PRINCIPAL HIGH YIELD FUND INC
497, 1997-09-18
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                       SUPPLEMENT DATED SEPTEMBER 19, 1997
                     TO THE PRINCIPAL MUTUAL FUND PROSPECTUS
                                DATED MAY 1, 1997


At the Special Meeting of Shareholders held September 16, 1997, the shareholders
of each Fund approved the following actions:

Effective January 1, 1998, the following changes will be made:

1.  Each  Fund  will  adopt an  Agreement  and Plan of  Reorganization  and
    Liquidation  under which the  existing  Funds will become an account of
    the Principal Variable Contracts Fund, Inc.

             Current Fund                          Account
             ------------                          -------
    Principal Balanced Fund, Inc.                  Balanced Account
    Principal Bond Fund, Inc.                      Bond Account
    Principal Capital Accumulation Fund, Inc.      Capital Value Account
    Principal Emerging Growth Fund, Inc.           MidCap Account
    Principal High Yield Fund, Inc.                High Yield Account
    Principal Money Market Fund, Inc.              Money Market Account

2.  Principal Capital Accumulation Fund,  Principal  Government  Securities
    Fund  and  Principal   Money  Market  Fund  each  will   eliminate  the
    fundamental   investment   restrictions   prohibiting   the  Fund  from
    purchasing  shares of other  investment  companies and  prohibiting the
    Fund from joint participation in any securities trading account.

3.  Principal  Capital  Accumulation  Fund will  eliminate the  fundamental
    investment restrictions prohibiting the Fund from purchasing restricted
    securities and from investing in repurchase  agreements.  The Fund will
    adopt a non-fundamental  investment restriction providing that the Fund
    may not "Invest  more than 15% of its total  assets in  securities  not
    readily marketable and in repurchase  agreements  maturing in more than
    seven days."

4.  Principal  Government  Securities  Fund  will  modify  the  fundamental
    investment restriction  prohibiting the Fund from purchasing other than
    obligations issued or guaranteed by the United States Government or its
    agencies or  instrumentalities.  The Fund will be permitted to maintain
    reasonable amounts in cash or purchase  short-term debt securities that
    are not issued or  guaranteed  by the United  States  Government or its
    agencies or instrumentalities.

5.  Principal  Money  Market  Fund will  amend the  fundamental  investment
    restrictions to allow the Fund to: i) invest more than 5% (but not more
    than 25%) of total Fund assets in the  securities  of a single  issuer;
    ii) purchase the securities of an issuer if the purchase does not cause
    more than 10% of the outstanding  voting securities of the issuer to be
    held by the Fund (other than  securities  issued or  guaranteed  by the
    United  States  Government or its agencies or  instrumentalities);  and
    iii) invest  that  percentage  of its total  assets in  securities  nor
    readily  marketable  as is  allowed  by  federal  securities  rules  or
    interpretations.

     The  Principal(R)  Mutual  Funds  ("Principal  Funds")  described  in  this
Prospectus  are a  family  of  separately  incorporated,  diversified,  open-end
management investment companies, commonly called mutual funds, which provide the
following range of investment objectives:

                             Growth-Oriented Funds

PRINCIPAL  Balanced Fund, Inc. seeks to generate a total
return  consisting of current  income and capital  appreciation  while  assuming
reasonable risks in furtherance of the investment objective.

PRINCIPAL Capital  Accumulation Fund, Inc. seeks to achieve primarily  long-term
capital  appreciation  and  secondary  growth of investment  income  through the
purchase  primarily  of  common  stocks,  but  the  Fund  may  invest  in  other
securities.

PRINCIPAL  Emerging Growth Fund,  Inc. seeks to achieve capital  appreciation by
investing  primarily  in  securities  of  emerging  and  other   growth-oriented
companies.

                              Income-Oriented Funds

PRINCIPAL  Bond  Fund,  Inc.  seeks to  provide  as high a level of income as is
consistent with preservation of capital and prudent investment risk.

PRINCIPAL High Yield Fund, Inc. seeks high current  income.  Capital growth is a
secondary  objective when  consistent with the objective of high current income.
The Fund seeks to achieve its objective  primarily  through the purchase of high
yielding,  lower or non-rated fixed income  securities  commonly  referred to as
"junk bonds." Bonds of this type are considered to be speculative with regard to
payment of interest and return of principal.  Purchasers should carefully assess
the risks associated with an investment in this fund.

                                Money Market Fund

PRINCIPAL Money Market Fund, Inc. seeks as high a level of income available from
short-term securities as is considered consistent with preservation of principal
and  maintenance  of liquidity by investing  all of its assets in a portfolio of
money market instruments.

     An investment in any of the funds is neither  insured nor guaranteed by the
U.S.  Government.  There can be no assurance the Money Market Funds will be able
to maintain a stable net asset value of $1.00 per share.

     This Prospectus concisely states information about the Principal Funds that
an investor ought to know before  investing.  It should be read and retained for
future reference.

     Additional  information  about the Funds has been filed with the Securities
and Exchange  Commission,  including a document  called  Statement of Additional
Information,  dated May 1, 1997.  The  Statement of  Additional  Information  is
incorporated  by  reference  into this  Prospectus.  A copy of the  Statement of
Additional Information can be obtained free of charge by writing or telephoning:

                             Principal Mutual Funds
                                   A Member of
                          The Principal Financial Group
                              Des Moines, IA 50392
                            Telephone 1-800-247-4123

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

                   The Date of this Prospectus is May 1, 1997.

                                TABLE OF CONTENTS

                                                                         Page

Summary  ...............................................................    3
Financial Highlights....................................................    5
Investment Objectives, Policies and Restrictions........................   10
Certain Investment Policies and Restrictions............................   15
Manager and Sub-Advisor  ...............................................   16
Duties Performed by the Manager and Sub-Advisor.........................   17
Managers' Comments......................................................   17
Determination of Net Asset Value of Fund Shares.........................   18
Performance Calculation.................................................   21
Income Dividends, Distributions and Tax Status..........................   21
Eligible Purchasers and Purchase of Shares..............................   22
Shareholder Rights .....................................................   23
Redemption of Shares....................................................   24
Additional Information..................................................   25

     This  Prospectus does not constitute an offer to sell, or a solicitation of
an offer to buy, the securities of any of the Funds in any jurisdiction in which
such sale,  offer to sell, or solicitation  may not be lawfully made. No dealer,
salesperson,  or other person has been  authorized to give any information or to
make any  representations,  other than those  contained in this  Prospectus,  in
connection with the offer contained in this  Prospectus,  and, if given or made,
such other information or representations must not be relied upon as having been
authorized by the Funds or the Funds' Manager.

SUMMARY

     The following summarized information should be read in conjunction with the
detailed information appearing elsewhere in this Prospectus.

     The  Principal  Funds are  separately  incorporated,  open-end  diversified
management investment companies.

Who may purchase shares of the Funds?

     Shares of the Funds are  available  only to Eligible  Purchasers  which are
limited to: (a) separate  accounts of Principal Mutual Life Insurance Company or
of other insurance companies; (b) Principal Mutual Life Insurance Company or any
subsidiary or affiliate thereof; (c) trustees or other managers of any qualified
profit  sharing,  incentive or bonus plan  established by Principal  Mutual Life
Insurance  Company or any  subsidiary or affiliate  thereof for the employees of
such  company,  subsidiary  or  affiliate.  The Board of  Directors of each Fund
reserves the right to broaden or limit the designation of Eligible Purchasers.

What do the Funds offer investors?

     Professional Investment Management: Experienced securities analysts provide
each Fund with professional investment management.

     Diversification: Each Fund will diversify by investing in securities issued
by a number of issuers doing business in a variety of industries  and/or located
in different geographical regions. Diversification reduces investment risk.

     Economies of Scale: Pooling individual shareholder's  investments in any of
the Funds creates administrative efficiencies.

     Redeemability:  Upon  request each Fund will redeem its shares and promptly
pay the  investor  the  current  net asset  value of the  shares  redeemed.  See
"Redemption of Shares."

What are the Funds' investment objectives?

                              Growth-Oriented Funds

     The  investment  objective  of Principal  Balanced  Fund,  Inc.  (sometimes
referred  to as the  Balanced  Fund)  is to seek  to  generate  a  total  return
consisting of current income and capital  appreciation while assuming reasonable
risks in  furtherance of this  objective.  The Fund intends to pursue a flexible
investment policy in seeking to achieve this investment objective.

     The primary  investment  objective of Principal Capital  Accumulation Fund,
Inc.  (sometimes  referred to as the  Capital  Accumulation  Fund) is  long-term
capital  appreciation  and its  secondary  investment  objective  is  growth  of
investment income.  The Fund seeks to achieve its investment  objectives through
the  purchase  primarily  of  common  stocks,  but the Fund may  invest in other
securities.

     The investment objective of Principal Emerging Growth Fund, Inc. (sometimes
referred to as the Emerging Growth Fund) is to achieve  capital  appreciation by
investing  primarily  in  securities  of  emerging  and  other   growth-oriented
companies.


                              Income-Oriented Funds

     The investment  objective of Principal Bond Fund, Inc.  (sometimes referred
to as the Bond Fund) is to  provide  as high a level of income as is  consistent
with preservation of capital and prudent investment risk.

     The  primary  investment  objective  of  Principal  High Yield  Fund,  Inc.
(sometimes  referred to as the High Yield Fund) is to seek high current  income.
Capital growth is a secondary  objective when  consistent  with the objective of
high current income.  The Fund will invest primarily in high yielding,  lower or
non-rated fixed income securities.

                                Money Market Fund

     The investment  objective of Principal Money Market Fund,  Inc.  (sometimes
referred  to as the  Money  Market  Fund) is to seek as high a level of  current
income  available from  short-term  securities as is considered  consistent with
preservation  of principal and  maintenance of liquidity by investing all of its
assets in a portfolio of money market instruments.

     There can be no  assurance  that the  investment  objectives  of any of the
Funds will be realized. See "Investment Objectives,  Policies and Restrictions."

Who serves as Manager for the Funds?

     Princor  Management  Corporation,   a  corporation  organized  in  1969  by
Principal Mutual Life Insurance  Company,  is the Manager for each of the Funds.
It is also the dividend  disbursing and transfer agent for the Principal  Funds.
In order to provide  investment  advisory  services for the Balanced  Fund,  the
Manager has executed a sub-advisory  agreement with Invista Capital  Management,
Inc.
("Invista" or "Sub-Advisor"). See "Manager and Sub-Advisor."

What fees and expenses apply to ownership of shares of the Funds?

     The following  table  depicts fees and expenses  applicable to the purchase
and ownership of shares of each of the Funds.

                                    ANNUAL FUND OPERATING EXPENSES
                                (As a Percentage of Average Net Assets)
                                 Management          Other       Total Operating
              Fund                   Fee           Expenses         Expenses

  Balanced Fund                     .60%             .03%             .63%
  Bond Fund                         .50%             .03%             .53%
  Capital Accumulation Fund         .48%             .01%             .49%
  Emerging Growth Fund              .64%             .02%             .66%
  High Yield Fund                   .60%             .10%             .70%
  Money Market Fund                 .50%             .06%             .56%

                                     EXAMPLE

     You would pay the following expenses on a $1,000  investment,  assuming (1)
     5% annual return and (2) redemption at the end of each time period:

                                                Period (in years)
                                   _____________________________________________
              Fund                   1            3            5            10

  Balanced Fund                     $6           $20          $35           $79
  Bond Fund                         $5           $17          $30           $66
  Capital Accumulation Fund         $5           $16          $27           $62
  Emerging Growth Fund              $7           $21          $37           $82
  High Yield Fund                   $7           $22          $39           $87
  Money Market Fund                 $6           $18          $31           $70

     This Example is based on the Annual Fund  Operating  expenses for each Fund
     described above.  Please remember that the Example should not be considered
     a representation of past or future expenses and that actual expenses may be
     greater or less than shown.

     The purpose of the above table is to assist the  investor in  understanding
the  various  expenses  that an  investor  in the Funds  will bear  directly  or
indirectly. See "Duties Performed by the Manager."

FINANCIAL HIGHLIGHTS

     The following financial  highlights for the periods ended December 31, 1996
and prior thereto are derived from financial  statements which have been audited
by Ernst & Young LLP, independent  auditors,  whose report has been incorporated
by reference herein. The financial highlights should be read in conjunction with
the  financial  statements,  related  notes,  and  other  financial  information
incorporated by reference herein.  Audited financial  statements may be obtained
by shareholders, without charge, by telephoning 1-800-451-5447.

