
Insured Fund may not engage in foreign currency Futures and options thereon.
Hedging Instruments may be used to attempt to: (i) protect against possible
declines in the market value of a Fund's portfolio resulting from downward
trends in the equity and debt securities markets (generally due to a rise in
interest rates); (ii) protect a Fund's unrealized gains in the value of its
equity and debt securities which have appreciated; (iii) facilitate selling
securities for investment reasons; (iv) establish a position in the equity and
debt securities markets as a temporary substitute for purchasing particular
equity and debt securities; or (v) reduce the risk of adverse currency
fluctuations.

     A Fund's strategy of hedging with Futures and options on Futures will be
incidental to its activities in the underlying cash market.  When hedging to
attempt to protect against declines in the market value of a Fund's portfolio,
to permit a Fund to retain unrealized gains in the value of portfolio securities
which have appreciated, or to facilitate selling securities for investment
reasons, a Fund could: (i) sell Futures; (ii) purchase puts on such Futures or
securities; or (iii) write calls on securities held by it or on Futures.  When
hedging to attempt to protect against the possibility that portfolio securities
are not fully included in a rise in value of the debt securities market, a Fund
could:  (i) purchase Futures, or (ii) purchase calls on such Futures or on
securities.  When hedging to protect against declines in the dollar value of a
foreign currency-denominated security, the Diversified Income Fund and the High
Income Fund could:  (i) purchase puts on that foreign currency and on foreign
currency Futures; (ii) write calls on that currency or on such Futures; or (iii)
enter into Forward Contracts at a lower rate than the spot ("cash") rate.
Additional information about the Hedging Instruments the Funds may use is
provided below.

OPTIONS
- -------

     Options on Securities.  As noted above, each Fund may write and purchase
call and put options on equity and debt securities.

     When a Fund writes a call on a security, it receives a premium and agrees
to sell the underlying security to a purchaser of a corresponding call on the
same security during the call period (usually not more than 9 months) at a fixed
price (which may differ from the market price of the underlying security),
regardless of market price changes during the call period.  A Fund has retained
the risk of loss should the price of the underlying security decline during the
call period, which may be offset to some extent by the premium.

                                      B-19
<PAGE>
 
     To terminate its obligation on a call it has written, a Fund may purchase a
corresponding call in a "closing purchase transaction."  A profit or loss will
be realized, depending upon whether the net of the amount of the option
transaction costs and the premium received on the call written was more or less
than the price of the call subsequently purchased.  A profit may also be
realized if the call expires unexercised, because a Fund retains the underlying
security and the premium received.  Any such profits are considered short-term
capital gains for Federal income tax purposes, and when distributed by the Fund,
are taxable as ordinary income.  If a Fund could not effect a closing purchase
transaction due to lack of a market, it would hold the callable securities until
the call expired or was exercised.

     When a Fund purchases a call (other than in a closing purchase
transaction), it pays a premium and has the right to buy the underlying
investment from a seller of a corresponding call on the same investment during
the call period at a fixed exercise price.  A Fund benefits only if the call is
sold at a profit or if, during the call period, the market price of the
underlying investment is above the sum of the call price plus the transaction
costs and the premium paid and the call is exercised.  If the call is not
exercised or sold (whether or not at a profit), it will become worthless at its
expiration date and a Fund will lose its premium payment and the right to
purchase the underlying investment.

     A put option on securities gives the purchaser the right to sell, and the
writer the obligation to buy, the underlying investment at the exercise price
during the option period.  Writing a put covered by segregated liquid assets
equal to the exercise price of the put, has the same economic effect to a Fund
as writing a covered call.  The premium a Fund receives from writing a put
option represents a profit as long as the price of the underlying investment
remains above the exercise price.  However, a Fund has also assumed the
obligation during the option period to buy the underlying investment from the
buyer of the put at the exercise price, even though the value of the investment
may fall below the exercise price.  If the put expires unexercised, a Fund (as
the writer of the put) realizes a gain in the amount of the premium.  If the put
is exercised, a Fund must fulfill its obligation to purchase the underlying
investment at the exercise price, which will usually exceed the market value of
the investment at that time.  In that case, a Fund may incur a loss, equal to
the sum of the sale price of the underlying investment and the premium received
minus the sum of the exercise price and any transaction costs incurred.

     A Fund may effect a closing purchase transaction to realize a profit on an
outstanding put option it has written or to prevent an underlying security from
being put.  Furthermore, effecting such a closing purchase transaction will
permit a Fund to write another put option to the extent that the exercise price
thereof is secured by the deposited assets, or to utilize the proceeds from the
sale of such assets for other investments by the Fund.  A Fund will realize a
profit or loss from a closing purchase transaction if the cost of the
transaction is less or more than the premium received from writing the option.
As described above, for writing covered calls, any and all such profits
described herein from writing puts are considered short-term gains for Federal
tax purposes, and when distributed by a Fund, are taxable as ordinary income.

     When a Fund purchases a put, it pays a premium and has the right to sell
the underlying investment to a seller of a corresponding put on the same
investment during the put period at a fixed 

                                      B-20
<PAGE>
 
exercise price. Buying a put on an investment a Fund owns enables the Fund to
protect itself during the put period against a decline in the value of the
underlying investment below the exercise price by selling such underlying
investment at the exercise price to a seller of a corresponding put. If the
market price of the underlying investment is equal to or above the exercise
price and as a result the put is not exercised or resold, the put will become
worthless at its expiration date, and the Fund will lose its premium payment and
the right to sell the underlying investment pursuant to the put. The put may,
however, be sold prior to expiration (whether or not at a profit.)

     Buying a put on an investment a Fund does not own permits the Fund either
to resell the put or buy the underlying investment and sell it at the exercise
price.  The resale price of the put will vary inversely with the price of the
underlying investment.  If the market price of the underlying investment is
above the exercise price and as a result the put is not exercised, the put will
become worthless on its expiration date.  In the event of a decline in the stock
market, a Fund could exercise or sell the put at a profit to attempt to offset
some or all of its loss on its portfolio securities.

     When writing put options on securities, to secure its obligation to pay for
the underlying security, a Fund will deposit in escrow liquid assets with a
value equal to or greater than the exercise price of the underlying securities.
A Fund therefore forgoes the opportunity of investing the segregated assets or
writing calls against those assets.  As long as the obligation of a Fund as the
put writer continues, it may be assigned an exercise notice by the broker-dealer
through whom such option was sold, requiring a Fund to take delivery of the
underlying security against payment of the exercise price. A Fund has no control
over when it may be required to purchase the underlying security, since it may
be assigned an exercise notice at any time prior to the termination of its
obligation as the writer of the put.  This obligation terminates upon expiration
of the put, or such earlier time at which a Fund effects a closing purchase
transaction by purchasing a put of the same series as that previously sold.
Once a Fund has been assigned an exercise notice, it is thereafter not allowed
to effect a closing purchase transaction.

     Options on Foreign Currencies.  The Diversified Income Fund and the High
Income Fund may write and purchase calls on foreign currencies.  A call written
by a Fund on a foreign currency is "covered" if the Fund owns the underlying
foreign currency covered by the call or has an absolute and immediate right to
acquire that foreign currency without additional cash consideration (or for
additional cash consideration held in a segregated account by its custodian)
upon conversion or exchange of other foreign currency held in its portfolio.  A
call written by a Fund on a foreign currency is for cross-hedging purposes if it
is not covered, but is designed to provide a hedge against a decline in the U.S.
dollar value of a security which the Fund owns or has the right to acquire and
which is denominated in the currency underlying the option due to an adverse
change in the exchange rate.  In such circumstances, a Fund collateralizes the
option by maintaining in a segregated account with the Fund's custodian, cash or
liquid securities in an amount not less than the value of the underlying foreign
currency in U.S. dollars marked-to-market daily.

     Options on Securities Indices.  As noted above, each Fund may write and
purchase call and put options on securities indices.  Puts and calls on broadly-
based securities indices are similar to puts and 

                                      B-21
<PAGE>
 
calls on securities except that all settlements are in cash and gain or loss
depends on changes in the index in question (and thus on price movements in the
securities market generally) rather than on price movements in individual
securities or Futures. When a Fund buys a call on a securities index, it pays a
premium. During the call period, upon exercise of a call by a Fund, a seller of
a corresponding call on the same investment will pay the Fund an amount of cash
to settle the call if the closing level of the securities index upon which the
call is based is greater than the exercise price of the call. That cash payment
is equal to the difference between the closing price of the index and the
exercise price of the call times a specified multiple (the "multiplier") which
determines the total dollar value for each point of difference. When a Fund buys
a put on a securities index, it pays a premium and has the right during the put
period to require a seller of a corresponding put, upon the Fund's exercise of
its put, to deliver to the Fund an amount of cash to settle the put if the
closing level of the securities index upon which the put is based is less than
the exercise price of the put. That cash payment is determined by the
multiplier, in the same manner as described above pertaining to calls.

FUTURES AND OPTIONS ON FUTURES
- ------------------------------

     Futures.  Upon entering into a Futures transaction, a Fund will be required
to deposit an initial margin payment with the futures commission merchant (the
"futures broker").  The initial margin payment will be deposited with the Fund's
custodian in an account registered in the futures broker's name; however, the
futures broker can gain access to that account only under specified conditions.
As the Future is marked-to-market to reflect changes in its market value,
subsequent margin payments, called variation margin, will be paid to or by the
futures broker on a daily basis.  Prior to expiration of the Future, if a Fund
elects to close out its position by taking an opposite position, a final
determination of variation margin is made, additional cash is required to be
paid by or released to the Fund, and any loss or gain is realized for tax
purposes.  All Futures transactions are effected through a clearinghouse
associated with the exchange on which the Futures are traded.

     Interest-rate futures contracts are purchased or sold for hedging purposes
to attempt to protect against the effects of interest rate changes on a Fund's
current or intended investments in fixed-income securities.  For example, if a
Fund owned long-term bonds and interest rates were expected to increase, that
Fund might sell interest-rate futures contracts.  Such a sale would have much
the same effect as selling some of the long-term bonds in that Fund's portfolio.
However, since the Futures market is more liquid than the cash market, the use
of interest-rate futures contracts as a hedging technique allows a Fund to hedge
its interest rate risk without having to sell its portfolio securities.  If
interest rates did increase, the value of the debt securities in the portfolio
would decline, but the value of that Fund's interest-rate futures contracts
would be expected to increase at approximately the same rate, thereby keeping
the net asset value of that Fund from declining as much as it otherwise would
have. On the other hand, if interest rates were expected to decline, interest-
rate futures contracts may be purchased to hedge in anticipation of subsequent
purchases of long-term bonds at higher prices.  Since the fluctuations in the
value of the interest-rate futures contracts should be similar to that of long-
term bonds, a Fund could protect itself against the effects of the anticipated
rise in the value of long-term bonds without actually buying them until the
necessary cash became available or the market had

                                      B-22
<PAGE>
 
stabilized.  At that time, the interest-rate futures contracts could be
liquidated and that Fund's cash reserves could then be used to buy long-term
bonds on the cash market.

     Purchases or sales of stock or bond index futures contracts are used for
hedging purposes to attempt to protect a Fund's current or intended investments
from broad fluctuations in stock or bond prices.  For example, a Fund may sell
stock or bond index futures contracts in anticipation of or during a market
decline to attempt to offset the decrease in market value of the Fund's
securities portfolio that might otherwise result.  If such decline occurs, the
loss in value of portfolio securities may be offset, in whole or part, by gains
on the Futures position.  When a Fund is not fully invested in the securities
market and anticipates a significant market advance, it may purchase stock or
bond index futures contracts in order to gain rapid market exposure that may, in
part or entirely, offset increases in the cost of securities that the Fund
intends to purchase.  As such purchases are made, the corresponding positions in
stock or bond index futures contracts will be closed out.

     As noted above, the Diversified Income Fund and the High Income Fund may
purchase and sell foreign currency futures contracts for hedging purposes to
attempt to protect current or intended investments from fluctuations in currency
exchange rates.  Such fluctuations could reduce the dollar value of portfolio
securities denominated in foreign currencies, or increase the cost of foreign-
denominated securities to be acquired, even if the value of such securities in
the currencies in which they are denominated remains constant.  A Fund may sell
futures contracts on a foreign currency, for example, when it holds securities
denominated in such currency and it anticipates a decline in the value of such
currency relative to the dollar.  In the event such decline occurs, the
resulting adverse effect on the value of foreign-denominated securities may be
offset, in whole or in part, by gains on the Futures contracts.  However, if the
value of the foreign currency increases relative to the dollar, a Fund's loss on
the foreign currency futures contract may or may not be offset by an increase in
the value of the securities since a decline in the price of the security stated
in terms of the foreign currency may be greater than the increase in value as a
result of the change in exchange rates.

     Conversely, a Fund could protect against a rise in the dollar cost of
foreign-denominated securities to be acquired by purchasing Futures contracts on
the relevant currency, which could offset, in whole or in part, the increased
cost of such securities resulting from a rise in the dollar value of the
underlying currencies.  When a Fund purchases futures contracts under such
circumstances, however, and the price of securities to be acquired instead
declines as a result of appreciation of the dollar, the Fund will sustain losses
on its futures position which could reduce or eliminate the benefits of the
reduced cost of portfolio securities to be acquired.

     Options on Futures.  As noted above, each Fund may purchase and write
options on interest-rate futures contracts and stock and bond index futures
contracts, and the Diversified Income Fund and the High Income Fund may purchase
and write options on foreign currency futures contracts.  (Unless otherwise
specified, options on interest-rate futures contracts, options on stock and bond
index futures contracts and options on foreign currency futures contracts are
collectively referred to as "Options on Futures.")

                                      B-23
<PAGE>
 
     The writing of a call option on a Futures contract constitutes a partial
hedge against declining prices of the securities in a Fund's portfolio.  If the
Futures price at expiration of the option is below the exercise price, the Fund
will retain the full amount of the option premium, which provides a partial
hedge against any decline that may have occurred in the Fund's portfolio
holdings.  The writing of a put option on a Futures contract constitutes a
partial hedge against increasing prices of the securities or other instruments
required to be delivered under the terms of the Futures contract.  If the
Futures price at expiration of the put option is higher than the exercise price,
a Fund will retain the full amount of the option premium which provides a
partial hedge against any increase in the price of securities which the Fund
intends to purchase.  If a put or call option a Fund has written is exercised,
the Fund will incur a loss which will be reduced by the amount of the premium it
receives.  Depending on the degree of correlation between changes in the value
of its portfolio securities and changes in the value of its Options on Futures
positions, a Fund's losses from exercised Options on Futures may to some extent
be reduced or increased by changes in the value of portfolio securities.

     A Fund may purchase Options on Futures for hedging purposes, instead of
purchasing or selling the underlying Futures contract.  For example, where a
decrease in the value of portfolio securities is anticipated as a result of a
projected market-wide decline or changes in interest or exchange rates, a Fund
could, in lieu of selling a Futures contract, purchase put options thereon.  In
the event that such decrease occurs, it may be offset, in whole or part, by a
profit on the option.  If the market decline does not occur, the Fund will
suffer a loss equal to the price of the put.  Where it is projected that the
value of securities to be acquired by a Fund will increase prior to acquisition,
due to a market advance or changes in interest or exchange rates, a Fund could
purchase call Options on Futures, rather than purchasing the underlying Futures
contract.  If the market advances, the increased cost of securities to be
purchased may be offset by a profit on the call.  However, if the market
declines, the Fund will suffer a loss equal to the price of the call but the
securities which the Fund intends to purchase may be less expensive.

FORWARD CONTRACTS
- -----------------

     The Diversified Income Fund and the High Income Fund may use Forward
Contracts.  A Forward Contract involves bilateral obligations of one party to
purchase, and another party to sell, a specific currency at a future date (which
may be any fixed number of days from the date of the contract agreed upon by the
parties), at a price set at the time the contract is entered into.  These
contracts are traded in the interbank market conducted directly between currency
traders (usually large commercial banks) and their customers.  No price is paid
or received upon the purchase or sale of a Forward Contract.

     A Fund may use Forward Contracts to protect against uncertainty in the
level of future exchange rates.  The use of Forward Contracts does not eliminate
fluctuations in the prices of the underlying securities a Fund owns or intends
to acquire, but it does fix a rate of exchange in advance. In addition, although
Forward Contracts limit the risk of loss due to a decline in the value of the
hedged currencies, at the same time they limit any potential gain that might
result should the value of the

                                      B-24
<PAGE>
 
currencies' increase.  A Fund will not speculate with Forward Contracts or
foreign currency exchange rates.

     A Fund may enter into Forward Contracts with respect to specific
transactions.  For example, when a Fund enters into a contract for the purchase
or sale of a security denominated in a foreign currency, or when a Fund
anticipates receipt of dividend payments in a foreign currency, the Fund may
desire to "lock-in" the U.S. dollar price of the security or the U.S. dollar
equivalent of such payment by entering into a Forward Contract, for a fixed
amount of U.S. dollars per unit of foreign currency, for the purchase or sale of
the amount of foreign currency involved in the underlying transaction.  A Fund
will thereby be able to protect itself against a possible loss resulting from an
adverse change in the relationship between the currency exchange rates during
the period between the date on which the security is purchased or sold, or on
which the payment is declared, and the date on which such payments are made or
received.

     A Fund may also use Forward Contracts to lock in the U.S. dollar value of
portfolio positions ("position hedge").  In a position hedge, for example, when
a Fund believes that foreign currency may suffer a substantial decline against
the U.S. dollar, it may enter into a Forward Contract to sell an amount of that
foreign currency approximating the value of some or all of the Fund's portfolio
securities denominated in such foreign currency, or when a Fund believes that
the U.S. dollar may suffer a substantial decline against a foreign currency, it
may enter into a Forward Contract to buy that foreign currency for a fixed
dollar amount.  In this situation a Fund may, in the alternative, enter into a
Forward Contract to sell a different foreign currency for a fixed U.S. dollar
amount where the Fund believes that the U.S. dollar value of the currency to be
sold pursuant to the forward contract will fall whenever there is a decline in
the U.S. dollar value of the currency in which portfolio securities of the Fund
are denominated ("cross-hedged").

     The Fund's custodian will place cash or  liquid securities in a separate
account of the Fund having a value equal to the aggregate amount of the Fund's
commitments under Forward Contracts entered into with respect to position hedges
and cross-hedges to the extent that such positions are not otherwise covered.
If the value of the securities placed in a separate account declines, additional
cash or securities will be placed in the account on a daily basis so that the
value of the account will equal the amount of the Fund's commitments with
respect to such contracts.  As an alternative to maintaining all or part of the
separate account, a Fund may purchase a call option permitting the Fund to
purchase the amount of foreign currency being hedged by a forward sale contract
at a price no higher than the Forward Contract price or the Fund may purchase a
put option permitting the Fund to sell the amount of foreign currency subject to
a forward purchase contract at a price as high or higher than the Forward
Contract price.  Unanticipated changes in currency prices may result in poorer
overall performance for a Fund than if it had not entered into such contracts.

     The precise matching of the Forward Contract amounts and the value of the
securities involved will not generally be possible because the future value of
such securities in foreign currencies will change as a consequence of market
movements in the value of these securities between the date the Forward Contract
is entered into and the date it is sold.  Accordingly, it may be necessary for a
Fund 

                                      B-25
<PAGE>
 
to purchase additional foreign currency on the spot (i.e., cash) market (and
bear the expense of such purchase), if the market value of the security is less
than the amount of foreign currency a Fund is obligated to deliver and if a
decision is made to sell the security and make delivery of the foreign currency.
Conversely, it may be necessary to sell on the spot market some of the foreign
currency received upon the sale of the portfolio security if its market value
exceeds the amount of foreign currency a Fund is obligated to deliver. The
projection of short-term currency market movements is extremely difficult, and
the successful execution of a short-term hedging strategy is highly uncertain.
Forward Contracts involve the risk that anticipated currency movements will not
be accurately predicted, causing a Fund to sustain losses on these contracts and
transactions costs.

     At or before the maturity of a Forward Contract requiring a Fund to sell a
currency, the Fund may either sell a portfolio security and use the sale
proceeds to make delivery of the currency or retain the security and offset its
contractual obligation to deliver the currency by purchasing a second contract
pursuant to which the Fund will obtain, on the same maturity date, the same
amount of the currency that it is obligated to deliver.  Similarly, a Fund may
close out a Forward Contract requiring it to purchase a specified currency by
entering into a second contract entitling it to sell the same amount of the same
currency on the maturity date of the first contract.  A Fund would realize a
gain or loss as a result of entering into such an offsetting Forward Contract
under either circumstance to the extent the exchange rate or rates between the
currencies involved moved between the execution dates of the first contract and
offsetting contract.

     The cost to a Fund of engaging in Forward Contracts varies with factors
such as the currencies involved, the length of the contract period and the
market conditions then prevailing.  Because Forward Contracts are usually
entered into on a principal basis, no fees or commissions are involved.  Because
such contracts are not traded on an exchange, a Fund must evaluate the credit
and performance risk of each particular counterparty under a Forward Contract.

     Although a Fund values its assets daily in terms of U.S. dollars, it does
not intend to convert its holdings of foreign currencies into U.S. dollars on a
daily basis.  A Fund may convert foreign currency from time to time, and
investors should be aware of the costs of currency conversion.  Foreign exchange
dealers do not charge a fee for conversion, but they do seek to realize a profit
based on the difference between the prices at which they buy and sell various
currencies.  Thus, a dealer may offer to sell a foreign currency to a Fund at
one rate, while offering a lesser rate of exchange should the Fund desire to
resell that currency to the dealer.

ADDITIONAL INFORMATION ABOUT HEDGING INSTRUMENTS AND THEIR USE
- --------------------------------------------------------------

     The Fund's custodian, or a securities depository acting for the custodian,
will act as the Fund's escrow agent through the facilities of the Options
Clearing Corporation ("OCC"), as to the securities on which the Fund has written
options or as to other acceptable escrow securities, so that no margin will be
required for such transaction.  OCC will release the securities on the
expiration of the option or upon a Fund's entering into a closing transaction.

                                      B-26
<PAGE>
 
     An option position may be closed out only on a market which provides
secondary trading for options of the same series and there is no assurance that
a liquid secondary market will exist for any particular option.  A Fund's option
activities may affect its turnover rate and brokerage commissions. The exercise
by a Fund of puts on securities will cause the sale of related investments, thus
increasing portfolio turnover.  Although such exercise is within a Fund's
control, holding a put might cause the Fund to sell the related investments for
reasons which would not exist in the absence of the put.  A Fund will pay a
brokerage commission each time it buys a put or call, sells a call, or buys or
sells an underlying investment in connection with the exercise of a put or call.
Such commissions may be higher than those which would apply to direct purchases
or sales of such underlying investments.  Premiums paid for options are small in
relation to the market value of the related investments, and consequently, put
and call options offer large amounts of leverage.  The leverage offered by
trading in options could result in a Fund's net asset value being more sensitive
to changes in the value of the underlying investments.

     In the future, each Fund may employ Hedging Instruments and strategies that
are not presently contemplated but which may be developed, to the extent such
investment methods are consistent with a Fund's investment objectives, legally
permissible and adequately disclosed.

REGULATORY ASPECTS OF HEDGING INSTRUMENTS
- -----------------------------------------

     Each Fund must operate within certain restrictions as to its long and short
positions in Futures and options thereon, under a rule (the "CFTC Rule") adopted
by the Commodity Futures Trading Commission (the "CFTC") under the Commodity
Exchange Act (the "CEA"), which excludes the Fund from registration with the
CFTC as a "commodity pool operator" (as defined in the CEA) if it complies with
the CFTC Rule.  In particular, the Fund may (i) purchase and sell Futures and
options thereon for bona fide hedging purposes, as defined under CFTC
regulations, without regard to the percentage of the Fund's assets committed to
margin and option premiums, and (ii) enter into non-hedging transactions,
provided that the Fund may not enter into such non-hedging transactions if,
immediately thereafter, the sum of the amount of initial margin deposits on the
Fund's existing Futures positions and option premiums would exceed 5% of the net
assets of its portfolio, after taking into account unrealized profits and
unrealized losses on any such transactions.  However, the Fund intends to engage
in Futures transactions and options thereon only for hedging purposes.  Margin
deposits may consist of cash or securities acceptable to the broker and the
relevant contract market.

     Transactions in options by a Fund are subject to limitations established by
each of the exchanges governing the maximum number of options which may be
written or held by a single investor or group of investors acting in concert,
regardless of whether the options were written or purchased on the same or
different exchanges or are held in one or more accounts or through one or more
exchanges or brokers.  Thus, the number of options which a Fund may write or
hold may be affected by options written or held by other entities, including
other investment companies having the same or an affiliated investment adviser.
Position limits also apply to Futures.  An exchange may order the liquidation of
positions found to be in violation of those limits and may impose certain other
sanctions.  Due to requirements under the 1940 Act, when a Fund purchases a
Future, the Fund will maintain, in a 

                                      B-27
<PAGE>
 
segregated account or accounts with its custodian, cash or liquid securities in
an amount equal to the market value of the securities underlying such Future,
less the margin deposit applicable to it.

         
POSSIBLE RISK FACTORS IN HEDGING
- --------------------------------

     In addition to the risks discussed in the Prospectus and above, there is a
risk in using short hedging by selling Futures to attempt to protect against
decline in value of a Fund's portfolio securities (due to an increase in
interest rates) that the prices of such Futures will correlate imperfectly with
the behavior of the cash (i.e., market value) prices of the Fund's securities.
The ordinary spreads between prices in the cash and Futures markets are subject
to distortions due to differences in the natures of those markets.  First, all
participants in the Futures markets are subject to margin deposit and
maintenance requirements.  Rather than meeting additional margin deposit
requirements, investors may close Futures contracts through offsetting
transactions which could distort the normal relationship between the cash and
Futures markets.  Second, the liquidity of the Futures markets depend on
participants entering into offsetting transactions rather than making or taking
delivery.  To the extent participants decide to make or take delivery, liquidity
in the Futures markets could be reduced, thus producing distortion.  Third, from
the point of view of speculators, the deposit requirements in the Futures
markets are less onerous than margin requirements in the securities markets.
Therefore, increased participation by speculators in the Futures markets may
cause temporary price distortions.

     If a Fund uses Hedging Instruments to establish a position in the debt
securities markets as a temporary substitute for the purchase of individual debt
securities (long hedging) by buying Futures and/or calls on such Futures or on
debt securities, it is possible that the market may decline; if the Adviser then
determines not to invest in such securities at that time because of concerns as
to possible further market decline or for other reasons, the Fund will realize a
loss on the Hedging Instruments that is not offset by a reduction in the price
of the debt securities purchased.

LEVERAGE.  In seeking to enhance investment performance, the Federal Securities
Fund, Diversified Income Fund and High Income Fund may each increase its
ownership of securities by borrowing from banks at fixed rates of interest and
investing the borrowed funds, subject to the restrictions stated in the
Prospectus.  Any such borrowing will be made only from banks and pursuant to the
requirements of the 1940 Act and will be made only to the extent that the value
of the Fund's asset less its liabilities other than borrowings, is equal to at
least 300% of all borrowings including the proposed borrowing. If the value of a
Fund's asset so computed should fail to meet the 300% asset coverage
requirement, the Fund is required, within three business days, to reduce its
bank debt to the extent necessary to meet such requirement and may have to sell
a portion of its investments at a time when independent investment judgment
would not dictate such sale.  Interest on money borrowed is an expense the Fund
would not otherwise incur, so that it may have little or no net investment
income during periods of substantial borrowings.  Since substantially all of the
Fund's assets fluctuate in value, but borrowing obligations are fixed when the
Fund has outstanding borrowings, the net asset value per share of the Fund
correspondingly will tend to increase and decrease more when the Fund's assets
increase or decrease in value than would otherwise be the case.  The Fund's
policy regarding use of leverage is a fundamental policy which may not be
changed without approval of the shareholders of the Fund.

                                      B-28
<PAGE>
 
HIGH-YIELD/HIGH-RISK SECURITIES.  The Diversified Income Fund may, and the High
Income Fund will, invest in lower-rated bonds commonly referred to as "junk
bonds."  These securities are rated "Baa" or lower by Moody's Investors Service,
Inc. ("Moody's")  or "BBB"  or lower by  Standard Poor's Rating Services, a
division of the McGraw-Hill Companies, Inc. ("S&P").  Each Fund may invest in
securities rated as low as "C" by Moody's or "D" by S&P.  These ratings indicate
that the obligations are speculative and may be in default.  In addition, each
such Fund may invest in unrated securities subject to the restrictions stated in
the Prospectus.

     Certain Risk Factors Relating to High-Yield, High-Risk Securities.  The
descriptions below are intended to supplement the discussion in the Prospectus
entitled "Risk Factors -- High-Yield/High- Risk Securities."

     GROWTH OF HIGH-YIELD, HIGH-RISK BOND MARKET.  The widespread expansion of
     -------------------------------------------                              
government, consumer and corporate debt within the U.S. economy has made the
corporate sector more vulnerable to economic downturns or increased interest
rates.  Further, an economic downturn could severely disrupt the market for
high-yield, high-risk bonds and adversely affect the value of outstanding bonds
and the ability of the issuers to repay principal and interest.

     SENSITIVITY TO INTEREST RATE AND ECONOMIC CHANGES.   High-yield, high-risk
     -------------------------------------------------                         
bonds are very sensitive to adverse economic changes and corporate developments.
During an economic downturn or substantial period of rising interest rates,
highly leveraged issuers may experience financial stress that would adversely
affect their ability to service their principal and interest payment
obligations, to meet projected business goals, and to obtain additional
financing.  If the issuer of a bond defaulted on its obligations to pay interest
or principal or entered into bankruptcy proceedings, a Fund may incur losses or
expenses in seeking recovery of amounts owed to it.  In addition, periods of
economic uncertainty and change can be expected to result in increased
volatility of market prices of high-yield, high-risk bonds and a Fund's net
asset value.

     PAYMENT EXPECTATIONS.   High-yield, high-risk bonds may contain redemption
     --------------------                                                      
or call provisions.  If an issuer exercised these provisions in a declining
interest rate market, a Fund would have to replace the security with a lower
yielding security, resulting in a decreased return for investors. Conversely, a
high-yield, high-risk bond's value will decrease in a rising interest rate
market, as will the value of the Fund's assets.  If the Fund experiences
significant unexpected net redemptions, this may force it to sell high-yield,
high-risk bonds without regard to their investment merits, thereby decreasing
the asset base upon which expenses can be spread and possibly reducing the
Fund's rate of return.
    
     LIQUIDITY AND VALUATION.  There may be little trading in the secondary
     -----------------------                                               
market for particular bonds, which may adversely affect a Fund's ability to
value accurately or dispose of such bonds. Adverse publicity and investor
perception, whether or not based on fundamental analysis, may decrease the
values and liquidity of high-yield, high-risk bonds, especially in a thin
market.      

                                      B-29
<PAGE>
 
     LEGISLATION.  Federal laws require the divestiture by federally insured
     ------------                                                           
savings and loan associations of their investments in high yield bonds and limit
the deductibility of interest by certain corporate issuers of high yield bonds.
These laws could adversely affect a Fund's net asset value and investment
practices, the secondary market for high yield securities, the financial
condition of issuers of these securities and the value of outstanding high yield
securities.

     TAXES.   A Fund may purchase debt securities (such as zero-coupon or pay-
     ------                                                                  
in-kind securities) that contain original issue discount.  Original issue
discount that accrues in a taxable year is treated as earned by a Fund and
therefore is subject to the distribution requirements of the Code.  Because the
original issue discount earned by the Fund in a taxable year may not be
represented by cash income, the Fund may have to dispose of other securities and
use the proceeds to make distributions to shareholders.

MUNICIPAL SECURITIES AND SHORT-TERM TAXABLE SECURITIES.  Subject to the
restrictions set forth in the Prospectus, the Tax Exempt Insured Fund seeks to
achieve its investment objective by investing in Municipal Securities and Short-
Term Taxable Securities (defined below).
    
     Municipal Securities.  "Municipal Securities" include long-term (i.e.,
maturing in over ten years) and medium-term (i.e., maturing from three to ten
years) municipal bonds ("Municipal Bonds") and short-term (i.e., maturing in one
day to three years) municipal notes and tax-exempt commercial paper ("Municipal
Notes"), and in each case refers to debt obligations issued by or on behalf of
states, territories and possessions of the United States and of the District of
Columbia and their political subdivisions, agencies and instrumentalities, the
interest from which is, in the opinion of bond counsel at the time of issuance,
exempt from Federal income tax.      

     The two principal classifications of Municipal Bonds are general obligation
bonds and revenue or special obligation bonds.  General obligation bonds are
secured by the issuer's pledge of its faith, credit and taxing power for the
payment of principal and interest.  The term "issuer" means the agency,
authority, instrumentality or other political subdivision whose assets and
revenues are available for the payment of principal and interest on the bonds.
Revenue or special obligation bonds are payable only from the revenue derived
from a particular facility or class of facilities or, in some cases, from the
proceeds of a special tax or other specific revenue source and generally are not
payable from the unrestricted revenues of the issuer.  There are, of course,
variations in the quality of Municipal Bonds, both within a particular
classification and between classifications.

     Municipal Housing Bonds are Municipal Bonds issued by state and municipal
authorities established to purchase single family and other residential
mortgages from commercial banks and other lending institutions within the
applicable state or municipality.  Such Bonds are typically revenue or special
obligation bonds in that they are secured only by the authority issuing such
bonds.  Such authorities are located in or have been established by at least 45
states and generally are intended to facilitate the construction and sales of
housing for low income families.  Generally, the authorities are not entitled to
state or municipal appropriations from general tax revenues.  As a result, and
because investors in Municipal Housing Bonds receive repayments of principal as
the underlying mortgages are paid prior to maturity, the yields obtainable on
such Bonds exceed those of other similarly rated Municipal Bonds.  Municipal
Housing Bonds are used to purchase single family or other residential mortgages
which may or may not be insured by the FHA or guaranteed by the VA. Some
Municipal Housing Bonds, however, are used only to purchase residential
mortgages that are either insured by

                                      B-30
<PAGE>
 
the FHA or guaranteed by the VA. Under FHA insurance programs, upon the
conveyance of the insured premises and compliance with certain administrative
procedures, the FHA pays to the mortgage insurance benefits equal to the unpaid
principal amount of the defaulted mortgage loan. Under a VA guaranty, the VA
guarantees the payment of a mortgage loan up to a maximum. The liability of the
VA on any such guaranty is reduced or increased pro rata with any reduction or
increase in the amount of indebtedness, but in no event will the amount payable
on the guaranty exceed the amount of the original guaranty. Notwithstanding the
dollar and percentage limitations of the guaranty, a mortgagee will ordinarily
suffer a monetary loss only when the difference between the unsatisfied
indebtedness and the proceeds of a foreclosure sale of the mortgaged premises is
greater than the original guaranty as adjusted. The VA may, at its option and
without regard to the guaranty, make full payment to a mortgagee of the
unsatisfied indebtedness on a mortgage loan upon its assignment to the VA of the
property. As most Municipal Housing Bonds are secured only by the mortgages
purchased, bonds that are used to purchase mortgages that are either insured by
the FHA or guaranteed by the VA, will have less risk of loss of principal than
bonds that are used to purchase comparable mortgages that are not insured by the
FHA or guaranteed by the VA.
    
     The Fund may invest in Municipal Bonds which, on the date of investment,
are within the four highest ratings of Moody's ("Aaa," "Aa," "A," "Baa") or S&P
("AAA," "AA," "A," "BBB") or in Municipal Bonds which are not rated, provided
that in the opinion of the Adviser, such Municipal Bonds are comparable in
quality to those within the four highest ratings.  Though bonds rated Baa or BBB
normally exhibit adequate protection parameters, adverse economic conditions or
changing circumstances are more likely to lead to a weakened capacity to pay
interest and repay principal for such bonds than for bonds in higher rated
categories.  Occasional speculative factors apply to some bonds in this
category.      
    
     The ratings of Moody's and S&P represent their respective opinions of the
qualities of the securities they undertake to rate  and such ratings are general
and are not absolute standards of quality. In determining suitability of
investment in a particular unrated security, the Adviser will take into
consideration asset and debt coverage, the purpose of the financing, history of
the issuer, existence of other rated securities of the issuer and other general
conditions as may be relevant, including comparability to other issuers.      

     The Fund has no restrictions on the maturity of Municipal Securities in
which it may invest.  The Fund seeks to invest in Municipal Securities of such
maturities that, in the judgment of the Adviser will provide a high level of
current income consistent with liquidity requirements and market conditions
after taking into account the cost of any insurance obtainable on such Municipal
Securities.  While short-term trading increases the Fund's turnover, the
execution costs for Municipal Securities are substantially less than for
equivalent dollar values of equity securities.

     Generally, the value of Municipal Securities will change as the general
level of interest rates fluctuate.  During periods of rising interest rates, the
value of outstanding long-term,  fixed-income securities generally decline.
Conversely, during  periods of falling interest rates, the value of such
securities generally increase.  The value of the Fund's shares fluctuates with
the value of its investments. In addition, the individual credit ratings of
issuers' obligations, the ability of such issuers to make payments of interest
and principal on their obligations, and the value of any insurance applicable
thereto, also affects the value of the Fund's investments.

                                      B-31
<PAGE>
 
     Yields on Municipal Bonds vary depending on a variety of factors, including
the general condition of the financial markets and of the municipal bond market,
the size of a particular offering, the maturity of the obligation and the credit
rating of the issuer.  Generally, Municipal Bonds of longer maturities produce
higher current yields but are subject to greater price fluctuation due to
changes in interest rates, tax laws and other general market factors than are
Municipal Bonds with shorter maturities.  Similarly, lower-rated Municipal Bonds
generally produce a higher yield than higher-rated Municipal Bonds due to the
perception of a greater degree of risk as to the ability of the issuer to pay
principal and interest obligations.

     Short-Term Taxable Securities.  "Short-Term Taxable Securities" mature in
one year or less from the date of purchase and consist of the following
obligations, the income from which is subject to Federal income tax:
obligations of the U.S. government, its agencies or instrumentalities, some of
which may be secured by the full faith and credit of the U.S. government and
some of which may be secured only by the credit of the agency or instrumentality
of the U.S. government issuing such obligations; corporate bonds or debentures
rated within the four highest grades by either Moody's or S&P; commercial paper
rated by either of such rating services (Prime-1 through Prime 2- or A-1 through
A-2, respectively) or, if not rated, issued by companies having an outstanding
debt issue rated at least "A" by either of such rating services; certificates of
deposit and bankers' acceptances of banks having assets in excess of $2 billion.
    
     Insurance Feature.  As discussed in the Prospectus, the Fund under normal
market conditions invests at least 65% of its total assets in Municipal Bonds
that, at the time of purchase, either (1) are insured under a Mutual Fund
Insurance Policy issued to the Trust for the benefit of the Fund by Financial
Guaranty Insurance Company ("Financial Guaranty") or another insurer (subject to
the limitations set forth below); (2) are insured under an insurance policy
obtained by the issuer or underwriter of such Municipal Bonds at the time of
original issuance thereof (a "New Issue Insurance Policy"); or (3) are without
insurance coverage, provided that, an escrow or trust account has been
                    -------- ----                                     
established pursuant to the documents creating the Municipal Bonds and
containing sufficient U.S. government securities backed by the U.S. government's
full faith and credit pledge in order to ensure payment of principal and
interest on such bonds.  If a Municipal Bond is already covered by a New Issue
Insurance Policy when acquired by the Fund, then coverage will not be duplicated
by a Mutual Fund Insurance Policy; if a Municipal Bond, other than that
described in (3) above, is not covered by a New Issue Insurance Policy then it
may be covered by a Mutual Fund Insurance Policy purchased by the Trust for the
benefit of the Fund.  The Fund may also purchase Municipal Notes that are
insured. However, in general, Municipal Notes are not presently issued with New
Issue Insurance Policies and the Fund does not generally expect to cover
Municipal Notes under its Mutual Fund Insurance Policy. Accordingly, the Fund
does not presently expect that any significant portion of the Municipal Notes it
purchases will be covered by insurance.  Securities  other than Municipal Bonds
and Notes purchased by the Fund are not covered by insurance.  Although the
insurance feature reduces certain financial risks, the premiums for a Mutual
Fund Insurance Policy, which are paid from the Fund's assets, and the
restrictions on investments imposed by the guidelines in a Mutual Fund Insurance
Policy, reduce the Fund's current yield. For the fiscal year ended March 31,
1998, the premiums paid by Tax Exempt Insured Fund for a Mutual Fund Insurance
Policy were .01%  of  the average net assets of the Fund.      

     In order to be considered as eligible insurance by the Fund, such insurance
policies must guarantee the scheduled payment of all principal and interest on
the Municipal Bonds as they become due for as long as such Bonds remain held by
the Fund in the case of a Mutual Fund Insurance Policy, 

                                      B-32
<PAGE>
 
and for as long as such Bonds are outstanding in the case of a New Issue
Insurance Policy. However, such insurance may provide that in the event of non-
payment of interest or principal when due with respect to an insured Municipal
Bond, the insurer is not obligated to make such payment until a specified time
period after it has been notified by the Fund that such non-payment has
occurred. (The Financial Guaranty Fund Policy described below provides that
payments will be made on the later of the date the principal or interest becomes
due for payment or the business day following the day on which Financial
Guaranty shall have received notice of non-payment from the Fund.) For these
purposes, a payment of principal may be due only at final maturity of the
Municipal Bond and not at the time any earlier sinking fund payment is due. The
insurance does not guarantee the market value of the Municipal Bonds or the
value of the shares of the Fund and, except as described below, has no effect on
the price or redemption value of the Fund's shares.

     It is anticipated that the insured Municipal Bonds held by the Fund will be
insured by Financial Guaranty (see "Financial Guaranty" below).  However,  the
Fund may obtain insurance on its Municipal Bonds or purchase insured Municipal
Bonds covered by policies issued by other insurers; provided, any such company
has a claims-paying ability rated "AAA" by S&P or "Aaa" by Moody's.  S&P and
Moody's have rated the claims-paying ability of Financial Guaranty and the
Municipal Bonds insured by Financial Guaranty at "AAA" and "Aaa," respectively.

     NEW ISSUE INSURANCE POLICIES.  The New Issue Insurance Policies, if any,
     ----------------------------                                            
will have been obtained by the issuer of the Municipal Bonds and all premiums
with respect to such Bonds for the lives thereof will have been paid in advance
by such issuer.  Such policies are generally non-cancelable and will continue in
force so long as the Municipal Bonds are outstanding and the insurer remains in
business.  Since New Issue Insurance Policies remain in effect as long as the
Bonds are outstanding, the insurance may have an effect on the resale value of
the Municipal Bonds.  Therefore, New Issue Insurance Policies may be considered
to represent an element of market value in regard to Municipal Bonds thus
insured, but the exact effect, if any, of this insurance on such market value
cannot be estimated.

     MUTUAL FUND INSURANCE POLICY.  The Trust has obtained a Mutual Fund
     ----------------------------                                       
Insurance Policy (the "Fund Policy") on behalf of the Fund from Financial
Guaranty.  Under the Fund Policy, if the principal of or interest on a bond
covered by the Fund Policy is due for payment, but is unpaid by reason of non-
payment by the issuer, Financial Guaranty, upon proper notice by the Fund, will
make a payment of such amount to a fiscal agent for the benefit of the Fund,
upon the fiscal agent receiving from the Fund (i) evidence of the Fund's right
to receive payment of the principal or interest due for payment and (ii)
evidence that all of the Fund's right to such payment of the principal or
interest due for payment shall thereupon vest with Financial Guaranty.  The
principal of a bond is considered due for payment under the Fund Policy at the
stated maturity date of such bond or the date on which the same shall have been
duly called for mandatory sinking fund redemption.  The principal of a bond will
not be considered due for payment under the Fund Policy by reason of a call for
redemption (other than a mandatory sinking fund redemption), acceleration or
other advancement of maturity.  The interest on a bond is considered due under
the Fund Policy on the stated date for payment.  "Non-payment," by an issuer of
bonds, is when that issuer has not provided, on a timely basis, sufficient funds
to the paying agent of the issuer for payment in full of all principal and
interest due for payment.

     Financial Guaranty's obligation to insure any particular bond which it has
agreed to insure is subject only to the Fund's becoming the owner of such bond
(i) on or before the 100th day following 

                                      B-33
<PAGE>
 
the date on which the Fund purchases such bond or (ii) on or before the 150th
day following the purchase date in the case of "when, as and if issued" bonds
which the issuer thereof has failed on a timely basis to deliver in definitive
form to the purchasers thereof. So long as the Fund becomes the owner on or
before the 100th or 150th day following the purchase date, as the case may be,
such bond will be insured as of the purchase date. Once the insurance under the
Fund Policy is effective with respect to the Municipal Bonds, it covers the
Municipal Bonds only so long as the Fund is in existence, Financial Guaranty is
still in business, the covered Municipal Bonds continue to be held by the Fund,
and the Fund pays the insurance premium monthly with respect to the covered
Municipal Bonds. In the event of a sale of any Municipal Bond held by the Fund
or payment thereof prior to maturity, the Fund Policy terminates as to such
Municipal Bond and Financial Guaranty is liable only for those payments of
principal and interest which are then due and owing. However, if in the judgment
of the Adviser it would be to the Fund's advantage, the Trust, on behalf of the
Fund, may purchase additional insurance (if available at an acceptable premium)
that will extend the insurance coverage on such Municipal Bond until maturity.

