PRUDENTIAL MUNICIPAL BOND FUND
497, 1997-07-07
Previous: PRINCIPAL GOVERNMENT SECURITIES FUND INC, PRES14A, 1997-07-07
Next: BAKER HUGHES INC, S-8 POS, 1997-07-07



<PAGE>
PRUDENTIAL MUNICIPAL BOND FUND
 
- --------------------------------------------------------------------------------
 
PROSPECTUS DATED JULY 2, 1997
 
- --------------------------------------------------------------------------------
 
Prudential Municipal Bond Fund (the Fund) is an open-end, diversified,
management investment company, or mutual fund, consisting of three separate
portfolios--the High Yield Series, the Insured Series and the Intermediate
Series (collectively, the Series). The investment objectives of the Series are
as follows: (i) the objective of the High Yield Series is to provide the maximum
amount of income that is eligible for exclusion from federal income taxes, (ii)
the objective of the Insured Series is to provide the maximum amount of income
that is eligible for exclusion from federal income taxes consistent with the
preservation of capital and (iii) the objective of the Intermediate Series is to
provide a high level of income that is eligible for exclusion from federal
income taxes consistent with the preservation of capital. Although each Series
will seek income that is eligible for exclusion from federal income taxes, a
portion of the dividends and distributions paid by each Series (and, in
particular, the High Yield Series) may be treated as a preference item for
purposes of the alternative minimum tax. Each Series seeks to achieve its
objective through the separate investment policies described in this Prospectus.
There can be no assurance that the Series' investment objectives will be
achieved. See "How the Fund Invests--Investment Objectives and Policies."
 
Subject to the limitations described herein, each Series may utilize
derivatives, including buying and selling futures contracts for the purpose of
hedging its portfolio securities. See "How the Fund Invests--Investment
Objectives and Policies."
 
Although the High Yield Series may invest up to 100% of its assets in lower
rated bonds, commonly known as "junk bonds," such securities typically comprise
less than half of the Series' investment portfolio. Investments of this type are
subject to a greater risk of loss of principal and interest, including default
risk, than higher rated bonds. Purchasers should carefully assess the risks
associated with an investment in this Series. See "How the Fund
Invests--Investment Objectives and Policies--Risk Factors Relating to Investing
in High Yield Securities."
 
The Insured Series invests at least 70% of its assets in insured obligations.
The insurance relates to the timely payment of principal and interest on
portfolio investments and not to the shares of the Series.
 
The Fund's address is Gateway Center Three, 100 Mulberry Street, Newark, New
Jersey 07102-4077, and its telephone number is (800) 225-1852.
 
This Prospectus sets forth concisely the information about the Fund that a
prospective investor should know before investing. Additional information about
the Fund has been filed with the Securities and Exchange Commission (SEC) in a
Statement of Additional Information, dated July 2, 1997, which information is
incorporated herein by reference (is legally considered a part of this
Prospectus) and is available without charge upon request to the Fund at the
address or telephone number noted above.
- --------------------------------------------------------------------------------
 
INVESTORS ARE ADVISED TO READ THIS PROSPECTUS AND RETAIN IT FOR FUTURE
REFERENCE.
- --------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
<PAGE>
                                FUND HIGHLIGHTS
 
  The following summary is intended to highlight certain information contained
in this Prospectus and is qualified in its entirety by the more detailed
information appearing elsewhere herein.
 
WHAT IS PRUDENTIAL MUNICIPAL BOND FUND?
 
  Prudential Municipal Bond Fund is a mutual fund. A mutual fund pools the
resources of investors by selling its shares to the public and investing the
proceeds of such sale in a portfolio of securities designed to achieve its
investment objective. Technically, the Fund is an open-end, diversified,
management investment company. The Fund is comprised of three separate
portfolios--the High Yield Series, the Insured Series and the Intermediate
Series.
 
WHAT ARE THE SERIES' INVESTMENT OBJECTIVES?
 
  The investment objective of the High Yield Series is to provide the maximum
amount of income that is eligible for exclusion from federal income taxes. The
investment objective of the Insured Series is to provide the maximum amount of
income that is eligible for exclusion from federal income taxes consistent with
the preservation of capital. The investment objective of the Intermediate Series
is to provide a high level of income that is eligible for exclusion from federal
income taxes consistent with the preservation of capital. Each Series seeks to
achieve its objective through the separate investment policies described in this
Prospectus. There can be no assurance that the Series' objectives will be
achieved. See "How the Fund Invests--Investment Objectives and Policies" at page
18.
 
WHAT ARE THE SERIES' RISK FACTORS AND SPECIAL CHARACTERISTICS?
 
  The High Yield Series invests in high yield securities, commonly known as
"junk bonds," which may be considered speculative and are subject to the risk of
an issuer's inability to meet principal and interest payments on the obligations
as well as price volatility. The Insured Series invests primarily in insured
municipal obligations. Although the insurance policies protect against the
timely payment of principal and interest on the insured municipal obligations,
the price of the municipal obligations and the stability of the Series' net
asset value are not insured. The Intermediate Series invests primarily in
municipal obligations with maturities between 3 and 15 years and will have a
dollar-weighted average portfolio maturity of more than 3 and less than 10
years. Generally, the yield earned on longer-term municipal obligations is
greater than that earned on similar obligations with shorter maturities.
However, obligations with longer maturities are subject to greater market risk
due to larger fluctuations in value given specific changes in the level of
interest rates relative to the value of shorter-term obligations. See "How the
Fund Invests-- Investment Objectives and Policies" at page 18. Each Series may
purchase and sell derivatives, including certain financial futures contracts and
options thereon, for hedging purposes. These activities may be considered
speculative and may result in higher risks and costs to the Fund. See "How the
Fund Invests--Hedging Strategies--Risks of Hedging Strategies" at page 25. As
with an investment in any mutual fund, an investment in this Fund can decrease
in value and you can lose money.
 
WHO MANAGES THE FUND?
 
  Prudential Investments Fund Management LLC (PIFM or the Manager) is the
Manager of the Fund and is compensated for its services at an annual rate of .50
of 1% of the average daily net assets of each Series up to $1 billion and .45 of
1% of the average daily net assets of each Series in excess of $1 billion. As of
May 31, 1997, PIFM served as manager or administrator to 62 investment
companies, including 40 mutual funds, with aggregate assets of approximately $56
billion. The Prudential Investment Corporation which does business under the
name Prudential Investments (PI, the Subadviser, or the investment adviser)
furnishes investment advisory services in connection with the management of the
Fund under a Subadvisory Agreement with PIFM. See "How the Fund is
Managed--Manager" at page 29.
 
WHO DISTRIBUTES THE FUND'S SHARES?
 
  Prudential Securities Incorporated (Prudential Securities or PSI), a major
securities underwriter and securities and commodities broker, acts as the
Distributor of the Fund's Class A, Class B, Class C and Class Z shares. PSI is
paid an annual distribution and service fee which is currently being charged at
the rate of .10 of 1% of the average daily net assets of the Class A shares of
each Series, is paid an annual distribution and service fee which is currently
being charged at the rate of .50 of 1% of the average daily net assets of the
Class B shares of each Series and is paid an annual distribution and service fee
which is currently being charged at the rate of .75 of 1% of the average daily
net assets of the Class C shares of each Series. Prudential Securities incurs
the expense of distributing the Fund's Class Z shares under a distribution
agreement with the Fund, none of which is reimbursed or paid for by the Fund.
See "How the Fund is Managed--Distributor" at page 29.
 
                                       2
<PAGE>
WHAT IS THE MINIMUM INVESTMENT?
 
  The minimum initial investment for Class A and Class B shares is $1,000 per
class and $5,000 for Class C shares. The minimum subsequent investment is $100
for Class A, Class B and Class C shares. Class Z shares are not subject to any
minimum investment requirements. There is no minimum investment requirement for
certain employee savings plans. For purchases made through the Automatic Savings
Accumulation Plan, the minimum initial and subsequent investment is $50. See
"Shareholder Guide--How to Buy Shares of the Fund" at page 37 and "Shareholder
Guide--Shareholder Services" at page 46.
 
HOW DO I PURCHASE SHARES?
 
  You may purchase shares of the Fund through Prudential Securities, Pruco
Securities Corporation (Prusec) or directly from the Fund through its transfer
agent, Prudential Mutual Fund Services LLC (PMFS or the Transfer Agent), at the
net asset value per share (NAV) next determined after receipt of your purchase
order by the Transfer Agent or Prudential Securities plus a sales charge which
may be imposed either (i) at the time of purchase (Class A shares) or (ii) on a
deferred basis (Class B or Class C shares). Class Z shares are offered to a
limited group of investors at net asset value without any sales charge. See "How
the Fund Values its Shares" at page 32 and "Shareholder Guide--How to Buy Shares
of the Fund" at page 37.
 
WHAT ARE MY PURCHASE ALTERNATIVES?
 
  The Fund offers four classes of shares through this Prospectus:
 
<TABLE>
<S>                 <C>
- - Class A Shares:   Sold with an initial sales charge of up to 3% of the
                    offering price.
- - Class B Shares:   Sold without an initial sales charge but are subject to a
                    contingent deferred sales charge or CDSC (declining from 5%
                    to zero of the lower of the amount invested or the
                    redemption proceeds) which will be imposed on certain
                    redemptions made within six years of purchase. Although
                    Class B shares are subject to higher ongoing
                    distribution-related expenses than Class A shares, Class B
                    shares will automatically convert to Class A shares (which
                    are subject to lower ongoing distribution-related expenses)
                    approximately seven years after purchase.
- - Class C Shares:   Sold without an initial sales charge and, for one year after
                    purchase, are subject to a 1% CDSC on redemptions. Like
                    Class B shares, Class C shares are subject to higher ongoing
                    distribution-related expenses than Class A shares but do not
                    convert to another class.
- - Class Z Shares:   Sold without either an initial or contingent deferred sales
                    charge to a limited group of investors. Class Z shares are
                    not subject to any ongoing service or distribution expenses.
</TABLE>
 
  See "Shareholder Guide--Alternative Purchase Plan" at page 38.
 
HOW DO I SELL MY SHARES?
 
  You may redeem your shares at any time at the NAV next determined after
Prudential Securities or the Transfer Agent receives your sell order. However,
the proceeds of redemptions of Class B and Class C shares may be subject to a
CDSC. See "Shareholder Guide--How to Sell Your Shares" at page 41.
 
HOW ARE DIVIDENDS AND DISTRIBUTIONS PAID?
 
  The Fund expects to declare daily and pay monthly dividends of net investment
income, if any, and make distributions of any net capital gains at least
annually. Dividends and distributions will be automatically reinvested in
additional shares of a Series at NAV without a sales charge unless you request
that they be paid to you in cash. See "Taxes, Dividends and Distributions" at
page 33.
 
                                       3
<PAGE>
                                 FUND EXPENSES
                               (FOR EACH SERIES)
<TABLE>
<CAPTION>
SHAREHOLDER TRANSACTION
  EXPENSES (a)             CLASS A SHARES        CLASS B SHARES (b)            CLASS C SHARES            CLASS Z SHARES (e)
                           --------------     ------------------------     -----------------------     -----------------------
<S>                        <C>                <C>                          <C>                         <C>
    Maximum Sales Load
     Imposed on Purchases
     (as a percentage of
     offering price).....        3%                     None                        None                        None
    Maximum Sales Load
     Imposed on
     Reinvested
     Dividends...........       None                    None                        None                        None
    Maximum Deferred
     Sales Load (as a
     percentage of
     original purchase
     price or redemption
     proceeds, whichever
     is lower)...........       None          5% during the first             1% on redemptions                 None
                                              year, decreasing by 1%        made within one year
                                              annually to 1% in the              of purchase
                                              fifth and sixth years
                                              and 0% the seventh year
    Redemption Fees......       None                    None                        None                        None
    Exchange Fee.........       None                    None                        None                        None
 
<CAPTION>
ANNUAL FUND OPERATING
EXPENSES (c)
(as a percentage of
average net assets)        CLASS A SHARES          CLASS B SHARES              CLASS C SHARES            CLASS Z SHARES (e)
                           --------------     ------------------------     -----------------------     -----------------------
<S>                        <C>                <C>                          <C>                         <C>
    Management Fees
     (Before Waiver):
      High Yield
       Series............        .50%                    .50%                        .50%                        .50%
      Insured Series.....        .50                     .50                         .50                         .50%
      Intermediate
       Series............        .50                     .50                         .50                         .50%
    12b-1 Fees (After
     Reduction):
      High Yield
       Series............        .10%(d)                 .50%                        .75%(d)                    None
      Insured Series.....        .10(d)                  .50                         .75(d)                     None
      Intermediate
       Series............        .10(d)                  .50                         .75(d)                     None
    Other Expenses:
      High Yield
       Series............        .09%                    .09%                        .09%                        .09%
      Insured Series.....        .13                     .13                         .13                         .13
      Intermediate
       Series............        .60                     .60                         .60                         .60
    Total Fund Operating
     Expenses (Before
     Waiver and After
     Reduction):
      High Yield
       Series............        .69%                   1.09%                       1.34%                        .59%
      Insured Series.....        .73                    1.13                        1.38                         .63
      Intermediate
       Series............       1.20                    1.60                        1.85                        1.10
<FN>
- ------------------
 (a) Pursuant to rules of the National Association of Securities Dealers, Inc.,
     the aggregate initial sales charges, deferred sales charges and asset-based
     sales charges on shares of each Series may not exceed 6.25% of total gross
     sales, subject to certain exclusions. This 6.25% limitation is imposed on
     each class of the Series rather than on a per shareholder basis. Therefore,
     long-term shareholders of the Fund may pay more in total sales charges than
     the economic equivalent of 6.25% of such shareholders' investment in such
     shares. See "How the Fund is Managed--Distributor."
 (b) Class B shares will automatically convert to Class A shares approximately
     seven years after purchase. See "Shareholder Guide--Conversion Feature--
     Class B Shares."
 (c) Based on expenses incurred during the fiscal year ended April 30, 1997,
     without taking into account the management fee waiver. At the current level
     of management fee waiver (10%), Management Fees would be .45% for all
     classes for each Series and Total Fund Operating Expenses for Class A, B, C
     and Class Z shares would be .64%, 1.04%, 1.29% and .54%, respectively, for
     the High Yield Series, .68%, 1.08%, 1.33% and .58%, respectively, for the
     Insured Series and 1.15%, 1.55%, 1.80% and 1.05%, respectively, for the
     Intermediate Series.
 (d) Although the Class A and Class C Distribution and Service Plans provide
     that the Fund may pay a distribution fee of up to .30 of 1% and 1% of the
     average daily net assets of the Class A and Class C shares, respectively,
     the Distributor has agreed to limit its distribution fees with respect to
     the Class A and Class C shares of each Series to no more than .10 of 1% and
     .75 of 1% of the average daily net assets of the Class A and Class C
     shares, respectively, for the fiscal year ending April 30, 1998. Total Fund
     Operating Expenses of the Class A and Class C shares without such
     limitation would be .89% and 1.59%, respectively, of the High Yield Series,
     .93% and 1.63%, respectively, of the Insured Series and 1.40% and 2.10%,
     respectively, of the Intermediate Series. See "How the Fund is
     Managed--Distributor."
 (e) Estimated based on expenses expected to have been incurred if Class Z
     shares had been in existence throughout the fiscal year ended April 30,
     1997.
</TABLE>
 
                                       4
<PAGE>
 
<TABLE>
<CAPTION>
EXAMPLE (EACH SERIES)                                           1 YEAR        3 YEARS       5 YEARS       10 YEARS
                                                               ---------     ---------     ---------     ----------
<S>                                                            <C>           <C>           <C>           <C>
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:
    High Yield Series
      Class A................................................     $37           $51           $67           $113
      Class B................................................     $61           $65           $70           $116
      Class C................................................     $24           $42           $73           $161
      Class Z (a)............................................     $ 6           $19           $33           $ 74
    Insured Series
      Class A................................................     $37           $53           $69           $118
      Class B................................................     $62           $66           $72           $121
      Class C................................................     $24           $44           $76           $166
      Class Z (a)............................................     $ 6           $20           $35           $ 79
    Intermediate Series
      Class A................................................     $42           $67           $94           $171
      Class B................................................     $66           $80           $97           $174
      Class C................................................     $29           $58           $100          $217
      Class Z (a)............................................     $11           $35           $61           $134
You would pay the following expenses on the same investment,
  assuming no redemption:
    High Yield Series
      Class A................................................     $37           $51           $67           $113
      Class B................................................     $11           $35           $60           $116
      Class C................................................     $14           $42           $73           $161
      Class Z (a)............................................     $ 6           $19           $33           $ 74
    Insured Series
      Class A................................................     $37           $53           $69           $118
      Class B................................................     $12           $36           $62           $121
      Class C................................................     $14           $44           $76           $166
      Class Z (a)............................................     $ 6           $20           $35           $ 79
    Intermediate Series
      Class A................................................     $42           $67           $94           $171
      Class B................................................     $16           $50           $87           $174
      Class C................................................     $19           $58           $100          $217
      Class Z (a)............................................     $11           $35           $61           $134
(a)  Estimated based on expenses expected to have been incurred if Class Z shares had been in existence throughout
     the fiscal year ended April 30, 1997.
The above examples are based on data for the Fund's fiscal year ended April 30, 1997. THE EXAMPLES SHOULD NOT BE
CONSIDERED A REPRESENTATION OF PAST OR FUTURE EXPENSES. ACTUAL EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.
The purpose of this table is to assist investors in understanding the various costs and expenses that an investor
in the Fund will bear, whether directly or indirectly. For more complete descriptions of the various costs and
expenses, see "How the Fund is Managed." "Other Expenses" includes operating expenses of the Series, such as
Trustees' and professional fees, registration fees, reports to shareholders and transfer agency and custodian fees.
</TABLE>
 
                                       5
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                      (HIGH YIELD SERIES - CLASS A SHARES)
 
  The following financial highlights, for the fiscal year ended April 30, 1997,
have been audited by Price Waterhouse LLP, independent accountants, and by
Deloitte & Touche LLP, independent auditors, for the four years ended April 30,
1996. Each of the respective reports by Price Waterhouse LLP and Deloitte &
Touche LLP on such financial highlights were unqualified. This information
should be read in conjunction with the financial statements and notes thereto,
which appear in the Statement of Additional Information. The financial
highlights contain selected data for a Class A share of beneficial interest
outstanding, total return, ratios to average net assets and other supplemental
data for the periods indicated. The information is based on data contained in
the financial statements. Further performance information is contained in the
annual report, which may be obtained without charge. See "Shareholder
Guide--Shareholder Services--Reports to Shareholders."
 