<TABLE>
<CAPTION>
                                                      Income from
                                                  Investment Operations                          Less Distributions                 
                                           ___________________________________  ____________________________________________________
                                                       Net Realized
                                                            and                                                                     
                                 Net Asset              Unrealized    Total      Dividends                  Excess                  
                                 Value at      Net         Gain       from       from Net  Distributions Distributions              
                                 Beginning Investment    (Loss) on  Investment  Investment     from          from         Total     
                                 of Period   Income     Investments Operations    Income   Capital Gains Capital Gains Distributions
Principal Balanced 
Fund, Inc. (a)
  Year Ended December 31,
<S>                               <C>        <C>          <C>          <C>        <C>       <C>           <C>           <C>       
   1996                           $13.97     $  .40       $ 1.41       $1.81      $(.40)    $  (.94)      $  --         $(1.34)   
   1995                            11.95        .45         2.44        2.89       (.45)       (.42)         --           (.87)   
   1994                            12.77        .37         (.64)       (.27)      (.37)       (.18)         --           (.55)   
   1993                            12.58        .42          .95        1.37       (.42)       (.76)         --          (1.18)   
  Six Months Ended                                                                                                   
   December 31, 1992(b)            12.93        .23          .75         .98       (.47)       (.86)         --          (1.33)   
  Year Ended June 30,                                                                                                
   1992                            11.33        .47         1.61        2.08       (.48)        --           --           (.48)   
   1991                            10.79        .54          .59        1.13       (.57)       (.02)         --           (.59)   
   1990                            11.89        .60         (.48)        .12       (.63)       (.59)         --          (1.22)   
   1989                            11.75        .62          .30         .92       (.55)       (.23)         --           (.78)   
  Period Ended June 30,                                                                                              
   1988(e)                         10.00        .27         1.51        1.78       (.03)        --           --           (.03)   
                                                                                                                     
Principal Bond Fund, Inc.                                                                                            
  Year Ended December 31,                                                                                            
   1996                            11.73        .68         (.40)        .28       (.68)        --           --           (.68)   
   1995                            10.12        .62         1.62        2.24       (.63)        --           --           (.63)   
   1994                            11.16        .72        (1.04)       (.32)      (.72)        --           --           (.72)   
   1993                            10.77        .88          .38        1.26       (.87)        --           --           (.87)   
  Six Months Ended                                                                                                   
   December 31, 1992(b)            11.08        .45          .13         .58       (.89)        --           --           (.89)   
  Year Ended June 30,                                                                                                
   1992                            10.64        .91          .46        1.37       (.93)        --           --           (.93)   
   1991                            10.72        .94         (.06)        .88       (.96)        --           --           (.96)   
   1990                            10.92        .95         (.21)        .74       (.94)        --           --           (.94)   
   1989                            10.68       1.15          .17        1.32       (.96)       (.12)         --          (1.08)   
  Period Ended June 30,                                                                                              
   1988(e)                         10.00        .32          .40         .72       (.04)        --           --           (.04)   
                                                                                                                     
Principal Capital Accumulation                                                                                       
Fund, Inc.                                                                                                           
  Year Ended December 31,                                                                                            
   1996                            27.80        .57         5.82        6.39       (.58)      (3.77)         --          (4.35)   
   1995                            23.44        .60         6.69        7.29       (.60)      (2.33)         --          (2.93)   
   1994                            24.61        .62         (.49)        .13       (.61)       (.69)         --          (1.30)   
   1993                            25.19        .61         1.32        1.93       (.60)      (1.91)         --          (2.51)   
  Six Months Ended                                                                                                   
   December 31, 1992(b)            26.03        .31         1.84        2.15       (.64)      (2.35)         --          (2.99)   
  Year Ended June 30,                                                                                                
   1992                            23.35        .65         2.70        3.35       (.67)        --           --           (.67)   
   1991                            22.48        .74         1.22        1.96       (.79)       (.30)         --          (1.09)   
   1990                            23.63        .79          .14         .93       (.81)      (1.27)         --          (2.08)   
   1989                            23.23        .77         1.32        2.09       (.68)      (1.01)         --          (1.69)   
   1988                            27.51        .60        (1.50)       (.90)      (.69)      (2.69)         --          (3.38)   
   1987                            25.48        .40         4.46        4.86       (.50)      (2.33)         --          (2.83)   
                                                                                                                     
Principal Emerging Growth                                                                                            
Fund, Inc. (f)                                                                                                       
  Year Ended December 31,                                                                                            
   1996                            25.33        .22         5.07        5.29       (.22)       (.66)         --           (.88)   
   1995                            19.97        .22         5.57        5.79       (.22)       (.21)         --           (.43)   
   1994                            20.79        .14          .03         .17       (.14)       (.85)         --           (.99)   
   1993                            18.91        .17         3.47        3.64       (.17)      (1.59)         --          (1.76)   
  Six Months Ended                                                                                                   
   December 31, 1992(b)            15.97        .10         3.09        3.19       (.21)       (.04)         --           (.25)   
  Year Ended June 30,                                                                                                
   1992                            13.93        .21         2.04        2.25       (.21)        --           --           (.21)   
   1991                            14.25        .20          .50         .70       (.23)       (.79)         --          (1.02)   
   1990                            13.35        .24          .87        1.11       (.20)       (.01)         --           (.21)   
   1989                            12.85        .16         1.35        1.51       (.11)       (.90)         --          (1.01)   
  Period Ended June 30,                                                                                              
   1988(e)                         10.00        .05         2.83        2.88       (.03)        --           --           (.03)   
</TABLE>
<TABLE>
<CAPTION>
                                                                            Ratios/Supplemental Data                         
                                                            ______________________________________________________     
                                                                                                                       
                                                                                             Ratio of Net                          
                                    Net Asset                                 Ratio of     Investment                          
                                    Value at                Net Assets at   Expenses to     Income to    Portfolio     Average
                                      End of      Total     End of Period      Average       Average     Turnover    Commission
                                     Period      Return    (in thousands)    Net Assets    Net Assets      Rate         Rate   
                                  
Principal Balanced              
Fund, Inc. (a)                  
  Year Ended December 31,       
<S>                                 <C>          <C>          <C>              <C>           <C>           <C>          <C>    
   1996                             $14.44       13.13%       $  93,158        .63%          3.45%         22.6%        $.0417 
   1995                              13.97       24.58%          45,403        .66%          4.12%         25.7%          N/A  
   1994                              11.95       (2.09)%         25,043        .69%          3.42%         31.5%          N/A  
   1993                              12.77       11.06%          21,399        .69%          3.30%         15.8%          N/A  
  Six Months Ended                                                                                                             
   December 31, 1992(b)              12.58        8.00%(c)       18,842        .73%(d)       3.71%(d)      38.4%(d)       N/A  
  Year Ended June 30,                                                                                                          
   1992                              12.93       18.78%          17,344        .72%          3.80%         26.6%          N/A  
   1991                              11.33       11.36%          14,555        .73%          5.27%         27.1%          N/A  
   1990                              10.79         .87%          13,016        .74%          5.52%         33.1%          N/A  
   1989                              11.89        8.55%          12,751        .74%          5.55%         29.3%          N/A  
  Period Ended June 30,                                                                                                        
   1988(e)                           11.75       17.70%(c)       11,469        .80%(d)       4.96%(d)      41.7%(d)       N/A  
                                                                                                                               
Principal Bond Fund, Inc.                                                                                                      
  Year Ended December 31,                                                                                                      
   1996                              11.33        2.36%          63,387        .53%          7.00%          1.7%          N/A  
   1995                              11.73       22.17%          35,878        .56%          7.28%          5.9%          N/A  
   1994                              10.12       (2.90)%         17,108        .58%          7.86%         18.2%          N/A  
   1993                              11.16       11.67%          14,387        .59%          7.57%         14.0%          N/A  
  Six Months Ended                                                                                                             
   December 31, 1992(b)              10.77        5.33%(c)       12,790        .62%(d)       8.10%(d)       6.7%(d)       N/A  
  Year Ended June 30,                                                                                                          
   1992                              11.08       13.57%          12,024        .62%          8.47%          6.1%          N/A  
   1991                              10.64        8.94%          10,552        .63%          9.17%          2.7%          N/A  
   1990                              10.72        7.15%           9,658        .64%          9.09%          0.0%          N/A  
   1989                              10.92       13.51%           9,007        .64%          9.18%         12.2%          N/A  
  Period Ended June 30,                                                                                                        
   1988(e)                           10.68        6.06%(c)       17,598        .58%(d)       8.11%(d)      68.8%(d)       N/A  
                                                                                                                               
Principal Capital Accumulation                                                                                                 
Fund, Inc.                                                                                                                     
  Year Ended December 31,                                                                                                      
   1996                              29.84       23.50%         205,019        .49%          2.06%         48.5%         .0426 
   1995                              27.80       31.91%         135,640        .51%          2.25%         49.2%          N/A  
   1994                              23.44         .49%         120,572        .51%          2.36%         44.5%          N/A  
   1993                              24.61        7.79%         128,515        .51%          2.49%         25.8%          N/A  
  Six Months Ended                                                                                                             
   December 31, 1992(b)              25.19        8.81%(c)      105,355        .55%(d)       2.56%(d)      39.7%(d)       N/A  
  Year Ended June 30,                                                                                                          
   1992                              26.03       14.53%          94,596        .54%          2.65%         34.8%          N/A  
   1991                              23.35        9.46%          76,537        .53%          3.53%         14.0%          N/A  
   1990                              22.48        3.94%          74,008        .56%          3.56%         30.2%          N/A  
   1989                              23.63       10.02%          68,132        .57%          3.53%         23.5%          N/A  
   1988                              23.23       (2.67)%         62,696        .60%          2.76%         26.7%          N/A  
   1987                              27.51       22.17%          57,478        .63%          1.99%         16.1%          N/A  
                                                                                                                               
Principal Emerging Growth                                                                                                      
Fund, Inc. (f)                                                                                                                 
  Year Ended December 31,                                                                                                      
   1996                              29.74       21.11%         137,161        .66%          1.07%          8.8%         .0379 
   1995                              25.33       29.01%          58,520        .70%          1.23%         13.1%          N/A  
   1994                              19.97         .78%          23,912        .74%          1.15%         12.0%          N/A  
   1993                              20.79       19.28%          12,188        .78%           .89%         22.4%          N/A  
  Six Months Ended                                                                                                             
   December 31, 1992(b)              18.91       20.12%(c)        9,693        .81%(d)       1.24%(d)       8.6%(d)       N/A  
  Year Ended June 30,                                                                                                          
   1992                              15.97       16.19%           7,829        .82%          1.33%         10.1%          N/A  
   1991                              13.93        5.72%           6,579        .89%          1.70%         11.1%          N/A  
   1990                              14.25        8.32%           6,067        .88%          1.74%         17.9%          N/A  
   1989                              13.35       13.08%           5,509        .90%          1.31%         21.4%          N/A  
  Period Ended June 30,                                                                                                        
   1988(e)                           12.85       28.72%(c)        4,857        .94%(d)        .64%(d)       4.6%(d)       N/A  
</TABLE>
                                      
Notes to financial highlights                   
                                
(a)  Effective May 1, 1994, the name of Principal Managed Fund, Inc. was changed
     to Principal Balanced Fund, Inc.

(b)  Effective July 1, 1992 the fund changed its fiscal year end from June 30 to
     December 31.

(c)  Total return amounts have not been annualized.

(d)  Computed on an annualized basis.

(e)  Period  from  December  18,  1987,  date shares  first  offered to eligible
     purchasers,  through June 30, 1988. Net investment income  aggregating $.01
     per share for the period  from the  initial  purchase of shares on December
     10,  1987  through  December  17,  1987 was  recognized,  all of which  was
     distributed to the Fund's sole stockholder, Principal Mutual Life Insurance
     Company.  This  represented  activity  of the  fund  prior  to the  initial
     offering of shares to eligible purchasers.

(f)  Effective May 1, 1992, the name of Principal  Aggressive  Growth Fund, Inc.
     was changed to Principal Emerging Growth Fund, Inc.