     The Fund Policy provides that it is non-cancelable by Financial Guaranty
except for non-payment of premiums.  Once the Fund purchases a bond and begins
paying a premium for that bond based upon a stated annual premium, that annual
premium rate cannot be changed by Financial Guaranty so long as the bond is
owned by the Fund and insured under the Fund Policy.  Similar Municipal Bonds
purchased at different times, however, may have different premiums.  The Trust,
at the request of the Fund, may cancel the Fund Policy at any time upon written
notice to Financial Guaranty and may do so if the Fund determines that the
benefits of the Fund Policy are not justified by the expense involved.  In the
event the Fund were to cancel the Fund Policy and not obtain a substitute, the
Fund would satisfy its investment policy concerning the portion of its portfolio
required to be invested in insured Municipal Bonds by limiting such investments
to Municipal Bonds covered by New Issue Insurance Policies.  If adequate
quantities of such Municipal Bonds were not available, the Fund would promptly
seek approval of its shareholders to change its name and its fundamental
investment policy.

     If the Fund discontinues insuring newly acquired Municipal Bonds with
Financial Guaranty, it has the right to continue paying premiums to Financial
Guaranty for all Municipal Bonds previously insured and still held by the Fund
and keep the insurance in force as to those Municipal Bonds.  The insurance
premiums will be payable monthly in advance by the Fund based on a statement of
premiums duly supplied by Financial Guaranty.  The amount of premiums due will
be computed on a daily basis for purchases and sales of covered Municipal Bonds
during the month. If the Fund sells a Municipal Bond or that Bond is redeemed,
Financial Guaranty will refund any unused portion of the premium.

     Municipal Bonds are eligible for insurance under the Fund Policy if they
are, at the time of purchase by the Fund, identified separately or by category
in qualitative guidelines (based primarily on ratings) furnished by Financial
Guaranty, and are in compliance with the aggregate limitations on amounts set
forth in such guidelines.  Premium variations are based, in part, on the rating
of the Municipal Bond being insured at the time the Fund purchases such Bond.
Financial Guaranty may be willing to insure only a portion of the outstanding
bonds, or issue of bonds, by any particular issuer. In such event, Financial
Guaranty will advise the Fund, on a quarterly basis,  of any limitation on the
insurance available for such Municipal Bonds.  Once Financial Guaranty has
established such a limitation, it cannot reduce that limitation for any issue
during that quarter, but Financial Guaranty may, 

                                      B-34
<PAGE>
 
at its sole discretion, remove at any time, any Municipal Bond from its list of
bonds eligible to be insured if the credit quality of such Municipal Bond has
materially deteriorated after the quarterly limitation is made. Once such
Municipal Bond is removed from the list of bonds eligible to be insured the Fund
cannot acquire insurance upon such Municipal Bond from Financial Guaranty.
Financial Guaranty, however, must continue to insure the full amount of such
bonds previously acquired so long as they remain held by the Fund and were, at
the time of purchase by the Fund, considered eligible by Financial Guaranty. The
qualitative guidelines and aggregate amount limitations established by Financial
Guaranty, from time to time, will not necessarily be the same as those the
Adviser would use to govern selection of Municipal Bonds for the Fund's
investments. Therefore, from time to time, such guidelines and limitations may
affect investment decisions. When the Fund's investment policies are more
restrictive than the qualitative guidelines and aggregate amount limitations
established by Financial Guaranty or any other insurer, the Fund's policies will
govern.
    
     Because coverage under the Fund Policy terminates upon sale of a Municipal
Bond held by the Fund, the insurance does not have any effect on the resale
value of Municipal Bonds.  Therefore, the Adviser may decide to retain any
insured Municipal Bonds which are in default or, in the view of the Adviser, in
significant risk of default and to recommend to the Trustees that the Fund place
a value on the insurance which will be equal to the difference between the
market value of the defaulted Municipal Bond and the market value of similar
Municipal Bonds of minimum investment grade (i.e., rated "BBB") which are not in
default.  As a result, the Adviser may be unable to fully manage the Fund's
investments to the extent that it holds defaulted Municipal Bonds, which will
limit the ability of the Adviser in certain circumstances to purchase other
Municipal Bonds.  While a defaulted Municipal Bond is held by the Fund, the Fund
continues to pay the insurance premium thereon, but also collects interest
payments from the insurer and retains the rights to collect the full amount  of
principal from the insurer when the Municipal Bond comes due.  The Fund expects
that the market value of a defaulted Municipal Bond covered by a New Issue
Insurance Policy will generally be greater than the market value of an otherwise
comparable defaulted Municipal Bond covered by the Fund Policy.      

     SECONDARY MARKET INSURANCE POLICIES.   On behalf of the Fund, the Trust
     -----------------------------------                                    
may, at any time, purchase from Financial Guaranty a secondary market insurance
policy (a "Secondary Market Policy") on any Municipal Bond currently covered by
the Fund Policy at the time such Bond was purchased by the Fund.  The coverage
and obligation to pay monthly premiums under the Fund Policy would cease with
the purchase by the Trust of a Secondary Market Policy.

     By purchasing a Secondary Market Policy, the Trust would, upon payment of a
single premium, obtain similar insurance for the Fund against non-payment of
scheduled principal and interest for the remaining term Municipal Bond,
regardless of whether the Fund then owned the Bond.  Such insurance coverage
will be non-cancelable and will continue in force so long as the Municipal Bonds
so insured are outstanding.  The purpose of acquiring such a policy would be to
enable the Fund to sell the Municipal Bond to a third party as an "AAA"/"Aaa"
rated insured Municipal Bond at a market price higher than what otherwise might
be obtainable if the security were sold without the insurance coverage.  (Such
rating is not automatic, however, and must specifically be requested for each
Municipal Bond.)  Any difference between the excess of a Municipal Bond's market
value as an "AAA"/"Aaa" rated Municipal Bond over its market value without such
rating and the single premium payment would inure to the Fund in determining the
net capital gain or loss realized by the Fund upon the sale of the Bond.

                                      B-35
<PAGE>
 
     Since Secondary Market Policies remain in effect as long as the Municipal
Bonds insured thereby are outstanding, such insurance may have an effect on the
resale value of such Bonds. Therefore, Secondary Market Policies may be
considered to represent an element of market value with regard to Municipal
Bonds thus insured, but the exact effect, if any, of this insurance on such
market value cannot be estimated.  Since the Fund has the right under the Mutual
Fund Insurance Policy to purchase such Secondary Market Policy even if an
eligible Municipal Bond is currently in default as to any payments by the
issuer, the Fund would have the opportunity to sell such Bond, [rather than as
described above,] be obligated to hold it in its portfolio in order to continue
the Fund Policy in force.

     FINANCIAL GUARANTY.  Financial Guaranty, in addition to providing insurance
     ------------------                                                         
for the payment of interest and principal of municipal bonds and notes held in
mutual fund portfolios, provides insurance for all, or a portion of, new and
secondary market issues of municipal bonds and notes and for municipal bonds and
notes held in unit investment trust portfolios.  It is also authorized, in some
states, to write fire, property damage liability, worker's compensation and
employers' liability and fidelity and surety insurance.

     Financial Guaranty is currently licensed to provide insurance in 50 states
and the District of Columbia, files reports with state insurance regulatory
agencies and is subject to audit and review by such authorities.  Such
regulation, however, is no guarantee that Financial Guaranty will be able to
perform its contracts of insurance in the event a claim should be made
thereunder at some time in the future.

                            INVESTMENT RESTRICTIONS

     Each Fund is subject to a number of investment restrictions that are
fundamental policies and may not be changed without the approval of the holders
of a majority of that Fund's outstanding voting securities.  A "majority of the
outstanding voting securities" of a Fund for this purpose means the lesser of
(i) 67% of the shares of the Fund represented at a meeting at which more than
50% of the outstanding shares are present in person or represented by proxy or
(ii) more than 50% of the outstanding shares.  Unless otherwise indicated, all
percentage limitations apply to each Fund on an individual basis, and apply only
at the time the investment is made; any subsequent change in any applicable
percentage resulting from fluctuations in value will not be deemed an investment
contrary to these restrictions.  Under these restrictions:

          (1)  Each Fund may not purchase securities on margin, but each Fund
               may obtain such short-term credits as may be necessary for the
               clearance of transactions;

          (2)  Each Fund may not make short sales of securities to maintain a
               short position, except that each Fund may effect short sales
               against the box;

          (3)  Each Fund may not issue senior securities or borrow money or
               pledge its assets except that: (i) each Fund may borrow from a
               bank for temporary or emergency purposes in amounts not exceeding
               5% (taken at the lower of cost or current value) of its total
               assets (not including the amount borrowed) and pledge its assets
               to secure such borrowings; (ii) the Federal Securities Fund,
               Diversified Income Fund and High Income Fund may each borrow
               money to purchase securities in amounts not exceeding 50% of its
               net assets and pledge

                                      B-36
<PAGE>
 
               its assets to secure such borrowings; and (iii) the High Income
               Fund and Diversified Income Fund may pledge up to 5% of its
               assets in connection with interest-rate swaps;

          (4)  Each Fund may not purchase any security (other than obligations
               of the U.S. government, its agencies, or instrumentalities) if as
               a result: (i) as to 75% of the Fund's total assets (taken at
               current value), more than 5% of such assets would then be
               invested in securities of a single issuer, or (ii) more than 25%
               of the Fund's total assets (taken at current value) would be
               invested in a single industry, or (iii) the Fund would then hold
               more than 10% of the outstanding voting securities of an issuer;

          (5)  Each Fund may not buy or sell commodities or commodity contracts
               (except financial futures as described under "Investment
               Objectives and Policies" above) or real estate or interests in
               real estate, although it may purchase and sell securities which
               are secured by real estate and securities of companies which
               invest or deal in real estate;

          (6)  Each Fund may not act as underwriter except to the extent that,
               in connection with the disposition of Fund securities, it may be
               deemed to be an underwriter under certain Federal securities
               laws;

          (7)  Each Fund may not make loans, except through (i) repurchase
               agreements (repurchase agreements with a maturity of longer than
               7 days together with other illiquid assets being limited to 10%
               of the Fund's total assets), (ii) loans of portfolio securities
               (limited to 33% of a Fund's assets), and (iii) participation in
               loans to foreign governments or companies;

     The following additional restrictions are not fundamental policies and may
be changed by the Trustees without a shareholder vote:

          (8)  Each Fund may not purchase any security if as a result the Fund
               would then have more than 5% of its total assets (taken at
               current value) invested in securities of companies (including
               predecessors) less than three years old;

          (9)  Each Fund may not invest in any securities of any issuer if, to
               the knowledge of the Fund, any officer, Trustee or director of
               the Trust or of the Adviser owns more than 1/2 of 1% of the
               outstanding securities of such issue, and such officers,
               directors or Trustees who own more than 1/2 of 1% own in the
               aggregate more than 5% of the outstanding securities of such
               issuer;

          (10) Each Fund may not make investments for the purpose of exercising
               control or management;

          (11) The Fund may not invest more than 10% of its net assets in
               illiquid securities, including repurchase agreements which have a
               maturity of longer than seven days, time deposits with a maturity
               of longer than seven days, securities with

                                      B-37
<PAGE>
 
               legal or contractual restrictions on resale and securities that
               are not readily marketable in securities markets either within or
               without the United States. Restricted securities eligible for
               resale pursuant to Rule 144A under the Securities Act that have a
               readily available market, and commercial paper exempted from
               registration under the Securities Act pursuant to Section 4(2) of
               the Securities Act that may be offered and sold to "qualified
               institutional buyers" as defined in Rule 144A, which the Adviser
               has determined to be liquid pursuant to guidelines established by
               the Trustees, will not be considered illiquid for purposes of
               this 10% limitation on illiquid securities;

          (12) Each Fund may not invest in securities of other registered
               investment companies, except by purchases in the open market
               involving only customary brokerage commissions and as a result of
               which the Fund will not hold more than 3% of the outstanding
               voting securities of any one investment company, will not have
               invested more than 5% of its total assets in any one investment
               company and will not have invested more than 10% of its total
               assets in such securities of one or more investment companies
               (each of the above percentages to be determined at the time of
               investment), or except as part of a merger, consolidation or
               other acquisition;

          (13) Each Fund may not invest in interests in oil, gas or other
               mineral exploration or development programs, although it may
               invest in the securities of companies which invest in or sponsor
               such programs; and

          (14) The High Income Fund may not purchase any security if as a result
               the Fund would then hold more than 10% of any class of securities
               of an issuer (taking all common stock issues of an issuer as a
               single class, all preferred stock issues as a single class, and
               all debt issues as a single class).

                                      B-38
<PAGE>
 
                             TRUSTEES AND OFFICERS

     The following table lists the Trustees and executive officers of the Trust,
their age, business addresses and principal occupations during the past five
years.  The SunAmerica Mutual Funds consist of SunAmerica Equity Funds,
SunAmerica Income Funds, SunAmerica Money Market Funds, Inc. and Style Select
Series, Inc.  An asterisk indicates those Trustees who are "interested persons"
as that term is defined in the 1940 Act.


<TABLE>    
<CAPTION>
                                  Position                Principal Occupations
Name, Age and Address             with the Fund           During Past 5 Years
- ---------------------             -------------           -------------------
 
<S>                               <C>                     <C>
S. James Coppersmith, 65          Trustee                 Director/Trustee of the Boston Stock
Emerson College                                           Exchange, Uno Restaurant Corp., Waban
100 Beacon Street                                         Corp., Kushner-Locke Co. and Chayron Inc.;
Boston, MA 02116                                          Chairman of the Board of Emerson College;
                                                          formerly, President and General Manager,
                                                          WCVB-TV, a division of the Hearst
                                                          Corporation, from 1982 to 1994 (retired);
                                                          Director/Trustee, SunAmerica Mutual Funds
                                                          and Anchor Series Trust ("AST").
 
Samuel M. Eisenstat, 58           Chairman of the Board   Attorney in private practice; President and
430 East 86th Street                                      Chief Executive Officer, Abjac Energy
New York, NY 10028                                        Corporation; Director/Trustee of Atlantic
                                                          Realty Trust, UMB Bank and Trust (a
                                                          subsidiary of United Mizrachi Bank), North
                                                          European Royalty Trust, Volt Information
                                                          Sciences Funding, Inc. (a subsidiary of Volt
                                                          Information Sciences, Inc.) and Venture
                                                          Partners International (an Israeli venture
                                                          capital fund); Chairman of the Boards of the
                                                          Directors/Trustees, SunAmerica Mutual
                                                          Funds and AST.
 
Stephen J. Gutman, 55             Trustee                 Partner and Chief Operating Officer of B.B.
515 East 79th Street                                      Associates LLC (menswear specialty retailing
New York, NY 10021                                        and other activities), since May 1989;
                                                          Director/Trustee, SunAmerica Mutual Funds
                                                          and AST.
</TABLE>      

                                      B-39
<PAGE>
 
<TABLE>     
<CAPTION> 
 
                              Position                    Principal Occupations                         
Name, Age and Address         with the Fund               During Past 5 Years                           
- ---------------------         ---------------------       ---------------------------------------------- 
<S>                           <C>                     <C> 
Peter A. Harbeck*, 44         Trustee and President        Director and President, SunAmerica Asset
The SunAmerica Center                                      Management Corp. ("SunAmerica"); Director,
733 Third Avenue                                           SunAmerica Capital Services, Inc. ("SACS"),
New York, NY 10017-3204                                    since February 1993;  Director and President,
                                                           SunAmerica Fund Services, Inc. ("SAFS"),
                                                           since May 1988; President,  SunAmerica
                                                           Mutual Funds and AST; Executive Vice
                                                           President and Chief Operating Officer,
                                                           SunAmerica, from May 1988 to August 1995;
                                                           Executive Vice President, SACS, from
                                                           November 1991 to August 1995; Director,
                                                           Resources Trust Company.
 
Peter McMillan III*, 40       Trustee                      Executive Vice President and Chief
1 SunAmerica Center                                        Investment Officer, SunAmerica Investments,
Los Angeles, CA 90067                                      Inc., since August 1989; Director/Trustee,
                                                           SunAmerica Mutual Funds; Director,
                                                           Resources Trust Company.
 
Sebastiano Sterpa, 68         Trustee                      Founder of Sterpa Realty, Inc., a full service 
Suite 200                                                  real estate firm, since 1962; Chairman of the 
200 West Glenoaks Blvd.                                    Sterpa Group, real estate investments and     
Glendale, CA  91202                                        management company since 1962;                
                                                           Director/Trustee, SunAmerica Mutual Funds.     
 
P. Christopher Leary, 38      Vice President               Executive Vice President, SunAmerica, since
The SunAmerica Center                                      October 1997; Senior Vice President,
733 Third Avenue                                           SunAmerica, since January 1994; Director of
New York, NY 10017-3204                                    Fixed-Income, SunAmerica, since October
                                                           1996.
</TABLE>      
 

                                      B-40
<PAGE>
 
<TABLE>    
<CAPTION>
                              Position              Principal Occupations
Name, Age and Address         with the Fund         During Past 5 Years
- ---------------------         -------------         -------------------
<S>                          <C>                    <C>  
John DiVito, 27               Vice President        Assistant Vice President, SunAmerica, since
The SunAmerica Center                               April 1997; Fixed Income Analyst,
733 Third Avenue                                    SunAmerica, since July 1993.
New York, New York 10017

James T. McGrath, 30          Vice President        Portfolio Manager, SunAmerica, since August
The SunAmerica Center                               1997; Investment Assistant, Assistant Vice
733 Third Avenue                                    President and Municipal Bond Trader, Chase
New York, New York 10017                            Asset Management, from 1991 to 1997.
 
Karolann Patranzino, 28       Vice President        Assistant Vice President, SunAmerica, since
The SunAmerica Center                               April 1997; Fixed Income Analyst,
733 Third Avenue                                    SunAmerica, since July 1993.
New York, New York 10017
 
John W. Risner, 38            Vice President        Senior Portfolio Manager, SunAmerica, since
The SunAmerica Center                               February 1997; Vice President and Senior
733 Third Avenue                                    Portfolio Manager, Value Line Asset
New York, New York 10017                            Management, from April 1992 to January
                                                    1997.
 
Robert M. Zakem, 40           Secretary             Senior Vice President and General Counsel,
The SunAmerica Center                               SunAmerica, since April 1993; Executive Vice
733 Third Avenue                                    President, General Counsel and Director,
New York, NY 10017-3204                             SACS, since February 1993; Vice President,
                                                    General Counsel and Assistant Secretary,
                                                    SAFS, since January 1994; Vice President,
                                                    SunAmerica Series Trust, Anchor Pathway
                                                    Fund and Seasons Series Trust; Assistant
                                                    Secretary, SunAmerica Series Trust and
                                                    Anchor Pathway Fund, since September 1993;
                                                    Assistant Secretary, Seasons Series Trust,
                                                    since April 1997; Secretary, SunAmerica
                                                    Mutual Funds and AST.
</TABLE>      

                                      B-41
<PAGE>
 
<TABLE>     
<CAPTION> 
 
                              Position         Principal Occupations
Name, Age and Address         with the Fund    During Past 5 Years
- ----------------------        -------------    -------------------                            
<S>                            <C>             <C> 
Peter C. Sutton, 33           Treasurer        Senior Vice President, SunAmerica, since
The SunAmerica Center                          April 1997; Treasurer, SunAmerica Mutual
733 Third Avenue                               Funds and AST, since February 1996; Vice
New York, NY 10017-3204                        President and Assistant Treasurer,
                                               SunAmerica Series Trust and Anchor Pathway
                                               Fund, since October 1994;  Vice President and
                                               Assistant Treasurer, Seasons Series Trust,
                                               since April 1997; joined SunAmerica in 1990.
 
</TABLE>      

     Trustees and officers of the Trust are also trustees and officers of some
or all of the other investment companies managed, administered or advised by the
Adviser, and distributed by the Distributor and other affiliates of SunAmerica
Inc.

     The Trust pays each Trustee, who is not an interested person of the Trust
or the Adviser (each a "disinterested" Trustee), annual compensation in addition
to reimbursement of out-of-pocket expenses in connection with attendance at
meetings of the Trustees.  Specifically, each disinterested Trustee receives a
pro rata portion (based upon the Trust's net assets) of $40,000 in annual
compensation for acting as director or trustee to all the retail funds in the
SunAmerica Mutual Funds. In addition, Mr. Eisenstat receives an aggregate of
$2,000 in annual compensation for serving as the Chairman of the Boards of the
SunAmerica Mutual Funds.  Officers of the Trust receive no direct remuneration
in such capacity from the Trust or any of the Funds.

     In addition, each disinterested Trustee also serves on the Audit Committee
of the Board of Trustees.  Each member of the Audit Committee receives an
aggregate of $5,000 in annual compensation for serving on the Audit Committees
of all the SunAmerica Mutual Funds and Anchor Series Trust.  With respect to the
Trust, each member of the committee receives a pro rata portion of the $5,000
annual compensation, based on the relative net assets of the Trust.  The Trust
also has a Nominating Committee, comprised solely of disinterested Trustees,
which recommends to the Trustees those persons to be nominated for election as
Trustees by shareholders and selects and proposes nominees for election by
Trustees between shareholders' meetings.  Members of the Nominating Committee
serve without compensation.

     The Trustees (and Directors) of the SunAmerica Mutual Funds have adopted
the SunAmerica Disinterested Trustees' and Directors' Retirement Plan (the
"Retirement Plan") effective January 1, 1993 for the Trustees who are
disinterested Trustees.  The Retirement Plan provides generally that if a
disinterested Trustee who has at least 10 years of consecutive service as a
disinterested Trustee of any of the SunAmerica Mutual Funds (an "Eligible
Trustee") retires after reaching age 60 but before age 70 or dies while a
Trustee, such person will be eligible to receive a retirement or death benefit
from each SunAmerica Mutual Fund with respect to which he or she is an Eligible
Trustee.  As of each birthday, prior to the 70th birthday, but in no event for a
period greater than 10 years, each Eligible Trustee will be credited with an
amount equal to (i) 50% of his or her regular fees (excluding committee fees)
for services as a disinterested Trustee of each SunAmerica Mutual Fund for the
calendar year in which such birthday occurs, plus (ii) 8.5% of any amounts
credited under clause (i)

                                      B-42
<PAGE>
 
during prior years.  An Eligible Trustee may receive any benefits payable under
the Retirement Plan, at his or her election, either in one lump sum or in up to
fifteen annual installments.
    
     The following table sets forth information summarizing the compensation of
each disinterested Trustee for his services as Trustee for the fiscal year ended
March 31, 1998.  Neither the Trustees who are interested persons of the Trust
nor any officers of the Trust receive any compensation.

                               COMPENSATION TABLE

<TABLE>
<CAPTION>
 ---------------------------------------------------------------------------------------------------------------
                                Aggregate          Pension or            Estimated Annual    Total Compensation
                                Compensation       Retirement Benefits   Benefits Upon       from Registrant and
                                from Registrant    Accrued as Part       Retirement**        Fund Complex Paid
                                                   of Fund Expenses*                         to Trustees*
Trustee
<S>                             <C>               <C>                   <C>                <C>
- --------------------------------------------------------------------------------------------------------------- 
S. James                        $13,590            $39,122               $29,670             $   65,000
Coppersmith
- --------------------------------------------------------------------------------------------------------------- 
Samuel M. Eisenstat             $ 8,691            $34,450               $46,089             $   69,000
- --------------------------------------------------------------------------------------------------------------- 
Stephen J. Gutman               $ 8,327            $35,671               $60,912             $   65,000
- ---------------------------------------------------------------------------------------------------------------
Sebastiano Sterpa               $ 8,379            $24,038               $ 7,900             $   43,333***
- ---------------------------------------------------------------------------------------------------------------
</TABLE>

*    Information is as of March 31, 1998 for the five investment companies in
     the complex which pay fees to these directors/trustees. The complex
     consists of the SunAmerica Mutual Funds and Anchor Series Trust.
**   Assuming participant elects to receive benefits in 15 yearly installments.
***  Mr. Sterpa is not a trustee of Anchor Series Trust.

     As of June 30, 1998, the Trustees and officers of the Trust owned in the
aggregate, less than 1% of the Trust's total outstanding shares.

     The following shareholders owned of record or beneficially 5% or more of
the indicated Portfolio Class' shares outstanding as of June 30, 1998:
Diversified Income Fund - Class A - Anderson Lithograph Company, Englewood,
Colorado 80155 - owned 5%; High Income Fund - Class C - Merrill Lynch, Pierce,
Fenner & Smith Inc., Jacksonville, Florida 32246 - owned 25%.  A shareholder who
owns beneficially, directly or indirectly, 25% or more of a Portfolio's
outstanding voting securities may be deemed to "control" (as defined in the 1940
Act) that Portfolio.     

                                      B-43
<PAGE>
 
             ADVISER, PERSONAL SECURITIES TRADING, DISTRIBUTOR AND
                                 ADMINISTRATOR

THE ADVISER.  The Adviser, organized as a Delaware corporation in 1982, is
located at The SunAmerica Center, 733 Third Avenue, New York, NY 10017-3204, and
acts as adviser to each of the Funds pursuant to the Investment Advisory and
Management Agreement dated September 23, 1993 (the "Advisory Agreement") with
the Trust, on behalf of each Fund.  The Adviser is an indirect wholly owned
subsidiary of SunAmerica Inc.  SunAmerica Inc., is incorporated in the State of
Maryland and maintains its principal executive offices at 1 SunAmerica Center,
Century City, Los Angeles, CA 90067-6022, telephone (310) 772-6000.

       Under the Advisory Agreement, the Adviser selects and manages the
investments of each Fund, provides various administrative services and
supervises the Funds' daily business affairs, subject to general review by the
Trustees.

       Except to the extent otherwise specified in the Advisory Agreement, each
Fund pays, or causes to be paid, all other expenses of the Trust and each of the
Funds, including, without limitation, charges and expenses of any registrar,
custodian, transfer and dividend disbursing agent; brokerage commissions; taxes;
engraving and printing of share certificates; registration costs of the Funds
and their shares under Federal and state securities laws; the cost and expense
of printing, including typesetting, and distributing Prospectuses and Statements
of Additional Information regarding the Funds, and supplements thereto, to the
shareholders of the Funds; all expenses of shareholders' and Trustees' meetings
and of preparing, printing and mailing proxy statements and reports to
shareholders; all expenses incident to any dividend, withdrawal or redemption
options; fees and expenses of legal counsel and independent accountants;
membership dues of industry associations; interest on borrowings of the Funds;
postage; insurance premiums on property or personnel (including Officers and
Trustees) of the Trust which inure to its benefit; extraordinary expenses
(including, but not limited to, legal claims and liabilities and litigation
costs and any indemnification relating thereto); and all other costs of the
Trust's operation.

       As compensation for its services to the Funds, the Adviser receives a fee
from each Fund, payable monthly, computed daily at the following annual rates:

<TABLE> 
<CAPTION> 
Fund                                       Fee
- ----                                       ---
<S>                                 <C> 
Government Securities Fund         .75% of average daily net assets up to $200 million;
                                   .72% of next 200 million;
                                   and .55% of average daily net assets in excess of $400 million.

Federal Securities Fund            .55% of average daily net assets up to $25 million;
                                   .50% of the next $25 million;
                                   and .45% of average daily net assets in excess of $50 million.

Diversified Income Fund            .65% of average daily net assets up to $350 million;
                                   and .60% of average daily net assets in excess of $350 million.
</TABLE> 

                                      B-44
<PAGE>
 
<TABLE> 
<S>                             <C> 
High Income Fund              .75% of average daily net assets up to $200 million;
                              .72% of the next $200 million;
                              and .55% of average daily net assets in excess of $400 million.

Tax Exempt Insured Fund       .50% of average daily net assets up to $350 million;
                              and .45% of average daily net assets in excess of $350 million.
</TABLE> 
    
     The following table sets forth the total advisory fees received by the
Adviser from each Fund pursuant to the Advisory Agreement for the fiscal years
ended March 31, 1998, 1997 and 1996.     

                                     
                                 ADVISORY FEES      

<TABLE>    
<CAPTION>
- --------------------------------------------------------------------  
Fund                            1998         1997         1996
<S>                             <C>          <C>          <C>
- -------------------------------------------------------------------- 
Government Securities Fund      $2,618,884   $3,370,947   $4,212,162
- --------------------------------------------------------------------  
Amount Waived                           --           --           --
- --------------------------------------------------------------------  
Federal Securities Fund            259,246      294,357      360,738
- --------------------------------------------------------------------  
Diversified Income Fund            630,297      740,539      915,671
- --------------------------------------------------------------------  
High Income Fund                 1,128,548    1,107,351    1,273,169
- -------------------------------------------------------------------- 
Tax Exempt Insured Fund            582,729      685,760      802,564
- --------------------------------------------------------------------
</TABLE>     
    
     With respect to the Class C shares of High Income Fund, for the fiscal year
ended March 31, 1998, voluntary expense reimbursements were given to the Fund by
the Adviser in the amount of $3,859.      

     The Advisory Agreement continues with respect to each Fund from year to
year, if such continuance is approved at least annually by vote of a majority of
the Trustees or by the holders of a majority of the respective Fund's
outstanding voting securities.  Any such continuation also requires approval by
a majority of the Trustees who are not parties to the Advisory Agreement or
"interested persons" of any such party as defined in the 1940 Act by vote cast
in person at a meeting called for such purpose.  The Advisory Agreement may be
terminated with respect to a Fund at any time, without penalty, on 60 days'
written notice by the Trustees, by the holders of a majority of the respective
Fund's outstanding voting securities or by the Adviser.  The Advisory Agreement
automatically terminates with respect to each Fund in the event of its
assignment (as defined in the 1940 Act and the rules thereunder).

     Under the terms of the Advisory Agreement, the Adviser is not liable to the
Funds, or their shareholders, for any act or omission by it or for any losses
sustained by the Funds or their shareholders, except in the case of willful
misfeasance, bad faith, gross negligence or reckless disregard of duty.

PERSONAL SECURITIES TRADING.  The Trust and the Adviser have adopted a written
Code of Ethics (the "Code of Ethics") which prescribes general rules of conduct
and sets forth guidelines with respect to personal securities trading by "Access
Persons" thereof.  An Access Person as defined in the Code of Ethics is an
individual who is a trustee, director, officer, general partner or advisory
person of the Trust or the Adviser.  The guidelines on personal securities
trading include: (i) securities being considered for purchase or sale, or
purchased or sold, by any Investment Company advised by the Adviser; (ii)

                                      B-45
<PAGE>
 
Initial Public Offerings; (iii) private placements; (iv) blackout periods; (v)
short-term trading profits; (vi) gifts; and (vii) services as a director.  These
guidelines are substantially similar to those contained in the Report of the
Advisory Group on Personal Investing issued by the Investment Company
Institute's Advisory Panel.  The Adviser reports to the Board of Trustees on a
quarterly basis, as to whether there were any violations of the Code of Ethics
by Access Persons of the Trust or the Adviser during the quarter.

THE DISTRIBUTOR.  The Trust, on behalf of each Fund, has entered into a
distribution agreement (the "Distribution Agreement") with the Distributor, a
registered broker-dealer and an indirect wholly owned subsidiary of SunAmerica
Inc., to act as the principal underwriter of the shares of each Fund. The
address of the Distributor is The SunAmerica Center, 733 Third Avenue, New York,
NY 10017-3204. The Distribution Agreement provides that the Distributor has the
exclusive right to distribute shares of the Funds through its registered
representatives and authorized broker-dealers.  The Distribution Agreement also
provides that the Distributor will pay the promotional expenses, including the
incremental cost of printing prospectuses, annual reports and other periodic
reports respecting each Fund, for distribution to persons who are not
shareholders of such Fund and the costs of preparing and distributing any other
supplemental sales literature.  However, certain promotional expenses may be
borne by the Funds (see "Distribution Plans" below).

     The Distribution Agreement continues in effect from year to year, with
respect to each Fund, if such continuance is approved at least annually by vote
of a majority of the Trustees, including a majority of the disinterested
Trustees.  The Trust or the Distributor each has the right to terminate the
Distribution Agreement with respect to a Fund on 60 days' written notice,
without penalty.  The Distribution Agreement automatically terminates with
respect to each Fund in the event of its assignment (as defined in the 1940 Act
and the rules thereunder).

     The Distributor may, from time to time, pay additional commissions or
promotional incentives to brokers, dealers or other financial services firms
that sell shares of the Funds.  In some instances, such additional commissions,
fees or other incentives may be offered only to certain firms, including Royal
Alliance Associates, Inc., SunAmerica Securities, Inc., Keogler Morgan &
Company, Financial Service Corporation and Advantage Capital Corporation,
affiliates of the Distributor, that sell or are expected to sell during
specified time periods certain minimum amounts of shares of the Funds, or of
other funds underwritten by the Distributor.  In addition, the terms and
conditions of any given promotional incentive may differ from firm to firm.
Such differences will, nevertheless, be fair and equitable, and based on such
factors as size, geographic location, or other reasonable determinants, and will
in no way affect the amount paid to any investor.

DISTRIBUTION PLANS.  As indicated in the Prospectus, the Trustees of the Trust
and the shareholders of each class of shares of each Fund have adopted
Distribution Plans (the "Class A Plan," the "Class B Plan," and the "Class C
Plan" and collectively, the "Distribution Plans").  Reference is made to
"Management of the Trust - Distribution Plans" in the Prospectus for certain
information with respect to the Distribution Plans.

     Under the Class A Plan, the Distributor may receive payments from a Fund at
an annual rate of up to 0.10% of average daily net assets of such Fund's Class A
shares to compensate the Distributor and certain securities firms for providing
sales and promotional activities for distributing that class of shares.  Under
the Class B and Class C Plans, the Distributor may receive payments from a Fund
at the 

                                      B-46
<PAGE>
 
annual rate of up to 0.75% of the average daily net assets of such Fund's Class
B and Class C shares to compensate the Distributor and certain securities firms
for providing sales and promotional activities for distributing that class of
shares. The distribution costs for which the Distributor may be reimbursed out
of such distribution fees include fees paid to broker-dealers that have sold
Fund shares, commissions and other expenses such as sales literature, prospectus
printing and distribution and compensation to wholesalers. It is possible that
in any given year the amount paid to the Distributor under any of the
Distribution Plans will exceed the Distributor's distribution costs as described
above. The Distribution Plans provide that each class of shares of each Fund may
also pay the Distributor an account maintenance and service fee of up to 0.25%
of the aggregate average daily net assets of such class of shares for payments
to broker-dealers for providing continuing account maintenance. In this regard,
some payments are used to compensate broker-dealers with account maintenance and
service fees in an amount up to 0.25% per year of the assets maintained in a
Fund by their customers.
    
     The following table sets forth the distribution and service maintenance
fees the Distributor received from the Funds for the fiscal years ended March
31, 1998, 1997 and 1996.     
                       
                   DISTRIBUTION AND SERVICE MAINTENANCE FEES      

<TABLE>    
<CAPTION>
- --------------------------------------------------------------------------------------------------
                   1998                              1997                    1996
- --------------------------------------------------------------------------------------------------
                   Class A     Class B     Class C   Class A     Class B     Class A     Class B
- --------------------------------------------------------------------------------------------------
<S>                <C>        <C>          <C>       <C>        <C>          <C>        <C>       
Government                                                                              
Securities        $374,850   $2,483,056     N/A     $392,498   $3,662,116   $388,894    $5,201,895
Fund
- --------------------------------------------------------------------------------------------------
Federal                                                                                    
Securities         108,151      184,550     N/A      120,785      225,691    116,954       384,150
Fund
- --------------------------------------------------------------------------------------------------
Diversified                                                                              
Income Fund         82,072      735,197     N/A       63,781      957,064     56,515     1,247,253
- --------------------------------------------------------------------------------------------------
High Income                                                                              
Fund               161,715    1,041,969     719      138,128    1,081,816    144,739     1,284,954
- --------------------------------------------------------------------------------------------------
Tax Exempt                                                                                 
Insured Fund       324,213      239,135     N/A      379,499      287,238    462,514       283,659
- --------------------------------------------------------------------------------------------------
</TABLE>     

     Continuance of the Distribution Plans with respect to each Fund is subject
to annual approval by vote of the Trustees, including a majority of the
disinterested Trustees.  A Distribution Plan may not be amended to increase
materially the amount authorized to be spent thereunder with respect to a class
of shares of a Fund, without approval of the shareholders of the affected class
of shares of the Fund. In addition, all material amendments to the Distribution
Plans must be approved by the Trustees in the manner described above.  A
Distribution Plan may be terminated at any time with respect to a Fund without
payment of any penalty by vote of a majority of the disinterested Trustees or by
vote of a majority of the outstanding voting securities (as defined in the 1940
Act) of the affected class of shares of the Fund.  So long as the Distribution
Plans are in effect, the election and nomination of the disinterested Trustees
of the Trust shall be committed to the discretion of the disinterested Trustees.
In the Trustees' quarterly review of the Distribution Plans, they will consider
the continued 

                                      B-47
<PAGE>
 
appropriateness of, and the level of, compensation provided in the Distribution
Plans. In their consideration of the Distribution Plans with respect to a Fund,
the Trustees must consider all factors they deem relevant, including information
as to the benefits of the Fund and the shareholders of the relevant class of the
Fund.

THE ADMINISTRATOR.  The Trust has entered into a Service Agreement, under the
terms of which SAFS, an indirect wholly owned subsidiary of SunAmerica Inc.,
acts as a servicing agent assisting State Street Bank and Trust Company ("State
Street") in connection with certain services offered to the shareholders of each
of the Funds.  Under the terms of the Service Agreement, SAFS may receive
reimbursement of its costs in providing such shareholder services.  SAFS is
located at The SunAmerica Center, 733 Third Avenue, New York, NY 10017-3204.

     The Service Agreement continues in effect from year to year provided that
such continuance is approved annually by vote of a majority of the Trustees
including a majority of the disinterested Trustees.

     Pursuant to the Service Agreement, as compensation for services rendered,
SAFS receives a fee from  the Trust, computed and payable monthly based upon an
annual rate of 0.22% of average daily net assets.  This fee represents the full
cost of providing shareholder and transfer agency services to the Trust.  From
this fee, SAFS pays a fee to State Street, and its affiliate, National Financial
Data Services ("NFDS" and with State Street, the "Transfer Agent") (other than
out-of-pocket charges of the Transfer Agent which are paid by the Trust).  For
further information regarding the Transfer Agent, see the section entitled
"Additional Information" below.

                      PORTFOLIO TRANSACTIONS AND BROKERAGE

     As discussed in the Prospectus, the Adviser is responsible for decisions to
buy and sell securities for each Fund, selection of broker-dealers and
negotiation of commission rates.  Purchases and sales of securities on a
securities exchange are effected through brokers-dealers who charge a negotiated
commission for their services. Orders may be directed to any broker-dealer
including, to the extent and in the manner permitted by applicable law, an
affiliated brokerage subsidiary of the Adviser.

     In the over-the-counter market, securities are generally traded on a "net"
basis with dealers acting as principal for their own accounts without a stated
commission (although the price of the security usually includes a profit to the
dealer).  In underwritten offerings, securities are purchased at a fixed price
which includes an amount of compensation to the underwriter, generally referred
to as the underwriter's concession or discount.  On occasion, certain money
market instruments may be purchased directly from an issuer, in which case no
commissions or discounts are paid.

     The primary consideration of the Adviser in effecting a security
transaction is to obtain the best net price and the most favorable execution of
the order.  However, the Adviser may select broker-dealers which provide them
with research services and may cause a Fund to pay such broker-dealers
commissions which exceed those that other broker-dealers may have charged, if in
their view the commissions are reasonable in relation to the value of the
brokerage and/or research services provided by the broker-dealer.  Certain
research services furnished by brokers may be useful to the Adviser with clients
other than the Trust.  No specific value can be determined for research services
furnished 

                                      B-48
<PAGE>
 
without cost to the Adviser by a broker. The Adviser is of the opinion that
because the material must be analyzed and reviewed by its staff, its receipt
does not tend to reduce expenses, but may be beneficial in supplementing the
Adviser's research and analysis. Therefore, it may tend to benefit the Funds by
improving the quality of the Adviser's investment advice. The investment
advisory fees paid by the Funds are not reduced because the Adviser receives
such services. When making purchases of underwritten issues with fixed
underwriting fees, the Adviser may designate the use of broker-dealers who have
agreed to provide the Adviser with certain statistical, research and other
information.

     Subject to applicable law and regulations, consideration may also be given
to the willingness of particular brokers to sell shares of a Fund as a factor in
the selection of brokers for transactions effected on behalf of a Fund, subject
to the requirement of best price and execution.

     Although the objectives of other accounts or investment companies which the
Adviser manages may differ from those of the Funds, it is possible that, at
times, identical securities will be acceptable for purchase by one or both of
the Funds and one or more other accounts or investment companies which the
Adviser manages.  However, the position of each account or company in the
securities of the same issue may vary with the length of the time that each
account or company may choose to hold its investment in those securities.  The
timing and amount of purchase by each account and company will also be
determined by its cash position.  If the purchase or sale of a security is
consistent with the investment policies of one or more of the Funds and one or
more of these other accounts or companies is considered at or about the same
time, transactions in such securities will be allocated in a manner deemed
equitable by the Adviser.  The Adviser may combine such transactions, in
accordance with applicable laws and regulations, where the size of the
transaction would enable it to negotiate a better price or reduced commission.
However, simultaneous transactions could adversely affect the ability of a Fund
to obtain or dispose of the full amount of a security, which it seeks to
purchase or sell, or the price at which such security can be purchased or sold.

     The following table sets forth the brokerage commissions paid by those
Funds that paid commissions and the amounts of such brokerage commissions which
were paid to affiliated broker-dealers by the Funds for the fiscal year ended
March 31, 1998.

                           1998 BROKERAGE COMMISSIONS
<TABLE>    
<CAPTION>
- --------------------------------------------------------------------------------------- 
                             Aggregate       Amount paid to          Percentage paid to
Fund                         Brokerage       Affiliated Broker-      Affiliated Broker-
                             Commissions     Dealers                 Dealers
- --------------------------------------------------------------------------------------- 
<S>                          <C>             <C>                     <C>
Federal Securities Fund      $0              $0                      0%
- ---------------------------------------------------------------------------------------  
High Income Fund             $0              $0                      0%
- --------------------------------------------------------------------------------------- 
Diversified Income Fund      $0              $0                      0%
- --------------------------------------------------------------------------------------- 
Government Securities        $0              $0                      0%
Fund
- --------------------------------------------------------------------------------------- 
</TABLE>      
    
     For the fiscal year ended March 31, 1997, the Federal Securities Fund, the
High Income Fund, the Diversified Income Fund and the Government Securities Fund
paid brokerage commissions of $250, $1,458, $684 and $750, respectively, of
which $0 was paid to affiliated brokers.  For the fiscal year ended March 31,
1996, the High Income Fund, the Federal Securities Fund and the Diversified
Income      

                                      B-49
<PAGE>
 
    
Fund paid brokerage commissions of $30,000, $400 and $3,000, respectively, of
which $0 was paid to affiliated brokers.  None of the other Funds paid any
commissions during these periods.      
 
              ADDITIONAL INFORMATION REGARDING PURCHASE OF SHARES

     Shares of each of the Funds are sold at the respective net asset value next
determined after receipt of a purchase order, plus a sales charge which, at the
election of the investor, may be imposed either (i) at the time of purchase
(Class A shares), or (ii) on a deferred basis (Class B and Class C shares and
certain Class A shares).  Reference is made to "Purchase of Shares" in the
Prospectus for certain information as to the purchase of Fund shares.
    
     The following tables set forth the front-end sales charges with respect to
Class A shares of each Fund, the amount of the front-end sales charges which was
reallowed to affiliated broker-dealers, and the contingent deferred sales
charges with respect to Class B and Class C shares of each Fund, received by the
Distributor for the fiscal years ended March 31, 1998, 1997 and 1996.      