<TABLE>
<CAPTION>
                                                               HIGH YIELD SERIES
                      ---------------------------------------------------------------------------------------------------
                                                                    CLASS A
                      ---------------------------------------------------------------------------------------------------
                                                                                                                 JANUARY
                                                                                                                   22,
                                                                                                                 1990(a)
                                                      YEARS ENDED APRIL 30,                                      THROUGH
                      --------------------------------------------------------------------------------------    APRIL 30,
                        1997         1996         1995         1994         1993        1992         1991         1990
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
PER SHARE OPERATING
 PERFORMANCE:
<S>                   <C>          <C>          <C>          <C>          <C>         <C>          <C>          <C>
Net asset value,
 beginning of
 period.............    $10.70       $10.72       $10.74       $11.14       $10.68      $10.45       $10.33     $  10.58
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............       .70(d)       .72(d)       .72(d)       .72          .77         .77(d)       .79(d)       .23(d)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......       .14         (.02)        (.02)        (.39)         .46         .23          .12         (.25)
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
  Total from
   investment
   operations.......       .84          .70          .70          .33         1.23        1.00          .91         (.02)
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............      (.70)        (.72)        (.72)        (.72)        (.77)       (.77)        (.79)        (.23)
Distributions from
 capital gains......        --           --           --         (.01)          --          --           --           --
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
  Total
   distributions....      (.70)        (.72)        (.72)        (.73)        (.77)       (.77)        (.79)        (.23)
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
Net asset value, end
 of period..........    $10.84       $10.70       $10.72       $10.74       $11.14      $10.68       $10.45       $10.33
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
                      ---------    ---------    ---------    ---------    ---------   ---------    ---------    ---------
TOTAL RETURN (b):...      8.03%        6.55%        6.90%        2.88%       11.90%       9.82%        9.14%       (1.49)%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of
 period (000).......  $334,062     $223,073     $115,501      $54,491      $43,529     $24,725      $15,089       $3,905
Average net assets
 (000)..............  $294,940     $162,329      $65,207      $52,982      $31,658     $19,702      $11,594       $1,914
Ratios to average
 net assets:
  Expenses,
   including
   distribution
   fees.............      0.64%(d)     0.64%(d)     0.69%(d)     0.69%        0.74%       0.65%(d)     0.60%(d)     0.60%(c)(d)
  Expenses,
   excluding
   distribution
   fees.............      0.54%(d)     0.54%(d)     0.59%(d)     0.59%        0.64%       0.55%(d)     0.50%(d)     0.50%(c)(d)
  Net investment
   income...........      6.44%(d)     6.58%(d)     6.83%(d)     6.42%        7.04%       7.25%(d)     7.62%(d)     8.17%(c)(d)
Portfolio turnover
 rate...............        26%          35%          39%          36%          27%         34%          29%          44%
 
<FN>
 
- -----------------
(a) Commencement of offering of Class A shares.
(b) Total return does not consider the effects of sales loads. Total return is
    calculated assuming a purchase of shares on the first day and a sale on the
    last day of each period reported and includes reinvestment of dividends and
    distributions. Total returns for periods of less than a full year are not
    annualized.
(c) Annualized.
(d) Net of management fee waiver. See "Manager" in the Statement of Additional
    Information.
</TABLE>
 
                                       6
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                      (HIGH YIELD SERIES - CLASS B SHARES)
 
  The following financial highlights, for the fiscal year ended April 30, 1997,
have been audited by Price Waterhouse LLP, independent accountants, and by
Deloitte & Touche LLP, independent auditors, for the four years ended April 30,
1996. Each of the respective reports by Price Waterhouse LLP and Deloitte &
Touche LLP on such financial highlights were unqualified. This information
should be read in conjunction with the financial statements and notes thereto,
which appear in the Statement of Additional Information. The financial
highlights contain selected data for a Class B share of beneficial interest
outstanding, total return, ratios to average net assets and other supplemental
data for the periods indicated. The information is based on data contained in
the financial statements. Further performance information is contained in the
annual report, which may be obtained without charge. See "Shareholder
Guide--Shareholder Services--Reports to Shareholders."
<TABLE>
<CAPTION>
                                                               HIGH YIELD SERIES
                     ------------------------------------------------------------------------------------------------------
                                                                    CLASS B
                     ------------------------------------------------------------------------------------------------------
                                                             YEARS ENDED APRIL 30,
                     ------------------------------------------------------------------------------------------------------
                       1997      1996        1995          1994          1993          1992          1991          1990
                     --------  --------  ------------  ------------  ------------  ------------  ------------  ------------
PER SHARE OPERATING
 PERFORMANCE:
<S>                  <C>       <C>       <C>           <C>           <C>           <C>           <C>           <C>
Net asset value,
 beginning of
 period.............  $10.69    $10.72        $10.74   $     11.14   $     10.68   $  10.45      $  10.34      $  10.56
                     --------  --------       ------        ------        ------     ------        ------        ------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............     .66(d)     .68(d)         .68(d)         .68         .73       .73(d)        .75(d)        .79(d)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......     .15      (.03)         (.02)         (.39)          .46        .23           .11          (.17)
                     --------  --------       ------        ------        ------     ------        ------        ------
  Total from
   investment
   operations.......     .81       .65           .66           .29          1.19        .96           .86           .62
                     --------  --------       ------        ------        ------     ------        ------        ------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............    (.66)     (.68)         (.68)         (.68)         (.73)      (.73)         (.75)         (.79)
Distributions from
 capital gains......      --        --            --          (.01)           --         --            --          (.05)
                     --------  --------       ------        ------        ------     ------        ------        ------
  Total
   distributions....    (.66)     (.68)         (.68)         (.69)         (.73)      (.73)         (.75)         (.84)
                     --------  --------       ------        ------        ------     ------        ------        ------
Net asset value, end
 of period..........  $10.84    $10.69   $     10.72   $     10.74   $     11.14   $  10.68      $  10.45      $  10.34
                     --------  --------       ------        ------        ------     ------        ------        ------
                     --------  --------       ------        ------        ------     ------        ------        ------
TOTAL RETURN (b):...   7.71%     6.12%         6.37%         2.46%        11.47%      9.40%         8.59%         6.04%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of
 period (000)....... $665,525  $799,048     $934,725    $1,099,640    $1,028,480   $803,838      $701,483      $622,970
Average net assets
 (000).............. $725,305  $900,115   $1,024,132    $1,132,653      $893,203   $759,779      $667,751      $549,485
Ratios to average
 net assets:
  Expenses,
   including
   distribution
   fees.............   1.04%(d)   1.04%(d)       1.09%(d)       1.09%       1.14%     1.05%(d)      1.00%(d)      0.83%(d)
  Expenses,
   excluding
   distribution
   fees.............   0.54%(d)   0.54%(d)       0.59%(d)       0.58%        .64%     0.55%(d)      0.50%(d)      0.33%(d)
  Net investment
   income...........   6.05%(d)   6.19%(d)       6.37%(d)       6.02%       6.66%     6.85%(d)      7.22%(d)      7.24%(d)
Portfolio turnover
 rate...............     26%       35%           39%           36%           27%        34%           29%           44%
 
<CAPTION>
                            HIGH YIELD SERIES
                      -----------------------------
 
                                 CLASS B
 
                      -----------------------------
                                     SEPTEMBER 17,
                                       1987(a) TO
                                       APRIL 30,
                          1989            1988
                      ------------   --------------
PER SHARE OPERATING
 PERFORMANCE:
<S>                  <C>             <C>
Net asset value,
 beginning of
 period.............  $  10.13       $ 10.00
                        ------       -------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............       .86(d)        .53(d)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......       .45           .13
                        ------       -------
  Total from
   investment
   operations.......      1.31           .66
                        ------       -------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............      (.86)         (.53)
Distributions from
 capital gains......      (.02)           --
                        ------       -------
  Total
   distributions....      (.88)         (.53)
                        ------       -------
Net asset value, end
 of period..........  $  10.56       $ 10.13
                        ------       -------
                        ------       -------
TOTAL RETURN (b):...    13.40%         10.68%
RATIOS/SUPPLEMENTAL
Net assets, end of
 period (000).......  $549,426       $48,546
Average net assets
 (000)..............  $185,367       $19,038
Ratios to average
 net assets:
  Expenses,
   including
   distribution
   fees.............     0.27%(d)          0%(d)
  Expenses,
   excluding
   distribution
   fees.............     0.12%(d)          0%(d)
  Net investment
   income...........     7.26%(d)       7.13%(c)(d)
Portfolio turnover
 rate...............       17%            21%
 
<FN>
 
- -----------------
(a) Commencement of offering of Class B shares.
(b) Total return does not consider the effects of sales loads. Total return is
    calculated assuming a purchase of shares on the first day and a sale on the
    last day of each period reported and includes reinvestment of dividends and
    distributions. Total returns for periods of less than a full year are not
    annualized.
(c) Annualized.
(d) Net of expense subsidy, fee waivers and distribution fee deferrals. See
    "Manager" in the Statement of Additional Information.
</TABLE>
 
                                       7
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                      (HIGH YIELD SERIES - CLASS C SHARES)
 
  The following financial highlights for the fiscal year ended April 30, 1997,
have been audited by Price Waterhouse LLP, independent accountants, and by
Deloitte & Touche LLP, independent auditors, for the year ended April 30, 1996
and for the period from August 1, 1994 through April 30, 1995. Each of the
respective reports by Price Waterhouse LLP and Deloitte & Touche LLP on such
financial highlights were unqualified. This information should be read in
conjunction with the financial statements and notes thereto, which appear in the
Statement of Additional Information. The financial highlights contain selected
data for a Class C share of beneficial interest outstanding, total return,
ratios to average net assets and other supplemental data for the periods
indicated. The information is based on data contained in the financial
statements. Further performance information is contained in the annual report,
which may be obtained without charge. See "Shareholder Guide--Shareholder
Services--Reports to Shareholders."
 
<TABLE>
<CAPTION>
                                         HIGH YIELD SERIES
                                ------------------------------------
                                              CLASS C
                                ------------------------------------
                                 YEAR ENDED APRIL       AUGUST 1,
                                        30,              1994(a)
                                -------------------      THROUGH
                                  1997       1996     APRIL 30, 1995
                                --------   --------   --------------
PER SHARE OPERATING
 PERFORMANCE:
<S>                             <C>        <C>        <C>
Net asset value, beginning of
 period.......................  $  10.69   $  10.72   $ 10.79
                                --------   --------    ------
INCOME FROM INVESTMENT
 OPERATIONS
Net investment income (d).....       .63        .65       .49
Net realized and unrealized
 gain (loss) on investment
 transactions.................       .15       (.03)     (.07)
                                --------   --------    ------
  Total from investment
   operations.................       .78        .62       .42
                                --------   --------    ------
LESS DISTRIBUTIONS
Dividends from net investment
 income.......................      (.63)      (.65)     (.49)
                                --------   --------    ------
Net asset value, end of
 period.......................    $10.84     $10.69    $10.72
                                --------   --------    ------
                                --------   --------    ------
TOTAL RETURN (b):.............      7.44%      5.86%     3.91%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period
 (000)........................    $9,563     $6,471    $3,208
Average net assets (000)......    $8,060     $5,608    $1,385
Ratios to average net assets:
  Expenses, including
   distribution fees (d)......      1.29%      1.29%     1.34%(c)
  Expenses, excluding
   distribution fees (d)......      0.54%      0.54%     0.59%(c)
  Net investment income (d)...      5.80%      5.93%     6.34%(c)
Portfolio turnover rate.......        26%        35%       39%
<FN>
- ------------
(a) Commencement of offering of Class C shares.
(b) Total return does not consider the effects of sales loads. Total return is
    calculated assuming a purchase of shares on the first day and a sale on the
    last day of each period reported and includes reinvestment of dividends and
    distributions. Total returns for periods of less than a full year are not
    annualized.
(c) Annualized.
(d) Net of management fee waiver. See "Manager" in the Statement of Additional
    Information.
</TABLE>
 
                                       8
<PAGE>
                              FINANCIAL HIGHLIGHTS
           (FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD INDICATED)
                      (HIGH YIELD SERIES - CLASS Z SHARES)
 
  The following financial highlights for the Class Z shares for the period from
September 16, 1996 through April 30, 1997 have been audited by Price Waterhouse
LLP, independent accountants, whose report thereon was unqualified. This
information should be read in conjunction with the financial statements and the
notes thereto, which appear in the Statement of Additional Information. The
financial highlights contain selected data for a Class Z share of common stock
outstanding, total return, ratios to average net assets and other supplemental
data for the period indicated. This information has been determined based on
data contained in the financial statements. Further performance information is
contained in the annual report, which may be obtained without charge. See
"Shareholder Guide--Shareholder Services--Reports to Shareholders."
 
<TABLE>
<CAPTION>
                                                              HIGH YIELD SERIES
                                                              -----------------
                                                                   CLASS Z
                                                              -----------------
                                                                SEPTEMBER 16,
                                                                   1996(a)
                                                                   THROUGH
                                                               APRIL 30, 1997
                                                              -----------------
<S>                                                           <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period........................       $ 10.79
                                                                   -------
INCOME FROM INVESTMENT OPERATIONS
Net investment income (d)...................................           .45
Net realized and unrealized gain (loss) on investment
 transactions...............................................           .04
                                                                   -------
    Total from investment operations........................           .49
                                                                   -------
LESS DISTRIBUTIONS
Dividends from net investment income........................          (.45)
                                                                   -------
Net asset value, end of period..............................       $ 10.83
                                                                   -------
                                                                   -------
TOTAL RETURN(b):............................................          4.36%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period (000).............................        $2,719
Average net assets (000)....................................          $704
Ratios to average net assets:
    Expenses (d)............................................          0.54%(c)
    Net investment income (d)...............................          6.55%(c)
Portfolio turnover rate.....................................            26%
<FN>
- ------------
(a) Commencement of offering of Class Z shares.
(b) Total return does not consider the effects of sales loads. Total return is
    calculated assuming a purchase of shares on the first day and a sale on the
    last day of the period reported and includes reinvestment of dividends and
    distributions. Total returns for periods of less than a full year are not
    annualized.
(c) Annualized.
(d) Net of management fee waiver. See "Manager" in the Statement of Additional
    Information.
</TABLE>
 
                                       9
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                       (INSURED SERIES - CLASS A SHARES)
 
  The following financial highlights, for the fiscal year ended April 30, 1997,
have been audited by Price Waterhouse LLP, independent accountants, and by
Deloitte & Touche LLP, independent auditors, for the four years ended April 30,
1996. Each of the respective reports by Price Waterhouse LLP and Deloitte &
Touche LLP on such financial highlights were unqualified. This information
should be read in conjunction with the financial statements and notes thereto,
which appear in the Statement of Additional Information. The financial
highlights contain selected data for a Class A share of beneficial interest
outstanding, total return, ratios to average net assets and other supplemental
data for the periods indicated. The information is based on data contained in
the financial statements. Further performance information is contained in the
annual report, which may be obtained without charge. See "Shareholder
Guide--Shareholder Services--Reports to Shareholders."
 