<TABLE>
<CAPTION>
                                                      Income from
                                                  Investment Operations                          Less Distributions                 
                                           ___________________________________  ____________________________________________________
                                                       Net Realized
                                                            and                                                                     
                                 Net Asset              Unrealized    Total      Dividends                  Excess                  
                                 Value at      Net         Gain       from       from Net  Distributions Distributions              
                                 Beginning Investment    (Loss) on  Investment  Investment     from          from         Total     
                                 of Period   Income     Investments Operations    Income   Capital Gains Capital Gains Distributions
Principal High Yield 
Fund, Inc.
  Year Ended December 31,
<S>                             <C>        <C>          <C>          <C>         <C>          <C>           <C>        <C>       
   1996                         $   8.39   $  .80       $  .30       $1.10       $ (.77)      $  --         $  --      $  (.77)  
   1995                             7.91      .76          .51        1.27         (.77)       (.02)           --         (.79)  
   1994                             8.62      .77         (.72)        .05         (.76)         --            --         (.76)  
   1993                             8.38      .80          .23        1.03         (.79)         --            --         (.79)  
  Six Months Ended                                                                                      
   December 31, 1992(a)             8.93      .45         (.10)        .35         (.90)         --            --         (.90)  
  Year Ended June 30,                                                                                   
   1992                             8.28      .92          .66        1.58         (.93)         --            --         (.93)  
   1991                             8.96      .99         (.53)        .46        (1.14)         --            --        (1.14)  
   1990                            10.37     1.21        (1.35)       (.14)       (1.22)       (.05)           --        (1.27)  
   1989                            11.01     1.23         (.45)        .78        (1.21)       (.21)           --        (1.42)  
  Period Ended June 30,                                                                                 
   1988(d)                         10.00      .67          .49        1.16         (.15)         --            --         (.15)  
                                                                                                        
Principal Money Market                                                                                  
Fund, Inc.                                                                                              
  Year Ended December 31,                                                                               
   1996                             1.000     .049         --          .049        (.049)        --            --         (.049) 
   1995                             1.000     .054         --          .054        (.054)        --            --         (.054) 
   1994                             1.000     .037         --          .037        (.037)        --            --         (.037) 
   1993                             1.000     .027         --          .027        (.027)        --            --         (.027) 
  Six Months Ended                                                                                      
   December 31, 1992(a)             1.000     .016         --          .016        (.016)        --            --         (.016) 
  Year Ended June 30,                                                                                   
   1992                             1.000     .046         --          .046        (.046)        --            --         (.046) 
   1991                             1.000     .070         --          .070        (.070)        --            --         (.070) 
   1990                             1.000     .077         --          .077        (.077)        --            --         (.077) 
   1989                             1.000     .083         --          .083        (.083)        --            --         (.083) 
   1988                             1.000     .064         --          .064        (.064)        --            --         (.064) 
   1987                             1.000     .057         --          .057        (.057)        --            --         (.057) 
</TABLE>
<TABLE>
<CAPTION>
                                                                            Ratios/Supplemental Data                         
                                                            ______________________________________________________     
                                                                                                                       
                                                                                             Ratio of Net                          
                                    Net Asset                                 Ratio of     Investment                          
                                    Value at                Net Assets at   Expenses to     Income to    Portfolio     Average
                                      End of      Total     End of Period      Average       Average     Turnover    Commission
                                     Period      Return    (in thousands)    Net Assets    Net Assets      Rate         Rate   
Principal High Yield          
Fund, Inc.                    
  Year Ended December 31,     
<S>                                <C>           <C>          <C>              <C>           <C>           <C>           <C>   
   1996                            $  8.72       13.13%       $13,740          .70%          9.21%         32.0%         N/A
   1995                               8.39       16.08%        11,830          .73%          9.09%         35.1%         N/A
   1994                               7.91         .62%         9,697          .73%          9.02%         30.6%         N/A
   1993                               8.62       12.31%         9,576          .74%          8.80%         28.7%         N/A
  Six Months Ended                                                                                                          
   December 31, 1992(a)               8.38        4.06%(b)      8,924          .77%(c)      10.33%(c)      20.6%(c)      N/A
  Year Ended June 30,                                                                                                       
   1992                               8.93       20.70%         8,556          .77%         11.00%         31.3%         N/A
   1991                               8.28        6.35%         7,085          .82%         12.58%          6.4%         N/A
   1990                               8.96       (1.46)%        6,643          .83%         13.07%         24.2%         N/A
   1989                              10.37        7.88%         6,741          .95%         11.89%         27.8%         N/A
  Period Ended June 30,                                                                                                     
   1988(d)                           11.01       11.25%(b)      6,703          .78%(c)      11.71%(c)      58.2%(c)      N/A
                                                                                                                            
Principal Money Market                                                                                                      
Fund, Inc.                                                                                                                  
  Year Ended December 31,                                                                                                   
   1996                               1.000       5.07%        46,244          .56%          5.00%          N/A          N/A
   1995                               1.000       5.59%        32,670          .58%          5.32%          N/A          N/A
   1994                               1.000       3.76%        29,372          .60%          3.81%          N/A          N/A
   1993                               1.000       2.69%        22,753          .60%          2.64%          N/A          N/A
  Six Months Ended                                                                                                          
   December 31, 1992(a)               1.000       1.54%(b)     27,680          .59%(c)       3.10%(c)       N/A          N/A
  Year Ended June 30,                                                                                                       
   1992                               1.000       4.64%        25,194          .57%          4.54%          N/A          N/A
   1991                               1.000       7.20%        26,509          .56%          6.94%          N/A          N/A
   1990                               1.000       8.37%        26,588          .57%          8.05%          N/A          N/A
   1989                               1.000       8.59%        20,707          .61%          8.40%          N/A          N/A
   1988                               1.000       6.61%        14,571          .64%          6.39%          N/A          N/A
   1987                               1.000       5.78%        11,902          .65%          5.68%          N/A          N/A
</TABLE>
Notes to financial highlights

(a) Effective July 1, 1992 the fund changed its fiscal year end from June 30 to
    December 31.

(b) Total return amounts have not been annualized.

(c) Computed on an annualized basis.

(d) Period  from  December  18,  1987,  date  shares  first  offered to eligible
    purchasers,  through June 30, 1988. Net investment  income  aggregating $.01
    per share for the period from the initial purchase of shares on December 10,
    1987 through December 17, 1987 was recognized,  all of which was distributed
    to the Fund's sole  stockholder,  Principal  Mutual Life Insurance  Company.
    This  represented  activity  of the fund prior to the  initial  offering  of
    shares to eligible purchasers.

INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS

     The investment  objectives  and policies of each Fund are described  below.
There can be no assurance that the objectives of the Funds will be realized.

GROWTH-ORIENTED FUNDS

     The  Principal  Funds  currently  include  two  Funds  which  seek  capital
appreciation  through  investments  in  equity  securities   (Principal  Capital
Accumulation Fund and Principal Emerging Growth Fund) and one Fund which seeks a
total investment  return including both capital  appreciation and income through
investments in equity and debt securities (Principal Balanced Fund). These three
Funds are collectively referred to as the Growth-Oriented Funds.

     The  Growth-Oriented  Funds may invest in the following equity  securities:
common stocks;  preferred  stocks and debt securities that are convertible  into
common  stock,  that carry  rights or warrants to purchase  common stock or that
carry rights to participate  in earnings;  rights or warrants to subscribe to or
purchase any of the foregoing securities; and American Depository Receipts based
on any of the foregoing securities. The Capital Accumulation and Emerging Growth
Funds  will  seek  to be  fully  invested  under  normal  conditions  in  equity
securities.  When in the  opinion  of the  Manager  current  market or  economic
conditions warrant, a Growth-Oriented  Fund may for temporary defensive purposes
place all or a portion  of its  assets in cash,  on which the Fund would earn no
income,  cash equivalents,  bank certificates of deposit,  bankers  acceptances,
repurchase agreements, commercial paper, commercial paper master notes which are
floating  rate  debt  instruments  without  a  fixed  maturity,   United  States
Government securities, and preferred stocks and debt securities,  whether or not
convertible into or carrying rights for common stock. A Growth-Oriented Fund may
also maintain reasonable amounts in cash or short-term debt securities for daily
cash  management   purposes  or  pending   selection  of  particular   long-term
investments.

Principal Balanced Fund

     The investment  objective of Principal Balanced Fund is to generate a total
return  consisting of current  income and capital  appreciation  while  assuming
reasonable  risks  in  furtherance  of  the  investment   objective.   The  term
"reasonable risks" refers to investment decisions that in the Manager's judgment
do not  present  a  greater  than  normal  risk of loss in light of  current  or
anticipated future market and economic conditions, trends in yields and interest
rates, and fiscal and monetary policies.

     In seeking to achieve the investment objective,  the Fund invests primarily
in growth and income-oriented  common stocks (including  securities  convertible
into common stocks),  corporate bonds and debentures and short-term money market
instruments.  The Fund may also invest in other equity  securities,  and in debt
securities issued or guaranteed by the United States Government and its agencies
or  instrumentalities.  The Fund seeks to generate real (inflation  plus) growth
during  favorable  investment  periods  and may  emphasize  income  and  capital
preservation  strategies during uncertain  investment periods.  The Manager will
seek to minimize declines in the net asset value per share. However, there is no
guarantee that the Manager will be successful in achieving this goal.

     The portions of the Fund's total assets invested in equity securities, debt
securities  and  short-term  money market  instruments  are not fixed,  although
ordinarily  40% to 70% of the  Fund's  portfolio  will  be  invested  in  equity
securities with the balance of the portfolio  invested in debt  securities.  The
investment  mix will vary from time to time  depending  upon the judgment of the
Manager  as to general  market and  economic  conditions,  trends in  investment
yields and interest rates and changes in fiscal or monetary policies.

     The Fund may  invest  in all  types  of  common  stocks  and  other  equity
investments, without regard to any objective investment criteria such as size of
the issue or issuer, exchange listing or seasoning.  The Fund may invest in both
exchange-listed and  over-the-counter  securities,  in small or large companies,
and in well-established or unseasoned companies. Also, the Fund's investments in
corporate  bonds and debentures and money market  instruments are not restricted
by credit ratings or other objective investment criteria, except with respect to
bank  certificates  of  deposit  as set forth  below.  Some of the fixed  income
securities in which the Fund may invest may be considered to include speculative
characteristics  and the Fund may purchase such  securities  that are in default
but does not currently intend to invest more than 5% of its assets in securities
rated below BBB by Standard & Poor's or Baa by Moody's.  See the  discussion  of
the Principal High Yield Fund for information  concerning  risks associated with
below-investment  grade bonds.  The Fund will not concentrate its investments in
any industry.

     In selecting  common stocks,  the Manager seeks companies which the Manager
believes have predictable  earnings  increases and which,  based on their future
growth  prospects,  may be currently  undervalued  in the market  place.  During
periods  when the  Manager  determines  that  general  economic  conditions  are
favorable,  it will  generally  purchase  common  stocks with the  objective  of
long-term  capital  appreciation.  From time to time, and in periods of economic
uncertainty,  the Manager may purchase  common  stocks with the  expectation  of
price appreciation over a relatively short period of time.

     To achieve its investment  objective,  the Fund may at times  emphasize the
generation of interest  income by investing in short,  medium or long-term  debt
securities.  Investment  in debt  securities  may  also  be made  with a view to
realizing capital appreciation when the Manager believes that declining interest
rates may increase  market  values.  The Fund may also purchase  "deep  discount
bonds," i.e., bonds which are selling at a substantial  discount from their face
amount, with a view to realizing capital appreciation.

     The  short-term  money  market  investments  in which  the Fund may  invest
include the  following:  U.S.  Treasury  bills,  bank  certificates  of deposit,
bankers'  acceptances,  repurchase  agreements,  commercial paper and commercial
paper  master  notes which are floating  rate debt  instruments  without a fixed
maturity.  The Fund will only invest in domestic  bank  certificates  of deposit
issued by banks which are members of the Federal  Reserve System that have total
deposits in excess of one billion dollars.

     The  United  States  government  securities  in which  the Fund may  invest
include U.S. Treasury  obligations and obligations of certain agencies,  such as
the Government  National Mortgage  Association,  which are supported by the full
faith and credit of the United  States,  as well as obligations of certain other
Federal agencies or  instrumentalities,  such as the Federal  National  Mortgage
Association,  Federal  Land Banks and the Federal  Farm  Credit  Administration,
which are backed  only by the right of the issuer to borrow  limited  funds from
the U.S.  Treasury,  by the  discretionary  authority of the U.S.  Government to
purchase  such  obligations  or by the credit of the  agency or  instrumentality
itself.

Principal Capital Accumulation Fund

     The primary objective of Principal  Capital  Accumulation Fund is long-term
capital appreciation. A secondary objective is growth of investment income.

     The Fund will invest primarily in common stocks, but it may invest in other
securities.  In making  selections  for the  Fund's  investment  portfolio,  the
Manager will use an approach described broadly as that of fundamental  analysis,
which is discussed in the Statement of Additional Information. In pursuit of the
Fund's investment objectives,  investments will be made in securities which as a
group  appear to offer  long-term  prospects  for  capital  and  income  growth.
Securities  chosen for  investment  may  include  those of  companies  which the
Manager  believes  can  reasonably  be  expected  to share in the  growth of the
nation's economy over the long term.

Principal Emerging Growth Fund

     The  objective  of  Principal  Emerging  Growth Fund is to achieve  capital
appreciation.  The  strategy of this Fund is to invest  primarily  in the common
stocks and securities  (both debt and preferred  stock)  convertible into common
stocks of emerging and other growth-oriented  companies that, in the judgment of
the Manager,  are  responsive  to changes  within the  marketplace  and have the
fundamental  characteristics  to support  growth.  In pursuing its  objective of
capital  appreciation,  the Emerging  Growth Fund may invest,  for any period of
time, in any industry, in any kind of growth-oriented  company,  whether new and
unseasoned or well known and established.

     There  can be, of  course,  no  assurance  that the Fund  will  attain  its
objective.  Investment  in  emerging  and other  growth-oriented  companies  may
involve  greater risk than  investment  in other  companies.  The  securities of
growth-oriented  companies  may be  subject  to more  abrupt or  erratic  market
movements,  and many of them may have limited product lines, markets,  financial
resources or management. Because of these factors and of the length of time that
may be required  for full  development  of the growth  prospects  of some of the
companies  in which the Fund  invests,  the Fund  believes  that its  shares are
suitable  only  for  persons  who  are  prepared  to  experience   above-average
fluctuations  in net asset value,  to assume  above-average  investment  risk in
search  of  above-average  return,  and to  consider  the  Fund  as a  long-term
investment and not as a vehicle for seeking short-term profits.  Moreover, since
the  Fund  will not be  seeking  current  income,  investors  should  not view a
purchase of Fund shares as a complete investment program.