                                      B-50
<PAGE>
 
                                      1998

<TABLE>    
<CAPTION>
- ----------------------------------------------------------------------------------------------------------- 
                         Front-End Sales       Amount            Amount         Contingent       Contingent
                           Concessions      Reallowed to      Reallowed to       Deferred         Deferred
Fund                     Class A Shares      Affiliated      Non-Affiliated     Sales Charge       Sales
                                           Broker-Dealers    Broker-Dealers    Class B Shares      Charge
                                                                                                  Class C
                                                                                                   Shares
- ----------------------------------------------------------------------------------------------------------- 
<S>                          <C>               <C>              <C>               <C>                <C>
 
Government                   $ 25,103         $ 17,121          $  4,070         $270,398            N/A
Securities Fund
- -----------------------------------------------------------------------------------------------------------  
Federal                        36,021           11,517            16,849           19,862            N/A
Securities Fund
- -----------------------------------------------------------------------------------------------------------  
Diversified                    72,686           20,452            38,553          124,129            N/A
Income Fund
- -----------------------------------------------------------------------------------------------------------  
High Income                   353,552          115,057           178,181          402,985            N/A
Fund
- ----------------------------------------------------------------------------------------------------------- 
Tax Exempt                     62,143           33,967            16,329           69,255            N/A
Insured Fund
- ----------------------------------------------------------------------------------------------------------- 
</TABLE>      

                                      1997

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------- 
                          Front-End Sales      Amount           Amount          Contingent
                           Concessions       Reallowed to      Reallowed to      Deferred
Fund                      Class A Shares      Affiliated      Non-Affiliated    Sales Charge
                                            Broker-Dealers   Broker-Dealers    Class B Shares
- --------------------------------------------------------------------------------------------  
<S>                           <C>               <C>              <C>               <C>
Government                   $ 32,290          $16,822           $10,305         $924,933
Securities Fund
- --------------------------------------------------------------------------------------------  
Federal                        10,220            7,306             2,974           45,178
Securities Fund
- --------------------------------------------------------------------------------------------  
Diversified                    86,113           34,644            36,605          221,016
Income Fund
- --------------------------------------------------------------------------------------------  
High Income                   149,191           57,237            67,696          313,032
Fund
- -------------------------------------------------------------------------------------------- 
Tax Exempt                     41,383           24,953             9,219           88,150
Insured Fund
- -------------------------------------------------------------------------------------------- 
</TABLE>

                                      B-51
<PAGE>
 
                                     1996

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------- 
                            Front-End           Amount            Amount           Contingent
                              Sales           Reallowed        Reallowed to         Deferred
       Fund                  Charge          to Affiliated    Non-Affiliated      Sales Charge
                         Class A Shares     Broker-Dealers    Broker-Dealers     Class B Shares
- -----------------------------------------------------------------------------------------------  
<S>                   <C>               <C>               <C>               <C>
Government                   $ 34,701           $23,047           $ 6,065          $1,767,247
Securities Fund
- -----------------------------------------------------------------------------------------------  
Federal                        51,871            26,836            17,101              92,902
Securities Fund
- -----------------------------------------------------------------------------------------------  
Diversified                    59,956            41,282             9,079             353,984
Income Fund
- -----------------------------------------------------------------------------------------------  
High Income                   110,516            75,941            17,311             379,578
Fund
- ----------------------------------------------------------------------------------------------- 
Tax Exempt                    118,382            78,270            19,723             113,374
Insured Fund
- ----------------------------------------------------------------------------------------------- 
</TABLE>

                                      B-52
<PAGE>
 
    
CDSCS APPLICABLE TO CERTAIN CLASS B SHARES.  Class B shares of the Government
Securities Fund, the Federal Securities Fund, the Diversified Income Fund and
the High Income Fund issued to shareholders in exchange for shares of Old
Government Securities, Old Federal Securities, Old Diversified Income and Old
High Income, respectively, in the Reorganization, are subject to the CDSC
schedule that applied to redemptions of shares of these funds at the time of
reorganization.  Upon a redemption of these shares, the shareholder will receive
credit for the periods both prior to and after the Reorganization during which
the shares were held.  The following table sets forth the rates of the CDSC
applicable to shares of the Government Securities Fund, the Federal Securities
Fund and the High Income Fund:      

<TABLE>
<CAPTION>
============================================================================== 
                                           CONTINGENT DEFERRED SALES CHARGE
                                           AS A PERCENTAGE OF DOLLARS
 YEAR SINCE PURCHASE PAYMENT WAS MADE      INVESTED OR REDEMPTION PROCEEDS
============================================================================== 
<S>                                       <C>
First                                                  5%
- ------------------------------------------------------------------------------  
Second                                                 4%
- ------------------------------------------------------------------------------  
Third                                                  3%
- ------------------------------------------------------------------------------  
Fourth                                                 2%
- ------------------------------------------------------------------------------  
Fifth                                                  1%
- ------------------------------------------------------------------------------ 
Sixth and thereafter                                   0%
==============================================================================
</TABLE>

The following table sets forth the rates of CDSC applicable to shares of the
Diversified Income Fund:

<TABLE>
<CAPTION>
===========================================================================  
                                           CONTINGENT DEFERRED SALES CHARGE
                                           AS A PERCENTAGE OF DOLLARS
YEAR SINCE PURCHASE PAYMENT WAS MADE       INVESTED OR REDEMPTION PROCEEDS
===========================================================================  
<S>                                       <C>
First                                                  3%
- --------------------------------------------------------------------------- 
Second                                                 2%
- --------------------------------------------------------------------------- 
Third                                                  1%
- ---------------------------------------------------------------------------
Fourth and thereafter                                  0%
===========================================================================  
</TABLE>
    
     Any Class B shares purchased after the date of the Reorganization (other
than through the reinvestment of dividends and distributions, which are not
subject to the CDSC) are subject to the CDSC schedule reflected in the
Prospectus.      

CONVERSION FEATURE APPLICABLE TO CERTAIN CLASS B SHARES.  Shareholders of Class
B shares of the Government Securities Fund, the Federal Securities Fund, the
Diversified Income Fund and the High Income Fund issued in exchange for shares
of Old Government Securities, Old Federal Securities, Old Diversified Income and
Old High Income, respectively, in the Reorganization, will receive credit for
the periods both prior to and after the Reorganization during which the shares
were held, for purposes of computing the seven year holding period applicable to
the conversion feature.

                                      B-53
<PAGE>
 
WAIVER OF CDSCS.  As discussed under "Purchase of Shares" in the Prospectus,
CDSCs may be waived on redemptions of Class B and Class C shares under certain
circumstances.  The conditions set forth below are applicable with respect to
the following situations with the proper documentation:

     Death.  CDSCs may be waived on redemptions within one year following the
     ------                                                                  
death (i) of the sole shareholder on an individual account, (ii) of a joint
tenant where the surviving joint tenant is the deceased's spouse, or (iii) of
the beneficiary of a Uniform Gifts to Minors Act, Uniform Transfers to Minors
Act or other custodial account.  The CDSC waiver is also applicable in the case
where the shareholder account is registered as community property.  If, upon the
occurrence of one of the foregoing, the account is transferred to an account
registered in the name of the deceased's estate, the date of CDSC will be waived
on any redemption from the estate account occurring within one year of the
death.  If the Class B shares are not redeemed within one year of the date of
death, they will remain Class B shares and be subject to the applicable CDSC, if
any, when redeemed.

     Disability.  CDSCs may be waived on redemptions occurring within one year
     -----------                                                              
after the sole shareholder on an individual account or a joint tenant on a
spousal joint tenant account becomes disabled (as defined in Section 72(m)(7) of
the Code).   To be eligible for such waiver, (i) the  disability must arise
after the purchase of shares and (ii) the disabled shareholder must have been
under age 65 at the time of the initial determination of disability.  If the
account is transferred to a new registration and then a redemption is requested,
the applicable CDSC will be charged.
    
PURCHASES THROUGH THE DISTRIBUTOR.  An investor may purchase shares of a Fund
through dealers which have entered into selected dealer agreements with the
Distributor.  An investor's dealer who has entered into a distribution
arrangement with the Distributor is expected to forward purchase orders and
payment promptly to the Fund.  Orders received by the Distributor before the
close of business will be executed at the offering price determined at the close
of regular trading on the New York Stock Exchange ("NYSE") that day.  Orders
received by the Distributor after the close of business will be executed at the
offering price determined after the close of the NYSE on the next trading day.
The Distributor reserves the right to cancel any purchase order for which
payment has not been received by the fifth business day following the
investment.  A Fund will not be responsible for delays caused by dealers.     

PURCHASE BY CHECK. Checks should be made payable to the specific Fund or to
"SunAmerica Funds".  If the payment is for a retirement plan account for which
the Adviser serves as fiduciary, please indicate on the check that payment is
for such an account. In the case of a new account, purchase orders by check must
be submitted directly by mail to SunAmerica Fund Services, Inc., Mutual Fund
Operations, The SunAmerica Center, 733 Third Avenue, New York, New York 10017-
3204, together with payment for the purchase price of such shares and a
completed New Account Application.  Payment for subsequent purchases should be
mailed to SunAmerica Fund Services, Inc., c/o NFDS, P.O. Box 419373, Kansas
City, Missouri 64141-6373 and the shareholder's Fund account number should
appear on the check.  For fiduciary retirement plan accounts, both initial and
subsequent purchases should be mailed to SunAmerica Fund Services, Inc., Mutual
Fund Operations, The SunAmerica Center, 733 Third Avenue, New York, New York
10017-3204. Certified checks are not necessary but checks are accepted subject
to collection at full face value in United States funds and must be drawn on a
bank located in the United States.  Upon receipt of the completed New Account
Application and payment check, the Transfer Agent will purchase full and
fractional shares of the applicable Fund at the net asset value next computed
after the check is received, plus the applicable sales charge.  Subsequent
purchases of shares of each Fund may be purchased directly through the Transfer
Agent.  SAFS reserves the right to reject any check made payable other than in
the manner indicated above. 

                                      B-54
<PAGE>
 
Under certain circumstances, a Fund will accept a multi-party check (e.g., a
check made payable to the shareholder by another party and then endorsed by the
shareholder to the Fund in payment for the purchase of shares); however, the
processing of such a check may be subject to a delay. The Funds do not verify
the authenticity of the endorsement of such multi-party check, and acceptance of
the check by a Fund should not be considered verification thereof. Neither the
Funds nor their affiliates will be held liable for any losses incurred as a
result of a fraudulent endorsement. There are restrictions on the redemption of
shares purchased by check for which funds are being collected. (See "Redemption
of Shares.")

PURCHASE THROUGH SAFS.  SAFS will effect a purchase order on behalf of a
customer who has an investment account upon confirmation of a verified credit
balance at least equal to the amount of the purchase order (subject to the
minimum $500 investment requirement for wire orders).  If such order is received
at or prior to the Fund's close of business, the purchase of shares of a Fund
will be effected on that day.  If the order is received after the Fund's close
of business, the order will be effected on the next business day.

PURCHASE BY FEDERAL FUNDS WIRE.  An investor may make purchases by having his or
her bank wire Federal funds to the Trust's Transfer Agent.  Federal funds
purchase orders will be accepted only on a day on which the Trust and the
Transfer Agent are open for business.  In order to insure prompt receipt of a
Federal funds wire, it is important that these steps be followed:

          1.   You must have an existing SunAmerica Fund Account before wiring
               funds. To establish an account, complete the New Account
               Application and send it via facsimile to SunAmerica Fund
               Services, Inc. at: (212) 551-5343.

          2.   Call SunAmerica Fund Services' Shareholder/Dealer Services, toll
               free at (800) 858-8850, extension 5125 to obtain your new account
               number.

          3.   Instruct the bank to wire the specified amount to the Transfer
               Agent: State Street Bank and Trust Company, Boston, MA, 
               ABA# 0110-00028; DDA# 99029712, SunAmerica [name of Fund, 
               Class __] (include shareholder name and account number).

WAIVER OF SALES CHARGES WITH RESPECT TO CERTAIN PURCHASES OF CLASS A SHARES.  To
the extent that sales are made for personal investment purposes, the sales
charge is waived as to Class A shares purchased by current or retired officers,
directors and other full-time employees of SunAmerica and its affiliates, as
well as members of the selling group and family members of the foregoing.  In
addition, the sales charge is waived with respect to shares purchased by certain
qualified retirement plans or employee benefit plans (other than IRAs), which
are sponsored or administered by SunAmerica or an affiliate thereof.  Further,
the sales charge is waived with respect to shares purchased by "wrap accounts"
for the benefit of clients of broker-dealers, financial institutions or
financial planners adhering to the following standards established by the
Distributor: (i) the broker-dealer, financial institution or financial planner
charges its client(s) an advisory fee based on the assets under management on an
annual basis, and (ii) such broker-dealer, financial institution or financial
planner does not advertise that shares of the Funds may be purchased by clients
at net asset value. Shares purchased under this waiver may not be resold except
to the Fund.  Shares are offered at net asset value to the foregoing persons
because of anticipated economies in sales effort and sales related expenses.
Reductions in sales charges apply to purchases or shares by a "single person"
including an individual; members of a family unit comprising husband, wife and
minor children; or a trustee or other 

                                      B-55
<PAGE>
 
fiduciary purchasing for a single fiduciary account. Complete details concerning
how an investor may purchase shares at reduced sales charges may be obtained by
contacting the Distributor.

REDUCED SALES CHARGES (CLASS A SHARES ONLY).  As discussed under "Purchase of
Shares" in the Prospectus, investors in Class A shares of a Fund may be entitled
to reduced sales charges pursuant to the following special purchase plans made
available by the Trust.

COMBINED PURCHASE PRIVILEGE.  The following persons may qualify for the sales
- ---------------------------                                                  
charge reductions or eliminations by combining purchases of Fund shares into a
single transaction:

          (i) an individual, or a "company" as defined in Section 2(a)(8) of the
     1940 Act (which includes corporations which are corporate affiliates of
     each other);

          (ii) an individual, his or her spouse and their minor children,
     purchasing for his, her or their own account;

          (iii) a trustee or other fiduciary purchasing for a single trust
     estate or single fiduciary account (including a pension, profit-sharing, or
     other employee benefit trust created pursuant to a plan qualified under
     Section 401 of the Code);

          (iv) tax-exempt organizations qualifying under Section 501(c)(3) of
     the Code (not including 403(b) plans);

          (v) employee benefit plans of a single employer or of affiliated
     employers, other than 403(b) plans; and

          (vi) group purchases as described below.

     A combined purchase currently may also include shares of other funds in the
SunAmerica Family of Mutual Funds (other than money market funds) purchased at
the same time through a single investment dealer, if the dealer places the order
for such shares directly with the Distributor.

RIGHTS OF ACCUMULATION.  A purchaser of Fund shares may qualify for a reduced
- -----------------------                                                      
sales charge by combining a current purchase (or combined purchases as described
above) with shares previously purchased and still owned; provided the cumulative
value of such shares (valued at cost or current net asset value, whichever is
higher), amounts to $50,000 or more.  In determining the shares previously
purchased, the calculation will include, in addition to other Class A shares of
the particular Fund that were previously purchased, shares of the other classes
of the same Fund, as well as shares of any class of any other Fund or of any of
the other Funds advised by the Adviser, as long as such shares were sold with a
sales charge or acquired in exchange for shares purchased with such a sales
charge.

     The shareholder's dealer, if any, or the shareholder, must notify the
Distributor at the time an order is placed of the applicability of the reduced
charge under the Right of Accumulation.  Such notification must be in writing by
the dealer or shareholder when such an order is placed by mail.  The reduced
sales charge will not be granted if:  (a) such information is not furnished at
the time of the order; or (b) a review of the Distributor's or the Transfer
Agent's records fails to confirm the investor's represented holdings.

                                      B-56
<PAGE>
 
LETTER OF INTENT.  A reduction of sales charges is also available to an investor
- ----------------                                                                
who, pursuant to a written Letter of Intent which is set forth in the New
Account Application, establishes a total investment goal in Class A shares of
one or more Funds to be achieved through any number of investments over a
thirteen-month period, of $50,000 or more.  Each investment in such Funds made
during the period will be subject to a reduced sales charge applicable to the
goal amount.  The initial purchase must be at least 5% of the stated investment
goal and shares totaling 5% of the dollar amount of the Letter of Intent will be
held in escrow by the Transfer Agent, in the name of the investor.  Shares of
any class of shares of any Fund, or of other funds advised by the Adviser which
impose a sales charge at the time of purchase, which the investor intends to
purchase or has previously purchased during a 30-day period prior to the date of
execution of the Letter of Intent and still owns, may also be included in
determining the applicable reduction; provided, the dealer or shareholder
notifies the Distributor of such prior purchase(s).

     The Letter of Intent does not obligate the investor to purchase, nor the
Trust to sell, the indicated amounts of the investment goal.  In the event the
investment goal is not achieved within the thirteen-month period, the investor
is required to pay the difference between the sales charge otherwise applicable
to the purchases made during this period and sales charges actually paid.  Such
payment may be made directly to the Distributor or, if not paid, the Distributor
is authorized by the Letter of Intent to liquidate a sufficient number of
escrowed shares to obtain such difference.  If the goal is exceeded and
purchases pass the next sales charge break-point, the sales charge on the entire
amount of the purchase that results in passing that break-point, and on
subsequent purchases, will be subject to a further reduced sales charge in the
same manner as set forth above under "Rights of Accumulation," but there will be
no retroactive reduction of sales charges on previous purchases.  At any time
while a Letter of Intent is in effect, a shareholder may, by written notice to
the Distributor, increase the amount of the stated goal.  In that event, shares
of the applicable Funds purchased during the previous 90-day period and still
owned by the shareholder will be included in determining the applicable sales
charge.  The 5% escrow and the minimum purchase requirement will be applicable
to the new stated goal.  Investors electing to purchase shares of one or more of
the Funds pursuant to this purchase plan should carefully read such Letter of
Intent.  Investors electing to purchase shares of one or more of the Funds
pursuant to this purchase plan should carefully read such Letter of Intent.

REDUCED SALES CHARGE FOR GROUP PURCHASES.  Members of qualified groups may
- ----------------------------------------                                  
purchase Class A shares of the Funds under the combined purchase privilege as
described above.

     To receive a rate based on combined purchases, group members must purchase
Class A shares of a Fund through a single investment dealer designated by the
group.  The designated dealer must transmit each member's initial purchase to
the Distributor, together with payment and completed New Account Application.
After the initial purchase, a member may send funds for the purchase of Class A
shares directly to the Transfer Agent.  Purchases of a Fund's shares are made at
the public offering price based on the net asset value next determined after the
Distributor or the Transfer Agent receives payment for the Class A shares.  The
minimum investment requirements described above apply to purchases by any group
member. Class B or Class C shares are not included in calculating the purchased
amount of a Fund's shares.
    
     Qualified groups include the employees of a corporation or a sole
proprietorship, members and employees of a partnership or association, or other
organized groups of persons (the members of which may include other qualified
groups) provided that: (i) the group has at least 25 members of which at least
        -------- ----                                                         
ten members participate in the initial purchase; (ii) the group has been in
existence for at least six months; (iii) the group has some purpose in addition
to the purchase of investment company shares at a reduced sales charge; (iv) the
group's sole organizational nexus or connection is not that the members are
credit card      

                                      B-57
<PAGE>
 
customers of a bank or broker-dealer, clients of an investment adviser or
security holders of a company; (v) the group agrees to provide its designated
investment dealer access to the group's membership by means of written
communication or direct presentation to the membership at a meeting on not less
frequently than an annual basis; (vi) the group or its investment dealer will
provide annual certification, in form satisfactory to the Transfer Agent, that
the group then has at least 25 members and that at least ten members
participated in group purchases during the immediately preceding 12 calendar
months; and (vii) the group or its investment dealer will provide periodic
certification, in form satisfactory to the Transfer Agent, as to the eligibility
of the purchasing members of the group.

     Members of a qualified group include: (i) any group which meets the
requirements stated above and which is a constituent member of a qualified
group; (ii) any individual purchasing for his or her own account who is carried
on the records of the group or on the records of any constituent member of the
group as being a good standing employee, partner, member or person of like
status of the group or constituent member; or (iii) any fiduciary purchasing
shares for the account of a member of a qualified group or a member's
beneficiary.  For example, a qualified group could consist of a trade
association which would have as its members individuals, sole proprietors,
partnerships and corporations.  The members of the group would then consist of
the individuals, the sole proprietors and their employees, the members of the
partnership and their employees, and the corporations and their employees, as
well as the trustees of employee benefit trusts acquiring a Fund's shares for
the benefit of any of the foregoing.

     Interested groups should contact their investment dealer or the
Distributor.  The Trust reserves the right to revise the terms of or to suspend
or discontinue group sales with respect to shares of the Funds at any time.

     NET ASSET VALUE TRANSFER PROGRAM.  Investors may purchase Class A shares of
     --------------------------------                                           
a Fund at net asset value to the extent that the investment represents the
proceeds from a redemption of a non-SunAmerica mutual fund in which the investor
either (a) paid a front-end sales load or (b) was subject to, or paid a CDSC on
the redemption  proceeds.  Nevertheless, the Distributor will pay a commission
to any dealer who initiates or is responsible for such an investment, in the
amount of .50% of the amount invested, subject, however, to forfeiture in the
event of a redemption during the first year from the date of purchase.  In
addition, it is essential that an NAV Transfer Program Form accompany the New
Account Application to indicate that the investment is intended to participate
in the Net Asset Value Transfer Program (formerly, Exchange Program for
Investment Company Shares).  This program may be revised or terminated without
notice by the Distributor.  For current information, contact Shareholder/Dealer
Services at (800) 858-8850.

             ADDITIONAL INFORMATION REGARDING REDEMPTION OF SHARES

     Reference is made to "Redemption of Shares" in the Prospectus for certain
information as to the redemption of Fund shares.

     If the Trustees determine that it would be detrimental to the best
interests of the remaining shareholders of a Fund to make payment wholly or
partly in cash, the Trust, having filed with the SEC a notification of election
pursuant to Rule 18f-1 on behalf of each of the Funds, may pay the redemption
price in whole  or in part, by a distribution in kind of securities from a Fund
in lieu of cash.  In conformity with applicable rules of the SEC, the Funds are
committed to pay in cash all requests for redemption, by any shareholder of
record, limited in amount with respect to each shareholder during any 90-day
period to the lesser of (i) $250,000, or (ii) 1% of the net asset value of the
applicable Fund at the beginning of such 

                                      B-58
<PAGE>
 
period. If shares are redeemed in kind, the redeeming shareholder would incur
brokerage costs in converting the assets into cash. The method of valuing
portfolio securities is described below in the section entitled "Determination
of Net Asset Value," and such valuation will be made as of the same time the
redemption price is determined.

                        DETERMINATION OF NET ASSET VALUE
    
     The Trust is open for business on any day the NYSE is open for regular
trading. Shares are valued each day as of the close of regular trading on the
NYSE (generally, 4:00 P.M., Eastern time).  Each Fund calculates the net asset
value of its shares separately by dividing the total value of each class's net
assets by the shares outstanding of such class.      

     Stocks are stated at value based upon closing sales prices reported on
recognized securities exchanges or, for listed securities having no sales
reported and for unlisted securities, upon last reported bid prices.  Non-
convertible bonds, debentures, other long-term debt securities and short-term
securities with original or remaining maturities in excess of 60 days, are
normally valued at prices obtained for the day of valuation from a bond pricing
service of a major dealer in bonds, when such prices are available; however, in
circumstances in which the Manager deems it appropriate to do so, an over-the-
counter or exchange quotation at the mean of representative bid or asked prices
may be used.  Securities traded primarily on securities exchanges outside the
United States are valued at the last sale price on such exchanges on the day of
valuation, or if there is no sale on the day of valuation, at the last-reported
bid price. If a security's price is available from more than one foreign
exchange, a Fund uses the exchange that is the primary market for the security.
Short-term securities with 60 days or less to maturity are amortized to maturity
based on their cost to the Trust if acquired within 60 days of maturity or, if
already held by the Trust on the 60th day, are amortized to maturity based on
the value determined on the 61st day. Options traded on national securities
exchanges are valued as of the close of the exchange on which they are traded.
Futures and options traded on commodities exchanges are valued at their last
sale price as of the close of such exchange.  Other securities are valued on the
basis of last sale or bid price (if a last sale price is not available) in what
is, in the opinion of the Manager, the broadest and most representative market,
that may be either a securities exchange or the over-the-counter market.  Where
quotations are not readily available, securities are valued at fair value as
determined in good faith in accordance with procedures adopted by the Board of
Trustees. The fair value of all other assets is added to the value of securities
to arrive at the respective Fund's total assets.

     A Fund's liabilities, including proper accruals of expense items, are
deducted from total assets.

                                PERFORMANCE DATA

     Each Fund may advertise performance data that reflects various measures of
total return and yield. An explanation of the data presented and the methods of
computation that will be used are as follows.

     A Fund's performance may be compared to the historical returns of various
investments, performance indices of those investments or economic indicators,
including, but not limited to, stocks, bonds, certificates of deposit, money
market funds and U.S. Treasury Bills.  Certain of these alternative investments
may offer fixed rates of return and guaranteed principal and may be insured.

                                      B-59
<PAGE>
 
     Average annual total return is determined separately for Class A, Class B
and Class C shares in accordance with a formula specified by the SEC. Average
annual total return is computed by finding the average annual compounded rates
of return for the 1-, 5- and 10-year periods or for the lesser included periods
of effectiveness. The formula used is as follows:

                               P(1 + T)/n/ = ERV
 
          P   =     a hypothetical initial purchase payment of $1,000
          T   =     average annual total return
          N   =     number of years
         ERV  =     ending redeemable value of a hypothetical $1,000 payment
                    made
                    at the beginning of the 1-, 5-, or 10- year periods at the
                    end of the 1-, 5-, or 10-year periods (or fractional portion
                    thereof).

     The above formula assumes that:

          1.   The maximum sales load (i.e., either the front-end sales load in
               the case of the Class A shares or the deferred sales load that
               would be applicable to a complete redemption of the investment at
               the end of the specified period in the case of the Class B and
               Class C shares) is deducted from the initial $1,000 purchase
               payment;
          2.   All dividends and distributions are reinvested at net asset
               value; and
          3.   Complete redemption occurs at the end of the 1-, 5-, or 10- year
               periods or fractional portion thereof with all nonrecurring
               charges deducted accordingly.
    
The Funds' average annual total return for the 1-, 5- and 10-year periods (or
from date of inception, if sooner) ended March 31, 1998, are as follows:      

<TABLE>    
<CAPTION>
- ---------------------------------------------------------------------------------------
Class A Shares                   Since Inception    One Year    Five Years    Ten Years
- --------------                   ---------------    --------    ----------    ---------
- ---------------------------------------------------------------------------------------
<S>                               <C>                <C>         <C>           <C>
Government Securities Fund       /1/      4.67%       4.42%        N/A           N/A
- --------------------------------------------------------------------------------------- 
Federal Securities Fund          /1/      5.78%       6.95%        N/A           N/A
- --------------------------------------------------------------------------------------- 
Diversified Income Fund          /1/      6.15%      10.33%        N/A           N/A
- --------------------------------------------------------------------------------------- 
High Income Fund                 /2/      9.07%      14.37%        8.33%        9.81%
- ---------------------------------------------------------------------------------------
Tax Exempt Insured Fund          /3/      6.48%       5.04%        4.95%        6.31%
- ---------------------------------------------------------------------------------------
</TABLE>      

- ---------------------
/1/  From date of October 1, 1993.

/2/  From date of inception of September 16, 1986.

/3/  From date of inception of November 21, 1985.

                                      B-60
<PAGE>
 
<TABLE>    
<CAPTION>
- ----------------------------------------------------------------------------------------- 
Class B Shares                    Since Inception     One Year    Five Years    Ten Years
- --------------                    ---------------     --------    ----------    --------- 
- ----------------------------------------------------------------------------------------- 
<S>                               <C>                  <C>         <C>           <C>
Government Securities Fund        /4/      6.24%        4.80%        4.79%        6.34%
- -----------------------------------------------------------------------------------------  
Federal Securities Fund           /5/      8.27%        7.54%        5.46%        7.46%
- -----------------------------------------------------------------------------------------  
Diversified Income Fund           /6/      6.50%       11.11%        6.88%          N/A
- -----------------------------------------------------------------------------------------  
High Income Fund                  /7/      8.04%       15.31%         N/A           N/A
- ----------------------------------------------------------------------------------------- 
Tax Exempt Insured Fund           /7/      4.16%        5.65%         N/A           N/A
- -----------------------------------------------------------------------------------------
</TABLE>      

<TABLE>    
<CAPTION>
Class C Shares        Since Inception    One Year   Five Years   Ten Years
- --------------        ---------------    --------   ----------   ---------
- --------------------------------------------------------------------------
<S>                   <C>                  <C>        <C>          <C>
High Income Fund       /8/     2.18%       N/A         N/A          N/A
- --------------------------------------------------------------------------
</TABLE>     

     Each Fund may advertise cumulative, rather than total average return, for
each class of its shares for periods of time other than the 1-, 5-  and 10-year
periods or fractions thereof, as discussed above.  Such return data will be
computed in the same manner as that of average annual total return, except that
the actual cumulative return will be computed.

     Each Fund may also advertise performance data that reflects yield. Yield is
determined separately for Class A, Class B and Class C shares in accordance with
a standardized formula prescribed by the SEC and is not indicative of the
amounts which were or will be paid to shareholders. The current yield quoted in
a Fund's advertisements is computed by dividing the net investment income per
share earned during the 30-day period by the maximum offering price per share on
the last day of the period. The following formula illustrates the computation:

                        Yield = 2 [{A - B + 1}/6/  - 1 ]
                                    -----               
                                       CD

          A =  dividends and interest earned during the period
          B =  expenses accrued for the period (net of reimbursements)
          C =  the average daily number of shares outstanding during the period
               that were entitled to receive dividends
          D =  the maximum offering price per share on the last day of the
               period
               

- -------------------
/4/  From date of inception of March 3, 1986.

/5/  From date of inception of April 25, 1983.

/6/  From date of inception of April 6, 1991.

/7/  From date of inception of October 1, 1993.

/8/  From date of inception of February 2, 1998.

                                      B-61
<PAGE>
 
         
     The yields for the one month periods ended March 31,  1998, 1997 and 1996
are as follows:      

<TABLE>    
<CAPTION>
- --------------------------------------------------------------------------------------------------------
FUND                    MARCH 31, 1998                   MARCH 31, 1997        MARCH 31, 1996
- --------------------------------------------------------------------------------------------------------
                        Class A    Class B    Class C    Class A    Class B    Class A        Class B
- --------------------------------------------------------------------------------------------------------
<S>                     <C>        <C>        <C>        <C>         <C>        <C>           <C>
Government               4.94%      4.57%      N/A        5.53%      5.15%      5.71%          5.33%
Securities Fund
- -------------------------------------------------------------------------------------------------------- 
Federal Securities       4.67%      4.25%      N/A        5.38%      4.98%      5.44%          5.09%
Fund
- -------------------------------------------------------------------------------------------------------- 
Diversified              8.48%      8.31%      N/A        8.63%      8.42%      8.15%          7.88%
Income Fund
- -------------------------------------------------------------------------------------------------------- 
High Income              8.83%      8.69%      8.70%      9.10%      8.86%      9.02%          8.91%
Fund
- --------------------------------------------------------------------------------------------------------
Tax Exempt               4.00%      3.53%      N/A        4.53%      4.10%      4.50%          4.08%
Insured Fund
- --------------------------------------------------------------------------------------------------------
</TABLE>     

     Current yield is not indicative of the amount which was or will be paid to
the shareholders.  The amount paid to shareholders is reflected in the quoted
current distribution rate.  The current distribution rate is computed by
annualizing the total amount of dividends per share paid by each Fund during the
past month and dividing by the current maximum offering price.  Under some
circumstances it may be appropriate to use the dividends paid over the past
year.  The current distribution rate differs from current yield in that it
includes amounts distributed to shareholders from sources other than dividends
and interest, such as short-term capital gains or option writing premiums and is
calculated over a different period of time.  Such rates will be accompanied in
advertisements by standardized yield calculations as promulgated by the SEC.

COMPARISONS
- -----------

     Each Fund may compare its total return or yield to similar measures as
calculated by various publications, services, indices, or averages.  Such
comparisons are made to assist in evaluating an investment in a Fund.  The
following references may be used:

a)   Dow Jones Composite Average or its component averages -- an unmanaged index
     composed of 30 blue-chip industrial corporation stocks (Dow Jones
     Industrial Average), 15 utilities company stocks (Dow Jones Utilities
     Average) and 20 transportation company stocks (Dow Jones Transportation
     Average). Comparisons of performance assume reinvestment of dividends.

b)   Standard & Poor's 500 Stock Index or its component indices -- an unmanaged
     index composed of 400 industrial stocks, 40 financial stocks, 40 utilities
     stocks and 20 transportation stocks. Comparisons of performance assume
     reinvestment of dividends.

c)   Standard & Poor's 100 Stock Index -- an unmanaged index based on the prices
     of 100 blue chip stocks, including 92 industrials, one utility, two
     transportation companies and five financial institutions. The Standard &
     Poor's 100 Stock Index is a smaller, more flexible index for options
     trading.

d)   The NYSE composite or component indices -- unmanaged indices of all
     industrial, utilities, transportation and finance stocks listed on the
     NYSE.

                                      B-62
<PAGE>
 
e)   Wilshire 5000 Equity Index or its component indices -- represents the
     return on the market value of all common equity securities for which daily
     pricing is available. Comparisons of performance assume reinvestment of
     dividends.

f)   Russell 3000 and 2000 Indices -- represents the top 3,000 and the next
     2,000 stocks traded on the NYSE, American Stock Exchange and National
     Association of Securities Dealers Automated Quotations, by market
     capitalization.

g)   Lipper: Mutual Fund Performance Analysis, Fixed Income Analysis and Mutual
     Fund Indices --measures total return and average current yield for the
     mutual fund industry. Ranks individual mutual fund performance over
     specified time periods assuming reinvestment of all distributions,
     exclusive of sales charges.

h)   CDA Mutual Fund Report, published by CDA Investment Technologies, Inc.,
     analyzes price, current yield, risk, total return and average rate of
     return (average annual compounded growth rate) over specified time periods
     for the mutual fund industry.

i)   Mutual Fund Source Book, published by Morningstar, Inc. -- analyzes price,
     risk and total return for the mutual fund industry.

j)   Financial publications: The Wall Street Journal, Business Week, Changing
     Times, Financial World, Forbes, Fortune, Money, Pension and Investment Age,
     United Mutual Fund Selector, and Wiesenberger Investment Companies Service
     and other publications containing financial analyses which rate mutual fund
     performance over specified time periods.

k)   Consumer Price Index (or Cost of Living Index), published by the U.S.
     Bureau of Labor Statistics --a statistical measure of periodic change in
     the price of goods and services in major expenditure groups.

l)   Stocks, Bonds, Bills, and Inflation, published by Ibbotson Associates --
     historical measure of yield, price, and total return for common and small
     company stock, long-term government bonds, treasury bills and inflation.

m)   Savings and Loan Historical Interest Rates as published in the U.S. Savings
     & Loan League Fact Book.

n)   Shearson-Lehman Municipal Bond Index and Government/Corporate Bond Index --
     unmanaged indices that track a basket of intermediate and long-term bonds.
     Reflect total return and yield and assume dividend reinvestment.

o)   Salomon GNMA Index published by Salomon Brothers Inc. -- Market value of
     all outstanding 30-year GNMA Mortgage Pass-Through Securities that includes
     single family and graduated payment mortgages.

p)   Salomon Mortgage Pass-Through Index published by Salomon Brothers Inc. --
     Market value of all outstanding agency mortgage pass-through securities
     that includes 15- and 30-year FNMA, FHLMC and GNMA Securities.

                                      B-63
<PAGE>
 
q)   Value Line Geometric Index -- broad based index made up of approximately
     1700 stocks each of which have an equal weighting.

r)   Morgan Stanley Capital International EAFE Index -- an arithmetic, market
     value-weighted average of the performance of over 900 securities on the
     stock exchanges of countries in Europe, Australia and the Far East.

s)   Goldman Sachs 100 Convertible Bond Index -- currently includes 67 bonds and
     33 preferred stocks. The original list of names was generated by screening
     for convertible issues of $100 million or more in market capitalization.
     The index is priced monthly.

t)   Salomon Brothers High Grade Corporate Bond Index -- consists of publicly
     issued, non-convertible corporate bonds rated "AA" or "AAA." It is a value-
     weighted, total return index, including approximately 800 issues.

u)   Salomon Brothers Broad Investment Grade Bond Index -- is a market-weighted
     index that contains approximately 4700 individually priced investment grade
     corporate bonds rated "BBB" or better, U.S. Treasury/agency issues and
     mortgage pass-through securities.

v)   Salomon Brothers World Bond Index -- measures the total return performance
     of high-quality securities in major sectors of the international bond
     market. The index covers approximately 600 bonds from 10 currencies:

     Australian Dollars             Netherlands Guilders
     Canadian Dollars               Swiss Francs
     European Currency Units        UK Pound Sterling
     French Francs                  U.S. Dollars
     Japanese Yen                   German Deutsche Marks

w)   J.P. Morgan Global Government Bond Index -- a total return, market
     capitalization-weighted index, rebalanced monthly, consisting of the
     following countries: Australia, Belgium, Canada, Denmark, France, Germany,
     Italy, Japan, The Netherlands, Spain, Sweden, the United Kingdom and the
     United States.

x)   Shearson Lehman LONG-TERM Treasury Bond Index -- is comprised of all bonds
     covered by the Shearson Lehman Hutton Treasury Bond Index with maturities
     of 10 years or greater.

y)   NASDAQ Industrial Index -- is comprised of more than 3,000 industrial
     issues. It is a value-weighted index calculated on pure change only and
     does not include income.

z)   The MSCI Combined Far East Free ex Japan Index -- a market capitalization
     weighted index comprised of stocks in Hong Kong, Indonesia, Korea,
     Malaysia, Philippines, Singapore and Thailand. Korea is included in this
     index at 20% of its market capitalization.

aa)  First Boston High Yield Index -- generally includes over 180 issues with an
     average maturity range of seven to ten years with a minimum capitalization
     of $100 million. All issues are individually trader-priced monthly.

                                      B-64
<PAGE>
 
bb)  Merrill Lynch High Yield Bond Master Index -- generally includes over 500
     issues rated "BB+" to "CCC-" with an aggregate par value of approximately
     $100 billion.

cc)  Morgan Stanley Capital International World Index -- An arithmetic, market
     value-weighted average of the performance of over 1,470 securities list on
     the stock exchanges of countries in Europe, Australia, the Far East, Canada
     and the United States.

dd)  In assessing such comparisons of performance, an investor should keep in
     mind that the composition of the investments in the reported indices and
     averages is not identical to a Fund's portfolio, that the averages are
     generally unmanaged and that the items included in the calculations of such
     averages may not be identical to the formula used by a Fund to calculate
     its figures. In addition, there can be no assurance that a Fund will
     continue its performance as compared to such other standards.

                       DIVIDENDS, DISTRIBUTIONS AND TAXES

DIVIDENDS AND DISTRIBUTIONS.  Each Fund intends to distribute to the registered
holders of its shares substantially all of its net investment income, which
includes dividends, interest and net short-term capital gains, if any, in excess
of any net capital losses.  Each Fund intends to distribute any net long-term
capital gains in excess of any net short-term capital losses from the sale of
assets held more than twelve months. Dividends from net investment income are
declared daily and paid monthly.  Dividends are paid on or about the fifteenth
day of the month.  Net capital gains, if any, will be paid annually.  In
determining amounts of capital gains to be distributed, any capital loss carry-
forwards from prior years will be offset against capital gains.

     Distributions will be paid in additional Fund shares based on the net asset
value at the close of business on the record date, unless the dividends total in
excess of $10 per distribution period and the shareholder notifies the Fund at
least five business days prior to the payment date to receive such distributions
in cash.
    
TAXES.  Each Fund is qualified, intends to remain qualified and elects to be
treated as a regulated investment company under Subchapter M of the Code for
each taxable year.  In order to remain qualified as a regulated investment
company, each Fund generally must, among other things:  (a) derive at least 90%
of its gross income from dividends, interest, proceeds from loans of stock or
securities and certain other related income; (b) diversify its holdings so that,
at the end of each fiscal quarter, (i) 50% of the market value of each Fund's
assets is represented by cash, government securities, securities of other
regulated investment companies and other securities limited, in respect of any
one issuer, to an amount no greater than 5% of each Fund's assets and not
greater than 10% of the outstanding voting securities of such issuer, and (ii)
not more than 25% of the value of its assets is invested in the securities of
any one issuer (other than government securities or the securities of other
regulated investment companies).      

     As a regulated investment company, each Fund will not be subject to U.S.
Federal income tax on its income and capital gains which it distributes as
dividends or capital gains distributions to shareholders provided that it
distributes to shareholders at least equal to the sum of 90% of its investment
company taxable income and 90% of its net tax-exempt interest income for the
taxable year. Each Fund intends to distribute sufficient income to meet this
qualification requirement.

                                      B-65
<PAGE>
 
     Under the Code, amounts not distributed on a timely basis in accordance
with a calendar year distribution requirement are subject to a nondeductible 4%
excise tax.  To avoid the tax, each Fund must distribute during each calendar
year (1) at least 98% of its ordinary income (not taking into account any
capital gains or losses) for the calendar year, (2) at least 98% of its net
capital gains, i.e., capital gains in excess of its capital losses for the 12-
month period ending on October 31 of the calendar year, and (3) all ordinary
income and net capital gains for the previous years that were not distributed
during such years. To avoid application of the excise tax, each Fund intends to
make distributions in accordance with the calendar year distribution
requirement.  A distribution will be treated as paid during the calendar year if
it actually is paid during calendar year or if declared by each Fund in October,
November or December of such year, payable to shareholders of record on a date
in such month and paid by each Fund during January of the following year.  Any
such distributions paid during January of the following year will be taxable to
shareholders as of December 31, rather than the date on which the distributions
are received.
    
     Distributions of net investment income and short-term capital gains
("ordinary income dividends") are taxable to the shareholder as ordinary
dividend income regardless of whether the shareholder receives such
distributions in additional shares or in cash.  The portion of such dividends
received from each Fund that will be eligible for the dividends received
deduction for corporations will be determined on the basis of the amount of each
Fund's gross income, exclusive of capital gains from sales of stock or
securities, which is derived as dividends from domestic corporations, other than
certain tax-exempt corporations and certain real estate investment trusts, and
will be designated as such in a written notice to shareholders mailed not later
than 60 days after the end of each fiscal year.  Because each of the Funds will
invest principally in debt securities, it is not anticipated that a significant
portion of dividends paid by any Fund will qualify for the dividends received
deduction.  Distributions of net capital gains, if any, are taxable as capital
gains regardless of whether the shareholder receives such distributions in
additional shares or in cash or how long the investor has held his or her shares
and are not eligible for the dividends received deduction for corporations. At
March 31, 1998, Government Securities Fund, Diversified Income Fund, High Income
Fund, and Tax Exempt Insured Fund had capital loss carry-forwards of
$29,467,409; $24,716,935; $22,767,991; and $3,338,986, respectively, which are
available to the extent not utilized to offset future gains from 1999 through
2005.  The utilization of such losses will be subject to annual limitations
under the Code and the regulations thereunder.      
    
     Upon a sale or exchange of its shares, a shareholder may realize a taxable
gain or loss depending upon its basis in the shares.  Such gain or loss will be
treated as capital gain or loss if the shares are capital assets in the
shareholder's hands.  Any such loss will be treated as long-term capital loss if
the shares were held for more than one year. In the case of an individual, any
such capital gain will be treated as short-term capital loss if the shares were
held for not more than 12 months; gain will be taxable at the maximum rate of
28% if such shares were held for more than 12, but not more than 18 months; and
gain will be taxable at the maximum rate of 20% if such shares were held for
more than 18 months. Legislature is pending which will, if enacted, reduce the
maximum capital gains rate in the case of an individual to 20% for shares held
for more than 12 months.  In the case of a corporation, any such capital gain
will be treated as long-term capital gain, taxable at the same rates as ordinary
income, if such shares were held for more than 12 months. The amount of any CDSC
will reduce the amount realized on the sale or exchange of shares for purposes
of determining gain or loss.  Generally, any loss realized on a sale or exchange
will be disallowed to the extent the shares disposed of are replaced (by
dividend reinvestments or otherwise) within a period of 61 days beginning 30
days before and ending 30 days after the shares are disposed of.  Any loss
realized by a shareholder on the sale of shares of a Fund held by the
shareholder for six months or less will be treated for tax purposes as a long-
term capital loss to the extent of any distributions of net capital gains
received by the shareholder with respect to such shares.      

                                      B-66
<PAGE>
 
     Under certain circumstances (such as the exercise of an exchange privilege
in certain cases), the tax effect of sales load charges imposed on the purchase
of shares in a regulated investment company is deferred if the shareholder does
not hold the shares for at least 90 days.

     Income received by a Fund from sources within foreign countries may be
subject to withholding and other taxes imposed by such countries.  Income tax
treaties between certain countries and the United States may reduce or eliminate
such taxes.  It is impossible to determine in advance the effective rate of
foreign tax to which a Fund will be subject, since the amount of that Fund's
assets to be invested in various countries is not known.  It is not anticipated
that any Fund will qualify to pass through to its shareholders the ability to
claim as a foreign tax credit their respective shares of foreign taxes paid by
such Fund.

     Under the Code, gains or losses attributable to fluctuations in exchange
rates which occur between the time a Fund accrues interest or other receivables
or accrues expenses or other liabilities denominated in a foreign currency and
the time such Fund actually collects such receivables or pays such liabilities
are treated as ordinary income or ordinary loss.  Similarly, gains or losses on
forward foreign currency exchange contracts, sales of currencies or dispositions
of debt securities denominated in a foreign currency attributable to
fluctuations in the value of the foreign currency between the date of
acquisition of the security and the date of disposition generally also are
treated as ordinary gain or loss.  These gains, referred to under the Code as
"Section 988" gains or losses, increase or decrease the amount of each Fund's
investment company taxable income available to be distributed to its
shareholders as ordinary income.

     The Code includes special rules applicable to the listed non-equity
options, regulated futures contracts, and options on futures contracts which a
Fund may write, purchase or sell.  Such options and contracts are classified as
Section 1256 contracts under the Code.  The character of gain or loss resulting
from the sale, disposition, closing out, expiration or other termination of
Section 1256 contracts, except forward foreign currency exchange contracts, is
generally treated as long-term capital gain or loss to the extent of 60% thereof
and short-term capital gain or loss to the extent of 40% thereof ("60/40 gain or
loss"). Such contracts, when held by a Fund at the end of a fiscal year,
generally are required to be treated as sold at market value on the last day of
such fiscal year for Federal income tax purposes ("marked-to-market"). Over-the-
counter options are not classified as Section 1256 contracts and are not subject
to the marked-to-market rule or to 60/40 gain or loss treatment.  Any gains or
losses recognized by a Fund from transactions in over-the-counter options
generally constitute short-term capital gains or losses.  When call options
written, or put options purchased, by a Fund are exercised, the gain or loss
realized on the sale of the underlying securities may be either short-term or
long-term, depending on the holding period of the securities.  In determining
the amount of gain or loss, the sales proceeds are reduced by the premium paid
for the over-the-counter puts or increased by the premium received for over-the-
counter calls.