<TABLE>
<CAPTION>
                                                               INSURED SERIES
                      ------------------------------------------------------------------------------------------------
                                                                  CLASS A
                      ------------------------------------------------------------------------------------------------
                                                                                                          JANUARY 22,
                                                                                                            1990(a)
                                                   YEARS ENDED APRIL 30,                                 THROUGH APRIL
                      --------------------------------------------------------------------------------        30,
                        1997       1996       1995       1994       1993        1992          1991           1990
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
PER SHARE OPERATING
 PERFORMANCE:
<S>                   <C>        <C>        <C>        <C>        <C>        <C>           <C>           <C>
Net asset value,
 beginning of
 period.............   $10.94     $10.83     $10.71     $11.44     $10.98     $10.76        $10.25       $10.51
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............      .55(d)     .58(d)     .58(d)     .58        .61        .66(d)        .67(d)       .18(d)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......      .08        .11        .12       (.43)       .73        .24           .54         (.26)
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
  Total from
   investment
   operations.......      .63        .69        .70        .15       1.34        .90          1.21         (.08)
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............     (.55)      (.58)      (.58)      (.58)      (.61)      (.66)         (.67)        (.18)
Distributions in
 excess of net
 investment
 income.............     (.01)        --         --         --         --         --            --           --
Distributions from
 capital gains......     (.11)        --         --       (.30)      (.27)      (.02)         (.03)          --
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
  Total
   distributions....     (.67)      (.58)      (.58)      (.88)      (.88)      (.68)         (.70)        (.18)
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
Net asset value, end
 of period..........   $10.90     $10.94     $10.83     $10.71     $11.44     $10.98        $10.76       $10.25
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
                      --------   --------   --------   --------   --------   -----------   -----------   -------------
TOTAL RETURN (b):...     5.74%      6.47%      6.73%      1.04%     12.68%      8.59%        11.86%       (3.37)%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of
 period (000).......  $208,411   $139,548   $75,800    $30,669    $30,098    $19,177        $7,630       $2,700
Average net assets
 (000)..............  $187,371   $102,456   $39,471    $32,309    $24,589    $12,731        $5,164       $1,280
Ratios to average
 net assets:
  Expenses,
   including
   distribution
   fees.............     0.68%(d)    0.68%(d)    0.74%(d)    0.71%    0.72%     0.62%(d)      0.61%(d)     0.62%(c)(d)
  Expenses,
   excluding
   distribution
   fees.............     0.58%(d)    0.58%(d)    0.64%(d)    0.61%    0.62%     0.52%(d)      0.51%(d)     0.52%(c)(d)
  Net investment
   income...........     4.95%(d)    5.20%(d)    5.45%(d)    5.09%    5.46%     6.06%(d)      6.38%(d)     6.64%(c)(d)
Portfolio turnover
 rate...............      110%        68%        64%       105%        85%        56%           51%          82%
<FN>
- -----------------
(a)  Commencement of offering of Class A shares.
(b)  Total return does not consider the effects of sales loads. Total return is
     calculated assuming a purchase of shares on the first day and a sale on the
     last day of each period reported and includes reinvestment of dividends and
     distributions. Total returns for periods of less than a full year are not
     annualized.
(c)  Annualized.
(d)  Net of management fee waiver. See "Manager" in the Statement of Additional
     Information.
</TABLE>
 
                                       10
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                       (INSURED SERIES - CLASS B SHARES)
 
  The following financial highlights, with respect to the fiscal year ended
April 30, 1997, have been audited by Price Waterhouse LLP, independent
accountants, and by Deloitte & Touche LLP, independent auditors, for the four
years ended April 30, 1996. Each of the respective reports by Price Waterhouse
LLP and Deloitte & Touche LLP on such financial highlights were unqualified.
This information should be read in conjunction with the financial statements and
notes thereto, which appear in the Statement of Additional Information. The
financial highlights contain selected data for a Class B share of beneficial
interest outstanding, total return, ratios to average net assets and other
supplemental data for the periods indicated. The information is based on data
contained in the financial statements. Further performance information is
contained in the annual report, which may be obtained without charge. See
"Shareholder Guide--Shareholder Services--Reports to Shareholders."
<TABLE>
<CAPTION>
                                                                 INSURED SERIES
                      ----------------------------------------------------------------------------------------------------
                                                                    CLASS B
                      ----------------------------------------------------------------------------------------------------
                                                             YEARS ENDED APRIL 30,
                      ----------------------------------------------------------------------------------------------------
                        1997       1996       1995       1994        1993           1992           1991           1990
                      --------   --------   --------   --------   -----------   ------------   ------------   ------------
PER SHARE OPERATING
 PERFORMANCE:
<S>                   <C>        <C>        <C>        <C>        <C>           <C>            <C>            <C>
Net asset value,
 beginning of
 period.............   $10.95     $10.84     $10.71    $ 11.44    $    10.99    $  10.76       $  10.25       $  10.54
                      --------   --------   --------   --------   -----------     ------         ------         ------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............      .50(e)     .54(e)     .54(e)     .54           .56         .62(e)         .63(e)         .67(e)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......      .08        .11        .13       (.43)          .72         .25            .54           (.22)
                      --------   --------   --------   --------   -----------     ------         ------         ------
  Total from
   investment
   operations.......      .58        .65        .67        .11          1.28         .87           1.17            .45
                      --------   --------   --------   --------   -----------     ------         ------         ------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............     (.50)      (.54)      (.54)      (.54)         (.56)       (.62)          (.63)          (.67)
Distributions in
 excess of net
 investment
 income.............     (.01)        --         --         --            --          --             --             --
Distributions from
 capital gains......     (.11)        --         --       (.30)         (.27)       (.02)          (.03)          (.07)
                      --------   --------   --------   --------   -----------     ------         ------         ------
  Total
   distributions....     (.62)      (.54)      (.54)      (.84)         (.83)       (.64)          (.66)          (.74)
                      --------   --------   --------   --------   -----------     ------         ------         ------
Net asset value, end
 of period..........   $10.91     $10.95     $10.84    $ 10.71    $    11.44    $  10.99       $  10.76       $  10.25
                      --------   --------   --------   --------   -----------     ------         ------         ------
                      --------   --------   --------   --------   -----------     ------         ------         ------
TOTAL RETURN (c):...    5.32%      6.04%      6.40%      0.63%        12.14%       8.24%         11.43%          4.36%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of
 period (000).......  $298,005   $443,391   $567,648   $740,447     $770,060    $638,451       $578,412       $497,139
Average net assets
 (000)..............  $365,891   $524,452   $660,237   $807,794     $705,846    $609,516       $537,275       $446,904
Ratios to average net assets:
  Expenses,
   including
   distribution
   fees.............    1.08%(e)   1.08%(e)   1.14%(e)   1.11%         1.12%       1.02%(e)       1.01%(e)       0.85%(e)
  Expenses,
   excluding
   distribution
   fees.............    0.58%(e)   0.58%(e)   0.64%(e)   0.61%         0.62%       0.52%(e)       0.51%(e)       0.35%(e)
  Net investment
   income...........    4.54%(e)   4.80%(e)   4.99%(e)   4.69%         5.06%       5.66%(e)       5.98%(e)       6.07%(e)
Portfolio turnover
 rate...............     110%        68%        64%       105%           85%         56%            51%            82%
 
<CAPTION>
                             INSURED SERIES
                      -----------------------------
 
                                 CLASS B
 
                      -----------------------------
                                     SEPTEMBER 17,
                                       1987(a) TO
                                       APRIL 30,
                          1989          1988(b)
                      ------------   --------------
PER SHARE OPERATING
 PERFORMANCE:
<S>                   <C>            <C>
Net asset value,
 beginning of
 period.............  $  10.18       $ 10.00
                        ------        ------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............       .76(e)        .42(e)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......       .42           .18
                        ------        ------
  Total from
   investment
   operations.......      1.18           .60
                        ------        ------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............      (.76)         (.42)
Distributions in
 excess of net
 investment
 income.............        --            --
Distributions from
 capital gains......      (.06)           --
                        ------        ------
  Total
   distributions....      (.82)         (.42)
                        ------        ------
Net asset value, end
 of period..........  $  10.54       $ 10.18
                        ------        ------
                        ------        ------
TOTAL RETURN (c):...    11.97%         9.76%
RATIOS/SUPPLEMENTAL
Net assets, end of
 period (000).......  $447,101       $45,058
Average net assets
 (000)..............  $160,158       $19,378
Ratios to average ne
  Expenses,
   including
   distribution
   fees.............     0.22%(e)         0%(e)
  Expenses,
   excluding
   distribution
   fees.............     0.13%(e)         0%(e)
  Net investment
   income...........     6.52%(e)      6.34%(d)(e)
Portfolio turnover
 rate...............       87%          117%
<FN>
- -----------------
(a)  Commencement of offering of Class B shares.
(b)  On March 1, 1988, Prudential Mutual Fund Management, Inc. succeeded The
     Prudential Insurance Company of America as Manager of the Fund.
(c)  Total return does not consider the effects of sales loads. Total return is
     calculated assuming a purchase of shares on the first day and a sale on the
     last day of each period reported and includes reinvestment of dividends and
     distributions. Total returns for periods of less than a full year are not
     annualized.
(d)  Annualized.
(e)  Net of expense subsidy, fee waivers and distribution fee deferrals. See
     "Manager" in the Statement of Additional Information.
</TABLE>
 
                                       11
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                       (INSURED SERIES - CLASS C SHARES)
 
  The following financial highlights, for the fiscal year ended April 30, 1997,
have been audited by Price Waterhouse LLP, independent accountants, and by
Deloitte & Touche LLP, independent auditors, for the year ended April 30, 1996
and the period August 1, 1994 through April 30, 1995. Each of the respective
reports by Price Waterhouse LLP and Deloitte & Touche LLP on such financial
highlights were unqualified. This information should be read in conjunction with
the financial statements and notes thereto, which appear in the Statement of
Additional Information. The financial highlights contain selected data for a
Class C share of beneficial interest outstanding, total return, ratios to
average net assets and other supplemental data for the periods indicated. The
information is based on data contained in the financial statements. Further
performance information is contained in the annual report, which may be obtained
without charge. See "Shareholder Guide--Shareholder Services--Reports to
Shareholders."
 
<TABLE>
<CAPTION>
                                             INSURED SERIES
                               -------------------------------------------
                                                 CLASS C
                               -------------------------------------------
                                                              AUGUST 1,
                                                               1994(a)
                                  YEAR ENDED APRIL 30,      THROUGH APRIL
                               --------------------------        30,
                                   1997          1996            1995
                               ------------  ------------   --------------
PER SHARE OPERATING PERFORMANCE:
<S>                            <C>           <C>            <C>
Net asset value, beginning of
 period....................... $  10.95      $  10.84       $ 10.79
                                 ------        ------        ------
INCOME FROM INVESTMENT
 OPERATIONS
Net investment income (d).....      .48           .51           .39
Net realized and unrealized
 gain (loss) on investment
 transactions.................      .08           .11           .05
                                 ------        ------        ------
  Total from investment
   operations.................      .56           .62           .44
                                 ------        ------        ------
LESS DISTRIBUTIONS
Dividends from net investment
 income.......................     (.48)         (.51)         (.39)
Distributions in excess of net
 investment income............     (.01)           --            --
Distributions from capital
 gains........................     (.11)           --            --
                                 ------        ------        ------
  Total distributions.........     (.60)         (.51)         (.39)
                                 ------        ------        ------
Net asset value, end of
 period.......................   $10.91        $10.95        $10.84
                                 ------        ------        ------
                                 ------        ------        ------
TOTAL RETURN (b):.............    5.06%         5.78%         4.03%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period
 (000)........................ $    888      $  1,137       $   525
Average net assets (000)...... $    973      $    827       $   224
Ratios to average net assets:
  Expenses, including
   distribution fees (d)......    1.33%         1.33%         1.39%(c)
  Expenses, excluding
   distribution fees (d)......    0.58%         0.58%         0.64%(c)
  Net investment income (d)...    4.29%         4.56%         4.92%(c)
Portfolio turnover rate.......      110%           68%           64%
<FN>
- -------------
(a)  Commencement of offering of Class C shares.
(b)  Total return does not consider the effects of sales loads. Total return is
     calculated assuming a purchase of shares on the first day and a sale on the
     last day of each period reported and includes reinvestment of dividends and
     distributions. Total returns for periods of less than a full year are not
     annualized.
(c)  Annualized.
(d)  Net of management fee waiver. See "Manager" in the Statement of Additional
     Information.
</TABLE>
 
                                       12
<PAGE>
                              FINANCIAL HIGHLIGHTS
           (FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD INDICATED)
                       (INSURED SERIES - CLASS Z SHARES)
 
  The following financial highlights for the Class Z shares have been audited by
Price Waterhouse LLP, independent accountants, whose report thereon was
unqualified. This information should be read in conjunction with the financial
statements and the notes thereto, which appear in the Statement of Additional
Information. The financial highlights contain selected data for a Class Z share
of common stock outstanding, total return, ratios to average net assets and
other supplemental data for the period indicated. This information has been
determined based on data contained in the financial statements. Further
performance information is contained in the annual report, which may be obtained
without charge. See "Shareholder Guide--Shareholder Services--Reports to
Shareholders."
 
<TABLE>
<CAPTION>
                                                               INSURED SERIES
                                                                   CLASS Z
                                                                SEPTEMBER 16,
                                                                   1996(a)
                                                                   THROUGH
                                                               APRIL 30, 1997
                                                              -----------------
<S>                                                           <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period........................       $ 11.05
                                                                   -------
INCOME FROM INVESTMENT OPERATIONS
Net investment income (d)...................................           .36
Net realized and unrealized gain (loss) on investment
 transactions...............................................          (.02)
                                                                   -------
    Total from investment operations........................           .34
                                                                   -------
LESS DISTRIBUTIONS
Dividends from net investment income........................          (.36)
Distributions in excess of net investment income............          (.01)
Distributions from capital gains............................          (.11)
                                                                   -------
    Total distributions.....................................          (.48)
                                                                   -------
Net asset value, end of period..............................       $ 10.91
                                                                   -------
                                                                   -------
TOTAL RETURN (b):...........................................          2.86%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period (000).............................           $15
Average net assets (000)....................................           $10
Ratios to average net assets:
    Expenses (d)............................................          0.58%(c)
    Net investment income (d)...............................          4.18%(c)
Portfolio turnover rate.....................................           110%
<FN>
- ------------
(a) Commencement of offering of Class Z shares.
(b) Total return does not consider the effects of sales loads. Total return is
    calculated assuming a purchase of shares on the first day and a sale on the
    last day of the period reported and includes reinvestment of dividends and
    distributions. Total returns for periods of less than a full year are not
    annualized.
(c) Annualized.
(d) Net of management fee waiver. See "Manager" in the Statement of Additional
    Information.
</TABLE>
 
                                       13
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                     (INTERMEDIATE SERIES - CLASS A SHARES)
 
  The following financial highlights, with respect to the fiscal year ended
April 30, 1997, have been audited by Price Waterhouse LLP, independent
accountants, and by Deloitte & Touche LLP, independent auditors, for the four
years ended April 30, 1996. Each of the respective reports by Price Waterhouse
LLP and Deloitte & Touche LLP on such financial highlights were unqualified.
This information should be read in conjunction with the financial statements and
notes thereto, which appear in the Statement of Additional Information. The
financial highlights contain selected data for a Class A share of beneficial
interest outstanding, total return, ratios to average net assets and other
supplemental data for the periods indicated. The information is based on data
contained in the financial statements. Further performance information is
contained in the annual report, which may be obtained without charge. See
"Shareholder Guide--Shareholder Services--Reports to Shareholders."
 
<TABLE>
<CAPTION>
                                                           INTERMEDIATE SERIES
                       -------------------------------------------------------------------------------------------
                                                                 CLASS A
                       -------------------------------------------------------------------------------------------
                                                                                                           JANUARY
                                                                                                             22,
                                                                                                           1990(a)
                                                                                                           THROUGH
                                                    YEARS ENDED APRIL 30,                                   APRIL
                       --------------------------------------------------------------------------------      30,
                         1997        1996        1995        1994        1993        1992        1991       1990
                       --------    --------    --------    --------    --------    --------    --------    -------
PER SHARE OPERATING
 PERFORMANCE:
<S>                    <C>         <C>         <C>         <C>         <C>         <C>         <C>         <C>
Net asset value,
 beginning of
 period.............   $ 10.65     $ 10.45     $ 10.67     $ 11.08     $ 10.59     $ 10.48     $  9.98     $10.21
                       --------    --------    --------    --------    --------    --------    --------    -------
INCOME FROM
 INVESTMENT
 OPERATIONS
Net investment
 income.............       .46(d)      .47(d)      .51(d)      .53         .54(d)      .57(d)      .59(d)     .18(d)
Net realized and
 unrealized gain
 (loss) on
 investment
 transactions.......      (.05)        .20        (.03)       (.19)        .60         .26         .50       (.23)
                       --------    --------    --------    --------    --------    --------    --------    -------
  Total from
   investment
   operations.......       .41         .67         .48         .34        1.14         .83        1.09       (.05)
                       --------    --------    --------    --------    --------    --------    --------    -------
LESS DISTRIBUTIONS
Dividends from net
 investment
 income.............      (.46)       (.47)       (.51)       (.53)       (.54)       (.57)       (.59)      (.18)
Distributions in
 excess of net
 investment
 income.............      (.01)         --        (.01)         --          --          --          --         --
Distributions from
 capital gains......        --          --        (.18)       (.22)       (.11)       (.15)         --         --
                       --------    --------    --------    --------    --------    --------    --------    -------
  Total
   distributions....      (.47)       (.47)       (.70)       (.75)       (.65)       (.72)       (.59)      (.18)
                       --------    --------    --------    --------    --------    --------    --------    -------
Net asset value, end
 of period..........    $10.59      $10.65      $10.45     $ 10.67     $ 11.08     $ 10.59     $ 10.48     $ 9.98
                       --------    --------    --------    --------    --------    --------    --------    -------
                       --------    --------    --------    --------    --------    --------    --------    -------
TOTAL RETURN (b):...      3.86%       6.48%       4.52%       2.83%      11.13%       8.14%      11.20%     (2.49)%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of
 period (000).......   $13,740     $12,552     $10,507      $5,810      $3,594      $1,424        $397       $164
Average net assets
 (000)..............   $13,487     $12,604      $7,742      $4,981      $1,883       $ 599        $305        $80
Ratios to average
 net assets:
  Expenses,
   including
   distribution
   fees.............      1.15%(d)    1.16%(d)    1.05%(d)    1.00%       1.06%(d)    1.06%(d)    0.92%(d)   0.63%(c)(d)
  Expenses,
   excluding
   distribution
   fees.............      1.05%(d)    1.06%(d)    0.95%(d)    0.90%       0.96%(d)    0.96%(d)    0.82%(d)   0.53%(c)(d)
  Net investment
   income...........      4.30%(d)    4.36%(d)    4.75%(d)    4.63%       5.09%(d)    5.41%(d)    5.92%(d)   6.26%(c)(d)
Portfolio turnover
 rate...............        46%         35%         30%         55%         22%         78%        128%        91%
<FN>
- ---------------
(a)  Commencement of offering of Class A shares.
(b)  Total return does not consider the effects of sales loads. Total return is
     calculated assuming a purchase of shares on the first day and a sale on the
     last day of each period reported and includes reinvestment of dividends and
     distributions. Total returns for periods of less than a full year are not
     annualized.
(c)  Annualized.
(d)  Net of management fee waiver. See "Manager" in the Statement of Additional
     Information.
</TABLE>
 
                                       14
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                     (INTERMEDIATE SERIES - CLASS B SHARES)
 