INCOME-ORIENTED FUNDS

     The Principal Funds currently  include two Funds which seek a high level of
income through investments in fixed-income  securities  (Principal Bond Fund and
Principal  High Yield Fund)  collectively  referred  to as the  "Income-Oriented
Funds." An investment in any of the Income-Oriented  Funds involves market risks
associated  with  movements  in interest  rates.  The market value of the Funds'
investments  will  fluctuate in response to changes in interest  rates and other
factors.  During periods of falling  interest  rates,  the values of outstanding
long-term fixed-income securities generally rise. Conversely,  during periods of
rising interest rates, the values of such securities generally decline.  Changes
by recognized rating agencies in their ratings of any fixed-income  security and
in the ability of an issuer to make  payments of interest and principal may also
affect  the  value of  these  investments.  Changes  in the  value of  portfolio
securities  will  affect the Funds'  net asset  values but will not affect  cash
income derived from the securities  unless a change results from a failure of an
issuer to pay interest or principal  when due.  Each Fund's  rating  limitations
apply at the time of acquisition of a security,  and any subsequent  change in a
rating by a rating  service will not require  elimination of a security from the
Fund's portfolio.  The Statement of Additional Information contains descriptions
of ratings of Moody's  Investors  Service,  Inc.  ("Moody's")  and  Standard and
Poor's Corporation ("S&P").

Principal Bond Fund

     The  investment  objective of  Principal  Bond Fund is to provide as high a
level of income as is  consistent  with  preservation  of  capital  and  prudent
investment risk.

     In seeking to achieve the investment objective, the Fund will predominantly
invest in marketable fixed-income securities. Investments will be made generally
on a long-term basis, but the Fund may make short-term  investments from time to
time as deemed  prudent by the  Manager.  Longer  maturities  typically  provide
better yields but will subject the Fund to a greater  possibility of substantial
changes in the values of its portfolio securities as interest rates change.

     Under  normal  circumstances,  the Fund  will  invest  at least  65% of its
assets,  exclusive  of cash  items,  in one or more of the  following  kinds  of
securities:  (i) corporate debt  securities and taxable  municipal  obligations,
which at the time of purchase  have an  investment  grade rating within the four
highest grades used by Standard & Poor's  Corporation  (AAA, AA, A or BBB) or by
Moody's Investors Service,  Inc. (Aaa, Aa, A or Baa) or which, if lower-rated or
nonrated,  are comparable in quality in the opinion of the Fund's Manager;  (ii)
similar Canadian corporate, Provincial and Federal Government securities payable
in U.S. funds;  and (iii)  securities  issued or guaranteed by the United States
Government  or its  agencies  or  instrumentalities.  The  balance of the Fund's
assets may be invested in other fixed income securities,  including domestic and
foreign  corporate debt  securities or preferred  stocks,  in common stocks that
provide  returns  that  compare  favorably  with  the  yields  on  fixed  income
investments, and in common stocks acquired upon conversion of debt securities or
preferred  stocks or upon exercise of warrants  acquired with debt securities or
otherwise and foreign government  securities.  The debt securities and preferred
stocks in which the Fund invests may be convertible or nonconvertible.  The Fund
does not intend to purchase debt  securities  rated lower than Ba3 by Moody's or
BB - by S & P (bonds which are judged to have speculative elements; their future
cannot be considered as well-assured).  See the discussion of the Principal High
Yield Fund for information  concerning  risks  associated with below  investment
grade bonds.

     During the year ended  December  31,  1996,  the  percentage  of the Fund's
portfolio  securities  invested in the various  ratings  established  by Moody's
based upon the weighted average ratings of the portfolio, was as follows:

      Moody's Rating                           Portfolio Percentage
           Aaa                                          .18%
           Aa                                           .81%
           A                                          24.05%
           Baa                                        68.04%
           Ba                                          6.92%

     * The  above  percentages  for A  rated  securities  include  .57%  unrated
securities  which  have  been  determined  by the  Manager  to be of  comparable
quality.

     Cash  equivalents in which the Fund invests  include  corporate  commercial
paper  rated  A-1+,  A-1 or A-2 by  Standard & Poor's or P-1 or P-2 by  Moody's,
unrated commercial paper issued by corporations with outstanding debt securities
rated in the four  highest  grades by  Standard  & Poor's and  Moody's  and bank
certificates  of  deposit  and  bankers'  acceptances  issued or  guaranteed  by
national or state banks and repurchase agreements considered by the Fund to have
investment quality.  Under unusual market or economic  conditions,  the Fund may
for temporary  defense  purposes invest up to 100% of its assets in cash or cash
equivalents.

Principal High Yield Fund

     Principal  High Yield Fund's primary  investment  objective is high current
income.  Capital  growth  is a  secondary  objective  when  consistent  with the
objective of high current income. This Fund is designed for investors willing to
assume additional risk in return for above average income.

     In seeking to attain the Fund's objective of high current income,  the Fund
invests primarily in high yielding,  lower or non-rated (high risk) fixed-income
securities, commonly known as "junk bonds," constituting a diversified portfolio
which  the Fund  Manager  believes  does not  involve  undue  risk to  income or
principal.  Normally, at least 80% of the Fund's assets will be invested in debt
securities,  convertible securities (both debt and preferred stock) or preferred
stocks that are consistent with its primary investment objective of high current
income. The Fund's remaining assets may be held in cash or cash equivalents,  or
invested  in common  stocks and other  equity  securities  when  these  types of
investments are consistent with the objective of high current income.

     The Fund  seeks to invest its  assets in  securities  rated Ba1 or lower by
Moody's Investors Service, Inc. ("Moody's") or BB+ or lower by Standard & Poor's
Corporation  ("S&P") or in unrated  securities which the Fund's Manager believes
are of  comparable  quality.  These  securities  are  regarded,  on balance,  as
predominantly  speculative with respect to the issuer's capacity to pay interest
and to repay principal in accordance with the terms of the obligation.  The Fund
will not invest in securities  rated Caa or lower by Moody's and CCC or lower by
S&P.

     The rating services'  descriptions of securities rating categories in which
the Fund may normally invest are as follows:

     Moody's Investors Service, Inc. Bond Ratings - 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 thereby 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 the  desirable
investment.  Assurance of interest and principal  payments or of  maintenance of
other terms of the contract over any long period of time may be small.

     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.

     Moody's may apply  numerical  modifiers,  1, 2 and 3 in each generic rating
classification  from Aa  through B in its bond  rating  system.  The  modifier 1
indicates  that  the  security  ranks  in the  high  end of its  generic  rating
category;  the  modifier  2  indicates  a  mid-range  ranking;  and a modifier 3
indicates that the issue ranks in the lower end of its generic rating category.

     Standard & Poor's  Corporation  Bond  Ratings - BB, B, CCC,  CC: Debt rated
"BB", "B", "CCC" and "CC" is regarded, on balance, as predominantly  speculative
with respect to capacity to pay interest and repay  principal in accordance with
the terms of the obligation. "BB" indicates the lowest degree of speculation and
"CC" 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 exposures to adverse conditions.

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

     The  higher-yielding,  lower-rated  securities in which the High Yield Fund
invests  present  special  risks to investors.  The market value of  lower-rated
securities  may be more  volatile  than  that  of  higher-rated  securities  and
generally tends to reflect the market's  perception of the  creditworthiness  of
the issuer and  short-term  market  developments  to a greater  extent than more
highly rated securities,  which reflect primarily fluctuations in general levels
of interest rates. Periods of economic uncertainty and change can be expected to
result in increased  volatility in the market value of  lower-rated  securities.
Further,  such  securities may be subject to greater risks of loss of income and
principal,  particularly in the event of adverse  economic  changes or increased
interest rates, because their issuers generally are not as financially secure or
as  creditworthy  as issuers of higher-rated  securities.  Additionally,  to the
extent  that there is not a national  market  system  for  secondary  trading of
lower-rated securities,  there may be a low volume of trading in such securities
which  may  make it more  difficult  to  value  or sell  those  securities  than
higher-rated securities. Adverse publicity and investor perceptions,  whether or
not based on fundamental analysis, may decrease the values and liquidity of high
yield securities, especially in a thinly traded market.

     Investors should recognize that the market for higher yielding, lower-rated
securities  is a relatively  recent  development  that has not been tested by an
economic  recession.  An economic  downturn may severely  disrupt the market for
such  securities and cause  financial  stress to the issuers which may adversely
affect the value of the  securities  held by the High Yield Fund and the ability
of the issuers of the  securities  held by it to pay principal  and interest.  A
default by an issuer may result in the Fund  incurring  additional  expenses  to
seek recovery of the amounts due it.

     Some of the securities in which the Fund invests  contain call  provisions.
If the issuer of such a  security  exercises  a call  provision  in a  declining
interest  rate  market,  the Fund  would  have to replace  the  security  with a
lower-yielding security, resulting in a decreased return for investors. Further,
a  higher-yielding  security's  value will  decrease in a rising  interest  rate
market, which will be reflected in the Fund's net asset value per share.

     Congress recently enacted legislation requiring  federally-insured  savings
and  loan  associations  to  divest  themselves  of  investments  in high  yield
securities.  This legislation might increase the supply of securities  available
for purchase in the secondary  market and,  potentially,  lower the value of the
securities held by the Fund.

     Investors  should  carefully  consider their ability to assume the risks of
investing in  lower-rated  securities  before  making an  investment in the High
Yield Fund and should be prepared to maintain their investment during periods of
adverse market conditions.
Investors should not rely on the Fund for their short-term financial needs.

     The Fund seeks to minimize the risks of investing in lower-rated securities
through   diversification,   investment   analysis  and   attention  to  current
developments in interest rates and economic conditions. Because the Fund invests
primarily in securities in the lower rating  categories,  the achievement of the
Fund's goals is more  dependent on the Manager's  ability than would be the case
if the Fund were  investing  in  securities  in the  higher  rating  categories.
Although the Fund's Manager  considers  security ratings when making  investment
decisions, it performs its own investment analysis and does not rely principally
on the  ratings  assigned  by the rating  services.  There are risks in applying
credit ratings as a method for evaluating  high yield  securities.  For example,
credit ratings evaluate the safety of principal and interest  payments,  not the
market value risk of high yield securities,  and credit rating agencies may fail
to make  timely  changes in credit  ratings to reflect  subsequent  events.  The
Manager's analysis includes traditional security analysis considerations such as
the issuer's experience and managerial  strength,  changing financial condition,
borrowing  requirements or debt maturity  schedules,  and its  responsiveness to
changes in business  conditions and interest rates.  It also considers  relative
values based on  anticipated  cash flow,  interest or dividend  coverage,  asset
coverage  and earnings  prospects.  In addition,  the Manager  analyzes  general
business  conditions and other factors such as  anticipated  changes in economic
activity and interest rates, the  availability of new investment  opportunities,
and the  economic  outlook for  specific  industries.  The Manager  continuously
monitors  the issuers of portfolio  securities  to determine if the issuers will
have  sufficient  cash flow and profits to meet required  principal and interest
payments and to assure the securities' liquidity so the Fund can meet redemption
requests.  During the year ended  December 31, 1996 the percentage of the Fund's
portfolio  securities  invested in the various  ratings  established by Moody's,
based upon the weighted average ratings of the portfolio, was as follows:

     Moody's Rating                           Portfolio Percentage
          Baa                                         2.63%
          Ba                                         38.86%
          B                                          56.47%
          C                                           2.04%

     The  above  percentages  for B and Ba rated  securities  include  2.72% and
- -1.13%,  respectively,  unrated  securities  which have been  determined  by the
Manager to be of comparable quality.

     There may be times  when,  in the  Manager's  judgment,  unusual  market or
economic   conditions  make  pursuing  the  Fund's  basic  investment   strategy
inconsistent  with the best  interests  of its  shareholders.  At such times the
Manager  may  employ  alternative   strategies,   primarily  seeking  to  reduce
fluctuations  in  the  value  of  the  Fund's  assets.  In  implementing   these
"defensive"  strategies,   the  Fund  may  temporarily  invest  in  money-market
instruments  of all types,  higher-rated  fixed-income  securities  or any other
fixed-income  securities that the Fund considers  consistent with such strategy.
The yield to  maturity on these  securities  would  generally  be lower than the
yield to maturity on lower-rated  fixed-income  securities.  It is impossible to
predict when, or for how long, such alternative strategies will be utilized.

     The Fund's Manager buys and sells  securities  for the Fund  principally in
response  to its  evaluation  of an  issuer's  continuing  ability  to meet  its
obligations,  the  availability  of  better  investment  opportunities,  and its
assessment of changes in business  conditions and interest  rates.  From time to
time,  consistent with its investment  objectives,  the Fund may sell securities
that have  appreciated  in value because of declines in interest  rates.  It may
also trade securities for the purpose of seeking short-term profits.  Securities
may be sold in  anticipation  of a market decline or bought in anticipation of a
market rise.  They may also be traded for  securities of comparable  quality and
maturity to take advantage of perceived short-term  disparities in market values
or yields.