     A substantial portion of each Fund's transactions in options, futures
contracts and options on futures contracts, particularly its hedging
transactions, may constitute "straddles" which are defined in the Code as
offsetting positions with respect to personal property.  A Straddle consisting
of a listed option, futures contract, or option on a futures contract and of
U.S. government securities would constitute a "mixed straddle" under the Code.
The Code generally provides with respect to straddles (i) "loss deferral" rules
which may postpone recognition for tax purposes of losses from certain closing
purchase transactions or other dispositions of a position in the straddle to the
extent of unrealized gains in the offsetting position, (ii) "wash sale" rules
which may postpone recognition for tax purposes of losses where a position is
sold and a new offsetting position is acquired within a prescribed period, (iii)
"short sale" rules which may terminate the holding period of securities owned by
a Fund when offsetting positions are established and which may convert certain
losses from short-term to long-term and (iv) "conversion transaction" rules
which may treat 

                                      B-67
<PAGE>
 
all or a portion of the gain on a transaction as ordinary income rather than as
capital gains. The Code provides that certain elections may be made for mixed
straddles that can alter the character of the capital gain or loss recognized
upon disposition of positions which form part of a straddle. Certain other
elections also are provided in the Code; no determination has been reached to
make any of these elections. Newly-enacted Code Section 1259 will require the
recognition of gain (but not loss) if a Fund makes a "constructive sale" of an
appreciated financial position (e.g., stock). A Fund generally will be
considered to make a constructive sale of an appreciated financial position if
it sells the same or substantially identical property short, enters into a
futures or forward contract to deliver the same or substantially identical
property, or enters into certain other similar transactions.

     The Government Securities Fund, Federal Securities Fund, Diversified Income
Fund, High Income Fund and Tax Exempt Insured Fund may purchase debt securities
(such as zero-coupon or pay-in-kind securities) that contain original issue
discount.  Original issue discount that accrues in a taxable year is treated as
earned by a Fund and therefore is subject to the distribution requirements of
the Code.  Because the original issue discount earned by the Fund in a taxable
year may not be represented by cash income, the Fund may have to dispose of
other securities and use the proceeds to make distributions to shareholders.

     With respect to the Tax Exempt Insured Fund, distributions out of net
investment income attributable to interest received on tax-exempt securities
("exempt-interest dividends") will be exempt from Federal income tax when paid
to shareholders.  It should be noted, however, that interest on certain "private
activity bonds" issued after August 7, 1986 is an item of tax preference for
purposes of the alternative minimum tax, and in any event all except interest
dividends whether or not treated as a tax preference,  must be taken into
account by corporate shareholders for purposes of determining the amount of the
adjustment to corporate alternative minimum taxable income based on adjusted
current earnings.  The Fund anticipates that a portion of its investment may be
made in such "private activity bonds" with the result that a portion of the
exempt-interest dividends paid by the Fund will be an item of tax preference to
shareholders subject to the alternative minimum tax.  Moreover, shareholders
should be aware that, while exempt from Federal income tax, exempt-interest
dividends may be taxable for state and local tax purposes.  Any loss realized by
a shareholder on the sale of shares of the Tax Exempt Insured Fund held by the
shareholder for six months or less will be disallowed to the extent of any
exempt-interest dividend received thereon. Moreover, a shareholder may not
deduct interest on indebtedness incurred or continued to purchase or carry
shares of the Tax Exempt Insured Fund to the extent that the Fund distributes
exempt-interest dividends to the shareholders during the taxable year.
    
     Legislation has expanded the market discount rules to apply to tax exempt
bonds purchased after April 30, 1993.  Therefore, any gain on the disposition of
such a bond (including the receipt of a partial principal payment) that was
acquired for a price less than the principal amount (or in the case of a bond
issued with original issue discount, the adjusted issue price at the time of
purchase) of the bond is treated as ordinary taxable income to the extent of the
required market discount.      

     A Fund may be required to backup withhold U.S. Federal income tax at the
rate of 31% of all taxable distributions payable to shareholders who fail to
provide their correct taxpayer identification number or fail to make required
certifications, or who have been notified by the Internal Revenue Service that
they are subject to backup withholding.  Backup withholding is not an additional
tax.  Any amounts withheld may be credited against a shareholder's U.S. Federal
income tax liability.

                                      B-68
<PAGE>
 
     Foreign shareholders generally will be subject to a withholding tax at the
rate of 30% (or lower treaty rate) on any ordinary income dividends paid by the
Funds.

     The foregoing is a general abbreviated summary of the applicable provisions
of the Code and Treasury regulations currently in effect.  Shareholders are
urged to consult their tax advisers regarding specific questions as to Federal,
state and local taxes.  In addition, foreign investors should consult with their
own tax advisers regarding the particular tax consequences to them of an
investment in each Fund. Qualification as a regulated investment company under
the Code for tax purposes does not entail government supervision of management
or investment policies.

                                RETIREMENT PLANS

     Shares of each Fund (other than the Tax Exempt Insured Fund) are eligible
to be purchased in conjunction with various types of qualified retirement plans.
The summary below is only a brief description of the Federal income tax laws for
each Plan and does not purport to be complete.  Further information or an
application to invest in shares of the Fund by establishing any of the
retirement plans described below may be obtained by calling Retirement Plans at
(800) 858-8850.  However, it  is recommended that a shareholder considering any
retirement plan consult a tax adviser before participating.

PENSION AND PROFIT-SHARING PLANS.  Sections 401(a) and 401(k) of the Code permit
business employers and certain associations to establish pension and profit
sharing plans for employees.  Shares of the Fund may be purchased by those who
would have been covered under the rules governing old H.R. 10 (Keogh) Plans, as
well as by corporate plans.  Each business retirement plan provides tax
advantages for owners and participants.  Contributions made by the employer are
tax-deductible, and participants do not pay taxes on contributions or earnings
until withdrawn.

TAX-SHELTERED CUSTODIAL ACCOUNTS.  Section 403(b)(7) of the Code permits public
school employees and employees of certain types of charitable, educational and
scientific organizations specified in Section 501(c)(3) of the Code, to purchase
shares of the Fund and, subject to certain limitations, exclude the amount of
purchase payments from gross income for tax purposes.
    
INDIVIDUAL RETIREMENT ACCOUNTS (IRA).  Section 408 of the Code permits eligible
individuals to contribute to an individual retirement program, including
Simplified Employee Pension Plans, commonly referred to as SEP-IRA. Section 408A
of the Code treats Roth IRA's as IRA's subject to certain special rules
applicable thereto. These IRA's are subject to limitations with respect to the
amount that may be contributed, the eligibility of individuals to make
contributions, the amount, if any, entitled to be contributed on a deductible
basis, and the time in which distributions would be allowed to commence.  In
addition, certain distributions from some other types of retirement plans may be
placed on a tax-deferred basis in an IRA.      

SALARY REDUCTION SIMPLIFIED EMPLOYEE PENSION (SARSEP).  This plan was introduced
by a provision of the Tax Reform Act of 1986 as a unique way for small employers
to provide the benefit of retirement planning for their employees.
Contributions are deducted from the employee's paycheck before tax deductions
and are deposited into an IRA by the employer.  These contributions are not
included in the employee's income and therefore are not reported or deducted on
his or her tax return.

                                      B-69
<PAGE>
 
SAVINGS INCENTIVE MATCH PLAN FOR EMPLOYEES ("SIMPLE IRA").  This plan was
introduced by a provision of the Small Business Job Protection Act of 1996 to
provide small employers with a simplified tax-favored retirement plan.
Contributions are deducted from the employee's paycheck before taxes and are
deposited into a SIMPLE IRA by the employer, who must make either matching
contributions or non-elective contributions.  Contributions are tax-deductible
for the employer and participants do not pay taxes on contributions on earnings
until they are withdrawn.

ROTH IRA.  This plan, introduced by Section 302 of the Taxpayer Relief Act of
1997, generally permits individuals with adjusted gross income of up to $95,000,
and married couples with joint adjusted gross income of up to $150,000, to
contribute to a "Roth IRA."  Contributions are not tax-deductible, but
distribution of assets (contributions and earnings) held in the account for at
least five years may be distributed tax-free under certain qualifying
conditions.

EDUCATION IRA.  Established by the Taxpayer Relief Act of 1997, under Section
530 of the Code, this plan permits individuals to contribute to an IRA on behalf
of any child under the age of 18.  Contributions are not tax-deductible but
distributions are tax-free if used for qualified educational expenses.

                             DESCRIPTION OF SHARES

     Ownership of the Trust is represented by transferable shares of beneficial
interest.  The Declaration of Trust of the Trust (the "Declaration of Trust")
permits the Trustees to issue an unlimited number of full and fractional shares,
$.01 par value, and to divide or combine the shares into a greater or lesser
number of shares without thereby changing the proportionate beneficial interests
of the Trust.

     Currently, five series of shares of the Trust have been authorized pursuant
to the Declaration of Trust:  the Government Securities Fund, the Federal
Securities Fund, the Diversified Income Fund, the High Income Fund and the Tax
Exempt Insured Fund.  Except for the High Income Fund, each series has been
divided into two classes of shares, designated as Class A and Class B shares.
The High Income Fund series has been divided into three classes of shares,
designated as Class A, Class B and Class C shares.  The Trustees may authorize
the creation of additional series of shares so as to be able to offer to
investors additional investment portfolios within the Trust that would operate
independently from the Trust's present portfolios, or to distinguish among
shareholders, as may be necessary, to comply with future regulations or other
unforeseen circumstances.  Each series of the Trust's shares represents the
interests of the shareholders of that series in a particular portfolio of Trust
assets.  In addition, the Trustees may authorize the creation of additional
classes of shares in the future, which may have fee structures different from
those of existing classes and/or may be offered only to certain qualified
investors.

     Shareholders are entitled to a full vote for each full share held.  The
Trustees have terms of unlimited duration (subject to certain removal
procedures) and have the power to alter the number of Trustees and appoint their
own successors, provided that at all times at least a majority of the Trustees
have been elected by shareholders.  The voting rights of shareholders are not
cumulative, so that holders of more than 50% of the shares voting can, if they
choose, elect all Trustees being elected, while the holders of the remaining
shares would be unable to elect any Trustees.  Although the Trust need not hold
annual meetings of shareholders, the Trustees may call special meetings of
shareholders for action by shareholder vote as may be required by the 1940 Act
or the Declaration of Trust.  Also, a shareholders meeting must be called, if so
requested in writing by the holders of record of 10% or more of the outstanding
shares of the Trust.  In addition, the Trustees may be removed by the action of
the holders of record of two-thirds or more of the outstanding shares.  All
series of shares will vote with respect to certain matters, such as election of

                                      B-70
<PAGE>
 
Trustees.  When all series of shares are not affected by a matter to be voted
upon, such as approval of investment advisory agreements or changes in a Fund's
policies, only shareholders of the series affected by the matter may be entitled
to vote.

     All classes of shares of a given series are identical in all respects,
except that (i) each class may bear differing amounts of certain class-specific
expenses, (ii) Class A shares are subject to an initial sales charge, a
distribution fee and an ongoing account maintenance and service fee, (iii) Class
B and Class C shares are each subject to a CDSC, a distribution fee and an
ongoing account maintenance and service fee, (iv) Class B shares convert
automatically to Class A shares on the first business day of the month seven
years after the purchase of such Class B Shares, (v) each class has voting
rights on matters that pertain to the Rule 12b-1 plan adopted with respect to
such class, except that under certain circumstances, the holders of the Class B
shares may be entitled to vote on material changes to the Class A Rule 12b-1
plan, and (vi) each class of shares will be exchangeable only into the same
class of shares of any other Fund or other funds in the SunAmerica Family of
Mutual Funds that offers that class.  All shares of the Trust issued and
outstanding and all shares offered by the Prospectus when issued, are and will
be fully paid and non-assessable.  Shares have no preemptive or other
subscription rights and are freely transferable on the books of the Trust.  In
addition, shares have no conversion rights, except as described above.

     The Declaration of Trust provides that no Trustee, officer, employee or
agent of the Trust is liable to the Trust or to a shareholder, nor is any
Trustee, officer, employee or agent liable to any third persons in connection
with the affairs of the Trust, except as such liability may arise from his or
its own bad faith, willful misfeasance, gross negligence or reckless disregard
of his duties.  It also provides that all third persons shall look solely to the
Trust's property for satisfaction of claims arising in connection with the
affairs of the Trust.  With the exceptions stated, the Declaration of Trust
provides that a Trustee, officer, employee or agent is entitled to be
indemnified against all liability in connection with the affairs of the Trust.
The Trust shall continue, without limitation of time, subject to the provisions
in the Declaration of Trust concerning termination by action of the
shareholders.

                                      B-71
<PAGE>
 
                             ADDITIONAL INFORMATION
                                        
Computation of Offering Price per Share
- ---------------------------------------
    
     The offering price for Class A, Class B and Class C shares of the Funds,
based on the value of each Fund's net assets as of March 31, 1998, is calculated
as follows:      



[This area intentionally left blank.]

                                      B-72
<PAGE>
 
<TABLE>    
<CAPTION>      
                          -----------------------------------------------------------------------------------------
                          Government Securities        Federal Securities          Diversified Income
- -------------------------------------------------------------------------------------------------------------------
                          Class A       Class B        Class A       Class B       Class A          Class B
- -------------------------------------------------------------------------------------------------------------------
<S>                       <C>           <C>            <C>           <C>           <C>           <C>
Net Assets                $97,495,609   $207,950,333   $31,627,516   $18,836,682   $25,516,573          $63,397,420
- ------------------------------------------------------------------------------------------------------------------- 
Number  of  Shares         11,259,592     24,004,195     2,868,465     1,703,670     5,449,294           13,507,605
Outstanding
- ------------------------------------------------------------------------------------------------------------------- 
Net Asset Value           $      8.66   $       8.66   $     11.03   $     11.06   $      4.68          $      4.69
(net assets divided
by number  of
shares)
- ------------------------------------------------------------------------------------------------------------------- 
Sales Charge (for
Class A Shares:
4.75% of offering         $      0.43        **        $      0.55         **      $      0.23                **
price (6.10% of net
asset value per
share))*
- ------------------------------------------------------------------------------------------------------------------- 
Offering Price            $      9.09   $       8.66   $     11.58         11.06   $      4.91          $      4.69
- -------------------------------------------------------------------------------------------------------------------
</TABLE>      

<TABLE>    
<CAPTION>
                          -------------------------------------------------------------------
                          High Income   Tax Exempt Insured
- ---------------------------------------------------------------------------------------------
                          Class A       Class B       Class C       Class A       Class B
- ---------------------------------------------------------------------------------------------
<S>                       <C>           <C>            <C>          <C>           <C>
Net Assets                $56,442,305   $124,962,181   $1,145,865   $88,518,909   $22,877,700
- --------------------------------------------------------------------------------------------- 
Number of Shares            7,250,438     16,031,814      147,022     6,791,093     1,754,749
Outstanding
- --------------------------------------------------------------------------------------------- 
Net Asset Value           $      7.78   $       7.79   $     7.79   $     13.03   $     13.04
(net assets divided
by number of
shares)
- --------------------------------------------------------------------------------------------- 
Sales Charge (for
Class A Shares:           $      0.39           **           **     $      0.65         **
4.75% of offering
price (6.10% of net
asset value per
share)*
- --------------------------------------------------------------------------------------------- 
Offering Price            $      8.17   $       7.79   $     7.79   $     13.68   $     13.04
- ---------------------------------------------------------------------------------------------
</TABLE>     
    
     *      Rounded to nearest one-hundredth percent; assumes maximum sales
            charge is applicable.
     **     Class B and Class C shares are not subject to an initial sales
            charge but may be subject to a CDSC on redemption of shares within
            six years of purchase.      

REPORTS TO SHAREHOLDERS.  The Trust sends audited annual and unaudited semi-
annual reports to shareholders of each of the Funds.  In addition, the Transfer
Agent sends a statement to each shareholder having an account directly with the
Trust to confirm transactions in the account.

                                      B-73
<PAGE>
 
    
CUSTODIAN AND TRANSFER AGENT. State Street Bank and Trust Company, 1776 Heritage
Drive, North Quincy, MA 02171, serves as Custodian and Transfer Agent for the
Funds and in those capacities maintains certain financial and accounting books
and records pursuant to agreements with the Trust. Transfer Agent functions are
performed for State Street, by National Financial Data Services, P.O. Box
419572, Kansas City, MO 64141-6572, an affiliate of State Street. SunAmerica
Fund Services, Inc., The SunAmerica Center, 733 Third Avenue, New York, NY 
10017-3204, acts as a servicing agent assisting State Street Bank and Trust
Company in connection with certain services offered to the shareholders of each
of the Funds.     
    
INDEPENDENT ACCOUNTANTS AND LEGAL COUNSEL. Pricewaterhouse Coopers LLP
(successor firm to Price Waterhouse LLP), 1177 Avenue of the Americas, New York,
NY 10036, serves as the Trust's independent accountants and in that capacity
examines the annual financial statements of the Trust. The firm of Shereff,
Friedman, Hoffman & Goodman, LLP, 919 Third Avenue, New York, NY 10022, serves
as legal counsel to the Trust.     
    
                              FINANCIAL STATEMENTS      
    
     Set forth following this Statement of Additional Information are the
Trust's financial statements for the fiscal year ended March 31, 1998.      

                                      B-74

<PAGE>
 
 SUNAMERICA INCOME FUNDS
 STATEMENT OF ASSETS AND LIABILITIES -- March 31, 1998
 
<TABLE>
<CAPTION>
                          U.S. GOVERNMENT     FEDERAL     DIVERSIFIED       HIGH       TAX EXEMPT
                          SECURITIES FUND SECURITIES FUND INCOME FUND   INCOME FUND   INSURED FUND
                          ------------------------------------------------------------------------
<S>                       <C>             <C>             <C>           <C>           <C>
ASSETS:
Investment securities,
 at value (identified
 cost $302,111,257;
 $43,785,438;
 $81,841,431;
 $181,853,876 and
 $100,416,712,
 respectively)..........   $305,882,429     $44,635,181   $ 83,653,354  $181,939,792  $109,129,854
Short-term securities,
 at value (identified
 cost $493,605; 0;
 $1,051,250; $1,576,875
 and $700,000,
 respectively)..........        493,611              --      1,030,000     1,545,000       700,000
Repurchase agreements
 (cost equals market)...     27,473,000       9,030,000      1,722,000            --            --
Cash....................          1,230             351        448,692       812,672        71,604
Receivable for
 investments sold.......     37,637,824       2,623,576      1,490,055     2,584,155       185,078
Interest and dividends
 receivable.............      3,104,846         382,104      1,762,511     3,510,561     1,627,566
Receivable for variation
 margin on futures
 contracts..............         66,344              --             --            --            --
Receivable for shares of
 beneficial interest
 sold...................         49,859         137,221         35,246     1,829,350        69,177
Prepaid expenses........         31,274          28,285          3,991        29,472        20,847
Receivable due from
 investment adviser.....             --              --             --         2,995            --
                           ------------     -----------   ------------  ------------  ------------
 Total assets...........    374,740,417      56,836,718     90,145,849   192,253,997   111,804,126
                           ------------     -----------   ------------  ------------  ------------
LIABILITIES:
Payable for investments
 purchased..............     43,845,473       6,108,317        623,618     8,656,239            --
Payable for securities
 loaned.................     23,543,750              --             --            --            --
Dividends payable.......        599,805          95,055        290,956       634,016       179,988
Payable for shares of
 beneficial interest
 redeemed...............        490,916          58,761        125,416        71,279        47,148
Accrued expenses........        407,803          62,674         81,087       110,054        87,161
Distribution and service
 maintenance fees
 payable................        209,885          25,299         61,603       119,681        45,821
Investment advisory and
 management fees
 payable................        196,843          22,414         49,176       112,377        47,399
                           ------------     -----------   ------------  ------------  ------------
 Total liabilities......     69,294,475       6,372,520      1,231,856     9,703,646       407,517
                           ------------     -----------   ------------  ------------  ------------
   Net assets...........   $305,445,942     $50,464,198   $ 88,913,993  $182,550,351  $111,396,609
                           ============     ===========   ============  ============  ============
NET ASSETS WERE COMPOSED
 OF:
Shares of beneficial
 interest, $.01 par
 value..................   $    352,638     $    45,721   $    189,569  $    234,293  $     85,458
Paid-in capital.........    331,443,039      48,864,044    111,458,940   204,731,580   106,047,602
                           ------------     -----------   ------------  ------------  ------------
                            331,795,677      48,909,765    111,648,509   204,965,873   106,133,060
Accumulated
 undistributed
 (distributions in
 excess of) net
 investment income......        (60,738)        (75,487)       191,746       439,881      (110,607)
Accumulated net realized
 gain (loss) on
 investments, futures,
 options and foreign
 currency...............    (30,136,632)        780,177    (24,716,935)  (22,909,444)   (3,338,986)
Net unrealized
 appreciation on
 investments............      3,771,178         849,743      1,790,673        54,041     8,713,142
Net unrealized
 appreciation on futures
 contracts..............         76,457              --             --            --            --
                           ------------     -----------   ------------  ------------  ------------
   Net assets...........   $305,445,942     $50,464,198   $ 88,913,993  $182,550,351  $111,396,609
                           ============     ===========   ============  ============  ============
CLASS A (UNLIMITED
 SHARES AUTHORIZED):
 Net assets.............   $ 97,495,609     $31,627,516   $ 25,516,573  $ 56,442,305  $ 88,518,909
 Shares of beneficial
  interest issued and
  outstanding...........     11,259,592       2,868,465      5,449,294     7,250,438     6,791,093
 Net asset value and
  redemption price per
  share.................   $       8.66     $     11.03   $       4.68  $       7.78  $      13.03
 Maximum sales charge
  (4.75% of offering
  price)................           0.43            0.55           0.23          0.39          0.65
                           ------------     -----------   ------------  ------------  ------------
 Maximum offering price
  to public.............   $       9.09     $     11.58   $       4.91  $       8.17  $      13.68
                           ============     ===========   ============  ============  ============
CLASS B (UNLIMITED
 SHARES AUTHORIZED):
 Net assets.............   $207,950,333     $18,836,682   $ 63,397,420  $124,962,181  $ 22,877,700
 Shares of beneficial
  interest issued and
  outstanding...........     24,004,195       1,703,670     13,507,605    16,031,814     1,754,749
 Net asset value,
  offering and
  redemption price per
  share.................   $       8.66     $     11.06   $       4.69  $       7.79  $      13.04
                           ============     ===========   ============  ============  ============
CLASS C (UNLIMITED
 SHARES AUTHORIZED):
 Net assets.............                                                $  1,145,865
 Shares of beneficial
  interest issued and
  outstanding...........                                                     147,022
 Net asset value,
  offering and
  redemption price per
  share.................                                                $       7.79
                                                                        ============
</TABLE>
See Notes to Financial Statements
 
                                       5
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 STATEMENT OF OPERATIONS -- For the year ended March 31, 1998
 
<TABLE>
<CAPTION>
                            U.S. GOVERNMENT     FEDERAL     DIVERSIFIED     HIGH       TAX EXEMPT
                            SECURITIES FUND SECURITIES FUND INCOME FUND  INCOME FUND  INSURED FUND
                            --------------- --------------- -----------  -----------  ------------
<S>                         <C>             <C>             <C>          <C>          <C>
INVESTMENT INCOME:
Income:
 Interest.................    $29,715,115     $3,563,623    $ 9,902,668  $15,827,269  $ 6,714,012
 Dividends................             --             --             --      193,979           --
                              -----------     ----------    -----------  -----------  -----------
 Total Investment Income..     29,715,115      3,563,623      9,902,668   16,021,248    6,714,012
                              -----------     ----------    -----------  -----------  -----------
Expenses:
 Investment advisory and
  management fees.........      2,618,884        259,246        630,297    1,128,548      582,729
 Distribution and service
  maintenance fees--Class
  A.......................        374,850        108,151         82,072      161,715      324,213
 Distribution and service
  maintenance fees--Class
  B.......................      2,483,056        184,550        735,197    1,041,969      239,135
 Distribution and service
  maintenance fees--Class
  C.......................             --             --             --          719           --
 Custodian fees and
  expenses................        788,005         90,080         66,300       89,190       76,980
 Transfer agent fees and
  expenses--Class A.......        290,141         91,849         68,239      131,360      242,205
 Transfer agent fees and
  expenses--Class B.......        637,618         54,847        196,384      268,421       59,414
 Transfer agent fees and
  expenses--Class C.......             --             --             --          251           --
 Trustees' fees and
  expenses................         44,736          5,487         11,868       17,130       13,971
 Audit and tax consulting
  fees....................         28,830         24,725         25,035       26,545       24,455
 Printing expense.........         24,970          5,980          7,065       11,975        5,075
 Registration fees--Class
  A.......................         10,489         11,023          8,310       13,357       13,056
 Registration fees--Class
  B.......................         13,247          9,289         12,622       17,764        8,449
 Registration fees--Class
  C.......................             --             --             --        3,799           --
 Legal fees and expenses..          8,300            526          1,610        1,820        1,760
 Insurance expense........          6,524            768          1,582        2,051       12,855
 Interest expense.........          4,020             --          3,481        9,691           --
 Miscellaneous expenses...          6,755            822          1,656        2,251        1,998
                              -----------     ----------    -----------  -----------  -----------
 Total expenses...........      7,340,425        847,343      1,851,718    2,928,556    1,606,295
 Less: expenses
  reimbursed by
  investment adviser......             --             --             --       (3,859)          --
                              -----------     ----------    -----------  -----------  -----------
 Net expenses.............      7,340,425        847,343      1,851,718    2,924,697    1,606,295
                              -----------     ----------    -----------  -----------  -----------
Net investment income.....     22,374,690      2,716,280      8,050,950   13,096,551    5,107,717
                              -----------     ----------    -----------  -----------  -----------
REALIZED AND UNREALIZED
 GAIN (LOSS) ON
 INVESTMENTS:
Net realized gain on
 investments..............      3,606,429      1,918,591      5,155,099   11,231,344    3,219,309
Net realized foreign
 exchange loss on other
 assets and liabilities...             --             --         (4,627)      (2,086)          --
Net realized loss on
 future contracts.........             --             --             --           --      (10,563)
Net change in unrealized
 appreciation/depreciation
 on investments...........      5,602,705        928,406        783,223    2,889,820    3,147,644
Net change in unrealized
 appreciation/depreciation
 on futures contracts.....         76,457             --             --           --           --
                              -----------     ----------    -----------  -----------  -----------
Net realized and
 unrealized gain on
 investments..............      9,285,591      2,846,997      5,933,695   14,119,078    6,356,390
                              -----------     ----------    -----------  -----------  -----------
NET INCREASE IN NET ASSETS
 RESULTING FROM
 OPERATIONS...............    $31,660,281     $5,563,277    $13,984,645  $27,215,629  $11,464,107
                              ===========     ==========    ===========  ===========  ===========
</TABLE>
 
See Notes to Financial Statements
 
                                       6
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                          U.S. GOVERNMENT SECURITIES FUND    FEDERAL SECURITIES FUND     DIVERSIFIED INCOME FUND
                          -------------------------------   --------------------------  --------------------------
                           FOR THE YEAR     FOR THE YEAR    FOR THE YEAR  FOR THE YEAR  FOR THE YEAR  FOR THE YEAR
                               ENDED            ENDED          ENDED         ENDED         ENDED         ENDED
                             MARCH 31,        MARCH 31,      MARCH 31,     MARCH 31,     MARCH 31,     MARCH 31,
                               1998             1997            1998          1997          1998          1997
                          ---------------  ---------------  ------------  ------------  ------------  ------------
<S>                       <C>              <C>              <C>           <C>           <C>           <C>           <C>
INCREASE (DECREASE) IN
 NET ASSETS:
OPERATIONS:
 Net investment income..  $    22,374,690  $    31,171,251  $ 2,716,280   $  3,342,605  $  8,050,950  $  9,277,031
 Net realized gain
  (loss) on investments.        3,606,429      (13,021,676)   1,918,591       (270,175)    5,155,099     3,537,013
 Net realized gain
  (loss) on futures and
  options contracts.....               --          (68,606)          --         19,076            --       (19,031)
 Net realized foreign
  exchange loss on other
  assets and
  liabilities...........               --               --           --             --        (4,627)       (1,754)
 Net change in
  unrealized
  appreciation/
  depreciation on
  investments...........        5,602,705       (1,446,259)     928,406       (165,240)      783,223      (866,163)
 Net change in
  unrealized
  appreciation/
  depreciation on
  futures contracts.....           76,457               --           --             --            --            15
                          ---------------  ---------------  -----------   ------------  ------------  ------------
Net increase in net
 assets resulting from
 operations.............       31,660,281       16,634,710    5,563,277      2,926,266    13,984,645    11,927,111
                          ---------------  ---------------  -----------   ------------  ------------  ------------
DIVIDENDS AND
 DISTRIBUTIONS TO
 SHAREHOLDERS:
 From net investment
  income (Class A)......       (5,951,438)      (6,332,560)  (1,684,720)    (1,939,301)   (1,963,415)   (1,544,886)
 From net investment
  income (Class B)......      (12,224,144)     (18,378,969)    (886,109)    (1,107,790)   (5,673,779)   (7,502,127)
 From net realized gain
  on investments
  (Class A).............               --               --      (51,944)            --            --            --
 From net realized gain
  on investments
  (Class B).............               --               --      (30,053)            --            --            --
                          ---------------  ---------------  -----------   ------------  ------------  ------------
 Total dividends and
  distributions to
  shareholders..........      (18,175,582)     (24,711,529)  (2,652,826)    (3,047,091)   (7,637,194)   (9,047,013)
                          ---------------  ---------------  -----------   ------------  ------------  ------------
NET DECREASE IN NET
 ASSETS RESULTING FROM
 CAPITAL SHARE
 TRANSACTIONS (NOTE 6)..     (110,250,060)    (143,987,563)  (1,884,623)   (16,883,153)  (18,116,083)  (29,908,684)
                          ---------------  ---------------  -----------   ------------  ------------  ------------
TOTAL INCREASE
 (DECREASE) IN NET
 ASSETS.................      (96,765,361)    (152,064,382)   1,025,828    (17,003,978)  (11,768,632)  (27,028,586)
NET ASSETS:
Beginning of period.....      402,211,303      554,275,685   49,438,370     66,442,348   100,682,625   127,711,211
                          ---------------  ---------------  -----------   ------------  ------------  ------------
End of period [including
 undistributed
 (distributions in
 excess of) net
 investment income for
 March 31,1998 and March
 31, 1997 of $(60,738),
 $(318,396), $(75,487),
 $(82,950), $191,746 and
 $(217,383),
 respectively]..........  $   305,445,942  $   402,211,303  $50,464,198   $ 49,438,370  $ 88,913,993  $100,682,625
                          ===============  ===============  ===========   ============  ============  ============
</TABLE>
 
See Notes to Financial Statements
 
                                       7
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                HIGH INCOME FUND         TAX EXEMPT INSURED FUND
                            --------------------------  --------------------------
                            FOR THE YEAR  FOR THE YEAR  FOR THE YEAR  FOR THE YEAR
                               ENDED         ENDED         ENDED         ENDED
                             MARCH 31,     MARCH 31,     MARCH 31,     MARCH 31,
                                1998          1997          1998          1997
                            ------------  ------------  ------------  ------------
<S>                         <C>           <C>           <C>           <C>
INCREASE (DECREASE) IN NET
 ASSETS:
OPERATIONS:
 Net investment income....  $ 13,096,551  $ 12,780,101  $  5,107,717  $  6,361,674
 Net realized gain on
  investments.............    11,231,344     8,745,205     3,219,309     2,352,893
 Net realized foreign
  exchange gain (loss) on
  other assets and
  liabilities.............        (2,086)           --            --        15,222
 Net realized loss on
  futures contracts.......            --            --       (10,563)           --
 Net change in unrealized
  appreciation/depreciation
  on investments..........     2,889,820    (6,210,119)    3,147,644    (3,258,254)
                            ------------  ------------  ------------  ------------
Net increase in net assets
 resulting from
 operations...............    27,215,629    15,315,187    11,464,107     5,471,535
                            ------------  ------------  ------------  ------------
DIVIDENDS TO SHAREHOLDERS:
 From net investment
  income (Class A)........    (4,011,096)   (3,645,653)   (4,101,670)   (5,107,379)
 From net investment
  income (Class B)........    (8,387,799)   (9,395,202)     (903,110)   (1,167,279)
 From net investment
  income (Class C)........        (6,158)           --            --            --
                            ------------  ------------  ------------  ------------
Total dividends to
 shareholders.............   (12,405,053)  (13,040,855)   (5,004,780)   (6,274,658)
                            ------------  ------------  ------------  ------------
NET INCREASE (DECREASE) IN
 NET ASSETS RESULTING FROM
 CAPITAL SHARE
 TRANSACTIONS (NOTE 6)....    28,217,413     9,485,027   (18,491,567)  (27,040,178)
                            ------------  ------------  ------------  ------------
TOTAL INCREASE (DECREASE)
 IN NET ASSETS............    43,027,989    11,759,359   (12,032,240)  (27,843,301)
NET ASSETS:
Beginning of period.......   139,522,362   127,763,003   123,428,849   151,272,150
                            ------------  ------------  ------------  ------------
End of period [including
 undistributed
 (distributions in excess
 of) net investment income
 for March 31,1998 and
 March 31, 1997 of
 $439,881, $(267,317),
 $(110,607) and
 $(213,544),
 respectively]............  $182,550,351  $139,522,362  $111,396,609  $123,428,849
                            ============  ============  ============  ============
</TABLE>
 
See Notes to Financial Statements
 
                                       8
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 FINANCIAL HIGHLIGHTS
 
<TABLE>
<CAPTION>
U.S. GOVERNMENT SECURITIES FUND
- -------------------------------
                                          NET
                                         GAIN
                                        (LOSS)
                                          ON                                     DISTRI-
                                        INVEST-                                  BUTIONS
                                         MENTS      TOTAL    DIVIDENDS          IN EXCESS           NET               NET
                 NET ASSET               (BOTH       FROM    FROM NET            OF NET            ASSET             ASSETS
                  VALUE,      NET      REALIZED    INVEST-    INVEST-  RETURN    INVEST-   TOTAL   VALUE,            END OF
     PERIOD      BEGINNING INVESTMENT     AND        MENT      MENT      OF       MENT    DISTRI-  END OF   TOTAL    PERIOD
     ENDED       OF PERIOD INCOME(1)  UNREALIZED) OPERATIONS  INCOME   CAPITAL   INCOME   BUTIONS  PERIOD RETURN(2) (000'S)
- ---------------- --------- ---------- ----------- ---------- --------- -------  --------- -------  ------ --------- --------
<S>              <C>       <C>        <C>         <C>        <C>       <C>      <C>       <C>      <C>    <C>       <C>
                                                                       CLASS A
                                                                       -------
10/01/93-
 3/31/94(3).....   $8.68     $0.28      $(0.34)     $(0.06)   $(0.14)  $(0.01)   $(0.08)  $(0.23)  $8.39    (0.68)% $ 76,586
3/31/95.........    8.39      0.61       (0.30)       0.31     (0.47)      --        --    (0.47)   8.23     3.89     73,399
3/31/96.........    8.23      0.62        0.16        0.78     (0.51)      --        --    (0.51)   8.50     9.62    125,504
3/31/97.........    8.50      0.59       (0.26)       0.33     (0.48)      --        --    (0.48)   8.35     3.98    113,171
3/31/98.........    8.35      0.58        0.21        0.79     (0.48)      --        --    (0.48)   8.66     9.62     97,496
                                                                       CLASS B
                                                                       -------
7/01/93-
 3/31/94(5).....   $8.74     $0.43      $(0.40)      $0.03    $(0.24)  $(0.01)   $(0.13)  $(0.38)  $8.39     0.25%  $886,089
3/31/95.........    8.39      0.56       (0.30)       0.26     (0.41)      --        --    (0.41)   8.24     3.25    594,779
3/31/96.........    8.24      0.55        0.17        0.72     (0.45)      --        --    (0.45)   8.51     8.87    428,772
3/31/97.........    8.51      0.54       (0.26)       0.28     (0.43)      --        --    (0.43)   8.36     3.31    289,040
3/31/98.........    8.36      0.52        0.20        0.72     (0.42)      --        --    (0.42)   8.66     8.80    207,950
<CAPTION>
U.S. GOVERNMENT SECURITIES FUND
- -------------------------------
                 RATIO OF       RATIO OF
                 EXPENSES         NET
                    TO         INVESTMENT
                 AVERAGE       INCOME TO
     PERIOD        NET          AVERAGE       PORTFOLIO
     ENDED        ASSETS       NET ASSETS     TURNOVER
- ---------------- ------------- -------------- ---------
<S>              <C>           <C>            <C>
10/01/93-
 3/31/94(3).....   1.35%(4)(6)    6.83%(4)(6)     35%
3/31/95.........   1.46(6)        7.50(6)        105
3/31/96.........   1.44(6)        7.11(6)        142
3/31/97.........   1.54(6)        7.01(6)        148
3/31/98.........   1.63           6.73           229
7/01/93-
 3/31/94(5).....   1.95%(4)(6)    6.61%(4)(6)     35%
3/31/95.........   2.15(6)        6.80(6)        105
3/31/96.........   2.13           6.46           142
3/31/97.........   2.18           6.36           148
3/31/98.........   2.26           6.11           229
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
FEDERAL SECURITIES FUND
- -----------------------
                                          NET
                                         GAIN
                                        (LOSS)
                                          ON                                         DISTRI-
                                        INVEST-                                      BUTIONS
                                         MENTS      TOTAL    DIVIDENDS DISTRI-      IN EXCESS           NET               NET
                 NET ASSET               (BOTH       FROM    FROM NET  BUTIONS       OF NET            ASSET            ASSETS
                  VALUE,      NET      REALIZED    INVEST-    INVEST-   FROM         INVEST-   TOTAL   VALUE,           END OF
     PERIOD      BEGINNING INVESTMENT     AND        MENT      MENT    CAPITAL        MENT    DISTRI-  END OF   TOTAL   PERIOD
     ENDED       OF PERIOD INCOME(1)  UNREALIZED) OPERATIONS  INCOME    GAINS        INCOME   BUTIONS  PERIOD RETURN(2) (000'S)
- ---------------- --------- ---------- ----------- ---------- --------- -------  --- --------- -------  ------ --------- -------
<S>              <C>       <C>        <C>         <C>        <C>       <C>      <C> <C>       <C>      <C>    <C>       <C>
                                                                              CLASS A
                                                                              -------
10/11/93-
 3/31/94(3).....  $10.58     $0.22      $(0.34)     $(0.12)   $(0.23)  $(0.01)       $   --   $(0.24)  $10.22   (1.14)% $   592
3/31/95.........   10.22      0.60       (0.20)       0.40     (0.64)      --            --    (0.64)    9.98    4.18     6,259
3/31/96.........    9.98      0.68        0.40        1.08     (0.63)      --            --    (0.63)   10.43   10.94    40,278
3/31/97.........   10.43      0.65       (0.10)       0.55     (0.59)      --            --    (0.59)   10.39    5.40    30,509
3/31/98.........   10.39      0.62        0.63        1.25     (0.59)   (0.02)           --    (0.61)   11.03   12.29    31,628
                                                                              CLASS B
                                                                              -------
3/31/94.........  $10.84     $0.62      $(0.71)     $(0.09)   $(0.49)  $(0.03)       $(0.01)  $(0.53)  $10.22   (0.89)% $81,011
3/31/95.........   10.22      0.63       (0.26)       0.37     (0.58)      --            --    (0.58)   10.01    3.81    65,631
3/31/96.........   10.01      0.56        0.44        1.00     (0.56)      --            --    (0.56)   10.45   10.13    26,165
3/31/97.........   10.45      0.57       (0.08)       0.49     (0.52)      --            --    (0.52)   10.42    4.82    18,929
3/31/98.........   10.42      0.55        0.63        1.18     (0.52)   (0.02)           --    (0.54)   11.06   11.54    18,837
<CAPTION>
FEDERAL SECURITIES FUND
- -----------------------
                 RATIO OF       RATIO OF
                 EXPENSES         NET
                    TO         INVESTMENT
                 AVERAGE       INCOME TO
     PERIOD        NET          AVERAGE       PORTFOLIO
     ENDED        ASSETS       NET ASSETS     TURNOVER
- ---------------- ------------- -------------- ---------
<S>              <C>           <C>            <C>
10/11/93-
 3/31/94(3).....   1.39%(4)(6)    4.68%(4)(6)     68%
3/31/95.........   1.40(6)        6.90(6)        267
3/31/96.........   1.37           6.12           311
3/31/97.........   1.41           6.11           426
3/31/98.........   1.47           5.75           529
3/31/94.........   1.98%          5.79%           68%
3/31/95.........   2.03           6.33           267
3/31/96.........   2.01           5.64           311
3/31/97.........   2.07           5.46           426
3/31/98.........   2.13           5.09           529
</TABLE>
- ------------
(1) Calculated based upon average shares outstanding
(2) Total return is not annualized and does not reflect sales load
(3) Commencement of sale of respective class of shares
(4) Annualized
(5) Pursuant to a reorganization of the SunAmerica Mutual Funds, the Fund
    changed its fiscal year end to March 31
(6) Net of the following expense reimbursements (based on average net assets):
 
<TABLE>
<CAPTION>
                                            3/31/94 3/31/95 3/31/96 3/31/97
                                            ------- ------- ------- -------
   <S>                                      <C>     <C>     <C>     <C>
   U.S. Government Securities Fund Class A    .10%    .07%   .04%     .01%
   U.S. Government Securities Fund Class B    .06%    .03%     --        --
   Federal Securities Fund Class A           6.74%   1.26%     --        --
</TABLE>
 
See Notes to Financial Statements
 
                                       9
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 FINANCIAL HIGHLIGHTS
 
<TABLE>
<CAPTION>
DIVERSIFIED INCOME FUND
- -----------------------
                                       NET GAIN
                                       (LOSS) ON                                                  RATIO OF
                                      INVESTMENTS                        NET               NET    EXPENSES      RATIO OF NET
                 NET ASSET               (BOTH               DIVIDENDS  ASSET             ASSETS     TO          INVESTMENT
                  VALUE,      NET      REALIZED   TOTAL FROM  FROM NET  VALUE,            END OF  AVERAGE        INCOME TO
                 BEGINNING INVESTMENT     AND     INVESTMENT INVESTMENT END OF   TOTAL    PERIOD    NET         AVERAGE NET
  PERIOD ENDED   OF PERIOD INCOME(1)  UNREALIZED) OPERATIONS   INCOME   PERIOD RETURN(2) (000'S)   ASSETS          ASSETS
- ---------------- --------- ---------- ----------- ---------- ---------- ------ --------- -------- --------      ------------
<S>              <C>       <C>        <C>         <C>        <C>        <C>    <C>       <C>      <C>           <C>
                                                            CLASS A
                                                            -------
11/01/93 -
 3/31/94(3).....   $5.07     $0.13      $(0.23)     $(0.10)    $(0.18)  $4.79    (2.10)% $ 12,600   1.42%(4)(7)     8.25%(4)(7)
3/31/95.........    4.79      0.43       (0.66)      (0.23)     (0.42)   4.14    (5.10)    14,213   1.59            9.58
3/31/96.........    4.14      0.39        0.16        0.55      (0.40)   4.29    13.78     16,762   1.46            8.96
3/31/97.........    4.29      0.37        0.10        0.47      (0.37)   4.39    11.43     22,601   1.42            8.68
3/31/98.........    4.39      0.40        0.27        0.67      (0.38)   4.68    15.84     25,517   1.45            8.83
                                                            CLASS B
                                                            -------
11/01/93 -
 3/31/94(3).....   $5.07     $0.15      $(0.27)     $(0.12)    $(0.16)  $4.79    (2.52)% $174,072   2.11%(4)        7.48%(4)
3/31/95.........    4.79      0.40       (0.65)      (0.25)     (0.39)   4.15    (5.46)   132,378   2.12            8.98
3/31/96.........    4.15      0.36        0.17        0.53      (0.38)   4.30    13.09    110,949   2.06            8.42
3/31/97.........    4.30      0.35        0.10        0.45      (0.35)   4.40    10.73     78,081   2.04            8.05
3/31/98.........    4.40      0.38        0.26        0.64      (0.35)   4.69    15.11     63,397   2.06            8.14
<CAPTION>
DIVERSIFIED INCOME FUND
- -----------------------
                 PORTFOLIO
  PERIOD ENDED   TURNOVER
- ---------------- ---------
<S>              <C>
11/01/93 -
 3/31/94(3).....     48%
3/31/95.........    160
3/31/96.........    166
3/31/97.........    131
3/31/98.........    157
11/01/93 -
 3/31/94(3).....     48%
3/31/95.........    160
3/31/96.........    166
3/31/97.........    131
3/31/98.........    157
 
- --------------------------------------------------------------------------------
 