  The following financial highlights, with respect to the fiscal year ended
April 30, 1997, have been audited by Price Waterhouse LLP, independent
accountants, and by Deloitte & Touche LLP, independent auditors, for the four
years ended April 30, 1996. Each of the respective reports by Price Waterhouse
LLP and Deloitte & Touche LLP on such financial highlights were unqualified.
This information should be read in conjunction with the financial statements and
notes thereto, which appear in the Statement of Additional Information. The
financial highlights contain selected data for a Class B share of beneficial
interest outstanding, total return, ratios to average net assets and other
supplemental data for the periods indicated. The information is based on data
contained in the financial statements. Further performance information is
contained in the annual report, which may be obtained without charge. See
"Shareholder Guide--Shareholder Services--Reports to Shareholders."
<TABLE>
<CAPTION>
                                                                    INTERMEDIATE SERIES
                                 ------------------------------------------------------------------------------------------
                                                                          CLASS B
                                 ------------------------------------------------------------------------------------------
                                                                   YEARS ENDED APRIL 30,
                                 ------------------------------------------------------------------------------------------
                                  1997       1996       1995       1994         1993         1992        1991        1990
                                 -------    -------    -------    -------    ----------    --------    --------    --------
<S>                              <C>        <C>        <C>        <C>        <C>           <C>         <C>         <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning of
 period.......................   $10.65     $10.45     $10.68     $11.09     $   10.60     $ 10.48     $  9.98     $ 10.17
                                 -------    -------    -------    -------    ----------    --------    --------    --------
INCOME FROM INVESTMENT OPERATIONS
Net investment income.........      .42(e)     .43(e)     .45(e)     .48           .50(e)      .53(e)      .56(e)      .62(e)
Net realized and unrealized
 gain (loss) on investment
 transactions.................     (.05)       .20       (.04)      (.19)          .60         .27         .50        (.16)
                                 -------    -------    -------    -------    ----------    --------    --------    --------
  Total from investment
   operations.................      .37        .63        .41        .29          1.10         .80        1.06         .46
                                 -------    -------    -------    -------    ----------    --------    --------    --------
LESS DISTRIBUTIONS
Dividends from net investment
 income.......................     (.42)      (.43)      (.45)      (.48)         (.50)       (.53)       (.56)       (.62)
Distributions in excess of net
 investment income............     (.01)        --       (.01)        --            --          --          --          --
Distributions from capital
 gains........................       --         --       (.18)      (.22)         (.11)       (.15)         --        (.03)
                                 -------    -------    -------    -------    ----------    --------    --------    --------
  Total distributions.........     (.43)      (.43)      (.64)      (.70)         (.61)       (.68)       (.56)       (.65)
                                 -------    -------    -------    -------    ----------    --------    --------    --------
Net asset value, end of
 period.......................   $10.59     $10.65     $10.45     $10.68     $   11.09     $ 10.60     $ 10.48     $  9.98
                                 -------    -------    -------    -------    ----------    --------    --------    --------
                                            -------    -------    -------    ----------    --------    --------    --------
TOTAL RETURN (c):.............     3.44%      6.05%      3.99%      2.43%        10.62%       7.68%      10.82%       4.61%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period
 (000)........................   $29,980    $40,550    $51,039    $65,215      $57,049     $45,401     $45,401     $47,838
Average net assets (000)......   $35,221    $46,127    $60,174    $59,811      $50,154     $44,439     $46,521     $46,246
Ratios to average net assets:
  Expenses, including
   distribution fees..........     1.55%(e)   1.56%(e)   1.45%(e)   1.40%         1.46%(e)    1.46%(e)    1.32%(e)    0.83%(e)
  Expenses, excluding
   distribution fees..........     1.05%(e)   1.06%(e)   0.95%(e)   0.90%         0.96%(e)    0.96%(e)    0.82%(e)    0.33%(e)
  Net investment income.......     3.89%(e)   3.96%(e)   4.35%(e)   4.23%         4.69%(e)    5.01%(e)    5.52%(e)    6.03%(e)
Portfolio turnover rate.......       46%        35%        30%        55%           22%         78%        128%         91%
 
<CAPTION>
                                   INTERMEDIATE SERIES
                                --------------------------
 
                                         CLASS B
                                --------------------------
                                             SEPTEMBER 17,
                                                1987(a)
                                             TO APRIL 30,
                                  1989          1988(B)
                                ---------    -------------
<S>                              <C>         <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning of
 period.......................  $  10.14     $      10.00
                                ---------          ------
INCOME FROM INVESTMENT OPERATI
Net investment income.........       .70(e)           .43(e)
Net realized and unrealized
 gain (loss) on investment
 transactions.................       .09              .14
                                ---------          ------
  Total from investment
   operations.................       .79              .57
                                ---------          ------
LESS DISTRIBUTIONS
Dividends from net investment
 income.......................      (.70)            (.43)
Distributions in excess of net
 investment income............        --               --
Distributions from capital
 gains........................      (.06)              --
                                ---------          ------
  Total distributions.........      (.76)            (.43)
                                ---------          ------
Net asset value, end of
 period.......................  $  10.17     $      10.14
                                ---------          ------
                                ---------          ------
TOTAL RETURN (c):.............      8.21%            9.07%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period
 (000)........................   $45,362          $17,102
Average net assets (000)......   $30,515           $6,298
Ratios to average net assets:
  Expenses, including
   distribution fees..........      0.15%(e)            0%(e)
  Expenses, excluding
   distribution fees..........      0.05%(e)            0%(e)
  Net investment income.......      6.59%(e)         6.16%(d)(e)
Portfolio turnover rate.......       135%              54%
<FN>
- -----------------
(a)  Commencement of offering of Class B shares.
(b)  On March 1, 1988, Prudential Mutual Fund Management, Inc. succeeded The
     Prudential Insurance Company of America as Manager of the Fund.
(c)  Total return does not consider the effects of sales loads. Total return is
     calculated assuming a purchase of shares on the first day and a sale on the
     last day of each period reported and includes reinvestment of dividends and
     distributions. Total returns for periods of less than a full year are not
     annualized.
(d)  Annualized.
(e)  Net of expense subsidy, fee waivers and distribution fee deferrals. See
     "Manager" in the Statement of Additional Information.
</TABLE>
 
                                       15
<PAGE>
                              FINANCIAL HIGHLIGHTS
       (FOR A SHARE OUTSTANDING THROUGHOUT EACH OF THE INDICATED PERIODS)
                     (INTERMEDIATE SERIES - CLASS C SHARES)
 
  The following financial highlights, with respect to the fiscal year ended
April 30, 1997 have been audited by Price Waterhouse LLP, independent
accountants, and by Deloitte & Touche LLP, independent auditors, for the year
ended April 30, 1996 and the period August 1, 1994 through April 30, 1995. Each
of the respective reports by Price Waterhouse LLP and Deloitte & Touche LLP on
such financial highlights were unqualified. This information should be read in
conjunction with the financial statements and notes thereto, which appear in the
Statement of Additional Information. The financial highlights contain selected
data for a Class C share of beneficial interest outstanding, total return,
ratios to average net assets and other supplemental data for the periods
indicated. The information is based on data contained in the financial
statements. Further performance information is contained in the annual report,
which may be obtained without charge. See "Shareholder Guide--Shareholder
Services--Reports to Shareholders."
 
<TABLE>
<CAPTION>
                                           INTERMEDIATE SERIES
                               -------------------------------------------
                                                 CLASS C
                               -------------------------------------------
                                  YEAR ENDED APRIL 30,        AUGUST 1,
                                                               1994(a)
                               --------------------------   THROUGH APRIL
                                   1997          1996          30, 1995
                                  ------        ------      --------------
PER SHARE OPERATING PERFORMANCE:
<S>                            <C>           <C>            <C>
Net asset value, beginning of
 period.......................       $10.65        $10.45    $10.54
                                     ------        ------    ------
INCOME FROM INVESTMENT
 OPERATIONS
Net investment income (d).....          .39           .40       .35
Net realized and unrealized
 gain (loss) on investment
 transactions.................         (.05)          .20      (.08)
                                     ------        ------    ------
  Total from investment
   operations.................          .34           .60       .27
                                     ------        ------    ------
LESS DISTRIBUTIONS
Dividends from net investment
 income.......................         (.39)         (.40)     (.35)
Distributions in excess of net
 investment income............         (.01)           --      (.01)
                                     ------        ------    ------
  Total distributions.........         (.40)         (.40)     (.36)
                                     ------        ------    ------
Net asset value, end of
 period.......................       $10.59        $10.65    $10.45
                                     ------        ------    ------
                                     ------        ------    ------
TOTAL RETURN (b):.............        3.17%         5.79%     2.14%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period
 (000)........................ $        257  $        225   $   167
Average net assets (000)...... $        149  $        197   $    28
Ratios to average net assets:
  Expenses, including
   distribution fees (d)......        1.80%         1.81%     1.81%(c)
  Expenses, excluding
   distribution fees (d)......        1.05%         1.06%     1.06%(c)
  Net investment income (d)...        3.65%         3.71%     4.34%(c)
Portfolio turnover rate.......          46%           35%       30%
<FN>
- -------------
(a)  Commencement of offering of Class C shares.
(b)  Total return does not consider the effects of sales loads. Total return is
     calculated assuming a purchase of shares on the first day and a sale on the
     last day of each period reported and includes reinvestment of dividends and
     distributions. Total returns for periods of less than a full year are not
     annualized.
(c)  Annualized.
(d)  Net of management fee waiver. See "Manager" in the Statement of Additional
     Information.
</TABLE>
 
                                       16
<PAGE>
                              FINANCIAL HIGHLIGHTS
           (FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD INDICATED)
                     (INTERMEDIATE SERIES - CLASS Z SHARES)
 
  The following financial highlights for the Class Z shares have been audited by
Price Waterhouse LLP, independent accountants, whose report thereon was
unqualified. This information should be read in conjunction with the financial
statements and the notes thereto, which appear in the Statement of Additional
Information. The financial highlights contain selected data for a Class Z share
of common stock outstanding, total return, ratios to average net assets and
other supplemental data for the period indicated. This information has been
determined based on data contained in the financial statements. Further
performance information is contained in the annual report, which may be obtained
without charge. See "Shareholder Guide--Shareholder Services--Reports to
Shareholders."
 
<TABLE>
<CAPTION>
                                                                INTERMEDIATE
                                                                   SERIES
                                                                   CLASS Z
                                                                SEPTEMBER 16,
                                                                   1996(a)
                                                                   THROUGH
                                                               APRIL 30, 1997
                                                              -----------------
<S>                                                           <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period........................       $ 10.63
                                                                   -------
INCOME FROM INVESTMENT OPERATIONS
Net investment income (d)...................................           .31
Net realized and unrealized gain (loss) on investment
 transactions...............................................          (.03)
                                                                   -------
    Total from investment operations........................           .28
                                                                   -------
LESS DISTRIBUTIONS
Dividends from net investment income........................          (.31)
Distributions in excess of net investment income............          (.01)
                                                                   -------
Total distributions.........................................          (.32)
                                                                   -------
Net asset value, end of period..............................       $ 10.59
                                                                   -------
                                                                   -------
TOTAL RETURN(b):............................................          2.50%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period (000).............................          $246
Average net assets (000)....................................           $63
Ratios to average net assets:
    Expenses (d)............................................          1.05%(c)
    Net investment income (d)...............................          4.65%(c)
Portfolio turnover rate.....................................            46%
<FN>
- ------------
(a) Commencement of offering of Class Z shares.
(b) Total return does not consider the effects of sales loads. Total return is
    calculated assuming a purchase of shares on the first day and a sale on the
    last day of the period reported and includes reinvestment of dividends and
    distributions. Total returns for periods of less than a full year are not
    annualized.
(c) Annualized.
(d) Net of management fee waiver. See "Manager" in the Statement of Additional
    Information.
</TABLE>
 
                                       17
<PAGE>
                              HOW THE FUND INVESTS
 
INVESTMENT OBJECTIVES AND POLICIES
 
  THE FUND IS COMPRISED OF THREE SEPARATE DIVERSIFIED PORTFOLIOS--THE HIGH YIELD
SERIES, THE INSURED SERIES AND THE INTERMEDIATE SERIES--EACH OF WHICH IS, IN
EFFECT, A SEPARATE FUND ISSUING ITS OWN SHARES. THE INVESTMENT OBJECTIVES OF THE
SERIES ARE AS FOLLOWS: (i) THE OBJECTIVE OF THE HIGH YIELD SERIES IS TO PROVIDE
THE MAXIMUM AMOUNT OF INCOME THAT IS ELIGIBLE FOR EXCLUSION FROM FEDERAL INCOME
TAXES, (ii) THE OBJECTIVE OF THE INSURED SERIES IS TO PROVIDE THE MAXIMUM AMOUNT
OF INCOME THAT IS ELIGIBLE FOR EXCLUSION FROM FEDERAL INCOME TAXES CONSISTENT
WITH THE PRESERVATION OF CAPITAL AND (iii) THE OBJECTIVE OF THE INTERMEDIATE
SERIES IS TO PROVIDE A HIGH LEVEL OF INCOME THAT IS ELIGIBLE FOR EXCLUSION FROM
FEDERAL INCOME TAXES CONSISTENT WITH THE PRESERVATION OF CAPITAL. THERE CAN BE
NO ASSURANCE THAT SUCH OBJECTIVES WILL BE ACHIEVED. See "Investment Objectives
and Policies" in the Statement of Additional Information. Although each Series
will seek income that is eligible for exclusion from federal income taxes, a
portion of the dividends and distributions paid by each Series (and, in
particular, the High Yield Series) may be treated as a preference item for
purposes of the alternative minimum tax. See "Taxes, Dividends and
Distributions."
 
  As with an investment in any mutual fund, an investment in any Series of this
Fund can decrease in value and you can lose money.
 
  EACH SERIES' INVESTMENT OBJECTIVE IS A FUNDAMENTAL POLICY AND, THEREFORE, MAY
NOT BE CHANGED WITHOUT THE APPROVAL OF THE HOLDERS OF A MAJORITY OF THE
OUTSTANDING VOTING SECURITIES OF THE SERIES AS DEFINED IN THE INVESTMENT COMPANY
ACT OF 1940, AS AMENDED (THE INVESTMENT COMPANY ACT). POLICIES OF THE SERIES
THAT ARE NOT FUNDAMENTAL MAY BE MODIFIED BY THE TRUSTEES.
 
  EACH SERIES PURSUES ITS INVESTMENT OBJECTIVE THROUGH THE SEPARATE INVESTMENT
POLICIES DESCRIBED BELOW. These policies differ with respect to the maturity and
quality of portfolio securities in which a Series may invest and can affect the
yield for each Series and the degree of market risk and credit risk to which
each Series is subject.
 
  EACH SERIES WILL SEEK TO ACHIEVE ITS INVESTMENT OBJECTIVE BY INVESTING IN A
PORTFOLIO OF OBLIGATIONS ISSUED BY OR ON BEHALF OF STATES, TERRITORIES AND
POSSESSIONS OF THE UNITED STATES AND THE DISTRICT OF COLUMBIA AND THEIR
POLITICAL SUBDIVISIONS, AGENCIES AND INSTRUMENTALITIES, THE INTEREST ON WHICH IS
GENERALLY ELIGIBLE FOR EXCLUSION FROM FEDERAL INCOME TAXATION (MUNICIPAL
OBLIGATIONS OR MUNICIPAL SECURITIES). THE PORTFOLIO SECURITIES HELD BY EACH OF
THE SERIES WILL VARY WITH RESPECT TO YIELD, MARKET PRICE VOLATILITY AND QUALITY.
Generally, municipal obligations with longer maturities produce higher yields
and are subject to greater price fluctuations as a result of changes in interest
rates (market risk) than municipal obligations with shorter maturities. The
prices of municipal obligations vary inversely with interest rates. In addition,
lower rated municipal obligations typically provide a higher yield than higher
rated municipal obligations of similar maturity. However, lower rated municipal
obligations are also subject to a greater degree of risk with respect to the
ability of the issuer to meet the principal and interest payments on the
obligations (credit risk) and may also be subject to greater price volatility
due to the market perceptions of the creditworthiness of the issuer. Insurance
policies may be obtained to insure against credit risk, but not against market
risk.
 
  THE HIGH YIELD SERIES
 
  THE HIGH YIELD SERIES WILL INVEST PRIMARILY IN MUNICIPAL OBLIGATIONS WHICH ARE
RATED B OR BETTER BY MOODY'S INVESTORS SERVICE (MOODY'S) OR STANDARD & POOR'S
RATINGS GROUP (S&P) OR A SIMILAR NATIONALLY RECOGNIZED STATISTICAL
 
                                       18
<PAGE>
RATING ORGANIZATION (NRSRO) AND WHICH GENERALLY HAVE MATURITIES IN EXCESS OF TEN
YEARS AT THE TIME OF PURCHASE, ALTHOUGH THE SERIES ALSO WILL INVEST IN MUNICIPAL
OBLIGATIONS HAVING MATURITIES RANGING FROM ONE YEAR TO TEN YEARS, PROVIDED THAT
THE WEIGHTED AVERAGE MATURITY OF THE SERIES' INVESTMENT PORTFOLIO REMAINS WITHIN
THE FIFTEEN TO THIRTY YEAR RANGE. Subsequent to its purchase by the Series, a
municipal obligation may be assigned a lower rating or cease to be rated. Such
an event would not require the elimination of the issue from the portfolio, but
the investment adviser will consider such an event in determining whether the
Series should continue to hold the security in its portfolio. Under normal
circumstances, the High Yield Series may invest up to 35% of the Series' total
assets in municipal obligations rated higher than Baa or BBB by Moody's or S&P,
respectively. From time to time, for temporary defensive purposes, the High
Yield Series may invest more than 35% of its total assets in municipal
obligations rated higher than Baa or BBB by Moody's or S&P, respectively.
Securities rated Baa by Moody's, although considered to be investment grade,
lack outstanding investment characteristics and in fact have speculative
characteristics as well. Securities rated BB or Ba or lower by S&P or Moody's,
respectively, are generally considered to be predominantly speculative with
respect to the issuer's capacity to pay interest and repay principal and are
commonly referred to as "junk bonds." While such securities may have some
quality and protective characteristics, those are outweighed by large
uncertainties or major risk exposures to adverse conditions. See "Description of
Security Ratings" in the Appendix.
 
  THE SERIES MAY ALSO INVEST IN MUNICIPAL SECURITIES WHICH ARE NOT RATED IF,
BASED UPON A CREDIT ANALYSIS BY THE FUND'S INVESTMENT ADVISER, THE INVESTMENT
ADVISER BELIEVES THAT SUCH SECURITIES ARE OF COMPARABLE QUALITY TO RATED
MUNICIPAL SECURITIES IN WHICH THE SERIES MAY INVEST. The High Yield Series
normally can be expected to offer the highest yields of the three Series, but it
will also be subject to the greatest market and credit risk.
 