MONEY MARKET FUND

     The  Principal  Funds  also  include  a Fund  which  invests  primarily  in
short-term  securities,  Principal  Money Market Fund.  Securities  in which the
Money Market Fund will invest may not yield as high a level of current income as
securities  of low  quality  and longer  maturities  which  generally  have less
liquidity, greater market risk and more fluctuation.

     The Money Market Fund will limit its portfolio investments to United States
dollar  denominated  instruments that its board of directors  determines present
minimal  credit  risks  and  which  are at the  time  of  acquisition  "Eligible
Securities" as that term is defined in  regulations  issued under the Investment
Company Act of 1940. Eligible Securities include:

     (1) A  security  with the  remaining  maturity  of 397 days or less that is
         rated (or that has been issued by an issuer that is rated in respect to
         a class of short-term  debt  obligations,  or any security  within that
         class,  that is  comparable in priority and security with the security)
         by a nationally  recognized  statistical rating  organization in one of
         the two highest rating categories for short-term debt obligations; or

     (2) A security at the time of issuance was a long-term  security that has a
         remaining  maturity of 397 calendar days or less,  and whose issuer has
         received from a nationally recognized statistical rating organization a
         rating,  with respect to a class of short-term debt obligations (or any
         security  within  that class) that is now  comparable  in priority  and
         security with the security, in one of the two highest rating categories
         for short-term debt obligations; or

     (3) An  unrated  security  that is of  comparable  quality  to a  security
         meeting the  requirements  of (1) or (2) above,  as  determined by the
         board of directors.

     The Fund will not invest more than 5% of its total assets in the  following
securities:

     (1) Securities  which,  when acquired by the Fund (either initially or upon
         any subsequent  rollover),  are rated below the highest rating category
         for short-term debt obligations;

     (2) Securities which, at the time of issuance were long-term securities but
         when  acquired  by the Fund have a remaining  maturity of 397  calendar
         days or less, if the issuer of such  securities is rated,  with respect
         to a class of comparable short-term debt obligations, below the highest
         rating category for short-term obligations;

     (3) Securities  which are unrated but are determined by the Fund's board of
         directors to be of  comparable  quality to  securities  rated below the
         highest rating category for short-term debt obligations.  The Fund will
         maintain a  dollar-weighted  average  portfolio  maturity of 90 days or
         less.

     The objective of Principal  Money Market Fund is to seek as high a level of
current income available from short-term  securities as is considered consistent
with  preservation  of principal and  maintenance  of liquidity by investing its
assets  in  a  portfolio  of  money  market  instruments.   These  money  market
instruments are U.S. Government  Securities,  U.S. Government Agency Securities,
Bank  Obligations,  Commercial Paper,  Short-term  Corporate Debt and Repurchase
Agreements,  which  are  described  briefly  below  and in  more  detail  in the
Statement of Additional Information.

     U.S. Government  Securities are securities issued or guaranteed by the U.S.
Government, including treasury bills, notes and bonds.

     U.S.  Government Agency Securities are obligations  issued or guaranteed by
agencies or  instrumentalities  of the U.S.  Government whether supported by the
full faith and credit of the U.S. Treasury or only by the credit of a particular
agency or instrumentality.

     Bank  Obligations  consist of  certificates  of deposit which are generally
negotiable  certificates issued against funds deposited in a commercial bank for
a definite period of time and earning a specified return and bankers acceptances
which are time  drafts  drawn on a  commercial  bank by a  borrower,  usually in
connection with international commercial transactions.

     Commercial  Paper is  short-term  promissory  notes issued by  corporations
primarily to finance short-term credit needs.

     Short-term  Corporate Debt consists of notes,  bonds or debentures which at
the time of purchase have one year or less remaining to maturity.

     Repurchase Agreements are transactions under which securities are purchased
from a bank or  securities  dealer with an agreement by the seller to repurchase
the securities at the same price plus interest at a specified  rate.  Generally,
Repurchase  Agreements  are of short  duration,  usually less than a week but on
occasion for longer periods.

     The  Fund  intends  to hold  its  investments  until  maturity,  but may on
occasion trade securities to take advantage of market variations.  Also, revised
valuations  of an  issuer  or  redemptions  may  result  in sales  of  portfolio
investments prior to maturity or at times when such sales might otherwise not be
desirable.  The Fund's right to borrow to facilitate  redemptions may reduce the
need for  such  sales.  It is the  Fund's  policy  to be as  fully  invested  as
reasonably practical at all times to maximize current income.

     Since portfolio assets will consist of short-term instruments,  replacement
of portfolio securities will occur frequently.  However,  since the Fund expects
to usually transact purchases and sales of portfolio  securities with issuers or
dealers  on a net  basis,  it is not  anticipated  that  the  Fund  will pay any
significant  brokerage  commissions.  The Fund is free to dispose  of  portfolio
securities at any time, when changes in  circumstances or conditions make such a
move desirable in light of the investment objective.

     A  shareholder's  rate of return will vary with the general  interest  rate
levels applicable to the money market instruments in which the Fund invests. The
rate of return and the net asset value will be affected by such other factors as
sales  of  portfolio  securities  prior to  maturity  and the  Fund's  operating
expenses.

CERTAIN INVESTMENT POLICIES AND RESTRICTIONS

     Following is a discussion of certain  investment  practices  that the Funds
may use in an effort to achieve their respective investment objectives.

Diversification

     Each Fund is subject to the diversification  requirements of Section 817(h)
of the Internal  Revenue Code (the "Code")  which must be met at the end of each
quarter of the year (or within 30 days  thereafter).  Regulations  issued by the
Secretary  of the Treasury  have the effect of requiring  each Fund to invest no
more than 55% of its total assets in securities of any one issuer,  no more than
70% in the securities of any two issuers,  no more than 80% in the securities of
any three  issuers,  and no more than 90% in the securities of any four issuers.
For this purpose, the United States Treasury and each U.S. Government agency and
instrumentality  is considered to be a separate  issuer.  Thus,  the  Government
Securities Fund intends to invest in U.S. Treasury  securities and in securities
issued by at least four U.S.  Government  agencies or  instrumentalities  in the
amounts necessary to meet those diversification  requirements at the end of each
quarter of the year (or within thirty days thereafter).

     In the event any of the Funds do not meet the diversification  requirements
of Section 817(h) of the Code, the contracts  funded by shares of the Funds will
not be treated as annuities or life  insurance  for Federal  income tax purposes
and the owners of the Funds will be subject to  taxation  on their  share of the
dividends and distributions paid by the Funds.

Foreign Securities

   
Each of the following  Principal Funds has adopted investment  restrictions that
limit its investments in foreign  securities to the indicated  percentage of its
assets:  Bond,  Capital  Accumulation  and High Yield - 20%;  Balanced  Fund and
Emerging Growth - 10%. Debt securities issued in the United States pursuant to a
registration statement filed with the Securities and Exchange Commission are not
considered  "foreign  securities"  for purposes of this  investment  limitation.
Investment  in  foreign  securities   presents  certain  risks  including  those
resulting  from  fluctuations  in  currency   exchange  rates,   revaluation  of
currencies,  the  imposition  of foreign  taxes,  future  political and economic
developments  including  war,  expropriations,   nationalization,  the  possible
imposition of currency exchange controls and other foreign  governmental laws or
restrictions, reduced availability of public information concerning issuers, and
the fact that foreign issuers are not generally  subject to uniform  accounting,
auditing and financial reporting standards or to other regulatory  practices and
requirements  comparable  to those  applicable  to domestic  issuers.  Moreover,
securities  of many  foreign  issuers may be less  liquid and their  prices more
volatile than those of comparable domestic issuers. In addition, transactions in
foreign  securities may be subject to higher costs,  and the time for settlement
of transactions in foreign  securities may be longer than the settlement  period
for domestic issuers.  A Fund's investment in foreign securities may also result
in higher custodial costs and the costs associated with currency conversions.
    

Repurchase Agreements

     Each  of the  Funds,  except  the  Capital  Accumulation,  may  enter  into
repurchase   agreements  with,  and  each  of  the  Funds,  except  the  Capital
Accumulation  and Money Market  Funds,  may lend its  portfolio  securities  to,
unaffiliated   broker-dealers   and  other  unaffiliated   qualified   financial
institutions.  These transactions must be fully collateralized at all times, but
involve  some credit risk to the Fund if the other party  should  default on its
obligations,  and the  Fund is  delayed  or  prevented  from  recovering  on the
collateral.  See the Funds'  Statement  of  Additional  Information  for further
information regarding the credit risks associated with repurchase agreements and
the  standards  adopted by each  Fund's  Board of  Directors  to deal with those
risks.  None of the Funds intend either (i) to enter into repurchase  agreements
that mature in more than seven days if any such  investment,  together  with any
other illiquid securities held by the Fund, would amount to more than 10% of its
total assets or (ii) to loan securities in excess of 30% of its total assets.

Forward Commitments

     From time to time,  each of the Funds may  enter  into  forward  commitment
agreements  which call for the Fund to  purchase  or sell a security on a future
date and at a price fixed at the time the Fund enters into the  agreement.  Each
of these Funds may also acquire rights to sell its investments to other parties,
either on demand or at specific intervals.

Warrants

     Each of the Funds,  except the Money Market Fund, may invest in warrants up
to 5% of its assets,  of which not more than 2% may be invested in warrants that
are not listed on the New York or American Stock Exchange.

Borrowing

     As a matter of  fundamental  policy,  each Fund may  borrow  money only for
temporary  or  emergency  purposes.   The  Balanced  Fund,  Bond  Fund,  Capital
Accumulation  Fund,  High Yield Fund and Money  Market Fund may borrow only from
banks.  Further,  each may  borrow  only in an amount  not  exceeding  5% of its
assets,  except the Capital Accumulation Fund which may borrow only in an amount
not exceeding  the lesser of (i) 5% of the value of its assets less  liabilities
other than such borrowings,  or (ii) 10% of its assets taken at cost at the time
the  borrowing  is made,  and the Money  Market Fund which may borrow only in an
amount not  exceeding  the lesser of (i) 5% of the value of its assets,  or (ii)
10% of the value of its net assets  taken at cost at the time the  borrowing  is
made.

Options

     The Balanced Fund, Bond Fund,  Emerging Growth Fund and High Yield Fund may
purchase  covered spread options,  which would give the Fund the right to sell a
security that it owns at a fixed dollar  spread or yield spread in  relationship
to  another  security  that  the  Fund  does  not  own,  but  which is used as a
benchmark.  These  same  Funds  may also  purchase  and sell  financial  futures
contracts,  options on financial futures contracts and options on securities and
securities  indices,  but will not  invest  more than 5% of their  assets in the
purchase of options on  securities,  securities  indices and  financial  futures
contracts or in initial margin and premiums on financial  futures  contracts and
options  thereon.  The Funds may write  options  on  securities  and  securities
indices to generate  additional  revenue and for hedging  purposes and may enter
into  transactions in financial futures contracts and options on those contracts
for hedging purposes.

     The  Statement  of  Additional  Information  includes  further  information
concerning   the  Funds'   investment   policies   and   applicable   investment
restrictions.   Each  Fund's   investment   objective  and  certain   investment
restrictions  designated  as  such  in  this  Prospectus  or  the  Statement  of
Additional  Information are fundamental policies that may not be changed without
shareholder approval.  All other investment policies described in the Prospectus
and the Statement of Additional  Information  for a Fund are not fundamental and
may be  changed  by the  Board  of  Directors  of the Fund  without  shareholder
approval.

MANAGER AND SUB-ADVISOR

     The  Manager  for  the  Funds  is  Princor   Management   Corporation  (the
"Manager"),  an  indirectly  wholly-owned  subsidiary  of Principal  Mutual Life
Insurance  Company,  a mutual life insurance company organized in 1879 under the
laws of the State of Iowa. The address of the Manager is The Principal Financial
Group,  Des Moines,  Iowa 50392.  The Manager was organized on January 10, 1969,
and since that time has managed  various  mutual  funds  sponsored  by Principal
Mutual Life  Insurance  Company.  As of December 31, 1996, the Manager served as
investment  advisor for 26 such funds with assets  totaling  approximately  $4.0
billion.

     The Manager has executed an agreement with Invista Capital Management, Inc.
("Invista")  under  which  Invista has agreed to assume the  obligations  of the
Manager to provide  investment  advisory  services  for the Balanced  Fund.  The
Manager  will  reimburse  Invista  for the  cost of  providing  these  services.
Invista,  an  indirectly   wholly-owned  subsidiary  of  Principal  Mutual  Life
Insurance  company  and an  affiliate  of the  Manager,  was founded in 1985 and
manages  investments for  institutional  investors,  including  Principal Mutual
Life.  Assets under  management  at December 31, 1996 were  approximately  $19.6
billion.  Invista's  address is 1500 Hub Tower,  699 Walnut,  Des  Moines,  Iowa
50309.

     The  Manager  or Invista  has  assigned  certain  individuals  the  primary
responsibility  for the  day-to-day  management  of each Fund's  portfolio.  The
persons  primarily  responsible  for the day-to-day  management of each Fund are
identified in the table below:

<TABLE>
<CAPTION>
                             Primarily
         Fund            Responsible Since                                  Person Primarily Responsible
- --------------------     -----------------           -----------------------------------------------------------------------------
<S>                      <C>                         <C>                                                         
Balanced                 April, 1993                 Judith  A.  Vogel,  CFA  (BA  degree,  Central  College). Vice President, 
                                                     Invista Capital Management, Inc.