<CAPTION>
HIGH INCOME FUND
- ----------------
                                       NET GAIN
                                       (LOSS) ON                                                  RATIO OF
                                      INVESTMENTS                        NET               NET    EXPENSES      RATIO OF NET
                 NET ASSET               (BOTH               DIVIDENDS  ASSET             ASSETS     TO          INVESTMENT
                  VALUE,      NET      REALIZED   TOTAL FROM  FROM NET  VALUE,            END OF  AVERAGE        INCOME TO
                 BEGINNING INVESTMENT     AND     INVESTMENT INVESTMENT END OF   TOTAL    PERIOD    NET         AVERAGE NET
  PERIOD ENDED   OF PERIOD INCOME(1)  UNREALIZED) OPERATIONS   INCOME   PERIOD RETURN(2) (000'S)   ASSETS          ASSETS
- ---------------- --------- ---------- ----------- ---------- ---------- ------ --------- -------- --------      ------------
<S>              <C>       <C>        <C>         <C>        <C>        <C>    <C>       <C>      <C>           <C>
                                                            CLASS A
                                                            -------
3/31/94(5)......   $8.12     $0.87      $(0.14)      $0.73     $(0.82)  $8.03     9.14%  $ 33,724   1.72%          10.34%
3/31/95.........    8.03      0.78       (1.03)      (0.25)     (0.83)   6.95    (2.91)    40,585   1.61           10.82
3/31/96.........    6.95      0.67        0.02        0.69      (0.69)   6.95    10.43     35,963   1.53            9.36
3/31/97.........    6.95      0.65        0.12        0.77      (0.66)   7.06    11.46     41,139   1.50            9.10
3/31/98.........    7.06      0.68        0.68        1.36      (0.64)   7.78    20.07     56,442   1.52            9.13
                                                            CLASS B
                                                            -------
10/01/93 -
 3/31/94(6).....   $8.18     $0.38      $(0.17)     $ 0.21     $(0.35)  $8.04     2.46%  $131,713   2.15%(4)(7)     9.07%(4)(7)
3/31/95.........    8.04      0.73       (1.02)      (0.29)     (0.79)   6.96    (3.42)   153,034   2.16 (7)       10.26 (7)
3/31/96.........    6.96      0.62        0.03        0.65      (0.65)   6.96     9.83     91,800   2.06 (7)        8.85 (7)
3/31/97.........    6.96      0.61        0.12        0.73      (0.62)   7.07    10.78     98,383   2.11 (7)        8.49 (7)
3/31/98.........    7.07      0.63        0.69        1.32      (0.60)   7.79    19.31    124,962   2.13            8.51
                                                            CLASS C
                                                            -------
2/02/98 -
  3/31/98(6)....   $7.70     $0.10      $ 0.07      $ 0.17     $(0.08)  $7.79     2.18%  $  1,146   2.10%(4)(7)     9.78%(4)(7)
<CAPTION>
HIGH INCOME FUND
- ----------------
                 PORTFOLIO
  PERIOD ENDED   TURNOVER
- ---------------- ---------
<S>              <C>
3/31/94(5)......    290%
3/31/95.........    196
3/31/96.........    183
3/31/97.........    164
3/31/98.........    236
10/01/93 -
 3/31/94(6).....    290%
3/31/95.........    196
3/31/96.........    183
3/31/97.........    164
3/31/98.........    236
2/02/98 -
  3/31/98(6)....    236%
</TABLE>
- ------------
(1)Calculated based upon average shares outstanding
(2)Total return is not annualized and does not reflect sales load
(3)Pursuant to a reorganization of the SunAmerica Mutual Funds, the Fund
  changed its fiscal year end to March 31
(4)Annualized
(5)Restated to reflect 1.174107276-for-1 stock split effective October 1, 1993
(6)Commencement of sale of respective class of shares
(7)Net of the following expense reimbursements (based on average net assets):
 
<TABLE>
<CAPTION>
                                    3/31/94 3/31/95 3/31/96 3/31/97 3/31/98
                                    ------- ------- ------- ------- -------
   <S>                              <C>     <C>     <C>     <C>     <C>
   Diversified Income Fund Class A    .62%     --      --      --      --
   High Income Fund
    Class B                           .08%    .08%    .08%    .01%     --
   High Income Fund
    Class C                            --      --      --      --    5.37%
</TABLE>
 
See Notes to Financial Statements
 
                                       10
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 FINANCIAL HIGHLIGHTS
 
<TABLE>
<CAPTION>
TAX EXEMPT INSURED FUND
- -----------------------
                                       NET GAIN
                                       (LOSS) ON                                                  RATIO OF        RATIO OF
                                      INVESTMENTS                        NET               NET    EXPENSES          NET
                 NET ASSET               (BOTH               DIVIDENDS  ASSET             ASSETS     TO          INVESTMENT
                  VALUE,      NET      REALIZED   TOTAL FROM  FROM NET  VALUE,            END OF  AVERAGE        INCOME TO
                 BEGINNING INVESTMENT     AND     INVESTMENT INVESTMENT END OF   TOTAL    PERIOD    NET           AVERAGE
  PERIOD ENDED   OF PERIOD INCOME(1)  UNREALIZED) OPERATIONS   INCOME   PERIOD RETURN(2) (000'S)   ASSETS        NET ASSETS
- ---------------- --------- ---------- ----------- ---------- ---------- ------ --------- -------- --------       ----------
<S>              <C>       <C>        <C>         <C>        <C>        <C>    <C>       <C>      <C>            <C>
                                                            CLASS A
                                                            -------
11/01/93-
 3/31/94(3).....  $12.79     $0.26      $(0.84)     $(0.58)    $(0.26)  $11.95   (4.61)% $165,216  $1.28%(4)(5)     4.99%(4)(5)
3/31/95.........   11.95      0.63        0.17        0.80      (0.62)   12.13    6.97    137,955   1.20  (5)       5.32  (5)
3/31/96.........   12.13      0.59        0.29        0.88      (0.59)   12.42    7.37    121,957   1.22            4.72
3/31/97.........   12.42      0.59       (0.07)       0.52      (0.59)   12.35    4.24     98,376   1.24            4.77
3/31/98.........   12.35      0.58        0.67        1.25      (0.57)   13.03   10.28     88,519   1.24            4.52
                                                            CLASS B
                                                            -------
11/01/93-
 3/31/94(3).....  $12.79     $0.22      $(0.83)     $(0.61)    $(0.23)  $11.95   (4.84)%  $20,765   2.12%(4)        4.17%(4)
3/31/95.........   11.95      0.54        0.19        0.73      (0.54)   12.14    6.29     25,985   1.92            4.60
3/31/96.........   12.14      0.50        0.29        0.79      (0.51)   12.42    6.58     29,315   1.90            4.03
3/31/97.........   12.42      0.52       (0.08)       0.44      (0.51)   12.35    3.57     25,053   1.88            4.13
3/31/98.........   12.35      0.49        0.68        1.17      (0.48)   13.04    9.65     22,878   1.90            3.86
<CAPTION>
TAX EXEMPT INSURED FUND
- -----------------------
                 PORTFOLIO
  PERIOD ENDED   TURNOVER
- ---------------- ---------
<S>              <C>
11/01/93-
 3/31/94(3).....     52%
3/31/95.........    162
3/31/96.........     46
3/31/97.........     51
3/31/98.........     48
11/01/93-
 3/31/94(3).....     52%
3/31/95.........    162
3/31/96.........     46
3/31/97.........     51
3/31/98.........     48
</TABLE>
- ------------
(1)Calculated based upon average shares outstanding
(2)Total return is not annualized and does not reflect sales load
(3)Pursuant to a reorganization of the SunAmerica Mutual Funds, the Fund
changed its fiscal year end to March 31
(4)Annualized
(5)Net of the following expense reimbursements (based on average net assets):
 
<TABLE>
<CAPTION>
                                    3/31/94 3/31/95
                                    ------- -------
   <S>                              <C>     <C>
   Tax Exempt Insured Fund Class A   .11%    .04%
</TABLE>
 
 
 
See Notes to Financial Statements
 
                                       11
<PAGE>
 
 SUNAMERICA U.S. GOVERNMENT SECURITIES FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998
<TABLE>
<CAPTION>
                                                        PRINCIPAL
                                                          AMOUNT        VALUE
                SECURITY DESCRIPTION                  (IN THOUSANDS)  (NOTE 2)
<S>                                                   <C>            <C>
 
- --------------------------------------------------------------------------------
FEDERAL HOME LOAN MORTGAGE CORP.--23.5%
 7.50% due 4/01/24 - 6/01/25........................      $8,012     $ 8,215,251
 8.50% due 6/01/01..................................           2           2,160
 9.00% due 1/01/02 - 10/01/16.......................         391         416,031
 9.25% due 9/01/08 - 3/01/17........................         370         394,611
 9.50% due 9/01/16 - 9/01/21........................       4,119       4,418,663
 10.00% due 10/01/02 - 8/01/21......................      15,325      16,675,690
 10.50% due 6/01/00 - 1/01/21.......................         571         631,669
 10.75% due 9/01/00 - 1/01/15.......................         182         203,916
 11.00% due 9/01/00 - 6/01/17.......................       1,540       1,739,678
 11.25% due 11/01/13................................          57          64,759
 11.50% due 11/01/01 - 7/01/19......................         633         718,689
 11.75% due 8/01/11 - 10/01/14......................         152         173,158
 12.00% due 7/01/99 - 1/01/15.......................         122         138,247
 12.13% due 9/01/11.................................         558         624,175
 12.25% due 10/01/99 - 7/01/15......................         476         550,246
 12.50% due 8/01/99 - 4/01/19.......................      15,875      18,630,645
 12.75% due 9/01/04 - 6/01/15.......................         660         771,482
 13.00% due 5/01/00 - 10/01/15......................       8,227       9,782,769
 13.25% due 11/01/10 - 5/01/15......................         952       1,130,103
 13.50% due 2/01/10 - 2/01/19.......................       4,632       5,583,329
 13.75% due 7/01/11 - 8/01/14.......................          80          95,327
 14.00% due 6/01/11 - 4/01/16.......................         503         606,226
 14.50% due 12/01/10 - 5/01/13......................          87         105,066
                                                                     -----------
TOTAL FEDERAL HOME LOAN MORTGAGE CORP.
 (cost $68,417,577).................................                  71,671,890
                                                                     -----------
FEDERAL NATIONAL MORTGAGE ASSOCIATION--14.7%
 5.25% due 1/15/03..................................       5,000       4,884,350
 5.75% due 2/15/08..................................      10,250      10,078,620
 6.50% due 8/01/99 - 1/01/01........................       5,137       5,168,826
 8.00% due 12/01/22 - 1/01/23.......................      12,288      12,721,431
 9.00% due 6/01/01 - 4/01/07........................       1,759       1,848,799
 9.25% due 12/01/10 - 1/01/17.......................         383         407,053
 10.25% due 6/01/14 - 7/01/16.......................         104         114,099
 10.50% due 3/01/15.................................         295         325,778
 11.00% due 3/01/09 - 8/01/20.......................         986       1,104,936
 11.50% due 5/01/00 - 3/01/14.......................         411         449,611
 11.75% due 11/01/15................................          22          25,132
 12.00% due 9/01/07 - 3/01/17.......................       2,154       2,482,482
 12.25% due 9/01/99 - 10/01/15......................       1,127       1,307,952
 12.50% due 12/01/09 - 9/01/15......................         852         989,773
 12.75% due 9/01/12 - 9/01/15.......................         375         442,835
 13.00% due 10/01/09 - 9/01/16......................          95         112,280
 13.25% due 10/01/13 - 2/01/15......................         162         193,351
 13.50% due 10/01/10 - 2/01/17......................       1,222       1,473,937
 13.75% due 11/01/11 - 10/01/14.....................         107         128,801
 14.00% due 10/01/14................................         288         349,937
 14.50% due 7/01/11.................................         123         149,826
 14.75% due 7/01/12.................................          88         112,007
 15.00% due 10/01/12 - 2/01/13......................         116         141,658
 15.50% due 10/01/12................................          51          62,194
                                                                     -----------
 TOTAL FEDERAL NATIONAL MORTGAGE ASSOCIATION
  (cost $44,849,193)................................                  45,075,668
                                                                     -----------
</TABLE>
<TABLE>
<CAPTION>
                                                        PRINCIPAL
                                                          AMOUNT        VALUE
                SECURITY DESCRIPTION                  (IN THOUSANDS)  (NOTE 2)
<S>                                                   <C>            <C>
 
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION--26.9%
 6.50% due TBA......................................     $ 5,000     $ 4,948,786
 7.00% due 7/15/23 - 9/15/25........................      12,339      12,464,670
 7.00% due TBA......................................      14,000      14,140,000
 7.50% due 1/15/17 - 10/15/23.......................      21,728      22,281,683
 8.50% due 6/15/01 - 11/15/20.......................       8,961       9,393,622
 9.00% due 5/15/01 - 12/15/20.......................       6,893       7,366,656
 9.50% due 4/15/98 - 7/15/20........................       1,842       1,981,059
 10.00% due 5/15/98 - 5/15/19.......................       1,315       1,422,027
 10.25% due 7/15/15.................................          48          55,066
 10.50% due 4/15/98 - 11/15/03......................         920         984,198
 11.00% due 4/15/98 - 1/15/11.......................         579         612,632
 11.50% due 11/15/98 - 1/15/21......................         755         857,591
 11.75% due 7/15/13 - 11/15/15......................         591         669,387
 12.00% due 9/15/98 - 12/15/15......................         472         531,586
 12.25% due 8/15/13 - 7/15/15.......................          36          40,552
 12.50% due 4/15/10 - 3/15/16.......................         191         216,920
 12.75% due 10/15/13................................           5           6,218
 13.25% due 7/15/14 - 9/15/14.......................          92         105,454
 13.50% due 5/15/10 - 1/15/15.......................       1,642       1,971,119
 14.00% due 5/15/11 - 12/15/14......................         954       1,146,302
 15.00% due 6/15/11 - 2/15/13.......................         649         786,414
 16.00% due 12/15/11 - 7/15/12......................         255         311,496
                                                                     -----------
TOTAL GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
 (cost $82,622,530).................................                  82,293,438
                                                                     -----------
GOVERNMENT NATIONAL
 MORTGAGE ASSOCIATION II--0.8%
 10.00% due 9/20/16 - 4/20/19.......................          15          16,214
 11.50% due 8/20/13 - 7/20/20.......................         860         993,528
 11.75% due 5/20/15 - 2/20/16.......................         262         293,811
 12.00% due 10/20/13 - 5/20/15......................         541         628,449
 12.25% due 10/20/15................................          33          37,569
 12.50% due 9/20/13 - 1/20/15.......................          50          59,961
 12.75% due 11/20/13 - 7/20/15......................         143         164,543
 13.25% due 12/20/14 - 5/20/15......................          60          68,500
 13.50% due 10/20/14................................          71          86,214
                                                                     -----------
TOTAL GOVERNMENT NATIONAL MORTGAGE ASSOCIATION II
 (cost $2,272,316)..................................                   2,348,789
                                                                     -----------
U.S. TREASURY NOTES--22.8%
 5.50% due 2/28/03(1)...............................      37,150      36,929,329
 5.50% due 2/15/08..................................      22,775      22,497,373
 6.13% due 8/15/07..................................      10,000      10,284,400
                                                                     -----------
TOTAL U.S. TREASURY NOTES
 (cost $69,420,168).................................                  69,711,102
                                                                     -----------
U.S. TREASURY BONDS--11.4%
 6.13% due 11/15/27.................................      23,360      23,954,979
 6.38% due 8/15/27..................................      10,250      10,826,563
                                                                     -----------
TOTAL U.S. TREASURY BONDS
 (cost $34,529,473).................................                  34,781,542
                                                                     -----------
</TABLE>
 
                                       12
<PAGE>
 
 SUNAMERICA U.S. GOVERNMENT SECURITIES FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
<TABLE>
<CAPTION>
                                                      PRINCIPAL
                                                        AMOUNT        VALUE
               SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                 <C>            <C>
 
- --------------------------------------------------------------
 TOTAL INVESTMENT SECURITIES--100.1%
 (cost $302,111,257)..............................                 $305,882,429
                                                                   ------------
SHORT-TERM SECURITIES--0.2%
 United States Treasury Bills
  5.00% due 7/02/98 (cost $493,605)(4)............     $   500          493,611
                                                                   ------------
REPURCHASE AGREEMENT--9.0%
 PaineWebber, Inc. Joint Repurchase Agreement
  Account (Note 2) (cost $27,473,000)(3)(4).......      27,473       27,473,000
                                                                   ------------
TOTAL INVESTMENTS--
 (cost $330,077,862*).............................       109.3%     333,849,040
Liabilities in excess of other assets(2)..........        (9.3)     (28,403,098)
                                                       -------     ------------
NET ASSETS--                                             100.0%    $305,445,942
                                                       =======     ============
</TABLE>
- --------
* See Note 5
TBA--Securities purchased on a forward commitment basis with an approximate
  principal amount and no definitive maturity date. The actual principal and
  maturity date will be determined upon settlement.
(1) The security or a portion thereof is out on loan; see Note 2.
(2) Includes a liability of fully collateralized securities on loan.
(3) Includes cash received as collateral for securities out on loan in the
    amount of $23,543,750.
(4) The security or a portion thereof represents collateral for the following
    open futures contracts:
 
<TABLE>
<CAPTION>
                                     VALUE AS OF
   NUMBER OF      DESCRIPTION AND     MARCH 31,  UNREALIZED
   CONTRACTS      EXPIRATION DATE       1998        GAIN
   ---------      ---------------    ----------- ----------
   <S>         <C>                   <C>         <C>
   193 Long    U.S. Treasury 10 Year $21,688,375  $76,457
               Note--June 98
</TABLE>
 
See Notes to Financial Statements
 
 
                                       13
<PAGE>
 
 SUNAMERICA FEDERAL SECURITIES FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998
 
<TABLE>
<CAPTION>
                                                        PRINCIPAL
                                                          AMOUNT        VALUE
                SECURITY DESCRIPTION                  (IN THOUSANDS)  (NOTE 2)
<S>                                                   <C>            <C>
 
- --------------------------------------------------------------------------------
FEDERAL HOME LOAN MORTGAGE CORP.--7.6%
 7.50% due 2/01/23 - 6/01/25........................      $1,671     $ 1,713,837
 10.00% due 1/01/17.................................       1,942       2,124,935
 12.50% due 9/30/13(1)..............................          14          13,531
 13.50% due 2/01/14.................................           6           7,545
                                                                     -----------
TOTAL FEDERAL HOME LOAN MORTGAGE CORP.
 (cost $3,812,534)..................................                   3,859,848
                                                                     -----------
FEDERAL NATIONAL MORTGAGE ASSOCIATION--3.9%
 5.75% due 2/15/08..................................       2,000       1,966,560
 15.50% due 10/01/12................................           7           8,892
                                                                     -----------
TOTAL FEDERAL NATIONAL MORTGAGE ASSOCIATION
 (cost $1,999,438)..................................                   1,975,452
                                                                     -----------
GOVERNMENT NATIONAL MORTGAGE
 ASSOCIATION--38.5%
 7.00% due 3/15/23 - 9/15/25........................       5,693       5,758,317
 8.50% due 3/15/17 - 9/15/24........................       8,792       9,306,082
 9.00% due 6/15/16 - 5/15/17........................       3,357       3,635,404
 11.25% due 8/15/15.................................          25          27,718
 12.00% due 5/15/15.................................          27          31,738
 12.25% due 9/15/13 - 7/15/15.......................         427         481,326
 12.50% due 11/15/10 - 6/15/15......................          91         105,584
 13.25% due 10/15/13................................          20          22,680
 13.50% due 5/15/11 - 10/15/14......................          50          60,143
                                                                     -----------
TOTAL GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
 (cost $18,649,717).................................                  19,428,992
                                                                     -----------
GOVERNMENT NATIONAL MORTGAGE
 ASSOCIATION II--8.4%
 6.50% due TBA......................................       3,500       3,463,880
 10.00% due 10/20/13 - 3/20/17......................         288         317,292
 12.00% due 3/20/15 - 1/20/16.......................         164         191,741
 12.25% due 12/20/14 - 10/20/15.....................         225         252,409
 13.75% due 9/20/14.................................           8           9,117
                                                                     -----------
TOTAL GOVERNMENT NATIONAL MORTGAGE ASSOCIATION II
 (cost $4,201,124)..................................                   4,234,439
                                                                     -----------
U.S. TREASURY NOTES--4.0%
 6.13% due 12/31/01
 (cost $1,986,563)..................................       2,000       2,030,320
                                                                     -----------
U.S. TREASURY BONDS--26.0%
 zero coupon due 2/15/05 ...........................       8,080       5,466,362
 6.13% due 11/15/27.................................       6,420       6,583,518
 6.38% due 8/15/27..................................       1,000       1,056,250
                                                                     -----------
TOTAL U.S. TREASURY BONDS
 (cost $13,136,062).................................                  13,106,130
                                                                     -----------
TOTAL INVESTMENT SECURITIES--88.4%
 (cost $43,785,438).................................                  44,635,181
                                                                     -----------
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)  (NOTE 2)
<S>                                                  <C>            <C>
 
REPURCHASE AGREEMENT--17.9%
 PaineWebber, Inc.
 Joint Repurchase Agreement
 Account (Note 2)
 (cost $9,030,000).................................     $ 9,030     $9,030,000
                                                                    -----------
TOTAL INVESTMENTS--
 (cost $52,815,438*)...............................       106.3%     53,665,181
Liabilities in excess of other assets..............        (6.3)     (3,200,983)
                                                        -------     -----------
NET ASSETS--                                              100.0%    $50,464,198
                                                        =======     ===========
</TABLE>
- -------
* See Note 5
(1) Fair valued security; see Note 2
TBA--Securities purchased on a forward commitment basis with an approximate
principal amount and no definitive maturity date. The actual principal amount
and maturity date will be determined upon settlement date.
See Notes to Financial Statements
 
                                      14
<PAGE>
 
 SUNAMERICA DIVERSIFIED INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
CORPORATE BONDS & NOTES--40.5%
BROADCASTING--3.6%
 Big City Radio, Inc.
 Sr. Disc. Notes
 zero coupon due 3/15/05(1)(2)..                           $ 750    $    551,250
 Fox Kids Worldwide, Inc.
 Sr. Notes
 9.25% due 11/01/07(1).............................        1,000       1,005,000
 Peoples Choice TV Corp.
 Sr. Disc. Notes
 zero coupon due 6/01/04(2)(5).....................        1,000         220,000
 Spanish Broadcasting Systems, Inc.
 Sr. Notes
 12.50% due 6/15/02(1).............................        1,250       1,431,250
                                                                    ------------
                                                                       3,207,500
                                                                    ------------
CABLE--3.9%
 Diamond Holdings PLC
 Sr. Notes
 9.13% due 2/01/08(1)..............................        1,000       1,030,000
 Echostar Satellite Broadcasting Corp.
 Sr. Secured Disc. Notes
 zero coupon due 3/15/04(2)........................          500         456,250
 UIH Australia Pacific, Inc.
 Sr. Disc. Notes, Series B
 zero coupon due 5/15/06(2)........................        1,000         690,000
 United International Holdings, Inc.
 Sr. Secured Disc. Notes
 zero coupon due 2/15/08(1)(2).....................        2,000       1,250,000
                                                                    ------------
                                                                       3,426,250
                                                                    ------------
CELLULAR--5.7%
 Celcaribe SA
 Sr. Notes
 13.50% due 3/15/04................................          750         773,437
 Cencall Communications Corp.
 Sr. Disc. Notes
 zero coupon due 1/15/04(2)........................        1,000         970,000
 International Wireless Communication
 Sr. Secured Disc. Notes
 zero coupon due 8/15/01...........................        1,750         603,750
 Microcell Telecommunications
 Sr. Disc. Notes, Series B
 zero coupon due 6/01/06(2)........................        1,000         742,500
 Omnipoint Communications, Inc.
 Sr. Notes
 8.88% due 2/17/06(1)(4)...........................        1,000         997,500
 Transtel Pass Through Trust
 Sr. Notes
 12.50% due 11/01/07(1)............................        1,000         956,250
                                                                    ------------
                                                                       5,043,437
                                                                    ------------
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
CONSUMER GOODS--1.7%
 Polymer Group, Inc.
 Sr. Subordinated Notes, Series B
 9.00% due 7/01/07.................................      $1,500     $  1,556,250
                                                                    ------------
ENERGY--0.5%
 Southwest Royalties, Inc.
 Sr. Notes, Series B
 10.50% due 10/15/04...............................         500          445,000
                                                                    ------------
FINANCIAL SERVICES--1.7%
 Homeside, Inc.
 Sr. Secured Priority Notes, Series B
 11.25% due 5/15/03................................       1,299        1,549,058
                                                                    ------------
LEISURE & TOURISM--1.2%
 HMH Properties, Inc.
 Sr. Secured Notes, Series B
 9.50% due 5/15/05.................................       1,000        1,062,500
                                                                    ------------
MANUFACTURING--2.3%
 Trident Automotive PLC
 Sr. Subordinated Notes
 10.00% due 12/15/05(1)............................       1,000        1,035,000
 Wavetek Corp.
 Sr. Subordinated Notes
 10.13% due 6/15/07................................       1,000        1,040,000
                                                                    ------------
                                                                       2,075,000
                                                                    ------------
MEDIA--1.9%
 Diva Systems Corp.
 Sr. Disc. Notes
 zero coupon due 3/01/08(1)(2)(5)..................         750          412,500
 Knology Holdings, Inc.
 Sr. Disc. Notes
 zero coupon due 10/15/07(2).......................         500          300,000
 SFX Entertainment, Inc.
 Sr. Subordinated Notes
 9.13% due 2/01/08(1)..............................       1,000          985,000
                                                                    ------------
                                                                       1,697,500
                                                                    ------------
</TABLE>
 
 
                                       15
<PAGE>
 
 SUNAMERICA DIVERSIFIED INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
CORPORATE BONDS & NOTES (CONTINUED)
METALS & MINING--4.8%
 Acme Metals, Inc.
 Sr. Notes
 10.88% due 12/15/07(1)............................       $  500    $    517,500
 Acme Metals, Inc.
 Sr. Notes
 12.50% due 8/01/02................................        1,000       1,068,750
 Kaiser Aluminum & Chemical Corp.
 Sr. Subordinated Notes
 12.75% due 2/01/03................................        1,000       1,066,250
 Renco Metals, Inc.
 Sr. Notes
 11.50% due 7/01/03................................        1,500       1,597,500
                                                                    ------------
                                                                       4,250,000
                                                                    ------------
OFFICE PRODUCTS--0.7%
 American Pad & Paper Co.
 Sr. Subordinated Notes, Series B
 13.00% due 11/15/05...............................          650         656,500
                                                                    ------------
OIL & GAS--1.8%
 Statia Terms International
 Mortgage Notes, Series B 11.75% due 11/15/03......        1,500       1,595,625
                                                                    ------------
PAPER PRODUCTS--0.9%
 Florida Coast Paper Co. LLC
 First Mortgage Notes, Series B
 12.75% due 6/01/03................................          750         802,500
                                                                    ------------
RETAIL--0.7%
 Electronic Retailing Systems International
 Sr. Disc. Notes
 zero coupon due 2/01/04(2)........................        1,000         580,000
                                                                    ------------
SHIPPING--2.0%
 Golden Ocean Group Ltd.
 Sr. Notes
 10.00% due 8/31/01(1)(5)..........................        1,000         766,250
 Panoceanic Bulk Carriers Ltd.
  First Preferred Ship
  Mortgage Notes
 12.00% due 12/15/07(1)............................        1,000         977,500
                                                                    ------------
                                                                       1,743,750
                                                                    ------------
TELECOMMUNICATIONS--7.1%
 Covad Communications Group, Inc.
 Sr. Disc. Notes
 zero coupon due 3/15/08(1)(2)(5)..................        1,000         525,000
 DTI Holdings, Inc.
 Sr. Disc. Notes
 zero coupon due 3/01/08(2)(5).....................          750         436,875
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
TELECOMMUNICATIONS (CONTINUED)
 Hermes Europe Railtel BV
 Sr. Notes
 11.50% due 8/15/07(1).............................       $1,000    $  1,132,500
 ICG Holdings, Inc.
 Sr. Disc. Notes
 zero coupon due 3/15/07(1)(2).....................        1,250         912,500
 MGC Communications, Inc.
 Sr. Secured Notes, Series B
 13.00% due 10/01/04(1)(5).........................          750         780,000
 Orbcomm Global LP
 Sr. Notes
 14.00% due 8/15/04................................        1,000       1,167,500
 Orion Network Systems, Inc.
 Sr. Disc. Notes
 zero coupon due 1/15/07(2)........................        1,000         767,500
 USN Communications, Inc.
 Sr. Disc. Notes, Series B
 zero coupon due 8/15/04(2)........................          750         615,000
                                                                    ------------
                                                                       6,336,875
                                                                    ------------
TOTAL CORPORATE BONDS & NOTES
 (cost $36,280,671)..................................                 36,027,745
                                                                    ------------
FOREIGN BONDS & NOTES--47.1%
BROADCASTING--3.4%
 Central European Media Enterprises Ltd.
 Sr. Notes
 9.38% due 8/15/04.................................        1,000         991,510
 RBS Participacoes SA
 Guaranteed Notes
 11.00% due 4/01/07(1).............................        1,000         998,270
 Tv Azteca SA de CV
 Guaranteed Sr. Notes, Series B
 10.50% due 2/15/07................................        1,000       1,067,500
                                                                    ------------
                                                                       3,057,280
                                                                    ------------
CABLE--4.4%
 Australis Holdings Property Ltd.
 Sr. Disc. Notes
 zero coupon due 11/01/02(2).......................          500         174,995
 Comcast UK Cable Partners Ltd.
 Sr. Disc. Notes
 zero coupon due 11/15/07(2).......................        2,000       1,660,000
 Multicanal Participacoes SA
 Guaranteed Sr. Notes
 12.63% due 6/18/04................................        1,000       1,097,500
 Tevecap SA
 Sr. Notes, Series B
 12.63% due 11/26/04...............................        1,000       1,011,120
                                                                    ------------
                                                                       3,943,615
                                                                    ------------
</TABLE>
 
                                       16
<PAGE>
 
 SUNAMERICA DIVERSIFIED INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
FOREIGN BONDS & NOTES (CONTINUED)
CELLULAR--1.7%
 Occidente Y Caribe Celular SA
 Sr. Disc. Notes, Series B
 zero coupon due 3/15/04(2)........................       $2,000    $  1,535,000
                                                                    ------------
FINANCE--1.8%
 Cei Citicorp Holdings SA
 Sr. Notes, Series B
 9.75% due 2/14/07.................................        1,500       1,560,000
                                                                    ------------
FOOD, BEVERAGE & TOBACCO--2.0%
 DGS International Finance Co. BV
 Guaranteed Notes
 10.00% due 6/01/07(1).............................        2,000       1,775,000
                                                                    ------------
FOOD RETAIL--2.3%
 Bepensa SA
 Sr. Notes
 9.75% due 9/30/04(1)..............................        2,000       2,010,180
                                                                    ------------
GOVERNMENT AGENCY--11.9%
 Federal Republic of Brazil
 Capitalization Bonds
 4.50% due 4/15/14(4)(6)...........................        2,281       1,915,637
 Republic of Argentina
 Bonds
 11.38% due 1/30/17................................        2,500       2,828,125
 Republic of Brazil
 Bonds
 10.13% due 5/15/27................................        2,562       2,549,190
 Republic of Venezuela
 Bonds
 9.25% due 9/15/27.................................        1,000         912,500
 United Mexican States
 Bonds
 11.38% due 9/15/16................................        2,000       2,355,000
                                                                    ------------
                                                                      10,560,452
                                                                    ------------
OIL & GAS--2.4%
 Bridas Corp.
 Sr. Notes
 12.50% due 11/15/99...............................        2,000       2,143,420
                                                                    ------------
PACKAGING--1.2%
 Vicap SA
 Guaranteed Sr. Notes
 11.38% due 5/15/07(1).............................        1,000       1,100,000
                                                                    ------------
PAGING--1.2%
 Paging Network Do Brasil SA
 Sr. Notes
 13.50% due 6/06/05................................        1,000       1,017,500
                                                                    ------------
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
SHIPPING--0.6%
 Pegasus Shipping Ltd.
 Sr. Mortgage Notes
 11.88% due 11/15/04(1)............................       $  500    $    503,750
                                                                    ------------
TELECOMMUNICATIONS--10.8%
 Colt Telecom Group PLC
 Sr. Disc. Notes
 zero coupon due 12/15/06(2).......................          750         585,937
 Globo Communicacoes e Participacoes SA
 Guaranteed Notes
 10.63% due 12/05/08...............................        2,000       2,035,000
 Ionica PLC
 Sr. Disc. Notes
 zero coupon due 5/01/07(2)(5).....................        2,500       1,028,125
 RSL Communications Ltd.
 Sr. Notes
 12.25% due 11/15/06...............................          150         168,375
 RSL Communications Ltd.
 Sr. Notes
 12.25% due 11/15/06...............................          350         399,000
 Telecom Argentina
 Notes
 12.00% due 11/15/02...............................        3,000       3,420,000
 Tricom SA
 Guaranteed Sr. Notes
 11.38% due 9/01/04................................        2,000       1,990,000
                                                                    ------------
                                                                       9,626,437
                                                                    ------------
TELEPHONE-- 2.3%
 Comtel Brasileira
 Bonds
 10.75% due 9/26/04................................        2,000       2,006,316
                                                                    ------------
UTILITY--1.1%
 Companhia Paranaense
 Unsubordinated Notes
 9.75% due 5/02/05(1)..............................        1,000       1,010,000
                                                                    ------------
TOTAL FOREIGN BONDS & NOTES
 (cost $39,689,184)................................                   41,848,950
                                                                    ------------
U.S. GOVERNMENT AND AGENCIES--5.6%
U.S. TREASURY BONDS--3.3%
 6.13% due 11/15/27................................        1,000       1,025,470
 11.13% due 8/15/03................................        1,500       1,871,490
                                                                    ------------
                                                                       2,896,960
                                                                    ------------
U.S. TREASURY NOTES--2.3%
 6.13% due 8/15/07.................................        2,000       2,056,880
                                                                    ------------
TOTAL U.S. GOVERNMENT AND AGENCIES
 (cost $5,280,781).................................                    4,953,840
                                                                    ------------
</TABLE>
 
                                       17
<PAGE>
 
 SUNAMERICA DIVERSIFIED INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
 
                                                           SHARES/     VALUE
                   SECURITY DESCRIPTION                    WARRANTS   (NOTE 2)
<S>                                                        <C>      <C>
 
- --------------------------------------------------------------------------------
PREFERRED STOCK--0.4%
CABLE--0.2%
 Echostar Communications Corp. 6.75%.....................     4,000 $    232,000
                                                                    ------------
TELECOMMUNICATIONS--0.2%
 IXC Communications, Inc. 6.75%(1).......................     3,000      154,875
                                                                    ------------
TOTAL PREFERRED STOCK
 (cost $377,375).........................................                386,875
                                                                    ------------
COMMON STOCK--0.2%
CELLULAR--0.2%
 Microcell Telecommunications+(1)........................    21,436      192,924
                                                                    ------------
PAGING--0.0%
 Paging Do Brazil Holdings Co. LLC,
  Class B+(1)(3).........................................     1,000           10
                                                                    ------------
TOTAL COMMON STOCK
 (cost $143,760).........................................                192,934
                                                                    ------------
WARRANTS--0.3%+
CABLE--0.0%
 Australis Holdings Property Ltd.(1).....................       500            0
 UIH Australia Pacific, Inc.(3)..........................     1,000           10
 United International Holdings, Inc......................     3,000       36,000
                                                                    ------------
                                                                          36,010
                                                                    ------------
CELLULAR--0.0%
 International Wireless Communication(1)(3)..............     1,750            0
 Occidente Y Caribe Celular SA(1)(3).....................     8,000       28,000
                                                                    ------------
                                                                          28,000
                                                                    ------------
MEDIA--0.0%
 Knology Holdings, Inc.(1)(3)............................     1,500        3,750
                                                                    ------------
RETAIL--0.1%
 Electronic Retailing Systems International..............     1,000       40,000
                                                                    ------------
SHIPPING--0.0%
 Golden Ocean Group Ltd..................................     1,000        4,000
                                                                    ------------
TELECOMMUNICATIONS--0.2%
 Hyperion Telecommunications, Inc.(1)....................     1,500      105,000
 MGC Communications, Inc.(1).............................       750       26,250
                                                                    ------------
                                                                         131,250
                                                                    ------------
TOTAL WARRANTS
 (cost $69,660)..........................................                243,010
                                                                    ------------
TOTAL INVESTMENT SECURITIES--94.1%
 (cost $81,841,431)......................................             83,653,354
                                                                    ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                                                     (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
SHORT-TERM SECURITIES--1.2%
PAPER PRODUCTS--1.2%
 Stone Container Corp.
 Sr. Notes
 11.88% due 12/01/98
 (cost $1,051,250).................................     $  1,000    $  1,030,000
                                                                    ------------
REPURCHASE AGREEMENT--1.9%
 PaineWebber, Inc.
 Joint Repurchase Agreement Account (Note 2)
 (cost $1,722,000).................................        1,722       1,722,000
                                                                    ------------
TOTAL INVESTMENTS--
 (cost $84,614,681*)...............................         97.2%     86,405,354
Other assets less liabilities......................          2.8       2,508,639
                                                        --------    ------------
NET ASSETS--                                               100.0%   $ 88,913,993
                                                        ========    ============
</TABLE>
- -------
* See Note 5
+ Non income producing security
(1) Resale restricted to qualified institutional buyers
(2) Represents a zero coupon bond which will convert to an interest- bearing
    security at a later date
(3) Fair valued security; see Note 2
(4) Variable rate security; rate as of March 31, 1998
(5) Bond issued as part of a unit which includes an equity component
(6) A portion of the coupon interest is received in cash and a portion is
    capitalized in the principal of the security
(7) Allocation of investments by country as a percentage of net assets as of
    March 31, 1998:
 
<TABLE>
   <S>                                                                     <C>
   United States.......................................................... 50.1%
   Brazil................................................................. 15.4%
   Argentina..............................................................  8.8%
   Mexico.................................................................  7.3%
   Britain................................................................  4.3%
   Bermuda................................................................  4.2%
   Dominican Republic.....................................................  2.2%
   Indonesia..............................................................  2.0%
   Columbia...............................................................  1.7%
   Venezuala..............................................................  1.0%
   Australia..............................................................  0.2%
                                                                           -----
                                                                           97.2%
                                                                           =====
</TABLE>
 
See Notes to Financial Statements
 
                                      18
<PAGE>
 
 SUNAMERICA HIGH INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998
 
<TABLE>
<CAPTION>
                                                      PRINCIPAL
                                                        AMOUNT        VALUE
               SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                 <C>            <C>
 
- -------------------------------------------------------------------------------
CORPORATE BONDS & NOTES--86.3%
AEROSPACE & DEFENSE--1.2%
 Hawk Corp.
  Sr. Notes
  10.25% due 12/01/03..............................     $2,000     $  2,150,000
                                                                   ------------
BROADCASTING--5.1%
 Big City Radio, Inc.
  Sr. Disc. Notes
  zero coupon due 3/15/05(1)(2)....................      2,000        1,470,000
 Busse Broadcasting Corp.
  Sr. Secured Notes
  11.63% due 10/15/00..............................      1,500        1,618,125
 Fox Kids Worldwide, Inc.
  Sr. Notes
  9.25% due 11/01/07(1)..                                1,500        1,507,500
 Peoples Choice TV Corp.
  Sr. Disc. Notes
  zero coupon due 6/01/04(2)(6)....................      3,500          770,000
 Radio One, Inc.
  Sr. Subordinated Notes, Series B
  7.00% due 5/15/04................................      1,385        1,412,700
 Spanish Broadcasting Systems, Inc.
  Sr. Notes
  12.50% due 6/15/02(1)............................      2,250        2,576,250
                                                                   ------------
                                                                      9,354,575
                                                                   ------------
BUILDING MATERIALS--0.7%
 Ainsworth Lumber Ltd.
  Sr. Secured Notes
  12.50% due 7/15/07(3)............................      1,250        1,284,375
                                                                   ------------
CABLE--5.6%
 Diamond Cable PLC
  Sr. Disc. Notes
  zero coupon due 2/15/07(1)(2)....................      1,500        1,057,500
 Diamond Holdings PLC
  Sr. Notes
  9.13% due 2/01/08(1).............................      1,500        1,545,000
 Echostar Satellite Broadcasting Corp.
  Sr. Secured Disc. Notes
  zero coupon due 3/15/04(2).......................      1,000          912,500
 International CableTel, Inc.
  Sr. Deferred Coupon Notes, Series B
  zero coupon due 2/01/06(2).......................      4,000        3,260,000
 UIH Australia Pacific, Inc.
  Sr. Disc. Notes, Series B
  zero coupon due 5/15/06(2).......................      1,000          690,000
 United International Holdings, Inc.
  Sr. Secured Disc. Notes
  zero coupon due 2/15/08(1)(2)....................      4,500        2,812,500
                                                                   ------------
                                                                     10,277,500
                                                                   ------------
</TABLE>
<TABLE>
<CAPTION>
                                                      PRINCIPAL
                                                        AMOUNT        VALUE
               SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                 <C>            <C>
 
CELLULAR--9.3%
 Celcaribe SA
  Sr. Notes
  13.50% due 3/15/04...............................     $1,000     $  1,031,250
 Cellnet Data Systems Inc.
  Sr. Notes
  zero coupon due 10/01/07(2)......................      2,000        1,115,000
 Cencall Communications Corp.
  Sr. Disc. Notes
  zero coupon due 1/15/04(2).......................      1,000          970,000
 Centennial Cellular Corp.
  Sr. Notes
  8.88% due 11/01/01...............................      1,000        1,025,000
 Comcast Cellular Holdings, Inc.
  Sr. Notes, Series B
  9.50% due 5/01/07................................      2,000        2,100,000
 International Wireless Communication
  Sr. Secured Disc. Notes
  zero coupon due 8/15/01..........................      3,250        1,121,250
 Microcell Telecommunications
  Sr. Disc. Notes, Series B
  zero coupon due 6/01/06(2).......................      2,000        1,485,000
 Millicom International Cellular
  Sr. Subordinated Disc. Notes
  zero coupon due 6/01/06(2).......................      1,500        1,170,000
 Nextel Communications, Inc.
  Sr. Disc. Notes
  zero coupon due 8/15/04(2).......................      2,000        1,925,000
 Nextel International, Inc.
  Sr. Disc. Notes
  zero coupon due 4/15/08(1)(2)....................        750          448,125
 Omnipoint Communications, Inc.
  Sr. Notes
  8.88% due 2/17/06(1)(5)..........................      2,000        1,995,000
 Omnipoint Corp.
  Sr. Notes, Series A
  11.63% due 8/15/06...............................      1,000        1,100,000
 Transtel Pass Through Trust
  Sr. Notes
  12.50% due 11/01/07(1)...........................      1,500        1,434,375
                                                                   ------------
                                                                     16,920,000
                                                                   ------------
CHEMICALS--2.6%
 American Pacific Corp.
  Sr. Notes
  9.25% due 3/01/05(1).............................      1,000        1,032,500
 Huntsman Corp.
  Sr. Subordinated Notes
  9.09% due 7/01/07(1)(5)..........................      1,500        1,535,625
 NL Industries, Inc.
  Sr. Notes
  11.75% due 10/15/03..............................      2,000        2,225,000
                                                                   ------------
                                                                      4,793,125
                                                                   ------------
</TABLE>
 
                                       19
<PAGE>
 
 SUNAMERICA HIGH INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                     PRINCIPAL
                                                       AMOUNT        VALUE
               SECURITY DESCRIPTION                (IN THOUSANDS)   (NOTE 2)
<S>                                                <C>            <C>
 
- ------------------------------------------------------------------------------
CORPORATE BONDS & NOTES (CONTINUED)
COMPUTERS--0.2%
 Verio, Inc.
  Sr. Notes
  13.50% due 6/15/04(1)(6)........................     $  300     $    405,000
                                                                  ------------
CONSUMER GOODS--5.3%
 Carson, Inc.
  Sr. Subordinated Notes, Series B
  10.38% due 11/01/07.............................      1,000        1,030,000
 Phillips Van Heusen Corp.
  Debenture
  7.75% due 11/15/23..............................      1,500        1,365,000
 Polymer Group, Inc.
  Sr. Subordinated Notes
  8.75% due 3/01/08(1)............................      2,000        2,040,000
 Polymer Group, Inc.
  Sr. Subordinated Notes, Series B
  9.00% due 7/01/07...............................      5,000        5,187,500
                                                                  ------------
                                                                     9,622,500
                                                                  ------------
 
 
ENERGY--4.4%
 ICO, Inc.
  Sr. Notes, Series B
  10.38% due 6/01/07(1)...........................      1,250        1,309,375
 Parker Drilling Company
  Sr. Notes, Series C
  9.75% due 11/15/06(1)...........................      2,000        2,140,000
 Pride Petroleum Services, Inc.
  Subordinated Debenture
  9.38% due 5/01/07...............................      2,000        2,130,000
 Southwest Royalties, Inc.
  Sr. Notes, Series B
  10.50% due 10/15/04.............................      1,750        1,557,500
 Transamerican Energy Corp.
  Sr. Disc. Notes, Series B
  zero coupon due 6/15/02(1)(2)...................      1,000          850,000
                                                                  ------------
                                                                     7,986,875
                                                                  ------------
FINANCIAL SERVICES--3.1%
 Homeside, Inc.
  Sr. Secured Priority Notes, Series B
  11.25% due 5/15/03..............................      2,598        3,098,115
 Nationwide Credit, Inc.
  Sr. Subordinated Notes
  10.25% due 1/15/08(1)...........................      1,000        1,030,000
 Western Financial Savings Bank
  Sr. Subordinated Notes
  8.88% due 8/01/07...............................      1,500        1,453,125
                                                                  ------------
                                                                     5,581,240
                                                                  ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                     PRINCIPAL
                                                       AMOUNT         VALUE
               SECURITY DESCRIPTION                (IN THOUSANDS)   (NOTE 2)
<S>                                                <C>            <C>
 