  From time to time, the Series may own the majority of a municipal obligation.
Such majority-owned holdings may present market and credit risks.
 
  THE SERIES ALSO MAY INVEST IN SHORT-TERM MUNICIPAL OBLIGATIONS (I.E., CASH
EQUIVALENTS) THAT ARE, AT THE TIME OF PURCHASE, RATED WITHIN THE FOUR HIGHEST
QUALITY GRADES AS DETERMINED BY EITHER MOODY'S (CURRENTLY MIG 1, MIG 2, MIG 3
AND MIG 4 FOR NOTES AND P-1, P-2 AND P-3 FOR COMMERCIAL PAPER) OR S&P (CURRENTLY
A-1, A-2 AND A-3 FOR COMMERCIAL PAPER AND SP-1 AND SP-2 FOR NOTES). See "Other
Investments and Policies--General" below.
 
  The Series may also invest up to 10% of its total assets in debt securities of
financially troubled and operationally troubled obligors (distressed
securities). Financially troubled obligors include obligors involved in
bankruptcy or reorganization proceedings or financial restructurings or
otherwise in default on their obligations. Operationally troubled obligors are
ones experiencing poor operating results that may have severely depressed
earnings or have special competitive or product obsolescence problems.
 
  The Series is permitted to invest in defaulted securities and in low quality
debt securities having a rating of D or better as determined by S&P or Moody's
or having a comparable rating determined by another NRSRO, or in unrated
securities which, in the opinion of the investment adviser, are of equivalent
quality. These lower rated securities are "junk bonds." See "Risk Factors
Relating to Investing in High Yield Securities" below and the "Description of
Security Ratings" in the Appendix. Such lower-quality debt securities are
considered to have speculative characteristics, and involve greater risk of
default or price changes due to changes in the obligor's creditworthiness, or
they may already be in default. The market prices of these securities may
fluctuate more than higher-quality securities and may decline significantly in
periods of general or regional economic difficulty.
 
  The Subadviser maintains a fixed income research group which the Series'
portfolio manager may consult in managing the portfolio and in researching
financially troubled and operationally troubled obligors. The Series' portfolio
manager reviews on an ongoing basis financially troubled and operationally
troubled obligors, including prospective purchases and portfolio holdings of the
Series. The portfolio manager has broad access to research and financial
reports, data retrieval services and industry analysts.
 
  RISK FACTORS RELATING TO INVESTING IN HIGH YIELD SECURITIES. FIXED INCOME
SECURITIES ARE SUBJECT TO THE RISK OF AN ISSUER'S INABILITY TO MEET PRINCIPAL
AND INTEREST PAYMENTS ON THE OBLIGATIONS (CREDIT RISK) AND MAY ALSO BE SUBJECT
TO PRICE VOLATILITY DUE TO SUCH FACTORS AS INTEREST RATE SENSITIVITY AND THE
MARKET PERCEPTION OF THE CREDITWORTHINESS OF THE
 
                                       19
<PAGE>
ISSUER (MARKET RISK). Lower rated (I.E., high yield) securities or non-rated
securities of comparable quality are more likely to react to developments
affecting market and credit risk than are more highly rated securities, which
react primarily to movements in the general level of interest rates. The
investment adviser considers both credit risk and market risk in making
investment decisions for the Series. Investors should carefully consider the
relative risks of investing in high yield securities and understand that such
securities are not generally meant for short-term trading.
 
  The amount of high yield securities outstanding has proliferated recently in
conjunction with the decline in creditworthiness of many obligors on municipal
debt, particularly health care providers and certain governmental bodies. An
economic downturn could severely affect the ability of highly leveraged issuers
to service their debt obligations or to repay their obligations upon maturity.
In addition, the secondary market for high yield securities, which is
concentrated in relatively few market makers, may not be as liquid as the
secondary market for more highly rated securities. Under adverse market or
economic conditions, the secondary market for high yield securities could
contract further, independent of any specific adverse changes in the condition
of a particular issuer. As a result, the investment adviser could find it more
difficult to sell these securities or may be able to sell the securities only at
prices lower than if such securities were widely traded. Prices realized upon
the sale of such lower rated or unrated securities, under these circumstances,
may be less than the prices used in calculating the Series' net asset value.
Under circumstances where the Fund owns the majority of an issue, such market
and credit risks may be greater. If the investment adviser becomes involved in
activities such as reorganizations of obligors of troubled investments held by
the Series, this may prevent the Series from disposing of the securities, due to
its possession of material, non-public information concerning the obligor.
 
  Debt rated BB, B, CCC, CC and C by S&P, and debt rated Ba, B, Caa, Ca and C by
Moody's is regarded by the rating agency, on balance, as predominantly
speculative with respect to the issuer's capacity to pay interest and repay
principal in accordance with the terms of the obligation. BB/Ba indicates the
lowest degree of speculation and D/C the highest degree of speculation. While
such debt will likely have some quality and protective characteristics, these
are outweighed by large uncertainties or major risk exposures to adverse
conditions. Debt rated C by S&P is the lowest rated debt that is not in default
as to principal or interest and such issues so rated can be regarded as having
extremely poor prospects of ever attaining any real investment standing. Such
securities are also generally considered to be subject to greater risk than
securities with higher ratings with regard to a deterioration of general
economic conditions. Debt rated D by S&P is in payment default. Moody's does not
have a D rating. See the "Description of Security Ratings" in the Appendix.
 
  Ratings of fixed income securities represent the rating agency's opinion
regarding their credit quality and are not a guarantee of quality. Rating
agencies attempt to evaluate the safety of principal and interest payments and
do not evaluate the risks of fluctuations in market value. Also, rating agencies
may fail to make timely changes in credit ratings in response to subsequent
events, so that an issuer's current financial condition may be better or worse
than a rating indicated.
 
  From time to time proposals have been introduced to limit the use, or tax and
other advantages, of municipal securities which, if enacted, could adversely
affect the Series' net asset value and investment practices. Such proposals
could also adversely affect the secondary market for high yield municipal
securities, the financial condition of issuers of these securities and the value
of outstanding high yield municipal securities. Reevaluation of the Series'
investment objective and structure might be necessary in the future due to
market conditions which may result from future changes in state or federal law.
 
  LOWER RATED OR UNRATED DEBT OBLIGATIONS ALSO PRESENT RISKS BASED ON PAYMENT
EXPECTATIONS. If an issuer calls the obligation for redemption, the Series may
have to replace the security with a lower yielding security, resulting in a
decreased return for investors. If the Series experiences unexpected net
redemptions, it may be forced to sell its higher rated securities, resulting in
a decline in the overall credit quality of the portfolio and increasing the
exposure of the Series to the risks of high yield securities.
 
                                       20
<PAGE>
  During the year ended April 30, 1997, the monthly dollar weighted average
ratings of the debt obligations held by the Series, expressed as a percentage of
the Series' total investments, were as follows:
 
<TABLE>
<CAPTION>
                                       PERCENTAGE OF TOTAL
                      RATINGS              INVESTMENTS
                      ------------     -------------------
                      <S>              <C>
                      AAA/Aaa                 23.72%
                      AA/Aa                    5.35%
                      A/A                      1.03%
                      BBB/Baa                  9.60%
                      BB/Ba                    4.21%
                      B/B                      2.64%
                      CCC/Caa                   0.0%
                      Unrated
                        AAA/Aaa                3.78%
                        AA/Aa                   0.0%
                        A/A                    0.31%
                        BBB/Baa                3.12%
                        BB/Ba                 14.67%
                        B/B                   27.88%
                        CCC/Caa                1.21%
                        D                      2.47%
</TABLE>
 
  THE INSURED SERIES
 
  THE INSURED SERIES WILL INVEST PRIMARILY IN MUNICIPAL OBLIGATIONS WHICH ARE
(i) INSURED BY AN ENTITY WHOSE CLAIMS-PAYING ABILITY AT THE TIME OF PURCHASE IS
RATED AAA BY MOODY'S OR AAA BY S&P, OR A SIMILAR NRSRO, SO THAT THE OBLIGATION
IS RATED AAA OR AAA OR MEETS THE ELIGIBILITY CRITERIA IMPOSED BY SUCH INSURERS,
(ii) RATED AAA OR AAA BY MOODY'S OR S&P, RESPECTIVELY, OR A SIMILAR NRSRO (OR,
IN THE CASE OF NOTES OR VARIABLE RATE SECURITIES, A-1, P-1, MIG 1 OR SP-1),
BASED ON THE CREDIT OF THE ISSUER OR (iii) BACKED BY THE FULL FAITH AND CREDIT
OF THE U.S. GOVERNMENT. The Series may also invest up to 5% of its total assets
in municipal obligations which are rated A/A or Aa/AA by Moody's or S&P,
respectively, or a similar NRSRO. See "Description of Security Ratings" in the
Appendix. The Series may also invest in municipal securities which are not rated
if, based upon a credit analysis by the Fund's investment adviser, the
investment adviser believes that such securities are of comparable quality to
other municipal securities that the Series may purchase.
 
  UNDER NORMAL CONDITIONS, AT LEAST 70% OF THE SERIES' TOTAL ASSETS WILL CONSIST
OF INSURED OBLIGATIONS. AS OF APRIL 30, 1997, APPROXIMATELY 93% OF THE SERIES'
TOTAL ASSETS WERE OBLIGATIONS INSURED BY A MUNICIPAL BOND INSURER. This
insurance may be provided either (i) under a "new issue" insurance policy
obtained by the issuer or underwriter of a bond or note or (ii) under a
"secondary market" insurance policy on a particular bond or note purchased
either by the Series or a previous bondholder or noteholder. See "Insurance"
below. As noted above, the Series will acquire insurance only from, and purchase
municipal bonds and notes insured by, insurers whose claims-paying ability is
rated AAA or Aaa at the time of purchase. Changes in the financial condition of
an insurer could result in a subsequent reduction or withdrawal of this rating.
In each case, the insurance policies protect only against the timely payment of
principal and interest on the insured municipal bonds and notes. The price of
the municipal obligations, which may fluctuate due to changes in interest rates
generally or factors affecting the credit of the insurer, and the stability of
the Series' net asset value are not insured.
 
                                       21
<PAGE>
  INSURANCE. The Series may at times purchase secondary market insurance on
municipal bonds and notes which it holds or acquires. Secondary market insurance
would be reflected in the market value of the municipal obligation and may
enable the Series to dispose of a defaulted obligation at a price similar to
that of comparable municipal obligations which are not in default.
 
  Insurance is not a substitute for the basic credit of an issuer, but
supplements the existing credit and provides additional security therefor. While
insurance coverage for the municipal bonds and notes held by the Insured Series
reduces credit risk by providing that the insurance company will make timely
payment of principal and interest if the issuer defaults on its obligation to
make such payment, it does not afford protection against fluctuation in the
price, I.E., the market value, of the municipal obligations caused by changes in
interest rates and other factors, nor in turn against fluctuations in the net
asset value of the shares of the Insured Series.
 
  The ratings of insured municipal obligations depend, in substantial part, on
the creditworthiness of the insurer; thus their value will fluctuate largely on
the basis of factors relating to the insurer's ability to satisfy its
obligations, as well as on market factors generally. It is anticipated that,
under current market conditions, a great majority of the municipal obligations
held by the Insured Series will be insured by the following entities, among
others: MBIA Insurance Corporation, AMBAC Indemnity Corporation, Financial
Guaranty Insurance Company and Financial Security Assurance Inc. S&P rates
securities insured by all of these companies AAA. Moody's rates securities
insured by all of these companies Aaa. The Insured Series may, from time to
time, purchase municipal securities insured by other entities or acquire
insurance coverage for individual uninsured municipal securities directly from
another insurer provided any such entity has a claims-paying ability rated AAA
or Aaa by S&P or Moody's, respectively. See "Investment Objectives and
Policies--The Insured Series" in the Statement of Additional Information for
additional information concerning the insurers.
 
  New issue insurance is obtained by the issuer or underwriter upon issuance of
a bond or note, and the insurance premiums are reflected in the price of such
bond or note. Insurance premiums with respect to secondary insurance may, on the
other hand, be paid by the Series. Premiums paid for secondary market insurance
will be treated as capital costs, increasing the cost basis of the investment
and thereby reducing the effective yield of the investment.
 
  THE INTERMEDIATE SERIES
 
  THE INTERMEDIATE SERIES WILL INVEST PRIMARILY IN MUNICIPAL OBLIGATIONS WITH
MATURITIES BETWEEN 3 AND 15 YEARS AND WILL HAVE A DOLLAR-WEIGHTED AVERAGE
PORTFOLIO MATURITY OF MORE THAN 3 AND LESS THAN 10 YEARS. ALL OF THE MUNICIPAL
OBLIGATIONS HELD BY THE INTERMEDIATE SERIES WILL BE RATED AT LEAST BAA BY
MOODY'S OR BBB BY S&P OR A SIMILAR NRSRO AT THE TIME OF PURCHASE OR BE NON-RATED
OBLIGATIONS OF COMPARABLE QUALITY IN THE OPINION OF THE FUND'S INVESTMENT
ADVISER. Subsequent to its purchase by the Series, a municipal obligation may be
assigned a lower rating or cease to be rated. Such an event would not require
the elimination of the issue from the portfolio, but the investment adviser will
consider such an event in determining whether the Series should continue to hold
the security in its portfolio. Under normal circumstances, at least 60% of the
municipal obligations purchased by the Series will be rated A or better by
Moody's or S&P or a similar NRSRO. See "Description of Security Ratings" in the
Appendix.
 
  For purposes of determining the dollar-weighted average portfolio maturity of
the Series' portfolio, the maturity of a municipal security will be its ultimate
maturity, unless it is probable that the issuer of the security will take
advantage of maturity-shortening devices such as a call, refunding or redemption
provision, in which case the maturity date will be the date on which it is
probable that the security will be called, refunded or redeemed. If the
municipal security includes the right to demand payment, the maturity of the
security for purposes of determining the Series' dollar-weighted average
portfolio maturity will be the period remaining until the principal amount of
the security can be recovered by exercising the right to demand payment.
 
  GENERALLY, THE YIELD EARNED ON LONGER-TERM MUNICIPAL OBLIGATIONS IS GREATER
THAN THAT EARNED ON SIMILAR OBLIGATIONS WITH SHORTER MATURITIES. HOWEVER,
OBLIGATIONS WITH LONGER MATURITIES ARE SUBJECT TO GREATER MARKET RISK. Given a
specific
 
                                       22
<PAGE>
change in the level of interest rates, the value of longer-term obligations will
fluctuate relatively more than the value of shorter-term obligations. For
example, 30-year municipal obligations typically yield 60-90 basis points
(.60%-.90%) more than 10-year obligations and have 60-70% more price volatility
(market risk) than 10-year obligations.
 
  THE INTERMEDIATE SERIES INTENDS TO INVEST IN LONGER-TERM, HIGHER YIELDING
OBLIGATIONS AND REDUCE THE GREATER MARKET RISK OF SUCH OBLIGATIONS THROUGH THE
USE OF FINANCIAL FUTURES CONTRACTS. SPECIFICALLY, THE SERIES WILL INVEST IN
MUNICIPAL OBLIGATIONS WITH MATURITIES OF BETWEEN 5 AND 30 YEARS AND
SIMULTANEOUSLY HEDGE THE PRICE VOLATILITY OF SUCH OBLIGATIONS THROUGH THE SALE
OF FUTURES CONTRACTS. RATHER THAN HEDGING THE MUNICIPAL OBLIGATION ENTIRELY, THE
SERIES WILL SELL FUTURES CONTRACTS IN SUFFICIENT AMOUNTS SO THAT THE
DOLLAR-WEIGHTED AVERAGE MATURITY OF THE COMBINED MUNICIPAL OBLIGATION/FUTURES
POSITION WILL BE MORE THAN 3 AND LESS THAN 10 YEARS. IN THIS MANNER, THE
INVESTMENT ADVISER WILL CREATE A "SYNTHETIC OBLIGATION" THROUGH THE CONSTRUCTION
OF A PARTIALLY HEDGED LONGER-TERM OBLIGATION POSITION.
 
  The Fund's investment adviser intends to create such synthetic obligation
positions when, in its opinion, the Series will realize one or more of the
following benefits compared to buying municipal obligations with shorter
maturities: (a) greater market liquidity; (b) lower transaction costs; (c)
greater expected capital appreciation or enhanced preservation of capital; or
(d) higher yields.
 
  In the municipal securities market, most new issues are structured with many
serial maturities that are relatively small in principal amount and one or
several longer-term maturities that are relatively large in principal amount.
Therefore, long-term municipal obligations typically have greater liquidity and
the associated transaction costs are relatively less than obligations with
maturities of 3 to 15 years.
 
  It is expected that synthetic obligation positions will often provide greater
returns than actual intermediate maturity municipal obligations. This can occur
when interest rate futures contracts are relatively overpriced in relation to
the current prices of municipal obligations, so that the sale of the futures
contracts, as part of a synthetic position, would be advantageous to the Series.
Synthetic positions can also be more attractive to the Series when the
investment adviser expects yields on longer-term municipal obligations to
decrease more (or increase less) than yields on medium-term municipal
obligations. If such expectations are correct, the net capital appreciation of
the synthetic obligation position should exceed (or the price decline be less
than) that of an actual intermediate-term municipal obligation.
 
  THERE IS NO ASSURANCE THAT THE SYNTHETIC OBLIGATION POSITION WILL TRADE LIKE
AN INTERMEDIATE-TERM MUNICIPAL OBLIGATION. ANY USE OF FUTURES CONTRACTS INVOLVES
THE RISK OF IMPERFECT CORRELATION IN MOVEMENTS IN THE PRICE OF THE FUTURES
CONTRACTS AND MOVEMENTS IN THE PRICE OF THE SECURITY BEING HEDGED. FURTHERMORE,
THE SERIES' ABILITY TO CREATE SYNTHETIC OBLIGATIONS IS SUBJECT TO VARIOUS OTHER
LIMITATIONS. See "Hedging Strategies--Futures Contracts and Options Thereon"
below.
 