Bond                     November, 1996              Scott A. Bennett, CFA (MBA  degree, University  of  Iowa)  Assistant  Director
                                                     Investment Securities, Principal Mutual Life Insurance Company.

Capital Accumulation     November, 1969              David L. White, CFA (BBA degree, University of Iowa). Executive Vice President,
                           (Fund's inception)        Invista Capital Management, Inc.; Co-Manager since November, 1996: Catherine A.
                                                     Green, CFA, (MBA degree, Drake University). Vice President, Invista Capital
                                                     Management, Inc.

Emerging Growth          December, 1987              Michael R. Hamilton, (BMBA degree, Bellarmine College). Vice President, Invista
                           (Fund's inception)        Capital Management, Inc.

High Yield               December, 1987              James K. Hovey, CFA (MBA degree University of Iowa). Director - Investment
                           (Fund's inception)        Securities, Principal Mutual Life Insurance Company.
</TABLE>

DUTIES PERFORMED BY THE MANAGER AND SUB-ADVISOR

     Under  Maryland  law,  the  business  and  affairs of each of the Funds are
managed under the direction of its Board of Directors.  The investment  services
and certain  other  services  referred to under the heading  "Cost of  Manager's
Services" in the Statement of Additional  Information are furnished to the Funds
under  the terms of a  Management  Agreement  between  each of the Funds and the
Manager, and for the Balanced Fund, a Sub-Advisory Agreement between the Manager
and Invista.  The Manager, or Invista,  advises the Funds on investment policies
and on the  composition  of the  Funds'  portfolios.  In  this  connection,  the
Manager,  or  Invista,  furnishes  to the  Board  of  Directors  of each  Fund a
recommended  investment program consistent with that Fund's investment objective
and policies.  The Manager, or Invista,  is authorized,  within the scope of the
approved  investment  program, to determine which securities are to be bought or
sold, and in what amounts.

     The compensation paid by each Fund to the Manager for the fiscal year ended
December 31, 1996 was, on an annual basis, equal to the following  percentage of
average net assets: 
                                                        Total
                                        Manager's     Annualized 
                Fund                       Fee         Expenses
         Balanced Fund                    .60%          .63%
         Bond Fund                        .50%          .53%
         Capital Accumulation Fund        .48%          .49%
         Emerging Growth Fund             .64%          .66%
         High Yield Fund                  .60%          .70%
         Money Market Fund                .50%          .56%

   
     The Manager,  or Invista,  may purchase at its own expense  statistical and
other information or services from outside sources,  including  Principal Mutual
Life Insurance  Company.  An Investment Service Agreement between each Fund, the
Manager and Principal  Mutual Life  Insurance  Company  provides that  Principal
Mutual Life  Insurance  Company will  furnish  certain  personnel,  services and
facilities  required by the Manager in connection  with its  performance  of the
Management Agreements, and that the Manager will reimburse Principal Mutual Life
Insurance Company for its costs incurred in this regard.  The Investment Service
Agreements for the Capital  Accumulation  and Emerging  Growth also include as a
party Invista Capital Management, Inc., an indirectly wholly-owned subsidiary of
Principal Mutual Life Insurance Company,  and also provide that the subsidiaries
of Principal  Mutual Life  Insurance  Company will furnish the same items and be
reimbursed by the Manager for their costs incurred in this regard.
    

     The  Funds  may  from  time  to time  execute  transactions  for  portfolio
securities with, and pay related brokerage  commissions to, Principal  Financial
Securities,  Inc., a  broker-dealer  that is an affiliate of the Distributor and
Manager for each of the Funds.

     The Manager serves as investment  advisor,  dividend  disbursing agent and,
directly  and  through an  affiliate,  as  transfer  agent for each of the Funds
sponsored by Principal Mutual Life Insurance Company.

MANAGERS' COMMENTS

     Princor  Management  Corporation  and Invista are staffed  with  investment
professionals who manage each individual fund.  Comments by these individuals in
the  following  paragraphs  summarize in capsule  form the general  strategy and
recent results of each fund over the past year. The accompanying  charts display
results  for the past 10 years or the life of the fund,  whichever  is  shorter.
Average Annual Total Return  figures  provided for each fund in the graphs below
reflect all expenses of the fund and assume all  distributions are reinvested at
net asset  value.  The figures do not  reflect  expenses  of the  variable  life
insurance  contracts or variable  annuity  contracts  that purchase fund shares;
performance  figures  for the  divisions  of the  contracts  would be lower than
performance figures for the funds due to the additional contract expenses.  Past
performance  is not  predictive  of future  performance.  Returns  and net asset
values fluctuate. Shares are redeemable at current net asset value, which may be
more or less than original cost.

     The various  indices  included in the graphs below are unmanaged and do not
reflect  any  commissions  or  fees  which  would  be  incurred  by an  investor
purchasing  the  securities  included  in the  index.  Investors  cannot  invest
directly into these or any indices.

Growth-Oriented Funds

Principal Balanced Fund
(Judith A. Vogel)

     This balanced  portfolio  combines  stocks,  bonds and cash in a relatively
conservative mix which seeks to provide both capital  appreciation and income to
the shareholder  without taking on undue risk. The asset  allocation of the Fund
generally  approximates 60% stocks and 40% bonds. In the year ended December 31,
1996 the stock market produced exceptional results.  Aided by a healthy economy,
continued corporate profit growth, and a good dose of investor  enthusiasm,  the
S&P 500 Stock Index advanced nearly 23%. Conditions in the bond market were less
supportive  over the year.  Long-term  interest rates rose 0.70% in 1996, with a
lot of volatility  along the way, causing the bond returns to hover between zero
and 3% for the year.  Demonstrating its balanced nature, the Fund produced a 13%
annual return,  about midway between stock and bond market results and very near
the Lipper  Balanced Fund Average.  The bond portion of the Fund's  portfolio is
comprised  of U.S.  Government  notes and bonds  with an  emphasis  on safety of
principal.  The stock portion of the portfolio is concentrated in companies with
stable or growing earnings that are not terribly sensitive to economic activity.
After  six years of  economic  expansion  resulting  in high  rates of  resource
utilization,  corporate profit growth is likely to come down, causing a scarcity
of  earnings  growth.  Companies  that can  continue  to grow  earnings  will be
afforded premium valuations.  There is no independent market index against which
to measure returns of balanced  portfolios,  however,  we show the S&P 500 Stock
Index for your information.

                         Total Returns *
                    As of December 31, 1996
         ---------------------------------------------------
                                             Since Inception
         1 Year           5 Year              Date 12/18/87                     
         13.13%           11.57%                12.16%                 
                        
                        
           Comparison of Change in Value of $10,000 Investment in the
            Balanced Fund, S&P 500 and Lipper Balanced Fund Average
           ----------------------------------------------------------     
                            Fund                             Lipper
            Year Ended      Total          S&P 500          Mid Cap
           December 31,    Return           Index            Index
                           10,000           10,000          10,000
              1988         11,637           11,661          11,229
              1989         12,982           15,356          13,429
              1990         12,147           14,877          13,355
              1991         16,321           19,412          16,930
              1992         18,410           20,891          18,122
              1993         20,447           22,992          20,066
              1994         20,019           23,294          19,561
              1995         24,941           32,037          24,482
              1996         28,215           39,388          27,851
                                    
Note: Past performance is not predictive of future performance.

Principal Capital Accumulation Fund
(David L. White)

     The  strategy  with this  portfolio  is to hold common  stocks of companies
based on a  valuation  that is  attractive  when  compared  to the  market.  The
analytical staff looks at companies' current valuations  compared to the market,
then at historical information to compare valuations to historical averages. The
focus is on the  fundamentals  of an industry and the company to  determine  the
current  and  future  outlook  as these  potential  investments.  From there the
portfolio is constructed to provide a diversified set of investments.

     The Fund  outperformed  the S&P 500 Index and Lipper Growth and Income Fund
Average for 1996.  The  strength of the market was in much fewer  stocks than in
the past.  The volatility  between  industries was much greater than the overall
results.  The Fund  benefited  from several areas of exposure.  Banks and health
care were the strongest  areas for the Fund during the year.  The focus has been
away from the more  cyclical  areas of the economy  which also helped during the
year.  As the economic  cycle  progresses,  the market  places more  emphasis on
companies  with  consistent  earnings  growth,  and we have tended to overweight
these  areas of the  market.  As the  market  performance  continues  to narrow,
however,  it  becomes  increasingly  difficult  to select the  correct  areas of
overperformance.

                   Total Returns *
               As of December 31, 1996
         ----------------------------------------
         1 Year          5 Year           10 Year
         23.50%          14.08%            13.08%

           Comparison of Change in Value of $10,000 Investment in the
  Capital Accumulation Fund, S&P 500 and Lipper Growth and Income Fund Average
  ----------------------------------------------------------------------------
                    Fund                 S&P 500                 Lipper
   Year Ended       Total                 Stock              Growth & Income
  December 31,      Return                Index                Fund Average
                    10,000               10,000                  10,000
     1987           10,647               10,526                  10,184
     1988           12,183               12,274                  11,814
     1989           14,155               16,163                  14,596
     1990           12,759               15,659                  13,946
     1991           17,693               20,433                  18,002
     1992           19,377               21,990                  19,618
     1993           20,888               24,201                  21,884
     1994           20,990               24,519                  21,678
     1995           27,688               33,722                  28,360
     1996           34,193               41,460                  34,253
                                                    
Note: Past performance is not predictive of future performance.

Principal Emerging Growth Fund
(Michael R. Hamilton)

     The equity market was strong in 1996,  but within the market there were two
different trends.  Large-cap stocks performed much better than small-cap stocks.
The  Emerging  Growth  Fund  returned  19.13%  compared  with the Lipper Mid Cap
Average of 17.9%.  The Fund and the  Lipper  Average  trailed  the S&P 500 Index
because of their  emphasis on small cap stocks.  While both trailed the S&P 500,
this was a good year for the fund.

     The  financial  market  continues  to  grapple  with the  paradox of strong
economic growth with no apparent inflation.  Productivity will be key in 1997 if
inflation is to remain benign.  The Fund's portfolio  continues to be focused on
companies that should enhance productivity of both labor and capital. Several of
the technology,  service and cyclical areas support this emphasis. The portfolio
is also overweighted in the financial sector as bank consolidation continues.

     Continued  profit growth will be important in 1997 as well.  Companies with
more predictable and visible earnings growth are preferred. This continues to be
those  that are low cost  producers  and have  competitive  barriers  to  entry.
Selectivity in all sectors will be crucial to outperformance.

              Total Returns *                      
          As of December 31, 1996                  
- ---------------------------------------------------
1 Year     5 Year     Since Inception Date 12/18/87
21.11%      16.64%                 17.73%          
                                        
                  Comparison of Change in Value of $10,000 Investment
                    in the Emerging Growth Fund, S&P 500 and
                          Lipper Mid Cap Fund Average
                -----------------------------------------------------      
                                     Fund                      Lipper          
                 Year Ended          Total       S&P 500       MID CAP 
                 December 31,       Return        Index        Index           
                                    10,000        10,000       10,000          
                    1988            12,369        11,661       11,476          
                    1989            15,070        15,356       14,586          
                    1990            13,186        14,877       14,067          
                    1991            20,240        19,412       21,275          
                    1992            23,264        20,891       23,213          
                    1993            27,750        22,992       26,625          
                    1994            27,967        23,294       26,079          
                    1995            36,080        32,037       34,469          
                    1996            43,697        39,388       40,646          

Note:  Past performance is not predictive of future performance.        

Important Notes of the Growth-Oriented Funds:

Standard & Poor's 500 Stock Index:  an unmanaged index of 500 widely held common
stocks representing industrial,  financial, utility and transportation companies
listed  on the  New  York  Stock  Exchange,  American  Stock  Exchange  and  the
Over-the-Counter market.

Lipper  Balanced  Fund  Average:  this  average  consists of mutual  funds which
attempt to conserve  principal by maintaining at all times a balanced  portfolio
of both stocks and bonds. Typically, the stock/bond ratio ranges around 60%/40%.
The one year average currently contains 272 mutual funds.

Lipper  Growth & Income  Fund  Average:  this  average  consists  of funds which
combine a growth of earnings  orientation  and an income  requirement  for level
and/or rising dividends. The one year average currently contains 522 funds.

Lipper Mid Cap Fund Average:  This average consists of funds which by prospectus
or portfolio practice,  limit their investments to companies with average market
capitalizations  and/or  revenues  between $800  million and the average  market
capitalization  of the Wilshire  4500 Index (as  captured by the Vanguard  Index
Extended Market Fund). The one-year average currently contains 154 funds.