FOOD SERVICE--0.9%
 Richmont Marketing Specialist
  Sr. Subordinated Notes
  10.13% due 12/15/07(1)..........................    $ 1,500     $   1,560,000
                                                                  -------------
FOOD & BEVERAGES--1.6%
 Specialty Foods Acquisition Corp.
  Sr. Disc. Notes, Series B
  zero coupon due 8/15/05(2)......................      1,500           605,625
 Specialty Foods Corp.
  Sr. Notes
  11.13% due 10/01/02.............................      2,250         2,283,750
                                                                  -------------
                                                                      2,889,375
                                                                  -------------
GAMING--2.0%
 Ameristar Casinos, Inc.
  Sr. Subordinated Notes,
  Series B
  10.50% due 8/01/04..............................      2,000         2,100,000
 Capital Gaming International, Inc.
  Promissory Notes
  zero coupon due 8/01/95(4)(7)...................         20               200
 Hard Rock Hotel, Inc.
  Sr. Subordinated Notes
  9.25% due 4/01/05(1)............................      1,500         1,530,000
                                                                  -------------
                                                                      3,630,200
                                                                  -------------
HEALTH CARE--0.8%
 Schein Pharmaceutical, Inc.
  Sr. Notes
  8.59% due 12/15/04(1)(5)........................      1,500         1,458,750
                                                                  -------------
HEALTH SERVICES--2.0%
 Abbey Healthcare Group, Inc.
  Sr. Subordinated Notes
  9.50% due 11/01/02..............................      1,025         1,045,500
 Tenet Healthcare Corp.
  Sr. Notes
  8.00% due 1/15/05...............................      2,500         2,562,500
                                                                  -------------
                                                                      3,608,000
                                                                  -------------
HOUSEHOLD PRODUCTS--1.6%
 French Fragrances, Inc.
  Sr. Notes, Series B
  10.38% due 5/15/07..............................      2,250         2,396,250
 Signature Brands USA, Inc.
  Sr. Subordinated Notes
  13.00% due 8/15/02(6)...........................        500           565,000
                                                                  -------------
                                                                      2,961,250
                                                                  -------------
</TABLE>
 
                                       20
<PAGE>
 
 SUNAMERICA HIGH INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                     PRINCIPAL
                                                       AMOUNT        VALUE
               SECURITY DESCRIPTION                (IN THOUSANDS)   (NOTE 2)
<S>                                                <C>            <C>
 
- ------------------------------------------------------------------------------
CORPORATE BONDS & NOTES (CONTINUED)
LEISURE & TOURISM--2.3%
 HMH Properties, Inc.
  Sr. Secured Notes, Series B
  9.50% due 5/15/05...............................   $    3,000   $  3,187,500
 Premier Parks, Inc.
  Sr. Notes
  9.25% due 4/01/06...............................        1,000      1,022,500
                                                                  ------------
                                                                     4,210,000
                                                                  ------------
MANUFACTURING--3.4%
 Columbus Mckinnon Corp.
  Sr. Subordinated Notes
  8.50% due 4/01/08(1)............................        1,000      1,005,000
 Interlake Corp.
  Sr. Subordinated Debentures
  12.13% due 3/01/02..............................        2,000      2,060,000
 Trident Automotive PLC
  Sr. Subordinated Notes
  10.00% due 12/15/05(1)..........................        1,000      1,035,000
 Wavetek Corp.
  Sr. Subordinated Notes
  10.13% due 6/15/07..............................        2,000      2,080,000
                                                                  ------------
                                                                     6,180,000
                                                                  ------------
MEDIA--3.0%
 Diva Systems Corp.
  Sr. Disc. Notes
  zero coupon due 3/01/08(1)(2)(6)................        1,750        962,500
 Knology Holdings, Inc.
  Sr. Disc. Notes
  zero coupon due 10/15/07(2).....................        2,500      1,500,000
 SFX Entertainment, Inc.
  Sr. Subordinated Notes
  9.13% due 2/01/08(1)............................        2,000      1,970,000
 Source Media, Inc.
  Sr. Notes
  12.00% due 11/01/04(1)..........................        1,000        995,000
                                                                  ------------
                                                                     5,427,500
                                                                  ------------
METALS & MINING--5.7%
 Acme Metals, Inc.
  Sr. Notes
  10.88% due 12/15/07(1)..........................        1,000      1,035,000
 Acme Metals, Inc.
  Sr. Notes
  12.50% due 8/01/02..............................        1,500      1,603,125
 Ameristeel Corp.
  Sr. Notes
  8.75% due 4/15/08(1)............................        1,500      1,515,000
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
METALS & MINING (CONTINUED)
 Kaiser Aluminum & Chemical Corp.
  Sr. Subordinated Notes
  12.75% due 2/01/03...............................    $    1,500   $  1,599,375
 Newcor, Inc.
  Sr. Notes
  9.88% due 3/01/08(1).............................         1,000      1,012,500
 Renco Metals, Inc.
  Sr. Notes
  11.50% due 7/01/03...............................         2,000      2,130,000
 Westmin Resources Ltd
  Sr. Notes
  11.00% due 3/15/07...............................         1,400      1,604,750
                                                                    ------------
                                                                      10,499,750
                                                                    ------------
OFFICE PRODUCTS--0.9%
 American Pad & Paper Co.
  Sr. Subordinated Notes, Series B
  13.00% due 11/15/05..............................         1,600      1,616,000
                                                                    ------------
PAPER PRODUCTS--1.0%
 Florida Coast Paper Co. LLC
  First Mortgage Notes, Series B
  12.75% due 6/01/03...............................         1,750      1,872,500
                                                                    ------------
RETAIL--1.1%
 Commemorative Brands, Inc.
  Sr. Subordinated Notes
  11.00% due 1/15/07...............................         1,000      1,022,500
 Electronic Retailing Systems International
  Sr. Disc. Notes
 zero coupon due 2/01/04(2)........................         1,000        580,000
 Jumbo Sports, Inc.
 Subordinated Notes
 4.25% due 11/01/00................................           900        360,000
                                                                    ------------
                                                                       1,962,500
                                                                    ------------
SHIPPING--5.2%
 Alpha Shipping PLC
 Sr. Notes
 9.50% due 2/15/08(1)..............................           750        725,625
 Ermis Maritime Holdings Ltd.
 First Preferred Ship
  Mortgage Notes
 12.50% due 3/15/06(1)(6)..........................         1,363      1,503,048
 First Wave Marine, Inc.
 Sr. Notes
 11.00% due 2/01/08................................         1,225      1,270,938
</TABLE>
 
                                       21
<PAGE>
 
 SUNAMERICA HIGH INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
CORPORATE BONDS & NOTES (CONTINUED)
SHIPPING (CONTINUED)
 Golden Ocean Group Ltd.
 Sr. Notes
 10.00% due 8/31/01(1)(6)..........................        $3,750   $  2,873,437
 Panoceanic Bulk Carriers Ltd.
 First Preferred Ship Mortgage Notes
 12.00% due 12/15/07(1)............................         1,000        977,500
 Stena AB
 Sr. Notes
 10.50% due 12/15/05...............................         2,000      2,180,000
                                                                    ------------
                                                                       9,530,548
                                                                    ------------
STEEL--1.6%
 GS Technologies Operating, Inc.
 Guaranteed Sr. Notes
 12.00% due 9/01/04................................         1,500      1,668,750
 International Utility Structures, Inc.
 Sr. Subordinated Notes
 10.75% due 2/01/08(1).............................         1,250      1,303,125
                                                                    ------------
                                                                       2,971,875
                                                                    ------------
SUPERMARKETS--1.2%
 Jitney Jungle Stores America, Inc.
 Sr. Notes
 12.00% due 3/01/06................................         2,000      2,280,000
                                                                    ------------
TELECOMMUNICATIONS--13.9%
 American Communications Services, Inc.
 Sr. Disc. Notes
 zero coupon due 11/01/05(2).......................         1,500      1,278,750
 American Mobile Satellite Corp.
 Sr. Notes
 12.25% due 4/01/08(1)(6)..........................         1,000      1,040,000
 Covad Communications Group, Inc.
 Sr. Disc. Notes
  zero coupon due 3/15/08(1)(2)(6).................         2,000      1,050,000
 DTI Holdings, Inc.
 Sr. Disc. Notes
 zero coupon due 3/01/08(2)(6).....................         2,750      1,601,875
 Econophone, Inc.
 Sr. Disc. Notes
 13.50% due 7/15/07(1)(6)..........................         2,000      2,257,500
 Hermes Europe Railtel BV
 Sr. Notes
 11.50% due 8/15/07(1).............................         1,000      1,132,500
 ICG Holdings, Inc.
 Sr. Disc. Notes
 11.63% due 3/15/07(1).............................         2,250      1,642,500
 IDT Corp.
 Sr. Notes
 8.75% due 2/15/06(1)..............................         1,000        998,750
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
TELECOMMUNICATIONS (CONTINUED)
 KMC Telecom Holdings, Inc.
 Sr. Disc. Notes
 zero coupon due 2/15/08(1)(2)(6)..................        $4,000   $  2,380,000
 MGC Communications, Inc.
 Sr. Secured Notes, Series B
 13.00% due 10/01/04(1)(6).........................         1,500      1,560,000
 Orbcomm Global LP
 Sr. Notes
 14.00% due 8/15/04................................         1,600      1,868,000
 Orion Network Systems, Inc.
 Sr. Disc. Notes
 zero coupon due 1/15/07(2)........................         2,500      1,918,750
 Primus Telecommunications Group
 Sr. Notes
 11.75% due 8/01/04(6).............................         1,000      1,117,500
 USN Communications, Inc.
 Sr. Disc. Notes, Series B
 zero coupon due 8/15/04(2)........................         2,500      2,050,000
 Vialog Corp.
 Sr. Notes, Series B
 12.75% due 11/15/01(1)(6).........................         1,500      1,565,220
 Viatel, Inc.
 Sr. Disc. Notes
 zero coupon due 1/15/05(2)........................         2,000      1,917,500
                                                                    ------------
                                                                      25,378,845
                                                                    ------------
TRANSPORTATION--0.6%
 Travelcenters of America, Inc.
 Sr. Subordinated Notes
 10.25% due 4/01/07................................         1,000      1,063,750
                                                                    ------------
TOTAL CORPORATE BONDS & NOTES
 (cost $156,824,867)...............................                  157,476,033
                                                                    ------------
FOREIGN BONDS & NOTES--9.1%
BROADCASTING--1.2%
 Central European Media
  Enterprises Ltd.
  Sr. Notes
  9.38% due 8/15/04................................         2,250      2,230,897
                                                                    ------------
CABLE--0.6%
 Australis Holdings Property Ltd.
  Sr. Disc. Notes
  zero coupon due 11/01/02(2)......................         1,000        349,990
 Comcast UK Cable Partners Ltd.
  Sr. Disc. Notes
  zero coupon due 11/15/07(2)......................         1,000        830,000
                                                                    ------------
                                                                       1,179,990
                                                                    ------------
</TABLE>
 
                                       22
<PAGE>
 
 SUNAMERICA HIGH INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                      PRINCIPAL
                                                        AMOUNT        VALUE
               SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                 <C>            <C>
 
- -------------------------------------------------------------------------------
FOREIGN BONDS & NOTES (CONTINUED)
CELLULAR--0.8%
 Occidente Y Caribe Celular SA
  Sr. Disc. Notes, Series B
  zero coupon due 3/15/04(2).......................      $2,000    $  1,535,000
                                                                   ------------
OIL & GAS--1.2%
 Statia Terms International
  Mortgage Notes, Series B
  11.75% due 11/15/03(1)...........................       2,000       2,127,500
                                                                   ------------
PAGING--0.8%
 Paging Network Do Brasil SA
  Sr. Notes
  13.50% due 6/06/05...............................       1,400       1,424,500
                                                                   ------------
PAPER PRODUCTS--0.5%
 Doman Industries Ltd.
  Sr. Notes
  8.75% due 3/15/04................................       1,000         997,500
                                                                   ------------
SHIPPING--0.6%
 Pegasus Shipping Ltd.
  Sr. Mortgage Notes
  11.88% due 11/15/04(1)...........................       1,000       1,007,500
                                                                   ------------
TELECOMMUNICATIONS--3.4%
 Colt Telecom Group PLC
  Sr. Disc. Notes
  zero coupon due 12/15/06(2)......................       1,000         781,250
 Ionica PLC
  Sr. Disc. Notes
  zero coupon due 5/01/07(2)(6)....................       3,250       1,336,562
 Ionica PLC
  Sr. Notes
  13.50% due 8/15/06...............................         500         406,250
 Poland Telecom Finance BV
  Sr. Notes
  14.00% due 12/01/07(1)(6)........................       1,000       1,070,000
 RSL Communications Ltd.
  Sr. Notes
  12.25% due 11/15/06..............................         675         757,688
 RSL Communications Ltd.
  Sr. Notes
  12.25% due 11/15/06..............................       1,575       1,795,500
                                                                   ------------
                                                                      6,147,250
                                                                   ------------
TOTAL FOREIGN BONDS & NOTES
 (cost $16,963,009)................................                  16,650,137
                                                                   ------------
</TABLE>
 
<TABLE>
<CAPTION>
 
                                                          SHARES/      VALUE
                  SECURITY DESCRIPTION                    WARRANTS    (NOTE 2)
<S>                                                      <C>        <C>
 
PREFERRED STOCK--3.7%
CABLE--0.8%
 CSC Holdings, Inc. 11.13%(3)..........................      13,205 $  1,511,969
                                                                    ------------
FINANCIAL SERVICES--1.2%
 Bankunited Financial Corp. 10.25%.....................       2,000    2,120,000
                                                                    ------------
MEDIA--0.9%
 Echostar Communications Corp. 6.75%...................      30,000    1,740,000
                                                                    ------------
TELECOMMUNICATIONS--0.8%
 Intermedia Communications, Inc. 7.00%(1)..............      10,000      353,750
 IXC Communications, Inc. 6.75%(1).....................      12,000      619,500
 Nextlink Communications, Inc. 6.50%(1)................      10,000      483,750
                                                                    ------------
                                                                       1,457,000
                                                                    ------------
TOTAL PREFERRED STOCK
 (cost $6,222,223).....................................                6,828,969
                                                                    ------------
COMMON STOCK--0.2%
CELLULAR--0.2%
 Microcell Telecommunications+(1)......................      34,298      308,682
                                                                    ------------
GAMING--0.0%
 Capital Gaming International, Inc.+(4)................          77            1
                                                                    ------------
MEDIA--0.0%
 TMM, Inc.+............................................   1,250,000       15,000
                                                                    ------------
PAGING--0.0%
 Paging Do Brazil Holdings Co. LLC(4)..................       1,400           14
                                                                    ------------
TOTAL COMMON STOCK
 (cost $1,255,100).....................................                  323,697
                                                                    ------------
WARRANTS--0.4%+
BROADCASTING--0.0%
 Benedek Communications Corp.(4).......................      12,500       31,250
                                                                    ------------
CABLE--0.0%
 Australis Holdings Property Ltd.(1)...................       1,000            0
 UIH Australia Pacific, Inc.(4)........................       1,000           10
 United International Holdings, Inc....................       3,000       36,000
                                                                    ------------
                                                                          36,010
                                                                    ------------
CELLULAR--0.1%
 Cellnet Data Systems, Inc.(1).........................       1,000       50,000
 Clearnet Communications, Inc..........................       4,950       29,700
 International Wireless Communication(1)(4)............       3,250            0
 Occidente Y Caribe Celular SA(1)(4)...................       8,000       28,000
                                                                    ------------
                                                                         107,700
                                                                    ------------
</TABLE>
 
                                       23
<PAGE>
 
 SUNAMERICA HIGH INCOME FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
 
 
                                                                       VALUE
                   SECURITY DESCRIPTION                    WARRANTS   (NOTE 2)
<S>                                                        <C>      <C>
 
- --------------------------------------------------------------------------------
WARRANTS (CONTINUED)
GAMING--0.0%
 Capital Gaming International, Inc.(4)...................   45,500  $        228
 Fitzgerald Gaming Corp.(1)(4)...........................    2,000            20
                                                                    ------------
                                                                             248
                                                                    ------------
MEDIA--0.0%
 Knology Holdings, Inc.(1)(4)............................    4,500        11,250
                                                                    ------------
RETAIL--0.0%
 Electronic Retailing Systems International..............    1,000        40,000
                                                                    ------------
SHIPPING--0.0%
 Golden Ocean Group Ltd. ................................    2,500        10,000
                                                                    ------------
TELECOMMUNICATIONS--0.3%
 Hyperion Telecommunications, Inc.(1)....................    3,000       210,000
 Ionica PLC..............................................    1,000        40,000
 MGC Communications, Inc.(1).............................    1,500        52,500
 Primus Telecommunications Group, Inc....................    1,000        32,000
 Vialog Corp.............................................    1,500        89,998
                                                                    ------------
                                                                         424,498
                                                                    ------------
TOTAL WARRANTS
 (cost $588,677).........................................                660,956
                                                                    ------------
TOTAL INVESTMENT SECURITIES--99.7%
 (cost $181,853,876).....................................            181,939,792
                                                                    ------------
</TABLE>
<TABLE>
<CAPTION>
 
                                                      PRINCIPAL
                                                        AMOUNT        VALUE
               SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                 <C>            <C>
 
SHORT-TERM SECURITIES--0.8%
PAPER PRODUCTS--0.8%
 Stone Container Corp.
  Sr. Notes
  11.88% due 12/01/98
  (cost $1,576,875)...............................      $1,500     $  1,545,000
                                                                   ------------
TOTAL INVESTMENTS--
 (cost $183,430,751*).............................       100.5%     183,484,792
Liabilities in excess of other assets.............        (0.5)        (934,441)
                                                        ------     ------------
NET ASSETS--                                             100.0%    $182,550,351
                                                        ======     ============
</TABLE>
- -------
* See Note 5
+ Non-income producing security
(1) Resale restricted to qualified institutional buyers
(2) Represents a zero coupon bond which will convert to an interest-bearing
    security at a later date
(3) PIK ("Payment-in-Kind") payment made with additional securities in lieu of
    cash
(4) Fair valued security; see Note 2
(5) Variable rate security; rate as of March 31, 1998
(6) Bond issued as part of a unit which includes an equity component
(7) Bond in default
 
See Notes to Financial Statements
 
                                      24
<PAGE>
 
 SUNAMERICA TAX EXEMPT INSURED FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
MUNICIPAL BONDS--98.0%
ALASKA--1.8%
 Alaska State Housing Finance Corp.,
 7.50% due 12/01/15+...............................      $1,975     $  2,030,675
                                                                    ------------
ARIZONA--3.3%
 Northern Arizona University, Revenue,
 6.50% due 6/01/10+................................       1,845        2,159,296
 Pima County, Arizona Unified School District
  Number 1, General Obligation,
 7.50% due 7/01/10+................................       1,200        1,513,968
                                                                    ------------
                                                                       3,673,264
                                                                    ------------
ARKANSAS--0.1%
 Arkansas State Development Finance Authority,
  Single Family Mortgage Revenue,
 9.00% due 6/01/14+................................         125          127,714
 Arkansas State Development Finance Authority,
  Single Family Mortgage Revenue, Series A,
 9.38% due 8/01/14+................................           5            5,045
                                                                    ------------
                                                                         132,759
                                                                    ------------
CALIFORNIA--4.9%
 Anaheim, California Public Financing Authority,
  Revenue, Series A,
 zero coupon due 9/01/18+..........................       1,500          519,660
 California Housing Finance Agency, Home Mortgage
  Revenue, Series A,
 8.13% due 8/01/19+................................         770          790,875
 Long Beach, California Harbor Revenue Refunding,
  Series A,
 6.00% due 5/15/17+................................       1,000        1,112,950
 San Francisco, California City & County
  Redevelopment Agency, Lease Revenue,
 6.75% due 7/01/15+................................       1,000        1,134,110
 San Jose, California Redevelopment Agency, Tax
  Allocation,
 6.00% due 8/01/11+................................       1,700        1,922,411
                                                                    ------------
                                                                       5,480,006
                                                                    ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
COLORADO--4.2%
 Colorado Housing Finance Authority, Single Family
  Revenue, Series C,
 9.38% due 3/01/12+................................      $   65     $     66,399
 Highlands Ranch Metropolitan District, Colorado
  General Obligation,
 6.50% due 6/15/09+................................       1,960        2,277,461
 Jefferson County, Colorado School District R001,
  Refunding,
 6.50% due 12/15/11+...............................       2,000        2,358,340
                                                                    ------------
                                                                       4,702,200
                                                                    ------------
GEORGIA--2.8%
 Municipal Electric Authority, Georgia Special
  Obligation, Fifth Crossover Series,
 6.40% due 1/01/09+................................       1,250        1,427,625
 Municipal Electric Authority, Georgia Special
  Obligation, Fifth Crossover Series,
 6.40% due 1/01/13+................................       1,500        1,734,195
                                                                    ------------
                                                                       3,161,820
                                                                    ------------
IDAHO--0.9%
 Idaho Housing & Finance Association, Single Family
  Mortgage,
 5.63% due 7/01/15+................................       1,000        1,018,690
                                                                    ------------
ILLINOIS--10.9%
 Chicago Illinois Board Of Education, General
  Obligation,
 6.75% due 12/01/11+...............................       2,000        2,389,640
 Cook & Du Page Counties, Illinois High School,
  District Number 210, General Obligation,
 zero coupon due 12/01/12+.........................       1,600          764,432
 Cook County, Illinois Community College, District
  Number 508,
 7.70% due 12/01/07+...............................       4,000        4,976,960
 Illinois Health Facilities Authority, Lutheran
  General Health System,
 7.00% due 4/01/08+................................       3,400        4,015,298
                                                                    ------------
                                                                      12,146,330
                                                                    ------------
</TABLE>
 
                                       25
<PAGE>
 
 SUNAMERICA TAX EXEMPT INSURED FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
MUNICIPAL BONDS (CONTINUED)
INDIANA--1.3%
 Indiana State Housing Finance Authority, Multi-
  Unit Mortgage Program, Series A,
 9.00% due 1/01/14+................................      $1,470     $  1,475,998
                                                                    ------------
KENTUCKY--5.0%
 Kenton County Kentucky Airport, Board Revenue
  Refunding, Cincinnati/Northern
  Kentucky, Series A,
 6.30% due 3/01/15+................................       1,500        1,645,605
 Louisville & Jefferson County, Kentucky Regional
  Airport Authority, Series A,
 6.50% due 7/01/17+................................       3,500        3,942,925
                                                                    ------------
                                                                       5,588,530
                                                                    ------------
MARYLAND--0.1%
 Maryland State Community Development
  Administration, Multi-Family Housing Revenue,
  1985 Series B,
 8.75% due 5/15/12+................................         110          110,482
                                                                    ------------
MASSACHUSETTS--4.4%
 Massachusetts State Housing Finance Agency,
  Insured Rental, Series A,
 6.60% due 7/01/14+................................       1,000        1,063,200
 Massachusetts State Port Authority, Revenue,
  Series A,
 5.00% due 7/01/27.................................       2,000        1,922,620
 Massachusetts State Water Resources Authority,
  Refunding General, Series D,
 5.00% due 8/01/24+................................       2,000        1,934,480
                                                                    ------------
                                                                       4,920,300
                                                                    ------------
MICHIGAN--1.9%
 Michigan Municipal Bond Authority, Revenue Capital
  Appreciation, Local Government Loan,
 zero coupon due 5/01/17+..........................       2,875        1,071,398
 Michigan Municipal Bond Authority, Revenue Capital
  Appreciation, Local Government Loan,
 zero coupon due 5/01/16+..........................       2,735        1,079,012
                                                                    ------------
                                                                       2,150,410
                                                                    ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
MISSOURI--6.2%
 Missouri State Housing Development Commission,
  Insured, Single Family Mortgage Revenue,
 9.38% due 4/01/16+................................      $   45     $     48,432
 Sikeston, Missouri Electric, Revenue,
 6.20% due 6/01/10+................................       6,000        6,856,260
                                                                    ------------
                                                                       6,904,692
                                                                    ------------
NEVADA--4.5%
 Nevada Housing Division, Single Family Mortgage
  Revenue, Series A,
 zero coupon due 4/01/16+(1).......................       4,945        5,009,285
                                                                    ------------
NEW JERSEY--1.6%
 New Jersey State Transportation Trust Fund
  Authority, Transportation Systems Revenue, Series
  B,
 6.50% due 6/15/10+................................       1,500        1,756,110
                                                                    ------------
NEW MEXICO--1.1%
 Bernalillo County, New Mexico Gross Receipts Tax,
  Revenue,
 5.75% due 10/01/17................................       1,000        1,094,050
 New Mexico Mortgage Finance Authority, Single
  Family Mortgage Revenue, Series C,
 8.63% due 7/01/17+................................         170          175,494
                                                                    ------------
                                                                       1,269,544
                                                                    ------------
NEW YORK--11.7%
 New York City, New York, Prerefunding, General
  Obligation, Series K,
 6.25% due 4/01/11.................................       1,000        1,087,550
 New York State Dormitory Authority, Lease Revenue,
  State University Dormitory Facilities Issue,
  Series A,
 6.00% due 7/01/09+................................       1,970        2,204,430
 New York State Medical Care Facilities Finance
  Agency, Revenue, New York Hospital, Mortgage A,
 6.75% due 8/15/14+................................       2,850        3,296,623
 Niagara Falls, New York,
 General Obligation,
 7.50% due 3/01/14+................................         555          712,453
</TABLE>
 
                                       26
<PAGE>
 
 SUNAMERICA TAX EXEMPT INSURED FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
MUNICIPAL BONDS (CONTINUED)
NEW YORK (CONTINUED)
 Niagara Falls, New York,
  General Obligation,
 7.50% due 3/01/13+................................      $  445     $    569,151
 Port Authority of New York & New Jersey Special
  Obligation, Revenue, JFK International Air
  Terminal-6,
 6.25% due 12/01/10+...............................       1,500        1,702,995
 Port Authority of New York & New Jersey Special
  Obligation, Revenue, JFK International Air
  Terminal-6,
 6.25% due 12/01/11+...............................       3,000        3,415,860
                                                                    ------------
                                                                      12,989,062
                                                                    ------------
NORTH DAKOTA--0.5%
 North Dakota State Housing Finance Agency, Single
  Family Mortgage Revenue, Series A,
 7.38% due 7/01/17+................................         545          556,625
                                                                    ------------
OHIO--4.6%
 Lucas County, Ohio Hospital Revenue, St. Vincent
  Medical Center,
 6.50% due 8/15/07+................................       3,500        3,843,140
 Woodridge, Ohio Local School District, General
  Obligation,
 6.80% due 12/01/14+...............................       1,000        1,215,650
                                                                    ------------
                                                                       5,058,790
                                                                    ------------
OKLAHOMA--1.6%
 Grand River Dam Authority Oklahoma Revenue
  Refunding,
 6.25% due 6/01/11+................................       1,500        1,724,625
                                                                    ------------
PENNSYLVANIA--0.1%
 Pennsylvania Housing Finance Agency, Multi-Family
  Mortgage,
 9.38% due 8/01/28+................................         120          121,783
                                                                    ------------
PUERTO RICO--1.9%
 Puerto Rico Commonwealth Highway & Transportation
  Authority, Revenue, Series A,
 5.50% due 7/01/13+................................       2,000        2,147,760
                                                                    ------------
RHODE ISLAND--0.8%
 Rhode Island Housing & Mortgage Finance Corp.,
  Revenue,
 8.38% due 10/01/16+...............................         835          852,410
                                                                    ------------
</TABLE>
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
SOUTH DAKOTA--2.2%
 South Dakota State Health And Educational
  Facilities Authority Revenue,
 6.25% due 7/01/10+................................      $2,120     $  2,406,242
                                                                    ------------
TEXAS--12.0%
 Alliance Airport Authority, Inc., Texas Special
  Facilities Revenue,
 6.38% due 4/01/21.................................       2,000        2,158,780
 Bexar County, Texas Health Facilities Development
  Corp., Hospital Revenue,
 6.75% due 8/15/19+................................       4,000        4,599,480
 Harris County, Texas Hospital District Mortgage,
  Revenue,
 7.40% due 2/15/10+................................       2,500        3,031,375
 Houston, Texas Water Conveyance Systems Contract,
  Certificates of Participation,
 6.13% due 12/15/08+...............................       1,250        1,416,425
 Houston, Texas Water Conveyance Systems Contract,
  Certificates of Participation,
 6.13% due 12/15/09+...............................       1,000        1,133,850
 San Antonio, Texas, Hotel Occupancy, Revenue,
 zero coupon due 8/15/17+..........................       2,700          976,401
                                                                    ------------
                                                                      13,316,311
                                                                    ------------
UTAH--0.0%
 Utah State Housing Finance Agency, Single Family
  Mortgage, Series D,
 7.50% due 7/01/16+................................          20           20,198
                                                                    ------------
VIRGINIA--0.9%
 Virginia State Housing Development Authority,
  Multi- Family, Series H,
 5.50% due 5/01/13+................................       1,000        1,026,040
                                                                    ------------
WASHINGTON--3.8%
 Washington State Housing Finance Commission,
  Multi-Family Mortgage Revenue, Series A,
 9.13% due 7/01/10+................................         380          403,370
 Washington State, Series B, General Obligation,
 6.00% due 6/01/11.................................       3,400        3,819,356
                                                                    ------------
                                                                       4,222,726
                                                                    ------------
</TABLE>
 
 
                                       27
<PAGE>
 
 SUNAMERICA TAX EXEMPT INSURED FUND
 PORTFOLIO OF INVESTMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
MUNICIPAL BONDS (CONTINUED)
WEST VIRGINIA--2.8%
 West Virginia State Housing Development Fund,
  Series A,
 7.25% due 5/01/17+................................      $3,000     $  3,090,030
                                                                    ------------
WISCONSIN--0.1%
 Wisconsin Housing & Economic Development
  Authority, Homeownership Revenue, Issue III,
 9.13% due 6/01/05+................................          65           66,157
                                                                    ------------
TOTAL INVESTMENT SECURITIES--98.0%
 (cost $100,416,712*)..............................                  109,129,854
                                                                    ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                       PRINCIPAL
                                                         AMOUNT        VALUE
                SECURITY DESCRIPTION                 (IN THOUSANDS)   (NOTE 2)
<S>                                                  <C>            <C>
 
- --------------------------------------------------------------------------------
SHORT-TERM SECURITIES--0.6%
NEW JERSEY--0.6%
 New Jersey Economic Development Authority,
  Water Facilities Revenue,
  3.55% due 4/01/98(2)
  (cost $700,000)..................................      $  700     $    700,000
                                                                    ------------
TOTAL INVESTMENTS--
 (cost $101,116,712*)..............................        98.6%     109,829,854
Other assets less liabilities......................         1.4        1,566,755
                                                         ------     ------------
NET ASSETS--                                              100.0%    $111,396,609
                                                         ======     ============
</TABLE>
- -------
* See Note 5
+ All or part of this security is insured by Government National Mortgage
  Association ("GNMA"), Financial Security Assurance ("FSA"), Federal Housing
  Administration ("FHA"), Financial Guarantee Insurance Corp. ("FGIC"),
  Municipal Bond Insurance Association ("MBIA"), or AMBAC ($99,047,499 or
  88.9% of net assets)
(1) Represents a zero coupon bond which will convert to an interest-bearing
    security at a later date
(2) Variable rate security; maturity date reflects next reset date
See Notes to Financial Statements
 
                                      28
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998
Note 1. Organization
 
  SunAmerica Income Funds is an open-end diversified management investment
  company organized as a Massachusetts business trust (the "Trust"). It
  currently consists of five different investment series (each, a "Fund" and
  collectively, the "Funds"). Each Fund is a separate series of the Trust
  with distinct investment objectives and/or strategies. Each Fund is managed
  by SunAmerica Asset Management Corp. (the "Adviser" or "SAAMCo"), an
  indirect wholly owned subsidiary of SunAmerica Inc. An investor may invest
  in one or more of the following Funds: SunAmerica U.S. Government
  Securities Fund, SunAmerica Federal Securities Fund, SunAmerica Diversified
  Income Fund, SunAmerica High Income Fund and SunAmerica Tax Exempt Insured
  Fund. The Funds are considered to be separate entities for financial and
  tax reporting purposes. The investment objectives for each of the Funds are
  as follows:
 
  U.S. Government Securities Fund seeks high current income consistent with
  relative safety of capital by investing primarily in securities issued or
  guaranteed by the U.S. government, or any agency or instrumentality
  thereof.
 
  Federal Securities Fund seeks current income, with capital appreciation as
  a secondary objective, by investing primarily in securities issued or
  guaranteed by the U.S. government or any agency or instrumentality thereof.
 
  Diversified Income Fund seeks a high level of current income consistent
  with moderate investment risk, with preservation of capital as a secondary
  objective.
 
  High Income Fund seeks maximum current income by investing primarily in
  high-yield, high-risk corporate bonds.
 
  Tax Exempt Insured Fund seeks a high level of current income exempt from
  Federal income taxes as is consistent with preservation of capital.
 
  Each Fund currently offers two classes of shares. Class A shares are
  offered at net asset value per share plus an initial sales charge. Class B
  shares are offered without an initial sales charge, although a declining
  contingent sales charge may be imposed on redemptions made within six years
  of purchase. High Income Fund also offers Class C shares. Class C shares
  are offered at net asset value, although they may be subject to a
  contingent deferred sales charge on redemptions made within one year of
  purchase. Additionally, any purchases of Class A shares in excess of
  $1,000,000 will be purchased at net asset value but will be subject to a
  contingent deferred sales charge on redemptions made within one year of
  purchase. Class B shares of each Fund convert automatically to Class A
  shares on the first business day of the month following the seventh
  anniversary of the issuance of such Class B shares and at such time will be
  subject to the lower distribution fee applicable to Class A shares. Each
  class of shares bears the same voting, dividend, liquidation and other
  rights and conditions and each makes distribution and account maintenance
  and service fee payments under a distribution plan pursuant to Rule 12b-1
  under the Investment Company Act of 1940 (the "1940 Act") except that Class
  B and Class C shares are subject to higher distribution fee rates.
 
                                       29
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
Note 2. Significant Accounting Policies
 
  The preparation of financial statements in accordance with generally
  accepted accounting principles requires management to make estimates and
  assumptions that affect the reported amounts and disclosures in the
  financial statements. Actual results could differ from these estimates.
 
  The following is a summary of the significant accounting policies followed
  by the Funds in the preparation of their financial statements:
 
  SECURITY VALUATIONS: Securities that are actively traded in the over-the-
  counter market, including listed securities for which the primary market is
  believed by the Adviser to be over-the-counter, are valued at the quoted
  bid price provided by principal market makers. Securities listed on the New
  York Stock Exchange ("NYSE") or other national securities exchanges, are
  valued on the basis of the last sale price on the exchange on which they
  are primarily traded. If there is no sale on that day, then securities are
  valued at the closing bid price on the NYSE or other primary exchange for
  that day. However, if the last sale price on the NYSE is different than the
  last sale price on any other exchange, the NYSE price is used. Securities
  that are traded on foreign exchanges are ordinarily valued at the last
  quoted sales price available before the time when the assets are valued. If
  a securities price is available from more than one foreign exchange, a Fund
  uses the exchange that is the primary market for the security. Options
  traded on national securities exchanges are valued as of the close of the
  exchange on which they are traded. Futures and options traded on
  commodities exchanges are valued at their last sale price as of the close
  of such exchange. The Funds may make use of a pricing service in the
  determination of their net asset values. The preceding procedures need not
  be used to determine the value of debt securities owned by a Fund if, in
  the opinion of the Trustees, some other method would more accurately
  reflect the fair market value of such debt securities in quantities owned
  by such Fund. Securities for which market quotations are not readily
  available and other assets are valued at fair value as determined pursuant
  to procedures adopted in good faith by the Trustees. Short-term investments
  which mature in less than 60 days are valued at amortized cost, if their
  original maturity was 60 days or less, or by amortizing their value on the
  61st day prior to maturity, if their original term to maturity exceeded 60
  days.
 
  REPURCHASE AGREEMENTS: Pursuant to exemptive relief granted by the
  Securities and Exchange Commission, the Funds are permitted to participate
  in joint repurchase agreement transactions with other affiliated investment
  companies. The Funds, along with other affiliated registered investment
  companies, transfer uninvested cash balances into a single joint account,
  the daily aggregate balance of which is invested in one or more repurchase
  agreements collateralized by U.S. Treasury or federal agency obligations.
  The Funds' custodian takes possession of the collateral pledged for
  investments in repurchase agreements. The underlying collateral is valued
  daily on a mark to market basis to ensure that the value, including accrued
  interest, is at least equal to the repurchase price. In the event of
  default of the obligation to repurchase, a Fund has the right to liquidate
  the collateral and apply the proceeds in satisfaction of the obligation. If
  the seller defaults and the value of the collateral declines or if
  bankruptcy proceedings are commenced with respect to the seller of the
  security, realization of the collateral by the Fund may be delayed or
  limited.
 
                                       30
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
  As of March 31, 1998 the U.S. Government Securities Fund, Federal
  Securities Fund and Diversified Income Fund had a 28.1%, 9.2% and 1.8%
  undivided interest, respectively, which represented $27,473,000, $9,030,000
  and $1,722,000, respectively, in principal amount in a joint repurchase
  agreement with PaineWebber, Inc. As of such date, the repurchase agreement
  in the joint account and the collateral therefore were as follows:
 
  PaineWebber, Inc. Repurchase Agreement, 5.75% dated 3/31/98, in the
  principal amount of $97,641,000, repurchase price $97,656,595, due 4/01/98,
  collateralized by $50,000,000 U.S. Treasury Bonds 6.375% due 1/15/99 and
  $47,885,000 U.S. Treasury Notes 6.25% due 6/30/98, approximate aggregate
  value $99,682,537.
 
  SECURITIES TRANSACTIONS, INVESTMENT INCOME, DIVIDENDS AND DISTRIBUTIONS TO
  SHAREHOLDERS: Securities transactions are recorded on a trade date basis.
  Realized gains and losses on sales of investments are calculated on the
  identified cost basis. Interest income is recorded on the accrual basis;
  dividend income is recorded on the ex-dividend date. The Funds do not
  amortize market premiums (except for Tax Exempt Insured Fund) or accrete
  market discounts (except for Diversified Income Fund and High Income Fund)
  except original issue discounts for which amortization is required for
  federal income tax purposes.
 
  Net investment income, other than class specific expenses, and realized and
  unrealized gains and losses are allocated daily to each class of shares
  based upon the relative net asset value of outstanding shares (or the value
  of dividend-eligible shares, as appropriate) of each class of shares at the
  beginning of the day (after adjusting for the current capital share
  activity of the respective class).
 
  Expenses common to all funds are allocated among the Funds based upon their
  relative net asset values or other appropriate allocation methods.
 
  Dividends from net investment income are accrued daily and paid monthly.
  Capital gain distributions, if any, are paid annually. The amount of
  dividends and distributions from net investment income and net realized
  capital gains are determined in accordance with federal income tax
  regulations, which may differ from generally accepted accounting
  principles. These "book/tax" differences are either considered temporary or
  permanent in nature. To the extent these differences are permanent in
  nature, such amounts are reclassified within the capital accounts based on
  their federal tax-basis treatment; temporary differences do not require
  reclassification. Net investment income/loss, net realized gain/loss, and
  net assets are not affected.
 
                                       31
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
  For the year ended March 31, 1998, the following reclassifications arising
  from book/tax differences were primarily the result of market discount and
  paydown losses.
 
<TABLE>
<CAPTION>
                                  ACCUMULATED       ACCUMULATED
                               UNDISTRIBUTED NET UNDISTRIBUTED NET
                                  INVESTMENT         REALIZED        PAID-IN
                                 INCOME/(LOSS)      GAIN/(LOSS)      CAPITAL
                               ----------------- ----------------- -----------
<S>                            <C>               <C>               <C>
  U.S. Government Securities
   Fund.......................    $(3,941,450)      $3,941,450     $      --
  Federal Securities Fund.....       (137,988)         137,988            --
  Diversified Income Fund.....         (4,627)           4,627            --
  High Income Fund............         15,700        3,599,690      (3,615,390)
  Tax Exempt Insured Fund.....           --               --              --
</TABLE>
 
  INVESTMENT SECURITIES LOANED: During the six months ended March 31, 1998,
  U.S. Government Securities Fund and Federal Securities Fund participated in
  securities lending with qualified brokers. In lending portfolio securities
  to brokers the Funds receive cash as collateral against the loaned
  securities, which must be maintained at not less than 102% of the market
  value of the loaned securities during the period of the loan. The Funds may
  use the cash collateral received to invest in short-term investments which
  earn interest income or to cover bank overdrafts. Any interest earned from
  the investment of the collateral is recorded by the Funds net of the
  portion of interest that is rebated to the borrowing broker. If the amounts
  are used to cover bank overdrafts, the broker rebates incurred are
  reflected as interest expense on the Statement of Operations. As with other
  extensions of credit, should the borrower of the securities fail
  financially, the Funds may bear the risk of delay in recovery or may be
  subject to replacing the loaned securities by purchasing them with the cash
  collateral held, which may be less than 100% of the market value of such
  securities at the time of replacement.
 
  At March 31, 1998, U.S. Government Securities Fund has loaned securities
  having a value of $23,125,356 and held cash collateral of $23,543,750 for
  these loans. The value of the collateral was sufficient at the time the
  loan agreements were entered into. As a result of an increase in the market
  value of the loaned securities on the last business day of the fiscal year,
  the Fund was furnished with additional collateral on the following business
  day.
 
  FOREIGN CURRENCY TRANSLATION: The books and records of the Funds are
  maintained in U.S. dollars. Assets and liabilities denominated in foreign
  currencies and commitments under forward foreign currency contracts are
  translated into U.S. dollars at the mean of the quoted bid and asked prices
  of such currencies against the U.S. dollar.
 
  The Fund does not isolate that portion of the results of operations arising
  as a result of changes in the foreign exchange rates from the changes in
  the market prices of securities held at fiscal year-end. Similarly, the
  Fund does not isolate the effect of changes in foreign exchange rates from
  the changes in the market prices of portfolio securities sold during the
  year.
 
  Realized foreign exchange gains and losses on other assets and liabilities
  and change in unrealized foreign exchange gains and losses on other assets
  and liabilities include foreign exchange gains and losses from currency
  gains or losses realized between the trade and settlement dates of
  securities
 
                                       32
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
  transactions, the difference between the amounts of interest, dividends and
  foreign withholding taxes recorded on the Fund's books and the U.S. dollar
  equivalent amounts actually received or paid and changes in the unrealized
  foreign exchange gains and losses relating to other assets and liabilities
  arising as a result of changes in the exchange rate.
 
  FUTURES CONTRACTS: A futures contract is an agreement between two parties
  to buy and sell a financial instrument at a set price on a future date.
  Upon entering into such a contract the Funds are required to pledge to the
  broker an amount of cash or U.S. government securities equal to the minimum
  "initial margin" requirements of the exchange on which the futures contract
  is traded. The Funds' activities in futures contracts are for hedging
  purposes and are conducted through regulated exchanges which do not result
  in counterparty credit risks. A Fund's participation in the futures markets
  involves certain risks, including imperfect correlation between movements
  in the price of futures contracts and movements in the price of the
  securities hedged or used for cover. Pursuant to a contract the Funds agree
  to receive from or pay to the broker an amount of cash equal to the daily
  fluctuation in value of the contract. Such receipts or payments are known
  as "variation margin" and are recorded by the Funds as unrealized
  appreciation or depreciation. Futures contracts involve elements of risk in
  excess of the amount reflected in the Statement of Assets and Liabilities.
  When a contract is closed, the Funds record a realized gain or loss equal
  to the difference between the value of the contract at the time it was
  opened and the value at the time it was closed.
 
Note 3. Investment Advisory and Management Agreement, Distribution Agreement
and Service Agreement
 
  The Trust, on behalf of each Fund, has an Investment Advisory and
  Management Agreement (the "Agreement") with SAAMCo. Under the Agreement,
  SAAMCo provides continuous supervision of a Fund's portfolio and
  administers its corporate affairs, subject to general review by the
  Trustees. In connection therewith, SAAMCo furnishes the Funds with office
  facilities, maintains certain of the Funds' books and records, and pays the
  salaries and expenses of all personnel, including officers of the Funds,
  who are employees of SAAMCo and its affiliates.
 
  The Funds pay SAAMCo a monthly investment advisory and management fee
  calculated daily at the following annual percentages of each Fund's average
  daily net assets:
 
<TABLE>
<CAPTION>
                                                                    MANAGEMENT
                                                       ASSETS          FEES
                                                  ----------------- ----------
   <S>                                            <C>               <C>
   U.S. Government Securities Fund and High In-
    come Fund.................................... $0 - $200 million    0.75%
                                                     > $200 million    0.72%
                                                     > $400 million    0.55%
   Federal Securities Fund....................... $0 - $25  million    0.55%
                                                     > $25  million    0.50%
                                                     > $50  million    0.45%
   Diversified Income Fund....................... $0 - $350 million    0.65%
                                                     > $350 million    0.60%
   Tax Exempt Insured Fund....................... $0 - $350 million    0.50%
                                                     > $350 million    0.45%
</TABLE>
 
  For the period ended March 31, 1998, SAAMCo has agreed to voluntarily
  reimburse expenses of $3,859 on Class C of the High Income Fund.
 
                                      33
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
  The Trust, on behalf of each Fund, has a Distribution Agreement with
  SunAmerica Capital Services, Inc. ("SACS" or "Distributor"), an indirect
  wholly owned subsidiary of SunAmerica Inc. Each Fund, has adopted a
  Distribution Plan (the "Plan") in accordance with the provisions of Rule
  12b-1 under the 1940 Act. Rule 12b-1 under the 1940 Act permits an
  investment company directly or indirectly to pay expenses associated with
  the distribution of its shares ("distribution expenses") in accordance with
  a plan adopted by the investment company's board of trustees and approved
  by its shareholders. Pursuant to such rule, the Trustees and the
  shareholders of each class of shares of each Fund have adopted Distribution
  Plans, hereinafter referred to as the "Class A Plan," the "Class B Plan"
  and the "Class C Plan." In adopting the Class A Plan, the Class B Plan and
  the Class C Plan, the Trustees determined that there was a reasonable
  likelihood that each Plan would benefit the Trust and the shareholders of
  the respective class. The sales charge and distribution fees of a
  particular class will not be used to subsidize the sale of shares of any
  other class.
 