  THE SERIES ALSO MAY USE FUTURES CONTRACTS TO HEDGE AGAINST OVERALL MARKET RISK
OF THE ENTIRE PORTFOLIO, as described under "Hedging Strategies--Futures
Contracts and Options Thereon" below.
 
  BORROWING
 
  Each Series may borrow an amount equal to no more than 33 1/3% of the value of
its total assets (computed at the time the loan is made) for temporary,
extraordinary or emergency purposes and to take advantage of investment
opportunities or for the clearance of transactions. Each Series may pledge up to
33 1/3% of the value of its total assets to secure these borrowings. If a
Series' asset coverage for borrowings falls below 300%, the Fund will take
prompt action to reduce its borrowings. If a Series borrows to invest in
securities, any investment gains made on the securities in excess of interest
paid on the borrowing will cause the net asset value of the shares to rise
faster than would otherwise be the case. On the other hand, if the investment
performance of the additional securities purchased fails to cover their cost
(including any interest paid on the money borrowed) to the Series, the net asset
value of the Series' shares will decrease faster than would otherwise be the
case. This is the speculative factor known
 
                                       23
<PAGE>
as "leverage." Money borrowed for leveraging will be subject to interest costs
which may or may not be recovered by appreciation of the securities purchased
and may exceed the income from the securities purchased. In addition, the Fund
may be required to maintain minimum average balances in connection with such
borrowing or pay a commitment fee to maintain a line of credit which would
increase the cost of borrowing over the stated interest rate.
 
HEDGING STRATEGIES
 
FUTURES CONTRACTS AND OPTIONS THEREON
 
  EACH SERIES IS AUTHORIZED TO PURCHASE AND SELL CERTAIN DERIVATIVES, INCLUDING
FINANCIAL FUTURES CONTRACTS (FUTURES CONTRACTS) AND OPTIONS THEREON FOR THE
PURPOSE OF ATTEMPTING TO HEDGE ITS INVESTMENT IN MUNICIPAL OBLIGATIONS AGAINST
FLUCTUATIONS IN VALUE CAUSED BY CHANGES IN PREVAILING MARKET INTEREST RATES AND
ATTEMPTING TO HEDGE AGAINST INCREASES IN THE COST OF SECURITIES THE SERIES
INTENDS TO PURCHASE. A SERIES, AND THUS AN INVESTOR, MAY LOSE MONEY THROUGH
UNSUCCESSFUL USE OF THESE STRATEGIES. In that regard, the Intermediate Series
may sell futures contracts to create "synthetic positions" by partially hedging
longer-term obligation positions. See "Investment Objectives and Policies--The
Intermediate Series" above. The successful use of futures contracts and options
thereon by a Series involves additional transaction costs, is subject to various
risks and depends upon the investment adviser's ability to predict the direction
of the market and interest rates.
 
  A FUTURES CONTRACT OBLIGATES THE SELLER OF A CONTRACT TO DELIVER TO THE
PURCHASER OF A CONTRACT CASH EQUAL TO A SPECIFIC DOLLAR AMOUNT TIMES THE
DIFFERENCE BETWEEN THE VALUE OF A SPECIFIC FIXED-INCOME SECURITY OR INDEX AT THE
CLOSE OF THE LAST TRADING DAY OF THE CONTRACT AND THE PRICE AT WHICH THE
AGREEMENT IS MADE. No physical delivery of the underlying securities is made. A
Series will engage in transactions in only those futures contracts and options
thereon that are traded on a commodities exchange or a board of trade.
 
  EACH SERIES INTENDS TO ENGAGE IN FUTURES CONTRACTS AND OPTIONS THEREON AS A
HEDGE AGAINST CHANGES, RESULTING FROM MARKET CONDITIONS, IN THE VALUE OF
SECURITIES WHICH ARE HELD IN THE SERIES' PORTFOLIO OR WHICH THE SERIES INTENDS
TO PURCHASE, IN ACCORDANCE WITH THE RULES AND REGULATIONS OF THE COMMODITY
FUTURES TRADING COMMISSION (THE CFTC). The Series also intend to engage in such
transactions when they are economically appropriate for the reduction of risks
inherent in the ongoing management of the Series. A Series may purchase and sell
futures contracts and options thereon for bona fide hedging transactions, except
that a Series may purchase and sell futures contracts and options thereon for
any other purpose to the extent that the aggregate initial margin and option
premiums do not exceed 5% of the liquidation value of the Fund's total assets.
In addition, a Series may not purchase or sell futures contracts or purchase
options thereon if, immediately thereafter, the sum of initial and net
cumulative variation margin on outstanding futures contracts, together with
premiums paid on options thereon, would exceed 20% of the total assets of the
Series. There are no limitations on the percentage of a portfolio which may be
hedged and no limitations on the use of a Series' assets to cover futures
contracts and options thereon, except that the aggregate value of the
obligations underlying put options will not exceed 50% of a Series' assets.
 
  Currently, futures contracts are available on several types of fixed-income
securities, including U.S. Treasury Bonds and Notes, Government National
Mortgage Association modified pass-through mortgage-backed securities,
three-month U.S. Treasury Bills and bank certificates of deposit. Futures
contracts are also available on a municipal bond index, based on THE BOND BUYER
Municipal Bond Index, an index of 40 actively traded municipal bonds. Each
Series may also engage in transactions in other futures contracts that become
available, from time to time, in other fixed-income securities or municipal bond
indices and in other options on such contracts if the investment adviser
believes such contracts and options would be appropriate for hedging investments
in municipal obligations.
 
  THERE CAN BE NO ASSURANCE THAT VIABLE MARKETS WILL CONTINUE OR THAT A LIQUID
SECONDARY MARKET WILL EXIST TO TERMINATE ANY PARTICULAR FUTURES CONTRACT AT ANY
SPECIFIC TIME. If it is not possible to close a futures position entered into by
 
                                       24
<PAGE>
a Series, the Series will continue to be required to make daily cash payments of
variation margin in the event of adverse price movements. In such a situation,
if the Series had insufficient cash, it might have to sell portfolio securities
to meet daily variation margin requirements at a time when it might be
disadvantageous to do so. The inability to close futures positions also could
have an adverse impact on the ability of a Series to hedge effectively. There is
also a risk of loss by a Series of margin deposits in the event of bankruptcy of
a broker with whom the Series has an open position in a futures contract.
 
  THE SUCCESSFUL USE OF FUTURES CONTRACTS AND OPTIONS THEREON BY A SERIES IS
SUBJECT TO VARIOUS ADDITIONAL RISKS. Any use of futures transactions involves
the risk of imperfect correlation in movements in the price of futures contracts
and movements in interest rates and, in turn, the prices of the securities that
are the subject of the hedge. If the price of the futures contract moves more or
less than the price of the security that is the subject of the hedge, the Series
will experience a gain or loss that will not be completely offset by movements
in the price of the security. The risk of imperfect correlation is greater where
the securities underlying futures contracts are taxable securities (rather than
municipal securities), are issued by companies in different market sectors or
have different maturities, ratings or geographic mixes than the security being
hedged. In addition, the correlation may be affected by additions to or
deletions from the index which serves as the basis for a futures contract.
Finally, if the price of the security that is subject to the hedge were to move
in a favorable direction, the advantage to the Series would be partially offset
by the loss incurred on the futures contract.
 
  THE FUND'S ABILITY TO ENTER INTO AND CLOSE OUT FUTURES CONTRACTS AND OPTIONS
THEREON IS LIMITED BY THE REQUIREMENTS OF THE INTERNAL REVENUE CODE OF 1986, AS
AMENDED (THE INTERNAL REVENUE CODE), FOR QUALIFICATION AS A REGULATED INVESTMENT
COMPANY. See "Taxes, Dividends and Distributions" in the Statement of Additional
Information.
 
  RISKS OF HEDGING STRATEGIES
 
  PARTICIPATION IN THE OPTIONS OR FUTURES MARKETS INVOLVES INVESTMENT RISKS AND
TRANSACTION COSTS TO WHICH A SERIES WOULD NOT BE SUBJECT ABSENT THE USE OF THESE
STRATEGIES. A SERIES, AND THUS AN INVESTOR, MAY LOSE MONEY THROUGH UNSUCCESSFUL
USE OF THESE STRATEGIES. If the investment adviser's prediction of movements in
the direction of the securities and interest rate markets is inaccurate, the
adverse consequences to the Fund may leave the Fund in a worse position than if
such strategies were not used. Risks inherent in the use of futures contracts
and options thereon include (1) dependence on the investment adviser's ability
to predict correctly movements in the direction of interest rates and securities
prices or the movement in indicies; (2) imperfect correlation between the price
of futures contracts and options thereon and movements in the prices of the
securities being hedged; (3) the fact that skills needed to use these strategies
are different from those needed to select portfolio securities; (4) the possible
absence of a liquid secondary market for any particular instrument at any time;
(5) the possible need to defer closing out certain hedged positions to avoid
adverse tax consequences; and (6) the possible inability of the Fund to purchase
or sell a portfolio security at a time that otherwise would be favorable for it
to do so, or the possible need for the Fund to sell a portfolio security at a
disadvantageous time, due to the need for the Fund to maintain "cover" or to
segregate securities in connection with hedging transactions. See "Investment
Objectives and Policies" and "Taxes, Dividends and Distributions" in the
Statement of Additional Information.
 
OTHER INVESTMENTS AND POLICIES
 
GENERAL
 
  MUNICIPAL SECURITIES INCLUDE BONDS AND NOTES ISSUED BY OR ON BEHALF OF STATES,
TERRITORIES AND POSSESSIONS OF THE UNITED STATES AND THEIR POLITICAL
SUBDIVISIONS, AGENCIES AND INSTRUMENTALITIES, THE INTEREST ON WHICH IS GENERALLY
ELIGIBLE FOR EXCLUSION FROM FEDERAL INCOME TAX. MUNICIPAL BONDS ARE TYPICALLY
ISSUED TO OBTAIN FUNDS FOR VARIOUS PUBLIC
 
                                       25
<PAGE>
PURPOSES, INCLUDING THE CONSTRUCTION OF A WIDE RANGE OF PUBLIC FACILITIES SUCH
AS AIRPORTS, BRIDGES, HIGHWAYS, HOUSING, HOSPITALS, MASS TRANSPORTATION,
SCHOOLS, STREETS, WATER AND SEWER WORKS AND GAS AND ELECTRIC UTILITIES.
MUNICIPAL NOTES GENERALLY ARE USED TO FINANCE SHORT-TERM CAPITAL NEEDS AND
TYPICALLY HAVE MATURITIES OF ONE YEAR OR LESS.
 
  EACH SERIES MAY INVEST MORE THAN 5% OF ITS NET ASSETS IN FLOATING RATE AND
VARIABLE RATE SECURITIES, INCLUDING PARTICIPATION INTERESTS THEREIN. Floating
and variable rate securities normally have a rate of interest which is set as a
specific percentage of a designated base rate, such as the rate on Treasury
Bonds or Bills or the prime rate at a major commercial bank. These securities
also allow the holder to demand payment of the obligation on short notice at par
plus accrued interest, which amount may be more or less than the amount the
Series paid for them. Variable rate securities provide for a specified periodic
adjustment in the interest rate. The interest rate on floating rate securities
changes whenever there is a change in the designated base interest rate.
 
  Each Series may also invest in inverse floaters. An inverse floater is a debt
instrument with a floating or variable interest rate that moves in the opposite
direction of the interest rate on another security or the value of an index.
Changes in the interest rate on the other security or index inversely affect the
residual interest rate paid on the inverse floater, with the result that the
inverse floater's price will be considerably more volatile than that of a fixed
rate bond. The market for inverse floaters is relatively new.
 
  Each Series may purchase a rating from an NRSRO for non-rated securities. The
purchase of a rating is expected to enhance the value of the security for which
the rating is purchased. The cost of purchasing a rating is an expense of the
Series.
 
  DURING NORMAL MARKET CONDITIONS, THE ASSETS OF EACH SERIES WILL BE INVESTED SO
THAT IT WILL HAVE AT LEAST 80% OF ITS NET ASSETS INVESTED IN MUNICIPAL
OBLIGATIONS. However, when the Fund's investment adviser believes that market
conditions warrant a temporary defensive investment posture or when necessary to
meet large redemptions, a Series may hold more than 20% of its net assets in
cash, cash equivalents or investment grade taxable obligations, including
obligations that are generally exempt from state, but not federal, taxation.
Each Series may invest in municipal cash equivalents, such as floating rate
demand notes, municipal commercial paper and general obligation and revenue
notes, or in taxable cash equivalents, such as certificates of deposit, bankers'
acceptances and time deposits or other short-term taxable investments, such as
repurchase agreements. Each Series will treat an investment in a municipal bond
refunded with escrowed U.S. Government securities as U.S. Government securities
for purposes of the Investment Company Act's diversification requirements
provided certain conditions are met.
 
  WHEN-ISSUED AND DELAYED DELIVERY SECURITIES
 
  Each Series may purchase municipal obligations on a "when-issued" or "delayed
delivery" basis and may from time to time sell obligations on a delayed delivery
basis, in each case without limit. When municipal obligations are offered on a
when-issued or delayed delivery basis, the price and coupon rate are fixed at
the time the commitment to purchase is made, but delivery and payment for the
when-issued securities take place at a later date. Normally, the settlement date
occurs within one month of purchase. During the period between purchase and
settlement, no interest accrues to the purchaser. In the case of purchases by a
Series, the price that the Series is required to pay on the settlement date may
be in excess of the market value of the municipal obligations on that date.
While securities may be sold prior to the settlement date, each Series intends
to purchase these securities with the purpose of actually acquiring them unless
a sale would be desirable for investment reasons. At the time a Series makes the
commitment to purchase a municipal obligation on a when-issued basis, it will
record the transaction and reflect the value of the obligation, each day, in
determining its net asset value. This value may fluctuate from day to day in the
same manner as values of municipal obligations otherwise held by the Series. If
the seller defaults in the sale, the Series could fail to realize the
appreciation, if any, that had occurred. Each Series will establish a segregated
account with its Custodian in which it will maintain cash, U.S. Government
securities, equity securities or other liquid, unencumbered assets,
marked-to-market daily, having a value equal to or greater than the Series'
purchase commitments.
 
                                       26
<PAGE>
  As in the case of purchases, the price of the municipal obligations sold on a
delayed delivery basis is determined at the time of the commitment. The price
that a Series may be required to accept on the settlement date may be less than
the market value of the obligation on that date.
 
  Each Series may also purchase municipal forward contracts. A municipal forward
contract is a municipal security which is purchased on a when-issued basis with
delivery taking place up to five years from the date of purchase. The investment
adviser will monitor the liquidity, value, credit quality and delivery of the
security under the supervision of the Trustees.
 
  MUNICIPAL LEASE OBLIGATIONS
 
  Each Series may invest in municipal lease obligations. A municipal lease
obligation is a municipal security the interest on and principal of which is
payable out of lease payments made by the party leasing the facilities financed
by the issue. Typically, municipal lease obligations are issued by a state or
municipal financing authority to provide funds for the construction of
facilities (E.G., schools, dormitories, office buildings or prisons) or the
acquisition of equipment. The facilities are typically used by the state or
municipality pursuant to a lease with a financing authority. Certain municipal
lease obligations may trade infrequently. Accordingly, the investment adviser
will monitor the liquidity of municipal lease obligations under the supervision
of the Trustees. See "Illiquid Securities" below.
 
  LIQUIDITY PUTS
 
  Each Series may purchase and exercise puts on municipal bonds and notes
without limit. Puts give the Series the right to sell the securities at a
specified exercise price on a specified date. Puts may be acquired to reduce the
volatility of the market value of the securities subject to the puts, but the
acquisition of the puts may involve an additional cost to the Series. See
"Investment Objectives and Policies" in the Statement of Additional Information.
 
  REPURCHASE AGREEMENTS
 
  Each Series may on occasion enter into repurchase agreements, whereby the
seller of a security agrees to repurchase that security from the Series at a
mutually agreed-upon time and price. The period of maturity is usually quite
short, possibly overnight or a few days, although it may extend over a number of
months. The resale price is in excess of the purchase price, reflecting an
agreed-upon rate of return effective for the period of time the Series' money is
invested in the security. The Series' repurchase agreements will at all times be
fully collateralized in an amount at least equal to the resale price. The
instruments held as collateral are valued daily, and if the value of the
instruments declines, the Series will require additional collateral. If the
seller defaults and the value of the collateral securing the repurchase
agreement declines, the Series may incur a loss. Each Series participates in a
joint repurchase account with other investment companies managed by PIFM
pursuant to an order of the Securities and Exchange Commission (SEC).
 
  ILLIQUID SECURITIES
 
  Each Series may hold up to 15% of its net assets in illiquid securities,
including repurchase agreements which have a maturity of longer than seven days,
securities with legal or contractual restrictions on resale (restricted
securities) and securities that are not readily marketable. Securities,
including municipal lease obligations, that have a readily available market are
not considered illiquid for purposes of this limitation. The investment adviser
will monitor the liquidity of such restricted securities under the supervision
of the Trustees. A Series' investment in Rule 144A securities could have the
effect of increasing illiquidity to the extent that qualified institutional
buyers become, for a limited time, uninterested in purchasing Rule 144A
securities. See "Investment Restrictions" in the Statement of Additional
Information. Repurchase agreements subject to demand are deemed to have a
maturity equal to the applicable notice period.
 