Income-Oriented Funds

Principal Bond Fund
(Scott A. Bennett)

     The Principal Bond Fund's performance in 1996 lagged when compared to 1995.
1995 was a banner year, mainly because of dramatically declining interest rates.
During 1996 interest rates increased  throughout most of the year based on fears
of  increasing  inflation.  This hurt the  Fund's  relative  performance  as the
duration  target of 7 years  (actual  duration  at  12/31/96  was 6.98 years) is
longer than the average BBB rated bond fund and the BAA Lehman  Corporate Index.
Relative  performance was also negatively  impacted by the lack of a significant
amount of less than  investment  grade bonds in the portfolio.  High yield (less
than investment  grade) debt performed  extremely well during 1996, with many of
the top performing funds in the Lipper BAA universe having significant exposures
to this asset class.

     Over the long-term,  the Fund continues to outperform the average BBB fund.
This is attributed to remaining  fully invested and not trying to guess interest
rates. The BBB corporate bond class continued to be an attractive asset class in
1996,   outperforming  all  other  taxable  investment  grade  classes.  Spreads
continued  to narrow  during the year with  defaults  low and a large  amount of
funds chasing the available bonds.

                    Total Returns *                               
               As of December 31, 1996                            
- --------------------------------------------------------------
1 Year              5 Year     Since Inception Date 12/18/87      
  2.36%             8.20%                 9.55%                   

  Comparison of Change in Value of $10,000 Investment in the Bond Fund, Lehman
 Brothers BAA Corporate Index and Lipper Corporate Debt BBB Rated Fund Average
 -----------------------------------------------------------------------------
                       Fund              Lehman           Lipper
     Year Ended       Total                BAA              BBB
     December 31,    Return              Index              Avg
                      10,000            10,000            10,000
      1988            10,991            11,129            10,900
      1989            12,514            12,699            12,060
      1990            13,167            13,595            12,751
      1991            15,369            16,113            15,020
      1992            16,810            17,512            16,258
      1993            18,771            19,665            18,261
      1994            18,227            18,707            17,447
      1995            22,268            22,959            20,948
      1996            22,794            23,882            21,616
                                                   
Note:  Past performance is not predictive of future performance.    

Principal High Yield Fund
(James K. Hovey)

     While most bond investments had very low returns for 1996, high yield bonds
in general  and the  Principal  High Yield Fund  included  had a good year.  The
Fund's total return for 1996 was 13.13% which  compares to 11.35% for the Lehman
Brothers  High Yield  Index and 13.67% for the Lipper  High  Current  Yield Fund
Average. For comparison, 10 year U.S. Treasury bonds had a total return for 1996
of 0.04%.  This low return was caused by increasing  interest  rates causing the
value of Treasury bonds to fall.

     High yield bonds are somewhat insulated from interest rate movements due to
their  characteristic  of a large risk premium or spread that can offset general
interest  rate  movements  for assets with less credit risk.  In 1996,  the risk
premium  for high yield bonds  declined  enough to not only offset the risk free
interest  rate  increase,  but also to allow price  increases of many high yield
bonds.  While the annual total return performance was similar to both Lipper and
Lehman,  the  Fund  underperformed  both  during  the  first  two  quarters  and
outperformed during the third and fourth quarters of the year. Our Fund has a B+
average credit rating and has  approximately the same amount of BB exposure as B
exposure.  This more closely  resembles the Lehman index while high yield mutual
funds,  as  reflected by the Lipper  average,  typically  have a riskier  credit
profile than our Fund.  This risk profile was an advantage to the Lipper average
over the first two quarters as risk premium  tightening  was more  pronounced in
riskier bonds. Our Fund significantly  outperformed in the fourth quarter due to
excellent  performance by individual  securities that were upgraded or for which
tender offers had been received at attractive  levels.  Our Fund also  benefited
over the  course of the year by not  having  any  credit  defaults.  The  return
performance  of the Fund during 1996 is a good  indicator of how high yield is a
worthwhile  asset  class that can enhance  diversification.  The decline of risk
premiums will make  outperformance  of other types of income oriented funds more
difficult going forward, but also makes our conservative risk position even more
appropriate.

               Total Returns *                                 
          As of December 31, 1996                                 
- ---------------------------------------------------
1 Year     5 Year     Since Inception Date 12/18/87                          
 13.13%    11.20%                 9.89%                          
                                        
  Comparison of Change in Value of $10,000 Investment in the High Yield Fund,
  Lehman Brothers High Yield Index and Lipper High Current Yield Fund Average
                                            
                            Fund           Lehman       Lipper          
        Year Ended          Total        High Yield     Narrow          
        December 31,        Return         Index        Index           
                            10,000        10,000        10,000          
              1988          11,492        11,524        11,298          
              1989          11,735        11,620        11,239          
              1990          10,831        10,506        10,059          
              1991          13,788        15,346        13,876          
              1992          15,798        17,764        16,352          
              1993          17,743        20,803        19,500          
              1994          17,854        20,593        18,753          
              1995          20,725        24,549        21,844          
              1996          23,446        27,335        24,830          
                                          
Note:  Past performance is not predictive of future performance. 

Important Notes of the Income-Oriented Funds:

Lehman Brothers,  BAA Corporate Index: an unmanaged index of all publicly issued
fixed rate  nonconvertible,  dollar-denominated,  SEC-registered  corporate debt
rated Baa or BBB by Moody's or S&P.

Lipper  Corporate Debt BBB Rated Funds Average:  this average consists of mutual
funds  investing at least 65% of their assets in corporate and  government  debt
issues  rated by S&P or Moody's  in the top four  grades.  The one year  average
currently contains 102 mutual funds.

Lehman  Brothers  High Yield Index:  an unmanaged  index of all publicly  issued
fixed, dollar-denominated, SEC-registered corporate debt rated Ba1 or lower with
at least $100 million outstanding and one-year or more to maturity.

Lipper High Current  Yield Fund Average:  this average  consists of mutual funds
investing  in high  (relative)  current  yield fixed income  securities  with no
quality or maturity restrictions. The mutual funds tend to invest in lower grade
debt issues. The one year average currently contains 148 mutual funds.

Note: Mutual fund data from Lipper Analytical Services, Inc.

DETERMINATION OF NET ASSET VALUE OF FUND SHARES

     The net asset  value of each  Fund's  shares is  determined  daily,  Monday
through  Friday,  as of the close of  trading  on the New York  Stock  Exchange,
except on days on which changes in the value of the Fund's portfolio  securities
will not materially  affect the current net asset value of the Fund's redeemable
securities,  on days during  which a Fund  receives no order for the purchase or
sale  of its  redeemable  securities  and no  tender  of  such  a  security  for
redemption, and on customary national business holidays. The net asset value per
share of each Fund is determined by dividing the value of the Fund's  securities
plus all other  assets,  less all  liabilities,  by the  number  of Fund  shares
outstanding.

Growth-Oriented and Income-Oriented Funds

     The following  valuation  information  applies to the  Growth-Oriented  and
Income-Oriented  Funds.  Securities  for which  market  quotations  are  readily
available  are valued using those  quotations.  Other  securities  are valued by
using market quotations, prices provided by market makers or estimates of market
values  obtained from yield data and other factors  relating to  instruments  or
securities   with  similar   characteristics   in  accordance   with  procedures
established in good faith by the Board of Directors.  Securities  with remaining
maturities of 60 days or less are valued at amortized cost when it is determined
by the Board that amortized cost reflects fair value. Other assets are valued at
fair value as determined in good faith by the Board of Directors of the Fund.

     As previously described,  some of the Funds may purchase foreign securities
whose trading is substantially  completed each day at various times prior to the
close of the New York  Stock  Exchange.  The values of such  securities  used in
computing  net asset  value per share are usually  determined  as of such times.
Occasionally,  events  which  affect the values of such  securities  and foreign
currency  exchange rates may occur between the times at which they are generally
determined and the close of the New York Stock Exchange and would  therefore not
be  reflected  in the  computation  of the  Fund's  net asset  value.  If events
materially affecting the value of such securities occur during such period, then
these  securities will be valued at their fair value as determined in good faith
by the Manager under procedures  established and regularly reviewed by the Board
of  Directors.  To the extent the Fund invests in foreign  securities  listed on
foreign  exchanges  which trade on days on which the Fund does not determine its
net asset  value,  for  example  Saturdays  and other  customary  national  U.S.
Holidays,  the Fund's net asset  value could be  significantly  affected on days
when shareholders have no access to the Fund.

Money Market Fund

     The Money  Market Fund  values its  securities  at  amortized  cost.  For a
description of this calculation procedure see the Funds' Statement of Additional
Information.

PERFORMANCE CALCULATION

     From  time  to  time,  the  Funds  may  publish  advertisements  containing
information   (including  graphs,   charts,   tables  and  examples)  about  the
performance  of one or more of the  Funds.  The  Funds'  yield and total  return
figures  described  below  will  vary  depending  upon  market  conditions,  the
composition of the Funds' portfolios and operating  expenses.  These factors and
possible  differences in the methods used in calculating  yield and total return
should  be  considered  when  comparing  the  Funds'   performance   figures  to
performance figures published for other investment vehicles.  The Funds may also
quote  rankings,  yields or  returns as  published  by  independent  statistical
services or publishers,  and  information  regarding the  performance of certain
market  indices.  Any  performance  data  quoted for the Funds  represents  only
historical performance and is not intended to indicate future performance of the
Funds.  The  calculation  of average annual total return and yield for the Funds
does not include  fees and charges of the separate  accounts  that invest in the
Funds and,  therefore,  does not reflect  the  investment  performance  of those
separate accounts.  For further information on how the Funds calculate yield and
total return figures, see the Statement of Additional Information.

Average Annual Total Return

     Each Fund may advertise its respective average annual total return. Average
annual total return for each Fund is computed by calculating  the average annual
compounded  rate of return over the stated  period that would  equate an initial
$1,000  investment to the ending  redeemable  value assuming the reinvestment of
all  dividends  and capital  gains  distributions  at net asset value.  The same
assumptions  are made when  computing  cumulative  total  return by dividing the
ending  redeemable  value by the  initial  investment.  The Funds may also quote
rankings,  yields or returns as published by independent statistical services or
publishers, and information regarding the performance of certain market indices.

Yield and Effective Yield

     From time to time the Money Market Fund may advertise its respective  yield
and effective  yield. The yield of the Fund refers to the income generated by an
investment in the Fund over a seven-day period.  This income is then annualized.
That is, the amount of income  generated by the  investment  during that week is
assumed  to be  generated  each  week over a  52-week  period  and is shown as a
percentage of the investment.  The effective yield is calculated  similarly but,
when annualized, the income earned by an investment in the Fund is assumed to be
reinvested.  The effective  yield will be slightly higher than the yield because
of the compounding effect of this assumed reinvestment.

     The yield for the Money  Market  Fund will  fluctuate  daily as the  income
earned  on the  investments  of the Fund  fluctuates.  Accordingly,  there is no
assurance  that the yield quoted on any given occasion will remain in effect for
any period of time. The Fund is an open-end  investment  company and there is no
guarantee  that the net asset  value or any stated  rate of return  will  remain
constant.  A  shareholder's  investment  in the Fund is not  insured.  Investors
comparing  results of the Fund with  investment  results  and yields  from other
sources such as banks or savings and loan  associations  should understand these
distinctions.  Historical and comparative  yield  information  may, from time to
time, be presented by the Fund.

INCOME DIVIDENDS, DISTRIBUTIONS AND TAX STATUS

     It is  the  policy  of  each  Fund  to  distribute  substantially  all  net
investment  income and net realized gains.  Through such  distributions,  and by
satisfying certain other  requirements,  the Funds intend to qualify for the tax
treatment  accorded  to  regulated  investment  companies  under the  applicable
provisions of the Internal Revenue Code. This means that in each year in which a
Fund so qualifies it will be exempt from federal  income tax upon the amounts so
distributed to investors.

     Any dividends from the net investment income of the Funds (except the Money
Market Fund) will normally be payable to the shareholders  annually, and any net
realized  gains will be  distributed  annually.  All dividends and capital gains
distributions are applied to purchase  additional Fund shares at net asset value
as of the payment date without the imposition of any sales charge.

     Each Fund will  notify  shareholders  of the  portion of each  distribution
which  constitutes  investment income or capital gain. In view of the complexity
of tax considerations,  it is advisable for Eligible Purchasers  considering the
purchase of shares of the Funds to consult  with tax advisors on the federal and
state tax aspects of their investments and redemptions.

Money Market Fund

     The Money Market Fund  declares  dividends of all its daily net  investment
income on each day the Fund's net asset value per share is determined. Dividends
are payable daily and are automatically reinvested in full and fractional shares
of the Fund at the then  current net asset value unless a  shareholder  requests
payment in cash.

     Net  investment  income,  for  dividend  purposes,  consists of (1) accrued
interest  income plus or minus accrued  discount or amortized  premium;  plus or
minus (2) all net short-term  realized  gains and losses;  minus (3) all accrued
expenses of the Fund. Expenses of the Fund are accrued each day. Net income will
be  calculated  immediately  prior to the  determination  of net asset value per
share of the Fund.

     Since the Fund's policy is, under normal  circumstances,  to hold portfolio
securities to maturity and to value  portfolio  securities at amortized cost, it
does not expect any capital gains or losses.  If the Fund does experience gains,
however,  it could  result in an increase in  dividends.  Capital  losses  could
result in a decrease in  dividends.  If for some  extraordinary  reason the Fund
realizes net long-term  capital  gains,  it will  distribute  them once every 12
months.