  Under the Class A Plan, Class B Plan and Class C Plan, the Distributor
  receives payments from a Fund at an annual rate of up to 0.10%, .75% and
  .75%, respectively, of average daily net assets of such Fund's Class A,
  Class B and Class C shares to compensate the Distributor and certain
  securities firms for providing sales and promotional activities for
  distributing that class of shares. The distribution costs for which the
  Distributor may be reimbursed out of such distribution fees include fees
  paid to broker-dealers that have sold Fund shares, commissions, and other
  expenses such as those incurred for sales literature, prospectus printing
  and distribution and compensation to wholesalers. It is possible that in
  any given year the amount paid to the Distributor under the Class A Plan,
  Class B Plan or Class C Plan may exceed the Distributor's distribution
  costs as described above. The Distribution Plans provide that each class of
  shares of each Fund may also pay the Distributor an account maintenance and
  service fee at the annual rate of up to 0.25% of the aggregate average
  daily net assets of such class of shares for payments to broker-dealers for
  providing continuing account maintenance. Accordingly, for the periods
  ended March 31, 1998, SACS received fees (see the Statement of Operations)
  based upon the aforementioned rates.
 
  SACS receives sales charges on each Fund's Class A shares, portions of
  which are reallowed to affiliated broker-dealers and non-affiliated broker-
  dealers. SACS also receives the proceeds of contingent deferred sales
  charges paid by investors in connection with certain redemptions of Class B
  and Class C fund shares. SACS has advised the Funds that for the periods
  ended March 31, 1998, the proceeds received from Class A sales (and paid
  out to affiliated and non-affiliated broker-dealers) and Class B and Class
  C redemptions were as follows:
 
<TABLE>
<CAPTION>
                                            CLASS A                   CLASS B      CLASS C
                             -------------------------------------- ------------ ------------
                                                                     CONTINGENT   CONTINGENT
                              SALES     AFFILIATED   NON-AFFILIATED   DEFERRED     DEFERRED
                             CHARGES  BROKER-DEALERS BROKER-DEALERS SALES CHARGE SALES CHARGE
                             -------- -------------- -------------- ------------ ------------
   <S>                       <C>      <C>            <C>            <C>          <C>
   U.S. Government Securi-
    ties Fund..............  $ 25,103    $ 17,121       $  4,070      $270,398      $ --
   Federal Securities Fund.    36,021      11,517         16,849        19,862        --
   Diversified Income Fund.    72,686      20,452         38,553       124,129        --
   High Income Fund........   353,552     115,057        178,181       402,985         0
   Tax Exempt Insured Fund.    62,143      33,967         16,329        69,255        --
</TABLE>
 
 
                                       34
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
  The Trust has entered into a Service Agreement with SunAmerica Fund
  Services, Inc. ("SAFS"), an indirect wholly owned subsidiary of SunAmerica
  Inc. Under the Service Agreement, SAFS performs certain shareholder account
  functions by assisting the Funds' transfer agent in connection with the
  services that it offers to the shareholders of the Funds. The Service
  Agreement permits the Funds to compensate SAFS for services rendered, based
  upon an annual rate of .22% of average daily net assets, which is approved
  annually by the Trustees. For the periods ended March 31, 1998, the Funds
  incurred the following expenses which are included in transfer agent fees
  and expenses in the Statement of Operations to compensate SAFS pursuant to
  the terms of the Service Agreement:
 
<TABLE>
<CAPTION>
                                                             PAYABLE AT
                                     EXPENSES              MARCH 31, 1998
                             ------------------------- -----------------------
                             CLASS A  CLASS B  CLASS C CLASS A CLASS B CLASS C
                             -------- -------- ------- ------- ------- -------
   <S>                       <C>      <C>      <C>     <C>     <C>     <C>
   U.S. Government Securi-
    ties Fund............... $235,618 $546,272  $--    $19,099 $39,490  $--
   Federal Securities Fund..   67,980   40,601   --      5,901   3,500   --
   Diversified Income Fund..   51,588  161,743   --      4,756  11,888   --
   High Income Fund.........  101,649  229,233   158    10,205  22,624   134
   Tax Exempt Insured Fund..  203,791   52,610   --     16,577   4,279   --
</TABLE>
 
Note 4. Purchases and Sales of Investment Securities
 
  The aggregate cost of purchases and proceeds from sales and maturities of
  long-term investments (excluding U.S. Government securities in the
  Diversified Income and High Income Funds, respectively) during the year
  ended March 31, 1998 were as follows:
 
<TABLE>
<CAPTION>
                                U.S.
                             GOVERNMENT    FEDERAL    DIVERSIFIED      HIGH     TAX EXEMPT
                             SECURITIES   SECURITIES     INCOME       INCOME      INSURED
                                FUND         FUND         FUND         FUND        FUND
                            ------------ ------------ ------------ ------------ -----------
   <S>                      <C>          <C>          <C>          <C>          <C>
   Aggregate purchases..... $813,642,011 $250,645,171 $145,587,451 $393,036,948 $55,025,082
                            ============ ============ ============ ============ ===========
   Aggregate sales......... $860,905,921 $249,558,886 $162,603,386 $346,639,045 $73,721,350
                            ============ ============ ============ ============ ===========
</TABLE>
 
Note 5. Portfolio Securities (Tax Basis)
 
  The Funds intend to comply with the requirements of the Internal Revenue
  Code, as amended, applicable to regulated investment companies and to
  distribute all of their net income (taxable and tax exempt) to their
  shareholders. Therefore, no federal income tax or excise tax provisions are
  required.
 
  The amounts of aggregate unrealized gain (loss) and the cost of investment
  securities for federal tax purposes, including short-term securities and
  repurchase agreements, were as follows:
 
<TABLE>
<CAPTION>
                                U.S.
                             GOVERNMENT     FEDERAL    DIVERSIFIED      HIGH       TAX EXEMPT
                             SECURITIES   SECURITIES     INCOME        INCOME       INSURED
                                FUND         FUND         FUND          FUND          FUND
                            ------------  -----------  -----------  ------------  ------------
   <S>                      <C>           <C>          <C>          <C>           <C>
   Cost.................... $330,670,627  $52,826,532  $84,614,681  $183,572,204  $101,116,712
                            ============  ===========  ===========  ============  ============
   Appreciation............ $  5,226,169  $   957,556  $ 4,246,165  $  5,525,107  $  8,819,099
   Depreciation............   (2,047,756)    (118,907)  (2,455,492)   (5,612,519)     (105,957)
                            ------------  -----------  -----------  ------------  ------------
   Unrealized appreciation
    (depreciation)--net.... $  3,178,413  $   838,649  $ 1,790,673  $    (87,412) $  8,713,142
                            ============  ===========  ===========  ============  ============
</TABLE>
 
 
                                       35
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
  At March 31, 1998, U.S. Government Securities Fund, Diversified Income
  Fund, High Income Fund and Tax Exempt Insured Fund had capital loss
  carryforwards of $29,467,409, $24,716,935, $22,767,991 and $3,338,986,
  respectively, which were available to the extent provided in regulations
  and which will expire between 1999-2005. To the extent that these carryover
  losses are used to offset future capital gains, it is probable that the
  gains so offset will not be distributed.
 
  U.S. Government Securities Fund, Federal Securities Fund, Diversified
  Income Fund, High Income Fund and Tax Exempt Insured Fund utilized capital
  loss carryforwards of $7,942,831, $1,045,533, $5,115,099, $11,236,372 and
  $3,208,746, respectively, to offset the Funds' net taxable gains realized
  and recognized in the year ended March 31, 1998.
 
  High Income Fund had capital loss carryforwards of $3,615,390 which expired
  in the year ended March 31, 1998.
 
Note 6. Capital Share Transactions
 
  Transactions in capital shares of each class of each series were as
  follows:
 
<TABLE>
<CAPTION>
                                                    U.S. GOVERNMENT SECURITIES FUND
                  ----------------------------------------------------------------------------------------------------------
                                      CLASS A                                               CLASS B
                  --------------------------------------------------  ------------------------------------------------------
                          FOR THE                   FOR THE                    FOR THE                     FOR THE
                        YEAR ENDED                YEAR ENDED                 YEAR ENDED                  YEAR ENDED
                      MARCH 31, 1998            MARCH 31, 1997             MARCH 31, 1998              MARCH 31, 1997
                  ------------------------  ------------------------  --------------------------  --------------------------
                    SHARES       AMOUNT       SHARES       AMOUNT       SHARES        AMOUNT        SHARES        AMOUNT
                  ----------  ------------  ----------  ------------  -----------  -------------  -----------  -------------
<S>               <C>         <C>           <C>         <C>           <C>          <C>            <C>          <C>
Shares sold.....   1,561,577  $ 13,510,139   2,843,102  $ 24,070,752      482,064  $   4,147,772      851,285  $   7,192,469
Reinvested
 dividends......     440,207     3,777,028     462,183     3,908,049      872,849      7,489,193    1,318,904     11,152,661
Shares redeemed.  (4,288,472)  (36,902,611) (4,515,889)  (38,204,048) (11,930,767)  (102,271,581) (17,979,626)  (152,107,446)
                  ----------  ------------  ----------  ------------  -----------  -------------  -----------  -------------
Net decrease....  (2,286,688) $(19,615,444) (1,210,604) $(10,225,247) (10,575,854) $ (90,634,616) (15,809,437) $(133,762,316)
                  ==========  ============  ==========  ============  ===========  =============  ===========  =============
<CAPTION>
                                                        FEDERAL SECURITIES FUND
                  ----------------------------------------------------------------------------------------------------------
                                      CLASS A                                               CLASS B
                  --------------------------------------------------  ------------------------------------------------------
                          FOR THE                   FOR THE                    FOR THE                     FOR THE
                        YEAR ENDED                YEAR ENDED                 YEAR ENDED                  YEAR ENDED
                      MARCH 31, 1998            MARCH 31, 1997             MARCH 31, 1998              MARCH 31, 1997
                  ------------------------  ------------------------  --------------------------  --------------------------
                    SHARES       AMOUNT       SHARES       AMOUNT       SHARES        AMOUNT        SHARES        AMOUNT
                  ----------  ------------  ----------  ------------  -----------  -------------  -----------  -------------
<S>               <C>         <C>           <C>         <C>           <C>          <C>            <C>          <C>
Shares sold.....     374,888  $  4,088,015     187,062  $  1,941,579      358,787  $   3,922,859      171,783  $   1,794,682
Reinvested
 dividends......     118,009     1,278,607     130,519     1,361,673       65,988        716,876       82,353        860,591
Shares redeemed.    (560,471)   (6,066,157) (1,244,469)  (12,990,824)    (537,411)    (5,824,823)    (941,907)    (9,850,854)
                  ----------  ------------  ----------  ------------  -----------  -------------  -----------  -------------
Net decrease....     (67,574) $   (699,535)   (926,888) $ (9,687,572)    (112,636) $  (1,185,088)    (687,771) $  (7,195,581)
                  ==========  ============  ==========  ============  ===========  =============  ===========  =============
</TABLE>
 
                                       36
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
<TABLE>
<CAPTION>
                                                      DIVERSIFIED INCOME FUND
                  ------------------------------------------------------------------------------------------------------
                                     CLASS A                                             CLASS B
                  -------------------------------------------------  ---------------------------------------------------
                          FOR THE                  FOR THE                   FOR THE                   FOR THE
                        YEAR ENDED                YEAR ENDED               YEAR ENDED                 YEAR ENDED
                      MARCH 31, 1998            MARCH 31, 1997           MARCH 31, 1998             MARCH 31, 1997
                  ------------------------  -----------------------  ------------------------  -------------------------
                    SHARES       AMOUNT       SHARES      AMOUNT       SHARES       AMOUNT       SHARES        AMOUNT
                  ----------  ------------  ----------  -----------  ----------  ------------  -----------  ------------
<S>               <C>         <C>           <C>         <C>          <C>         <C>           <C>          <C>
Shares sold.....   1,839,412  $  8,430,833   2,967,500  $13,107,488   2,110,864  $  9,588,048    2,028,462  $  8,850,838
Reinvested
 dividends......     240,267     1,101,956     192,535      845,962     671,248     3,082,375      935,249     4,101,854
Shares redeemed.  (1,776,362)   (8,143,958) (1,919,822)  (8,393,062) (7,008,938)  (32,175,337) (11,026,801)  (48,421,764)
                  ----------  ------------  ----------  -----------  ----------  ------------  -----------  ------------
Net increase
 (decrease).....     303,317  $  1,388,831   1,240,213  $ 5,560,388  (4,226,826) $(19,504,914)  (8,063,090) $(35,469,072)
                  ==========  ============  ==========  ===========  ==========  ============  ===========  ============
<CAPTION>
                                                         HIGH INCOME FUND
                  ------------------------------------------------------------------------------------------------------
                                     CLASS A                                             CLASS B
                  -------------------------------------------------  ---------------------------------------------------
                          FOR THE                  FOR THE                   FOR THE                   FOR THE
                        YEAR ENDED                YEAR ENDED               YEAR ENDED                 YEAR ENDED
                      MARCH 31, 1998            MARCH 31, 1997           MARCH 31, 1998             MARCH 31, 1997
                  ------------------------  -----------------------  ------------------------  -------------------------
                    SHARES       AMOUNT       SHARES      AMOUNT       SHARES       AMOUNT       SHARES        AMOUNT
                  ----------  ------------  ----------  -----------  ----------  ------------  -----------  ------------
<S>               <C>         <C>           <C>         <C>          <C>         <C>           <C>          <C>
Shares sold.....   2,986,074  $ 22,434,607   2,138,523  $15,178,086   9,598,071  $ 70,922,480    7,842,612  $ 55,170,199
Reinvested
 dividends......     321,604     2,408,861     306,218    2,170,892     630,317     4,732,950      753,534     5,344,680
Shares redeemed.  (1,885,818)  (13,976,905) (1,792,558) (12,665,768) (8,118,195)  (59,444,035)  (7,864,875)  (55,713,062)
                  ----------  ------------  ----------  -----------  ----------  ------------  -----------  ------------
Net increase....   1,421,860  $ 10,866,563     652,183  $ 4,683,210   2,110,193  $ 16,211,395      731,271  $  4,801,817
                  ==========  ============  ==========  ===========  ==========  ============  ===========  ============
<CAPTION>
                     HIGH INCOME FUND
                  ------------------------
                          CLASS C
                  ------------------------
                      FOR THE PERIOD
                     FEBRUARY 2, 1998*
                          THROUGH
                      MARCH 31, 1998
                  ------------------------
                    SHARES       AMOUNT
                  ----------  ------------
<S>               <C>         <C>           <C>         <C>          <C>         <C>           <C>          <C>
Shares sold.....     146,640  $  1,136,487
Reinvested
 dividends......         396         3,080
Shares redeemed.         (14)         (112)
                  ----------  ------------
Net increase....     147,022  $  1,139,455
                  ==========  ============
</TABLE>
* Commencement of sale of respective class of shares
 
<TABLE>
<CAPTION>
                                                        TAX EXEMPT INSURED FUND
                       -------------------------------------------------------------------------------------------------
                                           CLASS A                                          CLASS B
                       --------------------------------------------------  ---------------------------------------------
                               FOR THE                   FOR THE                 FOR THE                 FOR THE
                             YEAR ENDED                YEAR ENDED               YEAR ENDED             YEAR ENDED
                           MARCH 31, 1998            MARCH 31, 1997           MARCH 31, 1998         MARCH 31, 1997
                       ------------------------  ------------------------  ---------------------  ----------------------
                         SHARES       AMOUNT       SHARES       AMOUNT      SHARES     AMOUNT      SHARES      AMOUNT
                       ----------  ------------  ----------  ------------  --------  -----------  --------  ------------
<S>                    <C>         <C>           <C>         <C>           <C>       <C>          <C>       <C>
Shares sold...........    139,133  $  1,784,062     191,259  $  2,373,663   338,073  $ 4,316,434   530,461  $  6,566,926
Reinvested dividends..    166,540     2,132,131     213,682     2,650,948    45,130      578,035    59,647       740,342
Shares redeemed....... (1,483,284)  (18,915,862) (2,254,438)  (27,912,841) (657,257)  (8,386,367) (920,911)  (11,459,216)
                       ----------  ------------  ----------  ------------  --------  -----------  --------  ------------
Net decrease.......... (1,177,611) $(14,999,669) (1,849,497) $(22,888,230) (274,054) $(3,491,898) (330,803) $ (4,151,948)
                       ==========  ============  ==========  ============  ========  ===========  ========  ============
</TABLE>
 
                                       37
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 NOTES TO FINANCIAL STATEMENTS -- March 31, 1998 -- (continued)
 
Note 7. Commitments and Contingencies
 
  The SunAmerica Family of Mutual Funds has established an uncommitted line
  of credit with the State Street Bank and Trust Company, the Funds'
  custodian, with interest payable at the Federal Funds rate plus 100 basis
  points with respect to the U.S. Government Securities Fund and Federal
  Securities Fund, and Federal Funds rate plus 125 basis points with respect
  to the Diversified Income Fund and the High Income Fund. Borrowings under
  the line of credit will commence when the Fund's cash shortfall exceeds
  $100,000. During the year ended March 31, 1998 the Diversified Income and
  High Income Fund periodically utilized the uncommitted line of credit and
  incurred an interest expense of $3,481 and $9,691, respectively. The Funds
  did not have any outstanding borrowings at March 31, 1998.
 
Note 8. Trustees Retirement Plan
 
  The Trustees (and Directors) of the SunAmerica Family of Mutual Funds have
  adopted the SunAmerica Disinterested Trustees' and Directors' Retirement
  Plan (the "Retirement Plan") effective January 1, 1993 for the unaffiliated
  Trustees. The Retirement Plan provides generally that if an unaffiliated
  Trustee who has at least 10 years of consecutive service as a Disinterested
  Trustee of any of the SunAmerica mutual funds (an "Eligible Trustee")
  retires after reaching age 60 but before age 70 or dies while a Trustee,
  such person will be eligible to receive a retirement or death benefit from
  each SunAmerica mutual fund with respect to which he or she is an Eligible
  Trustee. As of each birthday, prior to the 70th birthday, but in no event
  for a period greater than 10 years, each Eligible Trustee will be credited
  with an amount equal to  50% of his or her regular fees (excluding
  committee fees) for services as a Disinterested Trustee of each SunAmerica
  mutual fund for the calendar year in which such birthday occurs. In
  addition, an amount equal to 8.5% of any amounts credited under the
  preceding clause during prior years is added to each Eligible Trustee's
  Account until such Eligible Trustee reaches his or her 70th birthday. An
  Eligible Trustee may receive any benefits payable under the Retirement
  Plan, at his or her election, either in one lump sum or in up to fifteen
  annual installments. As of March 31, 1998, U.S. Government Securities Fund,
  Federal Securities Fund, Diversified Income Fund, High Income Fund and Tax
  Exempt Insured Fund had accrued $71,765, $7,674, $15,488, $18,521 and
  $18,258, respectively, for the Retirement Plan, which is included in
  accrued expenses on the Statement of Assets and Liabilities and for the
  year ended March 31, 1998 expensed $17,341, $2,132, $4,384, $6,180 and
  $5,296, respectively, for the Retirement Plan, which is included in
  Trustees' fees and expenses on the Statement of Operations.
 
                                       38
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 REPORT OF INDEPENDENT ACCOUNTANTS
To the Trustees and Shareholders of SunAmerica Income Funds
 
In our opinion, the accompanying statement of assets and liabilities,
including the portfolios of investments, and the related statements of
operations and of changes in net assets and the financial highlights present
fairly, in all material respects, the financial position of SunAmerica U.S.
Government Securities Fund, SunAmerica Federal Securities Fund, SunAmerica
Diversified Income Fund, SunAmerica High Income Fund and SunAmerica Tax Exempt
Insured Fund (constituting SunAmerica Income Funds, hereafter referred to as
the "Fund") at March 31, 1998, the results of each of their operations for the
year then ended, the changes in each of their net assets for each of the two
years in the period then ended and the financial highlights for each of the
periods indicated, in conformity with generally accepted accounting
principles. These financial statements and financial highlights (hereafter
referred to as "financial statements") are the responsibility of the Fund's
management; our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits of these financial
statements in accordance with generally accepted auditing standards which
require that we plan and perform the audit to obtain reasonable assurance
about whether the financial statements are free of material misstatement. An
audit includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits, which included
confirmation of securities at March 31, 1998 by correspondence with the
custodian and brokers and the application of alternative auditing procedures
where confirmations from brokers were not received, provide a reasonable basis
for the opinion expressed above.
 
PRICE WATERHOUSE LLP
 
1177 Avenue of the Americas
New York, New York
May 12, 1998
 
                                      39
<PAGE>
 
 SUNAMERICA INCOME FUNDS
 SHAREHOLDER TAX INFORMATION -- (unaudited)
 
Certain tax information regarding the SunAmerica Income Funds is required to be
provided to shareholders based upon each Fund's income and distributions for
the taxable periods ended March 31, 1998. The information and distributions
reported herein may differ from the information and distributions taxable to
the shareholders for the calendar year ending December 31, 1998. The
information necessary to complete your income tax returns will be included with
your Form 1099-DIV to be received under separate cover in January 1999.
 
During the year ended March 31, 1998 Tax Exempt Insured Fund paid tax exempt
interest dividends of $.57 per share to Class A shareholders and $.48 per share
to Class B shareholders. For the year ended March 31, 1998, 1.5% of the
dividends paid from ordinary income by the High Income Fund qualified for the
70% dividends received deduction for corporations.
 
                                       40

<PAGE>
 
                                    APPENDIX

                    BOND, NOTE AND COMMERCIAL PAPER RATINGS

DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S ("MOODY'S") CORPORATE AND TAX-
EXEMPT BOND RATINGS

     Aaa  Bonds which are rated Aaa are judged to be of the best quality. They
          carry the smallest degree of investment risk and are generally
          referred to as "gilt edge." Interest payments are protected by a large
          or by an exceptionally stable margin and principal is secure. While
          the various protective elements are likely to change, such changes as
          can be visualized are most unlikely to impair the fundamentally strong
          position of such issues.

     Aa   Bonds which are rated Aa are judged to be of high quality by all
          standards. Together with the Aaa group they comprise what are
          generally known as high grade bonds. They are rated lower than the
          best bonds because margins of protection may not be as large as in Aaa
          securities or fluctuation of protective elements may be of greater
          amplitude or there may be other elements present which make the long-
          term risks appear somewhat larger than in Aaa securities.

     A    Bonds which are rated A possess many favorable investment attributes
          and are to be considered as upper medium grade obligations. Factors
          giving security to principal and interest are considered adequate, but
          elements may be present which suggest a susceptibility to impairment
          sometime in the future.

     Baa  Bonds which are rated Baa are considered as medium grade obligations;
          i.e., they are neither highly protected nor poorly secured. Interest
          payments and principal security appear adequate for the present but
          certain protective elements may be lacking or may be
          characteristically unreliable over any great length of time. Such
          bonds lack outstanding investment characteristics and in fact have
          speculative characteristics as well.

     Ba   Bonds which are rated Ba are judged to have speculative elements;
          their future cannot be considered as well assured. Often the
          protection of interest and principal payments may be very moderate,
          and therefore not well safeguarded during both good and bad times over
          the future. Uncertainty of position characterizes bonds in this class.

     B    Bonds which are rated B generally lack characteristics of desirable
          investments. Assurance of interest and principal payments or of
          maintenance of other terms of the contract over any long period of
          time may be small.



                                  Appendix -1
<PAGE>
 
     Caa  Bonds which are rated Caa are of poor standing. Such issues may be in
          default or there may be present elements of danger with respect to
          principal or interest.

     Ca   Bonds which are rated Ca represent obligations which are speculative
          in a high degree. Such issues are often in default or have other
          marked shortcomings.

     C    Bonds which are rated C are the lowest rated class of bonds, and
          issues so rated can be regarded as having extremely poor prospects of
          ever attaining any real investment standing.

     Note:  Moody's may apply numerical modifiers 1, 2 and 3 in each generic
rating classification from Aa through B in its corporate bond rating system.
The modifier 1 indicates that the security ranks in the higher end of its
generic rating category; the modifier 2 indicates a mid-range ranking; and the
modifier 3 indicates that the issue ranks in the lower end of the generic rating
category.  The foregoing ratings for tax-exempt bonds are sometimes presented in
parentheses preceded with a "con" indicating the bonds are rated conditionally.
Bonds for which the security depends upon the completion of some act or the
fulfillment of some condition are rated conditionally. These are bonds secured
by (a) earnings of projects under construction, (b) earnings of projects
unseasoned in operation experience, (c) rentals which begin when facilities are
completed, or (d) payments to which some other limiting condition attaches.
Such parenthetical rating denotes the probable credit stature upon completion of
construction or elimination of the basis of the condition.

DESCRIPTION OF MOODY'S TAX-EXEMPT NOTE RATINGS

     The ratings of Moody's for tax-exempt notes are MIG 1, MIG 2, MIG 3 and MIG
4.

          MIG 1  Notes bearing the designation MIG 1 are judged to be of the
                 best quality, enjoying strong protection from established cash
                 flows of funds for their servicing or from established and
                 broad-based access to the market for refinancing, or both.

          MIG 2  Notes bearing the designation MIG 2 are judged to be of high
                 quality, with margins of protection ample although not so large
                 as in the preceding group.

          MIG 3  Notes bearing the designation MIG 3 are judged to be of
                 favorable quality, with all security elements accounted for but
                 lacking the undeniable strength of the preceding grades. Market
                 access for refinancing, in particular, is likely to be less
                 well established.



                                   Appendix-2
<PAGE>
 
          MIG 4  Notes bearing the designation MIG 4 are judged to be of
                 adequate quality, carrying specific risk but having protection
                 commonly regarded as required of an investment security and not
                 distinctly or predominantly speculative.

DESCRIPTION OF MOODY'S CORPORATE AND TAX-EXEMPT COMMERCIAL PAPER RATINGS

     The term "commercial paper" as used by Moody's means promissory obligations
not having an original maturity in excess of nine months.  Moody's makes no
representations as to whether such commercial paper is by any other definition
"commercial paper" or is exempt from registration under the Securities Act.

     Moody's rating grades for commercial paper are applied to municipal
commercial paper as well as taxable commercial paper.

     Moody's commercial paper ratings are opinions of the ability of issuers to
repay punctually promissory obligations not having an original maturity in
excess of nine months.  Moody's makes no representation that such obligations
are exempt from registration under the Securities Act of 1933, as amended, nor
does it represent that any specific note is a valid obligation of a rated issuer
or issued in conformity with any applicable law.  Moody's employs the following
three designations, all judged to be investment grade, to indicate the relative
repayment capacity of rated issuers:

     Issuers rated PRIME-1 (or related supporting institutions) have a superior
capacity for repayment of short-term promissory obligations.  PRIME-1 repayment
capacity will normally be evidenced by the following characteristics:

     --  Leading market positions in well established industries
     --  High rates of return on funds employed
     --  Conservative capitalization structures with moderate reliance on debt
         and ample asset protection
     --  Broad margins in earnings coverage of fixed financial charges and high
         internal cash generation
     --  Well established access to a range of financial markets and assured
         sources of alternate liquidity.

     Issuers rated PRIME-2 (or related supporting institutions) have a strong
capacity for repayment of short-term promissory obligations.  This will normally
be evidenced by many of the characteristics cited above but to a lesser degree.
Earnings trends and coverage ratios, while sound, will be more subject to
variation.  Capitalization characteristics, while still appropriate, may be more
affected by external conditions.  Ample alternate liquidity is maintained.

     Issuers rated PRIME-3 (or related supporting institutions) have an
acceptable capacity for repayment of short-term promissory obligations.  The
effect of industry characteristics and market composition may be more
pronounced.  Variability in earnings and profitability may result in changes in
level of debt protection measurements and the requirement for relatively high
financial leverage.  Adequate alternate liquidity is maintained.



                                   Appendix-3
<PAGE>
 
     Issuers rated NOT PRIME do not fall within any of the Prime rating
categories.

     If an issuer represents to Moody's that its commercial paper obligations
are supported by the credit of another entity or entities, then the name or
names of such supporting entity or entities are listed within parentheses
beneath the name of the issuer, or there is a footnote referring the reader to
another page for the name or names of the supporting entity or entities.  In
assigning ratings to such issuers, Moody's evaluates the financial strength of
the indicated affiliated corporations, commercial banks, insurance companies,
foreign governments or other entities, but only as one factor in the total
rating assessment.  Moody's makes no representation and gives no opinion on the
legal validity or enforceability of any support arrangement.  You are cautioned
to review with your counsel any questions regarding particular support
arrangements.

     Among the factors considered by Moody's in assigning ratings are the
following:  (1) evaluation of the management of the issuer; (2) economic
evaluation of the issuer's industry or industries and an appraisal of
speculative type risks which may be inherent in certain areas; (3) evaluation of
the issuer's products in relation to competition and customer acceptance; (4)
liquidity; (5) amount and quality of long-term debt; (6) trend of earnings over
a period of ten years; (7) financial strength of a parent company and the
relationships which exist with the issuer; and (8) recognition by management of
obligations which may be present or may arise as a result of public interest
questions and preparations to meet such obligations.

DESCRIPTION OF STANDARD & POOR'S RATINGS SERVICES, A DIVISION OF THE MCGRAW-HILL
COMPANIES, INC. ("STANDARD & POOR'S") CORPORATE AND TAX-EXEMPT BOND RATINGS

     A Standards & Poor's corporate or municipal rating is a current assessment
of the creditworthiness of an obligor with respect to a specific obligation.
This assessment may take into consideration obligers such as guarantors,
insurers, or lessees.

     The debt rating is not a recommendation to purchase, sell or hold a
security, inasmuch as it does not comment as to market price or suitability for
a particular investor.

     The ratings are based on current information furnished by the issuer or
obtained by Standard & Poor's from other sources it considers reliable.
Standard & Poor's does not perform an audit in connection with any rating and
may, on occasion, rely on unaudited financial information.  The ratings may be
changed, suspended or withdrawn as a result of changes in, or unavailability of,
such information, or for other reasons.

     The ratings are based, in varying degrees, on the following considerations:
(1) likelihood of default capacity and willingness of the obligor as to the
timely payment of interest and repayment of principal in accordance with the
terms of the obligation: (2) nature of and provisions of the obligation; and (3)
protection afforded by, and relative position of, the obligation in the event of
bankruptcy, reorganization or other arrangement under the laws of bankruptcy and
other laws affecting creditors' rights.

     AAA  Debt rated AAA has the highest rating assigned by Standard & Poor's.
          Capacity to pay interest and repay principal is extremely strong.



                                   Appendix-4
<PAGE>
 
     AA   Debt rated AA has a very strong capacity to pay interest and repay
          principal and differs from the highest-rated issues only in small
          degree.

     A    Debt rated A has a strong capacity to pay interest and repay principal
          although it is somewhat more susceptible to the adverse effects of
          changes in circumstances and economic conditions than debt in higher-
          rated categories.

     BBB  Debt rated BBB is regarded as having an adequate capacity to pay
          interest and repay principal. Whereas it normally exhibits adequate
          protection parameters, adverse economic conditions or changing
          circumstances are more likely to lead to a weakened capacity to pay
          interest and repay principal for debt in this category than for debt
          in higher-rated categories.

          Debt rated BB, B, CCC, CC and C are regarded as having predominantly
          speculative characteristics with respect to capacity to pay interest
          and repay principal. BB indicates the least degree of speculation and
          C the highest degree of speculation. While such debt will likely have
          some quality and protective characteristics, these are outweighed by
          large uncertainties or major risk exposure to adverse conditions.

     BB   Debt rated BB has less near-term vulnerability to default than other
          speculative grade debt. However, it faces major ongoing uncertainties
          or exposure to adverse business, financial or economic conditions
          which could lead to inadequate capacity to meet timely interest and
          principal payment. The BB rating category is also used for debt
          subordinated to senior debt that is assigned an actual or implied 
          BBB - rating.

     B    Debt rated B has a greater vulnerability to default but presently has
          the capacity to meet interest payments and principal repayments.
          Adverse business, financial or economic conditions would likely impair
          capacity or willingness to pay interest and repay principal. The B
          rating category is also used for debt subordinated to senior debt that
          is assigned an actual or implied BB or BB-rating.

     CCC  Debt rated CCC has a current identifiable vulnerability to default,
          and is dependent upon favorable business, financial and economic
          conditions to meet timely payments of interest and repayments of
          principal. In the event of adverse business, financial or economic
          conditions, it is not likely to have the capacity to pay interest and
          repay principal. The CCC rating category is also used for debt
          subordinated to senior debt that is assigned an actual or implied B or
          B- rating.

     CC   The rating CC is typically applied to debt subordinated to senior debt
          which is assigned an actual or implied CCC rating.

     C    The rating C is typically applied to debt subordinated to senior debt
          which is assigned an actual or implied CCC- debt rating. The C rating
          may be used to cover a situation where a bankruptcy petition has been
          filed but debt service payments are continued.



                                   Appendix-5
<PAGE>
 
     CI   The rating CI is reserved for income bonds on which no interest is
          being paid.

     D    Debt rated D is in default. The D rating is assigned on the day an
          interest or principal payment is missed. The D rating also will be
          used upon the filing of a bankruptcy petition if debt service payments
          are jeopardized.

     Plus (+) or minus (-): The ratings of "AA" to "CCC" may be modified by the
     addition of a plus or minus sign to show relative standing within these
     ratings categories.

     Provisional ratings:  The letter "p" indicates that the rating is
provisional.  A provisional rating assumes the successful completion of the
project being financed by the debt being rated and indicates that payment of
debt service requirements is largely or entirely dependent upon the successful
and timely completion of the project. This rating, however, while addressing
credit quality subsequent to completion of the project, makes no comment on the
likelihood or risk of default upon failure of such completion.  The investor
should exercise judgment with respect to such likelihood and risk.

     L    The letter "L" indicates that the rating pertains to the principal
          amount of those bonds to the extent that the underlying deposit
          collateral is insured by the Federal Savings & Loan Insurance Corp. or
          the Federal Deposit Insurance Corp. and interest is adequately
          collateralized.

     *    Continuance of the rating is contingent upon Standard & Poor's receipt
          of an executed copy of the escrow agreement or closing documentation
          confirming investments and cash flows.

     NR   Indicates that no rating has been requested, that there is
          insufficient information on which to base a rating or that Standard &
          Poor's does not rate a particular type of obligation as a matter of
          policy.

     Debt Obligations of Issuers outside the United States and its territories
are rated on the same basis as domestic corporate and municipal issues.  The
ratings measure the credit worthiness of the obligor but do not take into
account currency exchange and related uncertainties.

BOND INVESTMENT QUALITY STANDARDS:  Under present commercial bank regulations
issued by the Comptroller of the Currency, bonds rated in  the top four
categories ("AAA", "AA", "A", "BBB", commonly known as "investment grade"
ratings) are generally regarded as eligible for bank investment.  In addition,
the laws of various states governing legal investments impose certain rating or
other standards for obligations eligible for investment by savings banks, trust
companies, insurance companies and fiduciaries generally.

DESCRIPTION OF STANDARD & POOR'S TAX-EXEMPT NOTE RATINGS

     The ratings of Standard & Poor's for municipal notes issued on or after
July 29, 1984 are "SP-1", "SP-2" and  "SP-3."  Prior to July 29, 1984, municipal
notes carried the same symbols as municipal bonds.



                                  Appendix -6
<PAGE>
 
     SP-1 The designation "SP-1" indicates a very strong capacity to pay
          principal and interest. A "+" is added for those issues determined to
          possess overwhelming safety characteristics.

     SP-2 An "SP-2" designation indicates a satisfactory capacity to pay
          principal and interest.

     SP-3 "SP-3" designation indicates speculative capacity to pay principal and
          interest.

DESCRIPTION OF STANDARD & POOR'S CORPORATE AND TAX-EXEMPT COMMERCIAL PAPER
RATINGS.

     Standard & Poor's rating grades for commercial paper are applied to
municipal commercial paper as well as taxable commercial paper.

     A Standard & Poor's commercial paper rating is a current assessment of the
likelihood of timely payment of debt having an original maturity of not more
than 365 days.  Ratings are graded into four categories, ranging from "A" for
the highest quality obligations to "D" for the lowest.

     A    Issues assigned this highest rating are regarded as having the
          greatest capacity for timely payment. Issues in this category are
          delineated with the numbers 1, 2 and 3 to indicate the relative degree
          of safety.

     A-1  This designation indicates that the degree of safety regarding timely
          payment is either overwhelming or very strong. Those issues determined
          to possess overwhelming safety characteristics are denoted with a plus
          (+) sign designation.

     A-2  Capacity for timely payment on issues with this designation is strong.
          However, the relative degree of safety is not as high as for issues
          designated "A-1".

     A-3  Issues carrying this designation have a satisfactory capacity for
          timely payment. They are, however, somewhat more vulnerable to the
          adverse effect of changes in circumstances than obligations carrying
          the higher designations.

     B    Issues rated "B" are regarded as having only adequate capacity for
          timely payment. However, such capacity may be damaged by changing
          conditions or short-term adversities.

     C    This rating is assigned to short-term debt obligations with a doubtful
          capacity for payment.

     D    This rating indicates that the issue is either in default or is
          expected to be in default upon maturity.

     The commercial paper rating is not a recommendation to purchase or sell a
security.  The ratings are based on current information furnished to Standard &
Poor's by the issuer or obtained from other sources it considers reliable.  The
ratings may be changed, suspended, or withdrawn as a result of changes in or
unavailability of such information.



                                   Appendix-7
<PAGE>
 
                                    PART C
                               OTHER INFORMATION



ITEM 24.  FINANCIAL STATEMENTS AND EXHIBITS.

     (a)  Financial Statements:
                            
          Set forth in Part B of Registrant's Statement of Additional
          Information are the financial statements for the SunAmerica Income
          Funds for the fiscal year ended March 31, 1998. Selected per share
          data and ratios are set forth in Part A of the Prospectus under the
          caption "Financial Highlights." No financial statements are included
          in Part C.     

          All other financial statements, schedules and historical financial
          information are omitted because the conditions requiring their filing
          do not exist.

     (b)  Exhibits:

          (1)       Declaration of Trust, as amended.  Incorporated herein by
                    reference to Post-Effective Amendment No. 20 to Registrant's
                    Registration Statement on form N-1A filed on July 27, 1995.

          (2)       By-Laws, as amended.  Incorporated herein by reference to
                    Post-Effective Amendment No. 20 to Registrant's Registration
                    Statement on form N-1A filed on July 27, 1995.

          (3)       Inapplicable.
    
          (4)       Inapplicable.     

          (5)       Investment Advisory and Management Agreement between
                    Registrant and SunAmerica Asset Management Corp.
                    Incorporated herein by reference to Post-Effective Amendment
                    No. 20 to Registrant's Registration Statement on form N-1A
                    filed on July 27, 1995.

          (6)  (a)  Distribution Agreement between Registrant and SunAmerica
                    Capital Services, Inc.  Incorporated herein by reference to
                    Post-Effective Amendment No. 20 to Registrant's Registration
                    Statement on Form N-1A filed on July 27, 1995.
    
               (b)  Dealer Agreement. Incorporated herein by reference to Post-
                    Effective Amendment No. 21 to Registrant's Registration
                    Statement on Form N-1A filed on July 19, 1996.     
                            
          (7)       Directors'/Trustees' Retirement Plan. Incorporated herein by
                    reference to Post-Effective Amendment No. 21 to Registrant's
                    Registration Statement on Form N-1A filed on July 19, 
                    1996.     
                            
          (8)       Custodian Agreement between Registrant and State Street Bank
                    and Trust Company.  Incorporated herein by reference to
                    Post-Effective Amendment No. 21 to Registrant's Registration
                    Statement on Form N-1A filed on July 19, 1996.          
<PAGE>
 
    
          (9)  (a)  Transfer Agency and Service Agreement between Registrant and
                    State Street Bank and Trust Company. Incorporated herein by
                    reference to Post-Effective Amendment No. 21 to Registrant's
                    Registration Statement on Form N-1A filed on July 19, 
                    1996.     

               (b)  Service Agreement between Registrant and SunAmerica Fund
                    Services, Inc.  Incorporated herein by reference to Post-
                    Effective Amendment No. 20 to Registrant's Registration
                    Statement on form N-1A filed on July 27, 1995.
                  
          (10)      Opinion of Counsel (filed herewith).     
              
          (11)      Consent of Independent Accountants (filed herewith).      

          (12)      Inapplicable.

          (13)      Inapplicable.

          (14)      Model Retirement Plan.  Incorporated herein by reference to
                    Post-Effective Amendment No. 20 to Registrant's Registration
                    Statement on form N-1A filed on July 27, 1995.
              
          (15) (a)  Distribution Plans pursuant to Rule 12b-1 (Class A Shares
                    and Class B Shares). Incorporated herein by reference to
                    Post-Effective Amendment No. 21 to Registrant's Registration
                    Statement on Form N-1A filed on July 19, 1996.     
                   
               (b)  Distribution Plan pursuant to Rule 12b-1 (Class C Shares) 
                    for the High Income Fund (filed herewith).      

          (16)      Schedule of Computation of Performance Quotations.
                    Incorporated herein by reference to Post-Effective Amendment
                    No. 21 to Registrant's Registration Statement on Form N-1A
                    filed on July 19, 1996.     
    
          (17)      Financial Data Schedules (filed herewith).     
    
          (18)      Amended Plan pursuant to Rule 18f-3 (filed herewith).

Other Exhibits

          (a)       Powers of Attorney. Incorporated herein by reference to 
                    Post-Effective Amendment No. 21 to Registrant's Registration
                    Statement on Form N-1A filed on July 19,1996    

ITEM 25.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT.

          There are no persons controlled by or under common control with
          Registrant.
<PAGE>
 
ITEM 26.  NUMBER OF HOLDERS OF SECURITIES.

<TABLE>    
<CAPTION>
 
 
                                    Class A Shares    Class B Shares    Class C Shares
                                   Number of Record  Number of Record  Number of Record
                                    Holders as of     Holders as of     Holders as of 
Title of Class                       May 31, 1998      May 31, 1998      May 31, 1998
- ---------------------------------  ----------------  ----------------  ----------------
<S>                                <C>               <C>               <C> 
U.S. Government Securities Fund               6,066             9,709                 -
Shares of Beneficial Interest
($.01 par value)
 
Federal Securities Fund                       2,681             1,229                 -
Shares of Beneficial Interest
($.01 par value)
 
Diversified Income Fund                       1,526             3,124                 -
Shares of Beneficial Interest
($.01 par value)
 
High Income Fund                              3,377             4,879               102
Shares of Beneficial Interest
($.01 par value)
 
Tax Exempt Insured Fund                       2,776               503                 -
Shares of Beneficial Interest
($.01 par value)
</TABLE>     
 
ITEM 27.  INDEMNIFICATION.


          Insofar as indemnification for liabilities arising under the
          Securities Act of 1933, as amended (the "Act") may be permitted to
          trustees, officers and controlling persons of the Registrant pursuant
          to the foregoing provisions, or otherwise, Registrant has been advised
          that in the opinion of the Securities and Exchange Commission such
          indemnification is against public policy as expressed in the Act and
          is, therefore, unenforceable.  In the event that a claim for
          indemnification against such liabilities (other than the payment by
          Registrant of expenses incurred or paid by a trustee, officer or
          controlling person of the Registrant in the successful defense of any
          action, suit or proceeding) is asserted against the Registrant by such
          trustee, officer or controlling person in connection with the
          securities being registered, Registrant will, unless in the opinion of
          its counsel the matter has been settled by the controlling precedent,
          submit to a court of appropriate jurisdiction the question whether
          such indemnification by it is against public policy as expressed in
          the Act and will be governed by the final adjudication of such issue.

Item 28.  Business and Other Connections of the Investment Adviser.

          Information concerning business and other connections of SunAmerica
          Asset Management Corp. ("SunAmerica") is incorporated herein by
          reference to SunAmerica's Form ADV (File No. 801-19813), which is
          currently on file with the Securities and Exchange Commission.

          Reference is also made to the caption "Management of the Fund" in the
          Prospectus constituting Part A of the Registration Statement and
          "Investment Adviser and Distributor" and "Trustees and Officers"
          constituting Part B of the Registration Statement.
<PAGE>

ITEM 29.  PRINCIPAL UNDERWRITERS.

     (a)  The principal underwriter of the Registrant also acts as principal
          underwriter for:
    
          SunAmerica Equity Funds
          SunAmerica Money Market Funds, Inc.
          Style Select Series, Inc.     