                                       27
<PAGE>
  Municipal lease obligations will not be considered illiquid for purposes of
the each Series' 15% limitation on illiquid securities provided the investment
adviser determines that there is a readily available market for such securities.
In reaching liquidity decisions, the investment adviser will consider, INTER
ALIA, the following factors: (1) the frequency of trades and quotes for the
security; (2) the number of dealers wishing to purchase or sell the security and
the number of other potential purchasers; (3) dealer undertakings to make a
market in the security; and (4) the nature of the security and the nature of the
marketplace trades (E.G., the time needed to dispose of the security, the method
of soliciting offers and the mechanics of the transfer). With respect to
municipal lease obligations, the investment adviser also considers: (1) the
willingness of the municipality to continue, annually or biannually, to
appropriate funds for payment of the lease; (2) the general credit quality of
the municipality and the essentiality to the municipality of the property
covered by the lease; (3) in the case of unrated municipal lease obligations, an
analysis of factors similar to that performed by nationally recognized
statistical rating organizations in evaluating the credit quality of a municipal
lease obligation, including (i) whether the lease can be cancelled; (ii) if
applicable, what assurance there is that the assets represented by the lease can
be sold; (iii) the strength of the lessee's general credit (E.G., its debt,
administrative, economic and financial characteristics); (iv) the likelihood
that the municipality will discontinue appropriating funding for the leased
property because the property is no longer deemed essential to the operations of
the municipality (E.G., the potential for an event of nonappropriation); (v) the
legal recourse in the event of failure to appropriate; and (4) any other factors
unique to municipal lease obligations as determined by the investment adviser.
 
  SECURITIES LENDING
 
  The Fund is permitted to lend its portfolio securities. See "Investment
Objectives and Policies--Municipal Securities-- Lending of Securities" in the
Statement of Additional Information.
 
  PORTFOLIO TURNOVER
 
  The Series do not expect to trade in securities for short-term gain. It is
anticipated that the annual portfolio turnover rate will not exceed 150%. The
portfolio turnover rate is calculated by dividing the lesser of sales or
purchases of portfolio securities by the average monthly value of a Series'
portfolio securities, excluding securities having a maturity at the date of
purchase of one year or less.
 
INVESTMENT RESTRICTIONS
 
  Each Series is subject to certain investment restrictions which, like its
investment objective, constitute fundamental policies. Fundamental policies
cannot be changed without the approval of the holders of a majority of each
Series' outstanding voting securities, as defined in the Investment Company Act.
See "Investment Restrictions" in the Statement of Additional Information.
 
                            HOW THE FUND IS MANAGED
 
  THE FUND HAS TRUSTEES WHO, IN ADDITION TO OVERSEEING THE ACTIONS OF THE FUND'S
MANAGER, SUBADVISER AND DISTRIBUTOR, AS SET FORTH BELOW, DECIDE UPON MATTERS OF
GENERAL POLICY. THE FUND'S MANAGER CONDUCTS AND SUPERVISES THE DAILY BUSINESS
OPERATIONS OF THE FUND. THE FUND'S SUBADVISER FURNISHES DAILY INVESTMENT
ADVISORY SERVICES.
 
  For the fiscal year ended April 30, 1997, the total expenses as a percentage
of average net assets were .64%, 1.04%, 1.29% and .54% of the Class A, Class B,
Class C and Class Z shares, respectively, of the High Yield Series, .68%, 1.08%,
1.33% and .58% of the Class A, Class B, Class C and Class Z shares,
respectively, of the Insured Series, and 1.15%, 1.55%, 1.80% and 1.05% of the
Class A, Class B, Class C and Class Z shares, respectively, of the Intermediate
Series. See "Financial Highlights."
 
                                       28
<PAGE>
MANAGER
 
  PRUDENTIAL INVESTMENTS FUND MANAGEMENT LLC (PIFM OR THE MANAGER), GATEWAY
CENTER THREE, 100 MULBERRY STREET, NEWARK, NEW JERSEY 07102-4077, IS THE MANAGER
OF THE FUND AND IS COMPENSATED FOR ITS SERVICES AT AN ANNUAL RATE OF .50 OF 1%
OF THE AVERAGE DAILY NET ASSETS OF EACH SERIES UP TO $1 BILLION AND .45 OF 1% OF
THE AVERAGE DAILY NET ASSETS OF EACH SERIES IN EXCESS OF $1 BILLION. PIFM, which
changed its name from Prudential Mutual Fund Management LLC, effective May 1,
1997, is organized as a New York limited liability company. It is the successor
to Prudential Mutual Fund Management, Inc., which transferred its assets to PIFM
in September 1996. For the fiscal year ended April 30, 1997, PIFM received a
management fee of .45%, .45% and .45% of average daily net assets on behalf of
the High Yield Series, Insured Series and Intermediate Series, respectively. See
"Manager" in the Statement of Additional Information.
 
  PIFM may from time to time waive its management fee and subsidize operating
expenses of a Series. PIFM has agreed to waive 10% of its management fee of .50%
of average daily net assets (.05 of 1% of average net assets, as annualized).
See "Fund Expenses." The Fund is not required to reimburse PIFM for such fee
waiver. Fee waivers and expense subsidies will increase a Series' yield and
total return. See "How the Fund Calculates Performance."
 
  As of May 31, 1997, PIFM served as the manager to 40 open-end investment
companies, constituting all of the Prudential Mutual Funds, and as manager or
administrator to 22 closed-end investment companies with aggregate assets of
approximately $56 billion.
 
  UNDER THE MANAGEMENT AGREEMENT WITH THE FUND, PIFM MANAGES THE INVESTMENT
OPERATIONS OF EACH SERIES OF THE FUND AND ALSO ADMINISTERS THE FUND'S BUSINESS
AFFAIRS. See "Manager" in the Statement of Additional Information.
 
  UNDER A SUBADVISORY AGREEMENT BETWEEN PIFM AND THE PRUDENTIAL INVESTMENT
CORPORATION (PIC), DOING BUSINESS AS PRUDENTIAL INVESTMENTS (PI, THE SUBADVISER
OR THE INVESTMENT ADVISER), PI FURNISHES INVESTMENT ADVISORY SERVICES IN
CONNECTION WITH THE MANAGEMENT OF THE FUND AND IS REIMBURSED BY PIFM FOR ITS
REASONABLE COSTS AND EXPENSES INCURRED IN PROVIDING SUCH SERVICES. Under the
Management Agreement, PIFM continues to have responsibility for all investment
advisory services pursuant to the Management Agreement and supervises PI's
performance of such services.
 
  The current portfolio manager of the High Yield Series is Peter J. Allegrini,
a Managing Director of Prudential Investments, a business group of PIC. Mr.
Allegrini has managed the Series' portfolio since July 1994. From 1982 to 1986,
he was employed by Fidelity Investments as a senior bond analyst and, from 1986
to 1994, he was a portfolio manager, most recently of Fidelity Advisor High
Income Municipal Fund. Mr. Allegrini has responsibility for the day-to-day
management of the Series' portfolio. The current portfolio managers of the
Insured Series are Peter J. Allegrini and Marie Conti, who share responsibility
for the day-to-day management of the Series' portfolio. They have managed the
Series' portfolio since March 1996. Ms. Conti, a Vice President of PIFM, also
has responsibility for the day-to-day management of the Intermediate Series'
portfolio. Ms. Conti has managed the Series' portfolio since 1990 and has been
employed by PIC as a portfolio manager since September 1989 and prior thereto
was employed in an administrative capacity at PIC since August 1988.
 
  PIFM and PIC are indirect wholly-owned subsidiaries of The Prudential
Insurance Company of America (Prudential), a major diversified insurance and
financial services company.
 
DISTRIBUTOR
 
  PRUDENTIAL SECURITIES INCORPORATED (PRUDENTIAL SECURITIES, PSI OR THE
DISTRIBUTOR), ONE SEAPORT PLAZA, NEW YORK, NEW YORK 10292, IS A CORPORATION
ORGANIZED UNDER THE LAWS OF THE STATE OF DELAWARE AND SERVES AS THE DISTRIBUTOR
OF THE SHARES OF EACH SERIES OF THE FUND. IT IS AN INDIRECT, WHOLLY-OWNED
SUBSIDIARY OF PRUDENTIAL.
 
  UNDER SEPARATE DISTRIBUTION AND SERVICE PLANS (THE CLASS A PLAN, THE CLASS B
PLAN AND THE CLASS C PLAN, COLLECTIVELY, THE PLANS) ADOPTED BY THE FUND UNDER
RULE 12B-1 UNDER THE INVESTMENT COMPANY ACT AND A DISTRIBUTION
 
                                       29
<PAGE>
AGREEMENT (THE DISTRIBUTION AGREEMENT), PRUDENTIAL SECURITIES INCURS THE
EXPENSES OF DISTRIBUTING THE CLASS A, CLASS B AND CLASS C SHARES. Prudential
Securities incurs the expenses of distributing the Fund's Class Z shares under
the Distribution Agreement, none of which is reimbursed by or paid for by the
Fund. These expenses include commissions and account servicing fees paid to, or
on account of, financial advisers of Prudential Securities and representatives
of Pruco Securities Corporation (Prusec), an affiliated broker-dealer,
commissions and account servicing fees paid to, or on account of, other broker-
dealers or financial institutions (other than national banks) which have entered
into agreements with the Distributor, advertising expenses, the cost of printing
and mailing prospectuses to potential investors and indirect and overhead costs
of Prudential Securities and Prusec associated with the sale of Fund shares,
including lease, utility, communications and sales promotion expenses.
 
  Under the Plans, the Fund is obligated to pay distribution and/or service fees
to the Distributor as compensation for its distribution and service activities,
not as reimbursement for specific expenses incurred. If the Distributor's
expenses exceed its distribution and service fees, the Fund will not be
obligated to pay any additional expenses. If the Distributor's expenses are less
than such distribution and service fees, it will retain its full fees and
realize a profit.
 
  UNDER THE CLASS A PLAN, EACH SERIES MAY PAY PRUDENTIAL SECURITIES FOR ITS
DISTRIBUTION-RELATED ACTIVITIES WITH RESPECT TO CLASS A SHARES AT AN ANNUAL RATE
OF UP TO .30 OF 1% OF THE AVERAGE DAILY NET ASSETS OF THE CLASS A SHARES OF THE
SERIES. The Class A Plan provides that (i) up to .25 of 1% of the average daily
net assets of the Class A shares may be used to pay for personal service and/or
the maintenance of shareholder accounts (service fee) and (ii) total
distribution fees (including the service fee of up to .25 of 1%) may not exceed
 .30 of 1% of the average daily net assets of the Class A shares. Prudential
Securities has agreed to limit its distribution-related fees payable under the
Class A Plan to .10 of 1% of the average daily net assets of the Class A shares
for the fiscal year ending April 30, 1998.
 
  UNDER THE CLASS B AND CLASS C PLANS, EACH SERIES MAY PAY PRUDENTIAL SECURITIES
FOR ITS DISTRIBUTION-RELATED ACTIVITIES WITH RESPECT TO CLASS B AND CLASS C
SHARES AT AN ANNUAL RATE OF UP TO .50 OF 1% AND UP TO 1% OF THE AVERAGE DAILY
NET ASSETS OF THE CLASS B AND CLASS C SHARES, RESPECTIVELY. The Class B Plan
provides for the payment to Prudential Securities of (i) an asset-based sales
charge of up to .50 of 1% of the average daily net assets of the Class B shares,
and (ii) a service fee of up to .25 of 1% of the average daily net assets of the
Class B shares; provided that the total distribution-related fee does not exceed
 .50 of 1%. The Class C Plan provides for the payment to Prudential Securities of
(i) an asset-based sales charge of up to .75 of 1% of the average daily net
assets of the Class C shares, and (ii) a service fee of up to .25 of 1% of the
average daily net assets of the Class C shares. The service fee is used to pay
for personal service and/or the maintenance of shareholders accounts. Prudential
Securities has agreed to limit its distribution-related fees payable under the
Class C Plan to .75 of 1% of the average daily net assets of the Class C shares
for the fiscal year ending April 30, 1998. Prudential Securities also receives
contingent deferred sales charges from certain redeeming shareholders. See
"Shareholder Guide--How to Sell Your Shares-- Contingent Deferred Sales
Charges."
 
  For the fiscal year ended April 30, 1997, each Series paid distribution
expenses of .10%, .50% and .75% of the average daily net assets of the Class A,
Class B and Class C shares, respectively. The Series record all payments made
under the Plans as expenses in the calculation of net investment income. See
"Distributor" in the Statement of Additional Information.
 
  Distribution expenses attributable to the sale of Class A, Class B and Class C
shares of each Series will be allocated to each such class based upon the ratio
of sales of each such class to the sales of Class A, Class B and Class C shares
of the Series other than expenses allocable to a particular class. The
distribution fee and sales charge of one class will not be used to subsidize the
sale of another class.
 
  Each Plan provides that it shall continue in effect from year to year provided
that a majority of the Trustees of the Fund, including a majority of the
Trustees who are not "interested persons" of the Fund (as defined in the
Investment Company Act) and who have no direct or indirect financial interest in
the operation of the Plan or any agreement related to the Plan (the Rule 12b-1
 
                                       30
<PAGE>
Trustees), vote annually to continue the Plan. Each Plan may be terminated with
respect to a Series at any time by vote of a majority of the Rule 12b-1 Trustees
or of a majority of the outstanding shares of the applicable class of the
Series. The Series will not be obligated to pay distribution and service fees
incurred under any Plan if it is terminated or not continued.
 
  In addition to distribution and service fees paid by the Fund under the Class
A, Class B and Class C Plans, the Manager (or one of its affiliates) may make
payments out of its own resources to dealers (including Prudential Securities)
and other persons who distribute shares of the Fund (including Class Z shares).
Such payments may be calculated by reference to the net asset value of shares
sold by such persons or otherwise.
 
  The Distributor is subject to the rules of the National Association of
Securities Dealers, Inc. (the NASD) governing maximum sales charges. See
"Distributor" in the Statement of Additional Information.
 
  On October 21, 1993, PSI entered into an omnibus settlement with the SEC,
state securities regulators (with the exception of the Texas Securities
Commissioner who joined the settlement on January 18, 1994) and the NASD to
resolve allegations that from 1980 through 1990 PSI sold certain limited
partnership interests in violation of securities laws to persons for whom such
securities were not suitable and misrepresented the safety, potential returns
and liquidity of these investments. Without admitting or denying the allegations
asserted against it, PSI consented to the entry of an SEC Administrative Order
which stated that PSI's conduct violated the federal securities laws, directed
PSI to cease and desist from violating the federal securities laws, pay civil
penalties, and adopt certain remedial measures to address the violations.
 
  Pursuant to the terms of the SEC settlement, PSI agreed to the imposition of a
$10,000,000 civil penalty, established a settlement fund in the amount of
$330,000,000 and procedures to resolve legitimate claims for compensatory
damages by purchasers of the partnership interests. PSI has agreed to provide
additional funds, if necessary, for the purpose of the settlement fund. PSI's
settlement with the state securities regulators included an agreement to pay a
penalty of $500,000 per jurisdiction. PSI consented to a censure and to the
payment of a $5,000,000 fine in settling the NASD action.
 
  In October 1994, a criminal complaint was filed with the United States
Magistrate for the Southern District of New York alleging that PSI committed
fraud in connection with the sale of certain limited partnership interests in
violation of federal securities laws. An agreement was simultaneously filed to
defer prosecution of these charges for a period of three years from the signing
of the agreement, provided that PSI complies with the terms of the agreement.
If, upon completion of the three year period, PSI has complied with the terms of
the agreement, no prosecution will be instituted by the United States for the
offenses charged in the complaint. If on the other hand, during the course of
the three year period, PSI violates the terms of the agreement, the U.S.
Attorney can elect to pursue these charges. Under the terms of the agreement,
PSI agreed, among other things, to pay an additional $330,000,000 into the fund
established by the SEC to pay restitution to investors who purchased certain PSI
limited partnership interests.
 
  For more detailed information concerning the foregoing matters, see
"Distributor" in the Statement of Additional Information, a copy of which may be
obtained at no cost by calling (800)225-1852.
 
  The Fund is not affected by PSI's financial condition and is an entirely
separate legal entity from PSI, which has no beneficial ownership therein and
the Fund's assets which are held by State Street Bank and Trust Company, an
independent custodian, are separate and distinct from PSI.
 
PORTFOLIO TRANSACTIONS
 
  Prudential Securities may act as a broker or futures commission merchant for
the Fund, provided that the commissions, fees or other remuneration it receives
are fair and reasonable. See "Portfolio Transactions and Brokerage" in the
Statement of Additional Information.
 
                                       31
<PAGE>
CUSTODIAN AND TRANSFER AND DIVIDEND DISBURSING AGENT
 
  State Street Bank and Trust Company, One Heritage Drive, North Quincy,
Massachusetts 02171, serves as Custodian for the portfolio securities and cash
of each Series and, in that capacity, maintains certain financial and accounting
books and records pursuant to an agreement with the Fund. Its mailing address is
P.O. Box 1713, Boston, Massachusetts 02105.
 
  Prudential Mutual Fund Services LLC (PMFS), Raritan Plaza One, Edison, New
Jersey 08837, serves as Transfer Agent and Dividend Disbursing Agent and in
those capacities maintains certain books and records for the Fund. PMFS is a
wholly-owned subsidiary of PIFM. Its mailing address is P.O. Box 15005, New
Brunswick, New Jersey 08906-5005.
 
                         HOW THE FUND VALUES ITS SHARES
 
  EACH SERIES' NET ASSET VALUE PER SHARE OR NAV IS DETERMINED BY SUBTRACTING ITS
LIABILITIES FROM THE VALUE OF ITS ASSETS AND DIVIDING THE REMAINDER BY THE
NUMBER OF OUTSTANDING SHARES. NAV IS CALCULATED SEPARATELY FOR EACH CLASS. THE
TRUSTEES HAVE FIXED THE SPECIFIC TIME OF DAY FOR THE COMPUTATION OF THE SERIES'
NET ASSET VALUE TO BE AS OF 4:15 P.M., NEW YORK TIME.
 
  Portfolio securities are valued based on market quotations or, if not readily
available, at fair value as determined in good faith under procedures
established by the Fund's Trustees. Securities may also be valued based on
values provided by a pricing service. See "Net Asset Value" in the Statement of
Additional Information.
 