     Since the net income of the Fund  (including  realized  gains and losses on
the portfolio  securities) is declared as a dividend each time the net income of
the Fund is  determined,  the net asset  value  per  share of the Fund  normally
remains at $1.00 immediately after each determination and dividend  declaration.
Any  increase  in  the  value  of  a  shareholder's   investment  in  the  Fund,
representing reinvestment of dividend income, is reflected by an increase in the
number of shares of the Fund in the account.

     Normally  the Fund  will  have a  positive  net  income at the time of each
determination  thereof.  Net income may be negative if an  unexpected  liability
must be accrued or a loss is realized.  If the net income of the Fund determined
at any time is a negative amount,  the net asset value per share will be reduced
below  $1.00.  If this  happens,  the Fund may endeavor to restore the net asset
value  per  share to $1.00 by  reducing  the  number  of  outstanding  shares by
redeeming  proportionately from shareholders without the payment of any monetary
consideration,  such number of full and  fractional  shares as is  necessary  to
maintain a net asset value per share of $1.00.  Each  shareholder will be deemed
to have agreed to such a redemption in these  circumstances  by investing in the
Fund. The Fund may seek to achieve the same objective of restoring the net asset
value  per  share  to $1.00  by not  declaring  dividends  from  net  income  on
subsequent days until restoration,  with the result that the net asset value per
share would  increase to the extent of positive net income which is not declared
as a dividend, or any other method approved by the Board of Directors.

     The Board of Directors may revise the above  dividend  policy,  or postpone
the  payment of  dividends,  if the Fund  should  have or  anticipate  any large
presently  unexpected  expense,  loss or  fluctuation in net assets which in the
opinion of the Board might have a significant adverse affect on shareholders.

ELIGIBLE PURCHASERS AND PURCHASE OF SHARES

     Only  Eligible  Purchasers  may  purchase  shares  of the  Funds.  Eligible
Purchasers  are  limited to (a)  separate  accounts  of  Principal  Mutual  Life
Insurance  Company or of other insurance  companies;  (b) Principal  Mutual Life
Insurance Company or any subsidiary or affiliate thereof;  (c) trustees or other
managers of any qualified profit sharing, incentive or bonus plan established by
Principal Mutual Life Insurance  Company or any subsidiary or affiliate  thereof
for the  employees of such company,  subsidiary  or affiliate.  Such trustees or
managers  may  purchase  Fund  shares  only in their  capacities  as trustees or
managers  and not for their  personal  accounts.  The Board of Directors of each
Fund  reserves  the  right to  broaden  or limit  the  designation  of  Eligible
Purchasers.

     Principal Balanced,  Principal Bond,  Principal Capital  Accumulation Fund,
Principal  Emerging  Growth and  Principal  Money  Market  Fund each serve as an
underlying  investment  medium for variable annuity  contracts and variable life
insurance policies that are funded in separate accounts established by Principal
Mutual Life Insurance  Company.  It is conceivable  that in the future it may be
disadvantageous  for  variable  life  insurance  separate  accounts and variable
annuity  separate  accounts  to  invest in the  Funds  simultaneously.  Although
neither  Principal Mutual Life Insurance Company nor the Funds currently foresee
any such  disadvantages  either to variable life  insurance  policy owners or to
variable  annuity  contract  owners,  each Fund's Board of Directors  intends to
monitor events in order to identify any material  conflicts  between such policy
owners and contract owners and to determine what action, if any, should be taken
in response thereto. Such action could include the sale of Fund shares by one or
more of the separate accounts,  which could have adverse consequences.  Material
conflicts  could result from, for example,  (1) changes in state insurance laws,
(2) changes in Federal income tax law, (3) changes in the investment  management
of the Fund, or (4)  differences in voting  instructions  between those given by
policy owners and those given by contract owners.

     Shares are  purchased  from Princor  Financial  Services  Corporation,  the
principal  underwriter  for the Funds.  There are no sales charges on the Funds'
shares.  There are no  restrictions  on  amounts  to be  invested  in the Funds'
shares.

     Shareholder accounts for each Fund will be maintained under an open account
system. Under this system, an account is automatically opened and maintained for
each new  investor.  Each  investment  is  confirmed  by sending the  investor a
statement of account showing the current purchase and the total number of shares
then  owned.  The  statement  of account is treated by each Fund as  evidence of
ownership  of Fund  shares in lieu of stock  certificates,  and  unless  written
request is made to the Fund, stock  certificates will not be issued or delivered
to investors.  Certificates, which can be stolen or lost, are unnecessary except
for special purposes such as collateral for a loan.  Fractional interests in the
Funds' shares are reflected to three decimal places in the statement of account,
but any stock certificates will be issued only for full shares owned.

     If an offer to purchase  shares is received by any of the Funds  before the
close of trading on the New York Stock  Exchange,  the shares  will be issued at
the offering price (net asset value of Fund shares)  computed on that day. If an
offer is received  after the close of trading or on a day which is not a trading
day,  the shares  will be issued at the  offering  price  computed  on the first
succeeding  day on which a price is  determined.  Dividends  on the Money Market
Fund  shares  will be paid on the next day  following  the  effective  date of a
purchase order.

SHAREHOLDER RIGHTS

     The following  information  is  applicable to each of the Principal  Funds.
Each  Fund  share is  entitled  to one vote  either in person or by proxy at all
shareholder  meetings  for that  Fund.  This  includes  the right to vote on the
election of directors,  selection of independent  accountants  and other matters
submitted  to meetings of  shareholders.  Each share has equal rights with every
other share as to dividends, earnings, voting, assets and redemption. Shares are
fully paid and  non-assessable,  and have no preemptive  or  conversion  rights.
Shares may be issued as full or fractional shares, and each fractional share has
proportionately  the same rights,  including  voting, as are provided for a full
share.  Shareholders  of each of these  Funds may  remove any  director  with or
without  cause by the vote of a majority  of the votes  entitled to be cast at a
meeting of shareholders.

     The bylaws of each Fund provide that the Board of Directors of the Fund may
increase or decrease the aggregate number of shares which the Fund has authority
to issue without a shareholder vote.

     The bylaws of each Fund also  provide that the Fund need not hold an annual
meeting of  shareholders  in any year in which none of the following is required
to be  acted  on by  shareholders  under  the  Investment  Company  Act of 1940:
election of directors;  approval of investment advisory agreement;  ratification
of selection of independent  public  accountants;  and approval of  distribution
agreement.  The Funds intend to hold shareholder  meetings only when required by
law and at such other  times as may be deemed  appropriate  by their  respective
Boards of Directors.

     Shareholder  inquiries  should be  directed to the  applicable  Fund at The
Principal Financial Group, Des Moines, Iowa 50392.

     NON-CUMULATIVE  VOTING: The Funds' shares have non-cumulative voting rights
which  means  that the  holders  of more than 50% of the  shares  voting for the
election of directors  of a Fund can elect 100% of the  directors if they choose
to do so, and in such event,  the holders of the remaining shares voting for the
election of directors will not be able to elect any directors.

     Principal Mutual Life Insurance  Company votes each Fund's shares allocated
to each of its separate accounts  registered under the Investment Company Act of
1940 and attributable to variable  annuity  contracts or variable life insurance
policies  participating  therein in accordance with  instructions  received from
contract or policy holders,  participants  and annuitants.  Other shares of each
Fund held by each  registered  separate  account,  including  those for which no
timely  instructions  are received,  are voted in proportion to the instructions
that are received  with respect to contracts or policies  participating  in that
separate  account.  Shares of each of the Funds held in the  general  account of
Principal Mutual Life Insurance Company or in its unregistered separate accounts
are voted in  proportion to the  instructions  that are received with respect to
contracts and policies participating in its registered and unregistered separate
accounts.  If Principal  Mutual  determines  pursuant to  applicable  law that a
Fund's  shares held in one or more separate  accounts or in its general  account
need  not  be  voted   pursuant  to   instructions   received  with  respect  to
participating  contracts or policies,  it then may vote those Fund shares in its
own right.

REDEMPTION OF SHARES

     Except for the third paragraph below,  most of the following  discussion of
redemption  procedures  is  relevant  only to  Eligible  Purchasers  other  than
variable  annuity and variable life separate  accounts of Principal  Mutual Life
Insurance Company, and its wholly-owned subsidiaries.

     Each Fund will  redeem  its  shares  upon  request.  There is no charge for
redemption.  If no certificates have been issued, a shareholder  simply writes a
letter to the appropriate  Fund requesting  redemption of any part or all of the
shares.  The letter  must be signed  exactly as the  account is  registered.  If
certificates have been issued, they must be properly endorsed and forwarded with
the request.  If payment is to be made to the  registered  shareholder  or joint
shareholders,  the Fund will not  require a signature  guarantee  as a part of a
proper endorsement;  otherwise the shareholder's signature must be guaranteed by
either  a  commercial  bank,  trust  company,  credit  union,  savings  and loan
association,  national  securities  exchange member, or by a brokerage firm. The
price at which the shares are redeemed  will be the net asset value per share as
next  computed  after the  request  (with  appropriate  certificate,  if any) is
received by the Fund in proper and complete form. The amount received for shares
upon redemption may be more or less than the cost of such shares  depending upon
the net asset value at the time of redemption.

     Redemption  proceeds will be sent within three  business days after receipt
of request for  redemption  in proper form.  However,  each Fund may suspend the
right of  redemption  during any period  when (a)  trading on the New York Stock
Exchange is restricted as determined by the Securities  and Exchange  Commission
or such  Exchange  is closed  for  other  than  weekends  and  holidays;  (b) an
emergency exists, as determined by the Securities and Exchange Commission,  as a
result  of  which  (i)  disposal  by the Fund of  securities  owned by it is not
reasonably  practicable,  or (ii) it is not reasonably  practicable for the Fund
fairly to determine the value of its net assets;  or (c) the Commission by order
so permits  for the  protection  of  security  holders of the Fund.  A Fund will
redeem  only  those  shares  for  which  it  has  good  payment.  To  avoid  the
inconvenience  of such a delay,  shares may be purchased with a certified check,
bank  cashier's  check or money  order.  During the  period  prior to the time a
redemption  from the Money  Market Fund is  effective,  dividends on such shares
will accrue and be payable and the shareholder  will be entitled to exercise all
other rights of beneficial ownership.

     Restricted  Transfer:  Shares of each of the Funds may be transferred to an
Eligible Purchaser.  However, whenever any of the Funds is requested to transfer
shares  to other  than an  Eligible  Purchaser,  the  Fund has the  right at its
election  to  purchase  such  shares  at their net asset  value  next  effective
following  the time at which the request for  transfer is  presented;  provided,
however,  that the Fund must notify the transferee or transferees of such shares
in writing  of its  election  to  purchase  such  shares  within  seven (7) days
following the date of such request and  settlement for such shares shall be made
within such seven-day period.

ADDITIONAL INFORMATION

     Custodian:  Bank of New York, 48 Wall Street,  New York, New York 10286, is
custodian of the portfolio  securities and cash assets of each of the Funds. The
custodian performs no managerial or policymaking functions for the Funds.

     Organization and Share Ownership:  The Funds were incorporated in the state
of Maryland on the following dates: Balanced Fund - November 26, 1986; Bond Fund
- -  November  26,  1986;  Capital  Accumulation  Fund - May 26,  1989  (effective
November 1, 1989  succeeded to the business of a predecessor  Fund that had been
incorporated  in Delaware on February 6, 1969);  Emerging Growth Fund - February
20, 1987;  High Yield Fund - December 2, 1986;  and Money Market Fund - June 10,
1982.  Principal  Mutual  Life  Insurance  Company  owns  100%  of  each  Fund's
outstanding shares.

     Capitalization:  The  authorized  capital  stock of each Fund  consists  of
100,000,000 shares of common stock (500,000,000 for Principal Money Market Fund,
Inc.), $.01 par value.

     Financial Statements:  Copies of the financial statements of each Fund will
be mailed to each shareholder of that Fund  semi-annually.  At the close of each
fiscal  year,  each  Fund's  financial  statements  will be audited by a firm of
independent auditors.  The firm of Ernst & Young LLP has been appointed to audit
the financial statements of each Fund for their respective present fiscal years.

     Registration Statement: This Prospectus omits some information contained in
the  Statement  of  Additional   Information  (also  known  as  Part  B  of  the
Registration  Statement)  and Part C of the  Registration  Statements  which the
Funds  have  filed  with the  Securities  and  Exchange  Commission.  The Funds'
Statement of Additional  Information  is hereby  incorporated  by reference into
this Prospectus. A copy of the Funds' Statement of Additional Information can be
obtained upon request,  free of charge,  by writing or telephoning the Fund. You
may  obtain  a copy of Part C of the  Registration  Statements  filed  with  the
Securities and Exchange Commission,  Washington,  D.C., from the Commission upon
payment of the prescribed fees.

     Principal   Underwriter:   Princor  Financial  Services  Corporation,   The
Principal  Financial  Group,  Des  Moines,  Iowa  50392-0200,  is the  principal
underwriter for each of the Principal Funds.




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