     (b)  The following persons are the officers and directors of SunAmerica
          Capital Services, Inc., the principal underwriter of Registrant's
          Shares:

<TABLE>     
<CAPTION> 

     Name and Principal           Position With       Position with the
     Business Address             Underwriter         Registrant
     ------------------           -----------         ---------------
<S>                                <C>                 <C> 
     J. Steven Neamtz             President           None
     The SunAmerica Center
     733 Third Avenue
     New York, NY  10017-3204

     James R. Belardi             Executive Vice      None
     SunAmerica Inc.              President
     1 SunAmerica Center
     Century City
     Los Angeles, CA 90067-6022

     Peter A. Harbeck             Director            President
     The SunAmerica Center
     733 Third Avenue
     New York, NY  10017-3204

     Gary W. Krat                 Director            None
     The SunAmerica Center
     733 Third Avenue
     New York, NY  10017-3204

     Robert M. Zakem              Executive Vice      Secretary &
     The SunAmerica Center        President,          and  Chief
     733 Third Avenue             General Counsel     Compliance
     New York, NY  10017-3204     and Director        Officer

     Susan L. Harris              Secretary           None
     SunAmerica Inc.
     1 Sun America Center
     Century City
     Los Angeles, CA  90067-6022

     Steven E. Rothstein          Treasurer           None
     The SunAmerica Center
     733 Third Avenue
     New York, NY  10017-3204
</TABLE>      
<PAGE>
 
     (c)  Inapplicable.

ITEM 30.  LOCATION OF ACCOUNTS AND RECORDS.

          SunAmerica Asset Management Corp., The SunAmerica Center, 733 Third
          Avenue, New York, NY 10017-3204, or an affiliate thereof, will
          maintain physical possession of each such accounts, books or other
          documents of Registrant, except for those maintained by Registrant's
          custodian, State Street Bank and Trust Company, 1776 Heritage Drive,
          North Quincy, MA 02171, and its affiliate, National Financial Data
          Services, P.O. Box 419572, Kansas City, MO 64141-6572.

ITEM 31.  MANAGEMENT SERVICES.

          Inapplicable.

ITEM 32.  UNDERTAKINGS.

     (c)  The Registrant hereby undertakes to furnish, upon request and without
          charge, to each person to whom a Prospectus is delivered a copy of the
          Registrant's latest annual report to shareholders.
<PAGE>
 
                                   SIGNATURES


            
     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, Registrant certifies that it meets all of the
requirements for effectiveness of the Post-Effective Amendment No. 24 to the
Registration Statement pursuant to Rule 485 (b) under the Securities Act of
1933, as amended, and that Registrant has duly caused the Post-Effective
Amendment No. 24 to the Registration Statement on Form N-1A to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York,
and the State of New York, on the 23rd day of July, 1998.     



                                    SUNAMERICA INCOME FUNDS

                                    By: /s/  Peter A. Harbeck
                                             ----------------
                                             Peter A. Harbeck,
                                             President

            
          Pursuant to the requirements of the Securities Act of 1933, as
amended, the Post-Effective Amendment No. 24 to Registrant's Registration
Statement on Form N-1A has been signed below by the following persons in the
capacities and on the dates indicated.     

<TABLE>             

<S>                     <C>                            <C>  
/s/ Peter A. Harbeck     President and Trustee          July 23, 1998
Peter A. Harbeck         (Principal Executive
                         Officer)

Peter C. Sutton*         Treasurer (Principal           July 23, 1998
                         Financial and Accounting
                         Officer)

S. James Coppersmith*    Trustee                        July 23, 1998

Samuel M. Eisenstat*     Trustee                        July 23, 1998

Stephen J. Gutman*       Trustee                        July 23, 1998

Peter McMillan III*      Trustee                        July 23, 1998

Sebastiano Sterpa*       Trustee                        July 23, 1998
</TABLE>     


*By: /s/Robert M. Zakem
     Robert M. Zakem,
     Attorney-in-Fact
<PAGE>
 
                            SUNAMERICA INCOME FUNDS
                                 EXHIBIT INDEX

    
<TABLE>     
<CAPTION> 
Exhibit No.             Name
- -----------             -----
<S>                     <C> 
         
    11                  Consent of Independent Auditors

    15(b)               Distribution Plan pursuant to Rule 12b-1 (Class C
                        Shares)

    18                  Amended Plan pursuant to Rule 18f-3.

    27                  Financial Data Schedules         
</TABLE>      

<PAGE>
 

                      Consent of Independent Accountants



    
We hereby consent to the use in the Statement of Additional Information 
constituting part of this Post-Effective Amendment No. 24 to the registration 
statement on Form N-1A (the "Registration Statement") of our report dated May 
12, 1998, relating to the financial statements and financial highlights of 
SunAmerica Income Funds, which appears in such Statement of Additional 
Information and to the incorporation by reference of our report into the 
Prospectus which constitutes part of this Registration Statement. We also 
consent to the reference to us under the heading "Additional Information - 
Independent Accountants and Legal Counsel" in such Statement of Additional 
Information and to the references to us under the headings "Financial 
Highlights" and "General Information - Independent Accountants and Legal 
Counsel" in such Prospectus.      

        
/s/ PricewaterhouseCoopers LLP      
PricewaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York
July 21, 1998      





<PAGE>
 
                         PLAN OF DISTRIBUTION PURSUANT
                                 10 RULE 12b-1
                               (CLASS C SHARES)

     

         PLAN OF DISTRIBUTION adopted as of the 20th day of November, 1997, by 
SunAmerica Income Funds, a Massachusetts business trust (the "Trust"), on behalf
of the Class C shares of its separately designated series, High Income Fund (the
"Fund").

                                  W I T N E S S E T H:
                                  -------------------

         WHEREAS, the Trust is registered under the Investment Company Act of 
1940, as amended (the "Act"), as an open-end management investment company; and

         WHEREAS, the Fund is a separately designated investment series of the 
Trust with its own investment objective, policies and purposes offering four 
separate classes of shares of beneficial interest, par value $.01 per share, of 
the Trust (the "Shares"); and

         WHEREAS, the Trust has entered into a Distribution Agreement with
SunAmerica Capital Services, Inc. (the "Distributor"), pursuant to which the
Distributor acts as the exclusive distributor and representative of the Trust in
the offer and sale of the Shares to public; and

         WHEREAS, the Trust desires to adopt this Distribution Plan (the "Plan")
pursuant to Rule 12b-1 under the Act, pursuant to which the Fund will pay an 
account maintenance fee and a distribution fee to the Distributor with respect 
to Class C shares of the Fund; and

         WHEREAS, the Board of Trustees of the Trust (the "Trustees") as a
whole, and the Trustees who are not interested persons of the Trust and who have
no direct or indirect financial interest in the operation of this Plan or in any
agreement relating hereto (the "12b-1 Trustees"), having determined, in the
exercise of reasonable business judgment and in light of their fiduciary duties
under state law and under Sections 36(a) and (b) of the Act, that there is a
reasonable likelihood that this Plan will benefit the Fund and its Class C
shareholders, have approved this Plan by votes cast in person at a meeting
called for the purpose of voting hereon and on any agreements related hereto;

          NOW THEREFORE, the Trust on behalf of the Fund hereby adopts this 
Plan on the following terms:

    1. Distribution Activities. The Fund shall pay the Distributor a
       -----------------------
distribution fee under the Plan at the end of each month at the annual rate of
0.75% of average daily net assets attributable to Class C shares of the Fund to
compensate the Distributor and certain securities firms ("Securities Firms") for
providing sales and promotional activities and services. Such activities and
services will relate to the sale, promotion and marketing of the Class C shares.
Such expenditures may consist of sales commissions to financial consultants for
selling Class C shares, compensation, sales incentives and payments to sales and
marketing personnel, and the payment of expenses incurred in its sales and
promotional activities, including advertising expenditures related to the Class
C shares of the Fund and the costs of preparing and distributing promotional
materials with respect to such

<PAGE>
 
         Class C shares. Payment of the distribution fee described in this
         Section 1 shall be subject to any limitations set forth in applicable
         regulations of the National Association of Securities Dealers, Inc.
         Nothing herein shall prohibit the Distributor from collecting
         distribution fees in any given year, as provided hereunder, in excess
         of expenditures made in such year for sales and promotional activities
         with respect to the Fund.

   2.    Account Maintenance Activities. The Fund shall pay the Distributor an
         ------------------------------  
         account maintenance fee under the Plan at the end of each month at the
         annual rate of up to 0.25% of average daily net assets attributable to
         Class C shares of the Fund to compensate the Distributor and Securities
         Firms for account maintenance activities.

   3.    Payments to Other Parties. The Fund hereby authorizes the Distributor
         -------------------------  
         to enter into agreements with Securities Firms to provide compensation
         to such Securities Firms for activities and services of the type
         referred to in Sections 1 and 2 hereof. The Distributor may reallocate
         all or a portion of its account maintenance fee or distribution fee to
         such Securities Firms as compensation for the above-mentioned
         activities and services. Such agreements shall provide that the
         Securities Firms shall deliver to the Distributor such information as
         is reasonably necessary to permit the Distributor to comply with the
         reporting requirements set forth in Section 5 hereof.

   4.    Related Agreements. All agreements with any person relating to
         ------------------
         implementation of this Plan shall be in writing, and any agreement
         related to this Plan shall provide:

                 (a)  that such agreement may be terminated at any time, without
                      payment of any penalty, by vote of a majority of the 12b-1
                      Trustees or, by vote of a majority of the outstanding
                      voting securities (as defined in the Act) of Class C
                      shares of the Fund, on not more than 60 days' written
                      notice to any other party to the agreement; and

                 (b)  that such agreement shall terminate automatically in the 
                      event of its assignment.

   5.    Quarterly Reports. The Treasurer of the Trust shall provide to the 
         -----------------
         Trustees and the Trustees shall review, at least quarterly, a written
         report of the amounts expended pursuant to this Plan with respect to
         Class C shares of the Fund and any related agreement and the purposes
         for which such expenditures were made.

   6.    Term and Termination. (a) This Plan shall become effective as of the
         -------------------- 
         date hereof, and, unless terminated as herein provided, shall continue
         from year to year thereafter, so long as such continuance is
         specifically approved at least annually by votes, cast in person at a
         meeting called for the purpose of voting on such approval, of a
         majority of both the (i) the Trustees of the Trust, and (ii) the 12b-1
         Trustees.

                 (b)  This Plan may be terminated at any time by vote of a
                      majority of the 12b-1 Trustees or by vote of a majority of
                      the outstanding voting securities (as defined in the Act)
                      of Class C shares of the Fund.

   7.    Amendments. This Plan may not be amended to increase materially the 
         ----------  
         maximum



<PAGE>
 

         expenditures permitted by Sections 1 and 2 hereof unless
         such amendment is approved by a vote of a majority of the
         outstanding voting securities (as defined in the Act) of
         Class C shares of the Fund, and no material amendment to
         this Plan shall be made unless approved in the manner
         provided for the annual renewal of this Plan in Section
         6(a) hereof.

8.       Selection and Nomination of Trustees. While this Plan is in effect, the
         ------------------------------------
         selection and nomination of those Trustees of the Trust who are not
         interested persons of the Trust shall be committed to the discretion of
         such disinterested Trustees.

9.       Recordkeeping. The Trust shall preserve copies of this Plan and any
         ------------- 
         related agreement and all reports made pursuant to Section 5 hereof for
         a period of not less than six years from the date of this Plan, any
         such related agreement or such reports, as the case may be, the first
         two years in an easily accessible place.

10.      Definition of Certain Terms. For purposes of this Plan, the terms
         ---------------------------
         "assignment," "interested person," "majority of the outstanding voting
         securities," and "principal underwriter" shall have their respective
         meanings defined in the Act and the rules and regulations thereunder,
         subject, however, to such exemptions as may be granted to either the
         Trust or the principal underwriter of the Shares by the Securities and
         Exchange Commission, or its staff under the Act.

11.      Separate Series. Pursuant to the provisions of the Declaration of
         ---------------
         Trust, the Fund is a separate series of the Trust, and all debts,
         liabilities and expenses of Class C shares of the Fund shall be
         enforceable only against the assets of Class C shares of the Fund and
         not against the assets of any other series or class of shares or of the
         Trust as a whole.


         IN WITNESS WHEREOF, the Trust has caused this Plan to be executed as of
the day and year first written above.


                                              SUNAMERICA INCOME FUNDS



                                            By: /s/ Peter A. Harbeck
                                               ------------------------------
                                               Peter A. Harbeck
                                               President




<PAGE>
 
                            SUNAMERICA INCOME FUNDS

                          PLAN PURSUANT TO RULE 18F-3

     SunAmerica Income Funds (the "Trust") hereby adopts this plan pursuant to 
Rule 18f-3 under the Investment Company Act of 1940, as amended (the "1940 
Act"), setting forth the separate arrangement and expense allocation of each 
class of shares.  Any material amendment to this plan is subject to prior 
approval of the Board of Trustees, including a majority of the disinterested 
Trustees.

                             CLASS CHARACTERISTICS


CLASS A SHARES:             Class A shares are subject to an initial sales
- --------------              charge, a distribution fee pursuant to Rule 12b-1
                            under the 1940 Act ("Rule 12b-1 fee") payable at the
                            annual rate of 0.10% of the average daily net assets
                            of the class, and an account maintenance fee under
                            the Rule 12b-1 Plan payable at the annual rate of up
                            to 0.25% of the average daily net assets of the
                            class. The initial sales charge is waived or reduced
                            for certain eligible investors. In certain cases, as
                            disclosed in the Prospectus and the Statement of
                            Additional Information from time to time, Class A
                            shares may be subject to a contingent deferred sales
                            charge ("CDSC") imposed at the time of redemption if
                            the initial sales charge with respect to such shares
                            was waived.

CLASS B SHARES:             Class B shares are not subject to an initial sales 
- --------------              charge but are subject to a CDSC which will be
                            imposed on certain redemptions, a Rule 12b-1 fee
                            payable at the annual rate of up to 0.75% of the
                            average daily net assets of the class, and an
                            account maintenance fee under the Rule 12b-1 Plan
                            payable at the annual rate of up to 0.25% of the
                            average daily net assets of the class. The CDSC is
                            waived for certain eligible investors. Class B
                            shares automatically convert to Class A shares on
                            the first business day of the month following the
                            seventh anniversary of the issuance of such Class B
                            shares.

CLASS C SHARES:             Class C shares are not subject to an initial sales 
- --------------              charge but are subject to a CDSC which will be
                            imposed on certain redemptions, a Rule 12b-1 fee
                            payable at the annual rate of up to 0.75% of the
                            average annual net assets of the class, and an
                            account maintenance fee under the Rule 12b-1 Plan
                            payable at the annual rate of up to 0.25% of the
                            average daily net assets of the class. The CDSC is
                            waived for certain eligible investors.




<PAGE>
 
 
CLASS II SHARES:  Class II shares are subject to an initial sales charge and a
- ---------------   CDSC which will be imposed on certain redemptions, a Rule 12b-
                  1 fee payable at the annual rate of up to 0.75% of the average
                  annual net assets of the class, and an account maintenance fee
                  under the Rule 12b-1 Plan payable at the annual rate of up to
                  0.25% of the average daily net assets of the class. The CDSC
                  is waived for certain eligible investors.

CLASS Z SHARES:   Class Z shares are not subject to either an initial or CDSC 
- --------------    nor are they subject to any Rule 12b-1 fee.


                        INCOME AND EXPENSE ALLOCATIONS

     Income, any realized and unrealized capital gains and losses, and expenses
     not allocated to a particular class, will be allocated to each class on the
     basis of the total value of each class of shares in relation to the total
     value of each class of shares of each series of the Trust (each a "Fund"
     and collectively, the "Funds").

                          DIVIDENDS AND DISTRIBUTIONS

     Dividends and other distributions paid by each Fund to each class of
     shares, to the extent paid, will be paid on the same day and at the same
     time, and will be determined in the same manner and will be in the same
     amount, except that the amount of the dividends and other distributions
     declared and paid by a particular class may be different from that paid by
     another class because of Rule 12b-1 fees and other expenses borne
     exclusively by that class.

                              EXCHANGE PRIVILEGE

     Each class of shares is generally exchangeable for the same class of shares
     (or the class of shares with similar characteristics), if any, of the other
     SunAmerica Mutual Funds (subject to certain minimum investment
     requirements) at the relative net asset value per share. Class II shares of
     a Fund may be exchanged for Class C shares of any other Fund or other
     SunAmerica Mutual Fund or Style Select Series, Inc. Portfolio which does
     not also offer Class II shares.

                              CONVERSION FEATURES

     Class B shares will convert automatically to Class A shares on the first
     business day of the month following the seventh anniversary of the issuance
     of such Class B shares. Conversions will be effected at the relative new
     asset values of Class B and Class A shares, without the imposition of any
     sales load, fee or charge. Class C, Class II and Class Z shares will have
     no conversion rights.

                                                                               2



<PAGE>
 
                                    GENERAL

A.  Each class of shares shall have exclusive voting rights on any matter
    submitted to shareholders that relates solely to its arrangement and shall
    have separate voting rights on any matter submitted to shareholders in which
    the interests of one class differ from the interests of any other class.

B.  On an ongoing basis, the Trustees, pursuant to their fiduciary
    responsibilities under the 1940 Act and otherwise, will monitor the Trust
    for the existence of any material conflicts among the interests of its
    several classes. The Trustees, including a majority of the disinterested
    Trustees, shall take such action as is reasonably necessary to eliminate any
    such conflicts that may develop. SunAmerica Asset Management Corp., the
    Trust's investment manager and adviser, will be responsible for reporting
    any potential or existing conflicts to the Trustees.

C.  For purposes of expressing an opinion on the financial statements of the
    Trust, the methodology and procedures for calculation the net asset value
    and dividends/distributions of the Trust's several classes and the proper
    allocation of income and expenses among such classes will be examined
    annually by the Trust's independent auditors who, in performing such
    examination, shall consider the factors set forth in the relevant auditing
    standards adopted, from time to time, by the American Institute of Certified
    Public Accountants and Financial Accounting Standards Board.






Dated:  May 21, 1998

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 011
   <NAME> HIGH INCOME FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      183,430,751<F1>
<INVESTMENTS-AT-VALUE>                     183,484,792<F1>
<RECEIVABLES>                                7,927,061<F1>
<ASSETS-OTHER>                                  29,472<F1>
<OTHER-ITEMS-ASSETS>                           812,672<F1>
<TOTAL-ASSETS>                             192,253,997<F1>
<PAYABLE-FOR-SECURITIES>                     8,656,239<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                    1,047,407<F1>
<TOTAL-LIABILITIES>                          9,703,646<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   204,965,873<F1>
<SHARES-COMMON-STOCK>                        7,250,438<F2>
<SHARES-COMMON-PRIOR>                        5,828,578<F2>
<ACCUMULATED-NII-CURRENT>                      439,881<F1>
<OVERDISTRIBUTION-NII>                               0<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    22,909,444<F1>
<ACCUM-APPREC-OR-DEPREC>                        54,041<F1>
<NET-ASSETS>                               182,550,351<F1>
<DIVIDEND-INCOME>                              193,979<F1>
<INTEREST-INCOME>                           15,827,269<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                             (2,924,697)<F1>
<NET-INVESTMENT-INCOME>                     13,096,551<F1>
<REALIZED-GAINS-CURRENT>                    11,229,258<F1>
<APPREC-INCREASE-CURRENT>                    2,889,820<F1>
<NET-CHANGE-FROM-OPS>                       27,215,629<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                 (12,405,053)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                      2,986,074<F2>
<NUMBER-OF-SHARES-REDEEMED>                (1,885,818)<F2>
<SHARES-REINVESTED>                            321,604<F2>
<NET-CHANGE-IN-ASSETS>                      43,027,989<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        267,317<F1>
<OVERDIST-NET-GAINS-PRIOR>                  37,738,392<F1>
<GROSS-ADVISORY-FEES>                        1,128,548<F1>
<INTEREST-EXPENSE>                               9,691<F1>
<GROSS-EXPENSE>                              2,928,556<F1>
<AVERAGE-NET-ASSETS>                        46,204,269<F2>
<PER-SHARE-NAV-BEGIN>                             7.06<F2>
<PER-SHARE-NII>                                   0.68<F2>
<PER-SHARE-GAIN-APPREC>                           0.68<F2>
<PER-SHARE-DIVIDEND>                            (0.64)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               7.78<F2>
<EXPENSE-RATIO>                                   1.52<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to SunAmerica High Income Fund as a whole.
<F2>Information given pertains to SunAmerica High Income Fund Class A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 012
   <NAME> HIGH INCOME FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      183,430,751<F1>
<INVESTMENTS-AT-VALUE>                     183,484,792<F1>
<RECEIVABLES>                                7,927,061<F1>
<ASSETS-OTHER>                                  29,472<F1>
<OTHER-ITEMS-ASSETS>                           812,672<F1>
<TOTAL-ASSETS>                             192,253,997<F1>
<PAYABLE-FOR-SECURITIES>                     8,656,239<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                    1,047,407<F1>
<TOTAL-LIABILITIES>                          9,703,646<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   204,965,873<F1>
<SHARES-COMMON-STOCK>                       16,031,814<F2>
<SHARES-COMMON-PRIOR>                       13,921,621<F2>
<ACCUMULATED-NII-CURRENT>                      439,881<F1>
<OVERDISTRIBUTION-NII>                               0<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    22,909,444<F1>
<ACCUM-APPREC-OR-DEPREC>                        54,041<F1>
<NET-ASSETS>                               182,550,351<F1>
<DIVIDEND-INCOME>                              193,979<F1>
<INTEREST-INCOME>                           15,827,269<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                             (2,924,697)<F1>
<NET-INVESTMENT-INCOME>                     13,096,551<F1>
<REALIZED-GAINS-CURRENT>                    11,229,258<F1>
<APPREC-INCREASE-CURRENT>                    2,889,820<F1>
<NET-CHANGE-FROM-OPS>                       27,215,629<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                 (12,405,053)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                      9,598,071<F2>
<NUMBER-OF-SHARES-REDEEMED>                (8,118,195)<F2>
<SHARES-REINVESTED>                            630,317<F2>
<NET-CHANGE-IN-ASSETS>                      43,027,989<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        267,317<F1>
<OVERDIST-NET-GAINS-PRIOR>                  37,738,392<F1>
<GROSS-ADVISORY-FEES>                        1,128,548<F1>
<INTEREST-EXPENSE>                               9,691<F1>
<GROSS-EXPENSE>                              2,928,556<F1>
<AVERAGE-NET-ASSETS>                       104,196,950<F2>
<PER-SHARE-NAV-BEGIN>                             7.07<F2>
<PER-SHARE-NII>                                   0.63<F2>
<PER-SHARE-GAIN-APPREC>                           0.69<F2>
<PER-SHARE-DIVIDEND>                            (0.60)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               7.79<F2>
<EXPENSE-RATIO>                                   2.13<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to SunAmerica High Income Fund as a whole.
<F2>Information given pertains to SunAmerica High Income Fund Class B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 013
   <NAME> HIGH INCOME FUND CLASS C
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             FEB-02-1998<F2>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      183,430,751<F1>
<INVESTMENTS-AT-VALUE>                     183,484,792<F1>
<RECEIVABLES>                                7,927,061<F1>
<ASSETS-OTHER>                                  29,472<F1>
<OTHER-ITEMS-ASSETS>                           812,672<F1>
<TOTAL-ASSETS>                             192,253,997<F1>
<PAYABLE-FOR-SECURITIES>                     8,656,239<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                    1,047,407<F1>
<TOTAL-LIABILITIES>                          9,703,646<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   204,965,873<F1>
<SHARES-COMMON-STOCK>                          147,022<F2>
<SHARES-COMMON-PRIOR>                                0<F2>
<ACCUMULATED-NII-CURRENT>                      439,881<F1>
<OVERDISTRIBUTION-NII>                               0<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    22,909,444<F1>
<ACCUM-APPREC-OR-DEPREC>                        54,041<F1>
<NET-ASSETS>                               182,550,351<F1>
<DIVIDEND-INCOME>                              193,979<F1>
<INTEREST-INCOME>                           15,827,269<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                             (2,924,697)<F1>
<NET-INVESTMENT-INCOME>                     13,096,551<F1>
<REALIZED-GAINS-CURRENT>                    11,229,258<F1>
<APPREC-INCREASE-CURRENT>                    2,889,820<F1>
<NET-CHANGE-FROM-OPS>                       27,215,629<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                 (12,405,053)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        146,640<F2>
<NUMBER-OF-SHARES-REDEEMED>                       (14)<F2>
<SHARES-REINVESTED>                                396<F2>
<NET-CHANGE-IN-ASSETS>                      43,027,989<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        267,317<F1>
<OVERDIST-NET-GAINS-PRIOR>                  37,738,392<F1>
<GROSS-ADVISORY-FEES>                        1,128,548<F1>
<INTEREST-EXPENSE>                               9,691<F1>
<GROSS-EXPENSE>                              2,928,556<F1>
<AVERAGE-NET-ASSETS>                           460,075<F2>
<PER-SHARE-NAV-BEGIN>                             7.70<F2>
<PER-SHARE-NII>                                   0.10<F2>
<PER-SHARE-GAIN-APPREC>                           0.07<F2>
<PER-SHARE-DIVIDEND>                            (0.08)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               7.79<F2>
<EXPENSE-RATIO>                                   2.10<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to SunAmerica High Income Fund as a whole.
<F2>Information given pertains to SunAmerica High Income Fund Class C.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 021
   <NAME> U.S. GOVERNMENT SECURITIES FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      330,077,862<F1>
<INVESTMENTS-AT-VALUE>                     333,849,040<F1>
<RECEIVABLES>                               40,858,873<F1>
<ASSETS-OTHER>                                  31,274<F1>
<OTHER-ITEMS-ASSETS>                             1,230<F1>
<TOTAL-ASSETS>                             374,740,417<F1>
<PAYABLE-FOR-SECURITIES>                    43,845,473<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                   25,449,002<F1>
<TOTAL-LIABILITIES>                         69,294,475<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   331,795,676<F1>
<SHARES-COMMON-STOCK>                       11,259,592<F2>
<SHARES-COMMON-PRIOR>                       13,546,280<F2>
<ACCUMULATED-NII-CURRENT>                            0<F1>
<OVERDISTRIBUTION-NII>                          60,738<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    30,136,631<F1>
<ACCUM-APPREC-OR-DEPREC>                     3,847,635<F1>
<NET-ASSETS>                               305,445,942<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                           29,715,115<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                             (7,340,425)<F1>
<NET-INVESTMENT-INCOME>                     22,374,690<F1>
<REALIZED-GAINS-CURRENT>                     3,606,429<F1>
<APPREC-INCREASE-CURRENT>                    5,679,162<F1>
<NET-CHANGE-FROM-OPS>                       31,660,281<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                 (18,175,582)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                      1,561,577<F2>
<NUMBER-OF-SHARES-REDEEMED>                (4,288,472)<F2>
<SHARES-REINVESTED>                            440,207<F2>
<NET-CHANGE-IN-ASSETS>                    (96,765,361)<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        318,396<F1>
<OVERDIST-NET-GAINS-PRIOR>                  37,684,511<F1>
<GROSS-ADVISORY-FEES>                        2,618,884<F1>
<INTEREST-EXPENSE>                               4,020<F1>
<GROSS-EXPENSE>                              7,340,425<F1>
<AVERAGE-NET-ASSETS>                       107,099,254<F2>
<PER-SHARE-NAV-BEGIN>                             8.35<F2>
<PER-SHARE-NII>                                   0.58<F2>
<PER-SHARE-GAIN-APPREC>                           0.21<F2>
<PER-SHARE-DIVIDEND>                            (0.48)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               8.66<F2>
<EXPENSE-RATIO>                                   1.63<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica U.S. Government fund as a whole.
<F2>Information given pertains to the SunAmerica U.S. Government Fund Class A.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 022
   <NAME> U.S. GOVERNMENT SECURITIES FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      330,077,862<F1>
<INVESTMENTS-AT-VALUE>                     333,849,040<F1>
<RECEIVABLES>                               40,858,873<F1>
<ASSETS-OTHER>                                  31,274<F1>
<OTHER-ITEMS-ASSETS>                             1,230<F1>
<TOTAL-ASSETS>                             374,740,417<F1>
<PAYABLE-FOR-SECURITIES>                    43,845,473<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                   25,449,002<F1>
<TOTAL-LIABILITIES>                         69,294,475<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   331,795,676<F1>
<SHARES-COMMON-STOCK>                       24,004,195<F2>
<SHARES-COMMON-PRIOR>                       34,580,049<F2>
<ACCUMULATED-NII-CURRENT>                            0<F1>
<OVERDISTRIBUTION-NII>                          60,738<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    30,136,631<F1>
<ACCUM-APPREC-OR-DEPREC>                     3,847,635<F1>
<NET-ASSETS>                               305,445,942<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                           29,715,115<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                             (7,340,425)<F1>
<NET-INVESTMENT-INCOME>                     22,374,690<F1>
<REALIZED-GAINS-CURRENT>                     3,606,429<F1>
<APPREC-INCREASE-CURRENT>                    5,679,162<F1>
<NET-CHANGE-FROM-OPS>                       31,660,281<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                 (18,175,582)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        482,064<F2>
<NUMBER-OF-SHARES-REDEEMED>               (11,930,767)<F2>
<SHARES-REINVESTED>                            872,849<F2>
<NET-CHANGE-IN-ASSETS>                    (96,765,361)<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        318,396<F1>
<OVERDIST-NET-GAINS-PRIOR>                  37,684,511<F1>
<GROSS-ADVISORY-FEES>                        2,618,884<F1>
<INTEREST-EXPENSE>                               4,020<F1>
<GROSS-EXPENSE>                              7,340,425<F1>
<AVERAGE-NET-ASSETS>                       248,305,623<F2>
<PER-SHARE-NAV-BEGIN>                             8.36<F2>
<PER-SHARE-NII>                                   0.52<F2>
<PER-SHARE-GAIN-APPREC>                           0.20<F2>
<PER-SHARE-DIVIDEND>                            (0.42)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               8.66<F2>
<EXPENSE-RATIO>                                   2.26<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica U.S. Government fund as a whole.
<F2>Information given pertains to the SunAmerica U.S. Government Fund Class B.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 031
   <NAME> FEDERAL SECURITIES FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                       52,815,438<F1>
<INVESTMENTS-AT-VALUE>                      53,665,181<F1>
<RECEIVABLES>                                3,142,901<F1>
<ASSETS-OTHER>                                  28,285<F1>
<OTHER-ITEMS-ASSETS>                               351<F1>
<TOTAL-ASSETS>                              56,836,718<F1>
<PAYABLE-FOR-SECURITIES>                     6,108,317<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                      264,203<F1>
<TOTAL-LIABILITIES>                          6,372,520<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                    48,909,767<F1>
<SHARES-COMMON-STOCK>                        2,868,465<F2>
<SHARES-COMMON-PRIOR>                        2,936,039<F2>
<ACCUMULATED-NII-CURRENT>                            0<F1>
<OVERDISTRIBUTION-NII>                          75,487<F1>
<ACCUMULATED-NET-GAINS>                        780,175<F1>
<OVERDISTRIBUTION-GAINS>                             0<F1>
<ACCUM-APPREC-OR-DEPREC>                       849,743<F1>
<NET-ASSETS>                                50,464,198<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                            3,563,623<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                               (847,343)<F1>
<NET-INVESTMENT-INCOME>                      2,716,280<F1>
<REALIZED-GAINS-CURRENT>                     1,918,591<F1>
<APPREC-INCREASE-CURRENT>                      928,406<F1>
<NET-CHANGE-FROM-OPS>                        5,563,277<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                  (2,570,829)<F1>
<DISTRIBUTIONS-OF-GAINS>                      (81,997)<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        374,888<F2>
<NUMBER-OF-SHARES-REDEEMED>                  (560,471)<F2>
<SHARES-REINVESTED>                            118,009<F2>
<NET-CHANGE-IN-ASSETS>                       1,025,828<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                         82,950<F1>
<OVERDIST-NET-GAINS-PRIOR>                   1,194,405<F1>
<GROSS-ADVISORY-FEES>                          259,246<F1>
<INTEREST-EXPENSE>                                   0<F1>
<GROSS-EXPENSE>                                847,343<F1>
<AVERAGE-NET-ASSETS>                        30,900,167<F2>
<PER-SHARE-NAV-BEGIN>                            10.39<F2>
<PER-SHARE-NII>                                   0.62<F2>
<PER-SHARE-GAIN-APPREC>                           0.63<F2>
<PER-SHARE-DIVIDEND>                            (0.59)<F2>
<PER-SHARE-DISTRIBUTIONS>                       (0.02)<F2>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.03<F2>
<EXPENSE-RATIO>                                   1.47<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica Federal Securities Fund as a
whole.
<F2>Information given pertains to the SunAmerica Federal Securities Fund Class A.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 032
   <NAME> FEDERAL SECURITIES FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                       52,815,438<F1>
<INVESTMENTS-AT-VALUE>                      53,665,181<F1>
<RECEIVABLES>                                3,142,901<F1>
<ASSETS-OTHER>                                  28,285<F1>
<OTHER-ITEMS-ASSETS>                               351<F1>
<TOTAL-ASSETS>                              56,836,718<F1>
<PAYABLE-FOR-SECURITIES>                     6,108,317<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                      264,203<F1>
<TOTAL-LIABILITIES>                          6,372,520<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                    48,909,767<F1>
<SHARES-COMMON-STOCK>                        1,703,670<F2>
<SHARES-COMMON-PRIOR>                        1,816,306<F2>
<ACCUMULATED-NII-CURRENT>                            0<F1>
<OVERDISTRIBUTION-NII>                          75,487<F1>
<ACCUMULATED-NET-GAINS>                        780,175<F1>
<OVERDISTRIBUTION-GAINS>                             0<F1>
<ACCUM-APPREC-OR-DEPREC>                       849,743<F1>
<NET-ASSETS>                                50,464,198<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                            3,563,623<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                               (847,343)<F1>
<NET-INVESTMENT-INCOME>                      2,716,280<F1>
<REALIZED-GAINS-CURRENT>                     1,918,591<F1>
<APPREC-INCREASE-CURRENT>                      928,406<F1>
<NET-CHANGE-FROM-OPS>                        5,563,277<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                  (2,570,829)<F1>
<DISTRIBUTIONS-OF-GAINS>                      (81,997)<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        358,787<F2>
<NUMBER-OF-SHARES-REDEEMED>                  (537,411)<F2>
<SHARES-REINVESTED>                             65,988<F2>
<NET-CHANGE-IN-ASSETS>                       1,025,828<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                         82,950<F1>
<OVERDIST-NET-GAINS-PRIOR>                   1,194,405<F1>
<GROSS-ADVISORY-FEES>                          259,246<F1>
<INTEREST-EXPENSE>                                   0<F1>
<GROSS-EXPENSE>                                847,343<F1>
<AVERAGE-NET-ASSETS>                        18,454,979<F2>
<PER-SHARE-NAV-BEGIN>                            10.42<F2>
<PER-SHARE-NII>                                   0.55<F2>
<PER-SHARE-GAIN-APPREC>                           0.63<F2>
<PER-SHARE-DIVIDEND>                            (0.52)<F2>
<PER-SHARE-DISTRIBUTIONS>                       (0.02)<F2>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.06<F2>
<EXPENSE-RATIO>                                   2.13<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica Federal Securities Fund as a
whole.
<F2>Information given pertains to the SunAmerica Federal Securities Fund Class B.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 041
   <NAME> DIVERSIFIED INCOME FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                       84,614,681<F1>
<INVESTMENTS-AT-VALUE>                      86,405,354<F1>
<RECEIVABLES>                                3,287,812<F1>
<ASSETS-OTHER>                                   3,991<F1>
<OTHER-ITEMS-ASSETS>                           448,692<F1>
<TOTAL-ASSETS>                              90,145,849<F1>
<PAYABLE-FOR-SECURITIES>                       623,618<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                      608,238<F1>
<TOTAL-LIABILITIES>                          1,231,856<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   111,648,509<F1>
<SHARES-COMMON-STOCK>                        5,449,294<F2>
<SHARES-COMMON-PRIOR>                        5,145,977<F2>
<ACCUMULATED-NII-CURRENT>                      191,746<F1>
<OVERDISTRIBUTION-NII>                               0<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    24,716,935<F1>
<ACCUM-APPREC-OR-DEPREC>                     1,790,673<F1>
<NET-ASSETS>                                88,913,993<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                            9,902,668<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                               1,851,718<F1>
<NET-INVESTMENT-INCOME>                      8,050,950<F1>
<REALIZED-GAINS-CURRENT>                     5,150,472<F1>
<APPREC-INCREASE-CURRENT>                      783,223<F1>
<NET-CHANGE-FROM-OPS>                       13,984,645<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                    7,637,194<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                      1,839,412<F2>
<NUMBER-OF-SHARES-REDEEMED>                (1,776,362)<F2>
<SHARES-REINVESTED>                            240,267<F2>
<NET-CHANGE-IN-ASSETS>                    (11,768,632)<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        217,383<F1>
<OVERDIST-NET-GAINS-PRIOR>                  29,872,034<F1>
<GROSS-ADVISORY-FEES>                          630,297<F1>
<INTEREST-EXPENSE>                               3,481<F1>
<GROSS-EXPENSE>                              1,851,718<F1>
<AVERAGE-NET-ASSETS>                        23,449,071<F2>
<PER-SHARE-NAV-BEGIN>                             4.39<F2>
<PER-SHARE-NII>                                   0.40<F2>
<PER-SHARE-GAIN-APPREC>                           0.27<F2>
<PER-SHARE-DIVIDEND>                            (0.38)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               4.68<F2>
<EXPENSE-RATIO>                                   1.45<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica Diversified Income Fund as a
whole.
<F2>Information given pertains to the SunAmerica Diversified Income Fund Class A.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 042
   <NAME> DIVERSIFIED INCOME FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                       84,614,681<F1>
<INVESTMENTS-AT-VALUE>                      86,405,354<F1>
<RECEIVABLES>                                3,287,812<F1>
<ASSETS-OTHER>                                   3,991<F1>
<OTHER-ITEMS-ASSETS>                           448,692<F1>
<TOTAL-ASSETS>                              90,145,849<F1>
<PAYABLE-FOR-SECURITIES>                       623,618<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                      608,238<F1>
<TOTAL-LIABILITIES>                          1,231,856<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   111,648,509<F1>
<SHARES-COMMON-STOCK>                       13,507,605<F2>
<SHARES-COMMON-PRIOR>                       17,734,431<F2>
<ACCUMULATED-NII-CURRENT>                      191,746<F1>
<OVERDISTRIBUTION-NII>                               0<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                    24,716,935<F1>
<ACCUM-APPREC-OR-DEPREC>                     1,790,673<F1>
<NET-ASSETS>                                88,913,993<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                            9,902,668<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                               1,851,718<F1>
<NET-INVESTMENT-INCOME>                      8,050,950<F1>
<REALIZED-GAINS-CURRENT>                     5,150,472<F1>
<APPREC-INCREASE-CURRENT>                      783,223<F1>
<NET-CHANGE-FROM-OPS>                       13,984,645<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                    7,637,194<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                      2,110,864<F2>
<NUMBER-OF-SHARES-REDEEMED>                (7,008,938)<F2>
<SHARES-REINVESTED>                            671,248<F2>
<NET-CHANGE-IN-ASSETS>                    (11,768,632)<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        217,383<F1>
<OVERDIST-NET-GAINS-PRIOR>                  29,872,034<F1>
<GROSS-ADVISORY-FEES>                          630,297<F1>
<INTEREST-EXPENSE>                               3,481<F1>
<GROSS-EXPENSE>                              1,851,718<F1>
<AVERAGE-NET-ASSETS>                        73,519,733<F2>
<PER-SHARE-NAV-BEGIN>                             4.40<F2>
<PER-SHARE-NII>                                   0.38<F2>
<PER-SHARE-GAIN-APPREC>                           0.26<F2>
<PER-SHARE-DIVIDEND>                            (0.35)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               4.69<F2>
<EXPENSE-RATIO>                                   2.06<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica Diversified Income Fund as a
whole.
<F2>Information given pertains to the SunAmerica Diversified Income Fund Class B.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 051
   <NAME> TAX EXEMPT INSURED CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      101,116,712<F1>
<INVESTMENTS-AT-VALUE>                     109,829,854<F1>
<RECEIVABLES>                                1,881,821<F1>
<ASSETS-OTHER>                                  20,847<F1>
<OTHER-ITEMS-ASSETS>                            71,604<F1>
<TOTAL-ASSETS>                             111,804,126<F1>
<PAYABLE-FOR-SECURITIES>                             0<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                      407,517<F1>
<TOTAL-LIABILITIES>                            407,517<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   106,133,060<F1>
<SHARES-COMMON-STOCK>                        6,791,093<F2>
<SHARES-COMMON-PRIOR>                        7,968,704<F2>
<ACCUMULATED-NII-CURRENT>                            0<F1>
<OVERDISTRIBUTION-NII>                         110,607<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                     3,338,986<F1>
<ACCUM-APPREC-OR-DEPREC>                     8,713,142<F1>
<NET-ASSETS>                               111,396,609<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                            6,714,012<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                               1,606,295<F1>
<NET-INVESTMENT-INCOME>                      5,107,717<F1>
<REALIZED-GAINS-CURRENT>                     3,208,746<F1>
<APPREC-INCREASE-CURRENT>                    3,147,644<F1>
<NET-CHANGE-FROM-OPS>                       11,464,107<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                  (5,004,780)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        139,133<F2>
<NUMBER-OF-SHARES-REDEEMED>                (1,483,284)<F2>
<SHARES-REINVESTED>                            166,540<F2>
<NET-CHANGE-IN-ASSETS>                    (12,032,240)<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        213,544<F1>
<OVERDIST-NET-GAINS-PRIOR>                   6,547,732<F1>
<GROSS-ADVISORY-FEES>                          582,729<F1>
<INTEREST-EXPENSE>                                   0<F1>
<GROSS-EXPENSE>                              1,606,295<F1>
<AVERAGE-NET-ASSETS>                        92,632,303<F2>
<PER-SHARE-NAV-BEGIN>                            12.35<F2>
<PER-SHARE-NII>                                   0.58<F2>
<PER-SHARE-GAIN-APPREC>                           0.67<F2>
<PER-SHARE-DIVIDEND>                            (0.57)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              13.03<F2>
<EXPENSE-RATIO>                                   1.24<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>Information given pertains to the SunAmerica Tax Exempt Insured Fund as a
whole.
<F2>Information given pertains to the SunAmerica Tax Exempt Insured Fund Class A.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 052
   <NAME> TAX EXEMPT INSURED CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997<F1>
<PERIOD-START>                             APR-01-1997<F1>
<PERIOD-END>                               MAR-31-1998<F1>
<INVESTMENTS-AT-COST>                      101,116,712<F1>
<INVESTMENTS-AT-VALUE>                     109,829,854<F1>
<RECEIVABLES>                                1,881,821<F1>
<ASSETS-OTHER>                                  20,847<F1>
<OTHER-ITEMS-ASSETS>                            71,604<F1>
<TOTAL-ASSETS>                             111,804,126<F1>
<PAYABLE-FOR-SECURITIES>                             0<F1>
<SENIOR-LONG-TERM-DEBT>                              0<F1>
<OTHER-ITEMS-LIABILITIES>                      407,517<F1>
<TOTAL-LIABILITIES>                            407,517<F1>
<SENIOR-EQUITY>                                      0<F1>
<PAID-IN-CAPITAL-COMMON>                   106,133,060<F1>
<SHARES-COMMON-STOCK>                        1,754,749<F2>
<SHARES-COMMON-PRIOR>                        2,028,803<F2>
<ACCUMULATED-NII-CURRENT>                            0<F1>
<OVERDISTRIBUTION-NII>                         110,607<F1>
<ACCUMULATED-NET-GAINS>                              0<F1>
<OVERDISTRIBUTION-GAINS>                     3,338,986<F1>
<ACCUM-APPREC-OR-DEPREC>                     8,713,142<F1>
<NET-ASSETS>                               111,396,609<F1>
<DIVIDEND-INCOME>                                    0<F1>
<INTEREST-INCOME>                            6,714,012<F1>
<OTHER-INCOME>                                       0<F1>
<EXPENSES-NET>                               1,606,295<F1>
<NET-INVESTMENT-INCOME>                      5,107,717<F1>
<REALIZED-GAINS-CURRENT>                     3,208,746<F1>
<APPREC-INCREASE-CURRENT>                    3,147,644<F1>
<NET-CHANGE-FROM-OPS>                       11,464,107<F1>
<EQUALIZATION>                                       0<F1>
<DISTRIBUTIONS-OF-INCOME>                  (5,004,780)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        338,073<F2>
<NUMBER-OF-SHARES-REDEEMED>                  (657,257)<F2>
<SHARES-REINVESTED>                             45,130<F2>
<NET-CHANGE-IN-ASSETS>                    (12,032,240)<F1>
<ACCUMULATED-NII-PRIOR>                              0<F1>
<ACCUMULATED-GAINS-PRIOR>                            0<F1>
<OVERDISTRIB-NII-PRIOR>                        213,544<F1>
<OVERDIST-NET-GAINS-PRIOR>                   6,547,732<F1>
<GROSS-ADVISORY-FEES>                          582,729<F1>
<INTEREST-EXPENSE>                                   0<F1>
<GROSS-EXPENSE>                              1,606,295<F1>
<AVERAGE-NET-ASSETS>                        23,913,493<F2>
<PER-SHARE-NAV-BEGIN>                            12.35<F2>
<PER-SHARE-NII>                                   0.49<F2>
<PER-SHARE-GAIN-APPREC>                           0.68<F2>
<PER-SHARE-DIVIDEND>                            (0.48)<F2>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              13.04<F2>
<EXPENSE-RATIO>                                   1.90<F2>
<AVG-DEBT-OUTSTANDING>                               0<F1>
<AVG-DEBT-PER-SHARE>                                 0<F1>
<FN>
<F1>INFORMATION GIVEN PERTAINS TO THE SUNAMERICA TAX EXEMPT INSURED FUND AS A
WHOLE.
<F2>INFORMATION GIVEN PERTAINS TO THE SUNAMERICA TAX EXEMPT INSURED FUND CLASS B.
</FN>
        

</TABLE>


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