  Each Series will compute its NAV once daily on days that the New York Stock
Exchange is open for trading except on days on which no orders to purchase, sell
or redeem shares have been received by the Series or days on which changes in
the value of the Series' portfolio securities do not materially affect the NAV.
 
  Although the legal rights of each class of shares are substantially identical,
the different expenses borne by each class will result in different dividends.
As long as the Series declare dividends daily, the NAV of the Class A, Class B,
Class C and Class Z shares will generally be the same. It is expected, however,
that the Series' dividends will differ by approximately the amount of any
distribution and/or service fee expense accrual differential among the classes.
 
                      HOW THE FUND CALCULATES PERFORMANCE
 
  FROM TIME TO TIME THE FUND MAY ADVERTISE THE "YIELD," "TAX EQUIVALENT YIELD"
AND "TOTAL RETURN" (INCLUDING "AVERAGE ANNUAL" TOTAL RETURN AND "AGGREGATE"
TOTAL RETURN) OF A SERIES IN ADVERTISEMENTS OR SALES LITERATURE. YIELD, TAX
EQUIVALENT YIELD AND TOTAL RETURN ARE CALCULATED SEPARATELY FOR CLASS A, CLASS
B, CLASS C AND CLASS Z SHARES. THESE FIGURES ARE NOT INTENDED TO INDICATE FUTURE
PERFORMANCE. The "yield" refers to the income generated by an investment in a
Series over a 30-day period. This income is then "annualized"; that is, the
amount of income generated by the investment during that 30-day period is
assumed to be generated each 30-day period for twelve periods and is shown as a
percentage of the investment. The income earned on the investment is also
assumed to be reinvested at the end of the sixth 30-day period. The "tax
equivalent yield" is calculated similarly to the "yield," except that the yield
is increased using a stated income tax rate to demonstrate the taxable yield
necessary to produce an after-tax yield equivalent to a Series. The "total
return" shows how much an investment in a Series would have increased
(decreased) over a specified period of time (I.E., one, five or ten years or
since inception of the Series) assuming that all distributions and dividends by
the Series were reinvested on the reinvestment dates during the period and less
all recurring fees. The "aggregate" total return reflects actual performance
over a stated period of time. "Average annual" total return is a hypothetical
rate of return that, if achieved annually, would have produced the same
aggregate total return if
 
                                       32
<PAGE>
performance had been constant over the entire period. "Average annual" total
return smooths out variations in performance and takes into account any
applicable initial or contingent deferred sales charges. Neither "average
annual" total return nor "aggregate" total return takes into account any federal
or state income taxes which may be payable upon redemption. The Fund also may
include comparative performance information in advertising or marketing the
shares of each Series. Such performance information may include data from Lipper
Analytical Services, Inc., Morningstar Publications, Inc., other industry
publications, business periodicals and market indices. See "Performance
Information" in the Statement of Additional Information. Further performance
information is contained in the Series' annual and semi-annual reports to
shareholders, which may be obtained without charge. See "Shareholder
Guide--Shareholder Services--Reports to Shareholders."
 
                       TAXES, DIVIDENDS AND DISTRIBUTIONS
 
TAXATION OF THE FUND
 
  EACH SERIES OF THE FUND HAS ELECTED TO QUALIFY AND INTENDS TO REMAIN QUALIFIED
AS A REGULATED INVESTMENT COMPANY UNDER THE INTERNAL REVENUE CODE. ACCORDINGLY,
EACH SERIES WILL NOT BE SUBJECT TO FEDERAL INCOME TAXES ON ITS NET TAXABLE
INVESTMENT INCOME AND NET CAPITAL GAINS, IF ANY, THAT IT DISTRIBUTES TO ITS
SHAREHOLDERS. TO THE EXTENT NOT DISTRIBUTED BY A SERIES, NET TAXABLE INVESTMENT
INCOME AND CAPITAL GAINS ARE TAXABLE TO THE SERIES. See "Taxes, Dividends and
Distributions" in the Statement of Additional Information.
 
  To the extent a Series invests in taxable obligations, it will earn taxable
investment income. Also, to the extent a Series sells securities or engages in
hedging transactions in futures contracts and options thereon, it may earn both
short-term and long-term capital gain or loss. Capital gain or loss may also
arise upon the sale of municipal securities, as well as taxable obligations.
Under the Internal Revenue Code, special rules apply to the treatment of certain
options and futures contracts (Section 1256 contracts). At the end of each year,
such investments held by the Series will be required to be "marked to market"
for federal income tax purposes; that is, treated as having been sold at market
value. Sixty percent of any gain or loss recognized on these "deemed sales" and
on actual dispositions will be treated as long-term capital gain or loss, and
the remainder will be treated as short-term capital gain or loss. See "Taxes,
Dividends and Distributions" in the Statement of Additional Information.
 
  Gain or loss realized by the Series from the sale of securities generally will
be treated as capital gain or loss; however, gain from the sale of certain
securities (including municipal obligations) will be treated as ordinary income
to the extent of any "market discount." Market discount generally is the
difference, if any, between the price paid by the Series for the security and
the principal amount of the security (or, in the case of a security issued at an
original issue discount, the revised issue price of the security). The market
discount rule does not apply to any security that was acquired by the Series at
its original issue.
 
TAXATION OF SHAREHOLDERS
 
  In general, the character of tax-exempt interest distributed by each Series
will flow through as tax-exempt interest to its shareholders provided that 50%
or more of the value of its assets at the end of each quarter of its taxable
year is invested in state, municipal and other obligations, the interest on
which is excluded from gross income for federal income tax purposes. During
normal market conditions, at least 80% of each Series' net assets will be
invested in such obligations. See "How the Fund Invests--Other Investments and
Policies."
 
  Any dividends out of net taxable investment income, together with
distributions of net short-term gains (I.E., the excess of net short-term
capital gains over net long-term capital losses) distributed to shareholders,
will be taxable as ordinary income to the shareholder whether or not reinvested.
Any net capital gains (I.E., the excess of net long-term capital gains over net
short-term capital losses) distributed to shareholders will be taxable as
long-term capital gains to the shareholders, whether or not reinvested
 
                                       33
<PAGE>
and regardless of the length of time a shareholder has owned his or her shares.
The maximum long-term capital gains rate for individuals is currently 28%. The
maximum long-term capital gains rate for corporate shareholders is currently the
same as the maximum tax rate for ordinary income.
 
  Any gain or loss realized upon a sale, exchange or redemption of a Series'
shares by a shareholder who is not a dealer in securities will be treated as
long-term capital gain or loss if the shares have been held more than one year
and otherwise as short-term capital gain or loss. Any loss, however, with
respect to the sale, exchange or redemption of shares that are held for six
months or less will be disallowed to the extent of any exempt interest dividends
received by the shareholder with respect to such shares, and otherwise will be
treated as long-term capital loss to the extent of any capital gain
distributions received by the shareholder with respect to such shares.
 
  Any loss realized on a sale, redemption or exchange of shares of the Fund by a
shareholder will be disallowed to the extent the shares are replaced within a
61-day period (beginning 30 days before the disposition of shares). Shares
purchased pursuant to the reinvestment of a dividend will constitute a
replacement of shares.
 
  A shareholder who acquires shares of the Fund and sells or otherwise disposes
of such shares within 90 days of acquisition may not be allowed to include
certain sales charges incurred in acquiring such shares for purposes of
calculating gain or loss realized upon a sale or exchange of shares of the Fund.
 
  CERTAIN INVESTORS MAY INCUR FEDERAL ALTERNATIVE MINIMUM TAX LIABILITY AS A
RESULT OF THEIR INVESTMENT IN THE FUND. Tax-exempt interest from certain
municipal obligations (I.E., certain private activity bonds issued after August
7, 1986) will be treated as an item of tax preference for purposes of the
alternative minimum tax. The Fund anticipates that, under regulations to be
promulgated, items of tax preference incurred by a Series which has invested in
such municipal obligations will be attributed to the Series' shareholders,
although some portion of such items could be allocated to the Series itself.
Depending upon each shareholder's individual circumstances, the attribution of
items of tax preference incurred by a Series could result in liability for the
shareholder for the alternative minimum tax. Similarly, a Series could be liable
for the alternative minimum tax for items of tax preference attributed to it.
 
  With the exception of the High Yield Series, the Fund intends to minimize the
investment of each Series in municipal obligations of the type that will produce
items of tax preference. With respect to the High Yield Series, however, it is
anticipated that a substantial portion of the Series' assets will be invested in
such obligations.
 
  Distributions relating to interest on all municipal obligations will be
included in a corporate shareholder's current earnings for purposes of the
adjustment for current earnings for alternative minimum tax purposes. Corporate
shareholders should consult with their tax advisers with respect to this
potential adjustment.
 
  The Fund has obtained opinions of counsel to the effect that neither (i) the
conversion of Class B shares into Class A shares nor (ii) the exchange of any
class of the Fund's shares for any other class of its shares constitutes a
taxable event for federal income tax purposes. However, such opinions are not
binding on the Internal Revenue Service.
 
  Shareholders are advised to consult their own tax advisers regarding specific
questions as to federal, state, local or foreign taxes. See "Taxes, Dividends
and Distributions" in the Statement of Additional Information.
 
WITHHOLDING TAXES
 
  Under the Internal Revenue Code, the Fund is required to withhold and remit to
the U.S. Treasury 31% of redemption proceeds on the accounts of those
shareholders who fail to furnish their tax identification numbers on IRS Form
W-9 (or IRS Form W-8 in the case of certain foreign shareholders) with the
required certifications regarding the shareholders' status under the federal
income tax law. Withholding generally is also required on taxable dividends and
capital gains distributions made by a Series.
 
                                       34
<PAGE>
  Dividends of net investment income and distributions of net short-term capital
gains paid to a shareholder (including a shareholder acting as a nominee or
fiduciary) who is a nonresident alien individual, a foreign corporation or a
foreign partnership (foreign shareholder) are subject to a 30% (or lower treaty
rate) withholding tax upon the gross amount of the dividends unless the
dividends are effectively connected with a U.S. trade or business conducted by
the foreign shareholder. Capital gain dividends paid to a foreign shareholder
are generally not subject to withholding tax. A foreign shareholder will,
however, be required to pay U.S. income tax on any dividends and capital gain
distributions which are effectively connected with a U.S. trade or business of
the foreign shareholder.
 
DIVIDENDS AND DISTRIBUTIONS
 
  THE FUND EXPECTS TO DECLARE DAILY AND PAY MONTHLY DIVIDENDS OF NET INVESTMENT
INCOME, IF ANY, AND MAKE DISTRIBUTIONS AT LEAST ANNUALLY OF ANY NET CAPITAL
GAINS. Dividends paid by each Series with respect to each class of shares, to
the extent dividends are paid, will be calculated in the same manner, at the
same time, on the same day and will be in the same amount except that each class
(other than Class Z) will bear its own distribution charges, generally resulting
in lower dividends for Class B and Class C shares in relation to Class A shares
and lower dividends for Class A shares in relation to Class Z shares.
Distributions of net capital gains, if any, will be paid in the same amount for
each class of shares. See "How the Fund Values its Shares."
 
  DIVIDENDS AND DISTRIBUTIONS WILL BE PAID IN ADDITIONAL SHARES OF A SERIES
BASED ON THE NAV OF EACH CLASS ON THE PAYMENT DATE, OR SUCH OTHER DATE AS THE
TRUSTEES MAY DETERMINE, UNLESS THE SHAREHOLDER ELECTS IN WRITING NOT LESS THAN
FIVE BUSINESS DAYS PRIOR TO THE RECORD DATE TO RECEIVE SUCH DIVIDENDS AND
DISTRIBUTIONS IN CASH. Such election should be submitted to Prudential Mutual
Fund Services LLC, Attention: Account Maintenance, P.O. Box 15015, New
Brunswick, New Jersey 08906-5015. If you hold shares through Prudential
Securities, you should contact your financial adviser to elect to receive
dividends and distributions in cash. The Fund will notify each shareholder after
the close of the Fund's taxable year both of the dollar amount and the taxable
status of that year's dividends and distributions on a per share basis.
 
  Any taxable dividends or distributions of net capital gains paid shortly after
a purchase by an investor will have the effect of reducing the per share net
asset value of the investor's shares by the per share amount of the dividends or
distributions. Such dividends or distributions, although in effect a return of
invested principal, are subject to federal income taxes. Accordingly, prior to
purchasing shares of a Series, an investor should carefully consider the impact
of taxable dividends and capital gains distributions which are expected to be or
have been announced.
 
                              GENERAL INFORMATION
 
DESCRIPTION OF SHARES
 
  THE FUND IS AN OPEN-END, MANAGEMENT INVESTMENT COMPANY COMPRISED OF THREE
SERIES WHICH WAS ORGANIZED UNDER THE LAWS OF MASSACHUSETTS ON NOVEMBER 3, 1986
AS AN UNINCORPORATED BUSINESS TRUST, A FORM OF ORGANIZATION THAT IS COMMONLY
CALLED A MASSACHUSETTS BUSINESS TRUST. THE FUND IS AUTHORIZED TO ISSUE AN
UNLIMITED NUMBER OF SHARES, DIVIDED INTO FOUR CLASSES, DESIGNATED CLASS A, CLASS
B, CLASS C AND CLASS Z. Each class of shares represents an interest in the same
assets of the Fund and is identical in all respects except that (i) each class
is subject to different sales charges and distribution and/or service fees
(except for Class Z shares, which are not subject to any sales charges or
distribution and/or service fees), which may affect performance, (ii) each class
has exclusive voting rights on any matter submitted to shareholders that relates
solely to its arrangement and has separate voting rights on any matter submitted
to shareholders in which the interests of one class differ from the interests of
any other class, (iii) each class has a different exchange privilege, (iv) only
Class B shares
 
                                       35
<PAGE>
have a conversion feature and (v) Class Z shares are offered exclusively to a
limited group of investors. See "How the Fund is Managed--Distributor." In
accordance with the Fund's Declaration of Trust, the Trustees may authorize the
creation of additional series and classes of shares within such series, with
such preferences, privileges, limitations and voting and dividend rights as the
Trustees may determine.
 
  Shares of the Fund, when issued, are fully paid, nonassessable, fully
transferable and redeemable at the option of the holder. Shares are also
redeemable at the option of the Fund under certain circumstances as described
under "Shareholder Guide--How to Sell Your Shares." Each share of each class of
each Series is equal as to earnings, assets and voting privileges, except as
noted above, and each class of shares (with the exception of Class Z shares,
which are not subject to any distribution or service fees) bears the expenses
related to the distribution of its shares. Except for the conversion feature
applicable to the Class B shares, there are no conversion, preemptive or other
subscription rights. In the event of liquidation, each share of beneficial
interest in each Series is entitled to its portion of all of the Fund's assets
after all debt and expenses of the Fund have been paid. Since Class B and Class
C shares bear higher distribution expenses than Class A shares, the liquidation
proceeds to shareholders of those classes are likely to be lower than to Class A
shareholders and to Class Z shareholders, whose shares are not subject to any
distribution and/or service fees. The Fund's shares do not have cumulative
voting rights for the election of Trustees.
 
  THE FUND DOES NOT INTEND TO HOLD ANNUAL MEETINGS OF SHAREHOLDERS UNLESS
OTHERWISE REQUIRED BY LAW. THE FUND WILL NOT BE REQUIRED TO HOLD MEETINGS OF
SHAREHOLDERS UNLESS, FOR EXAMPLE, THE ELECTION OF TRUSTEES IS REQUIRED TO BE
ACTED ON BY SHAREHOLDERS UNDER THE INVESTMENT COMPANY ACT. SHAREHOLDERS HAVE
CERTAIN RIGHTS, INCLUDING THE RIGHT TO CALL A MEETING UPON A VOTE OF 10% OF THE
FUND'S OUTSTANDING SHARES FOR THE PURPOSE OF VOTING ON THE REMOVAL OF ONE OR
MORE TRUSTEES OR TO TRANSACT ANY OTHER BUSINESS.
 
  The Declaration of Trust and the By-Laws of the Fund are designed to make the
Fund similar in certain respects to a Massachusetts business corporation. The
principal distinction between a Massachusetts business corporation and a
Massachusetts business trust relates to shareholder liability. Under
Massachusetts law, shareholders of a business trust may, under certain
circumstances, be held personally liable as partners for the obligations of the
Fund, which is not the case with a corporation. The Declaration of Trust of the
Fund provides that shareholders shall not be subject to any personal liability
for the acts or obligations of the Fund and that every written obligation,
contract, instrument or undertaking made by the Fund shall contain a provision
to the effect that the shareholders are not individually bound thereunder.
 
ADDITIONAL INFORMATION
 
  This Prospectus, including the Statement of Additional Information which has
been incorporated by reference herein, does not contain all the information set
forth in the Registration Statement filed by the Fund with the SEC under the
Securities Act of 1933. Copies of the Registration Statement may be obtained at
a reasonable charge from the SEC or may be examined, without charge, at the
office of the SEC in Washington, D.C.
 
                                       36
<PAGE>
                               SHAREHOLDER GUIDE
 
HOW TO BUY SHARES OF THE FUND
 
  YOU MAY PURCHASE SHARES OF EACH SERIES OF THE FUND THROUGH PRUDENTIAL
SECURITIES, PRUSEC OR DIRECTLY FROM THE FUND, THROUGH ITS TRANSFER AGENT,
PRUDENTIAL MUTUAL FUND SERVICES LLC (PMFS OR THE TRANSFER AGENT) ATTENTION:
INVESTMENT SERVICES, P.O. BOX 15020, NEW BRUNSWICK, NEW JERSEY 08906-5020.
Participants in programs sponsored by Prudential Retirement Services should
contact their client representative for more information about Class Z shares.
The purchase price is the NAV per share next determined following receipt of an
order in proper form by the Transfer Agent or Prudential Securities plus a sales
charge which, at your option, may be imposed either (i) at the time of purchase
(Class A shares) or (ii) on a deferred basis (Class B or Class C shares). Class
Z shares are offered to a limited group of investors at net asset value without
any sales charge. Payment may be made by wire, check or through your brokerage
account. See "Alternative Purchase Plan" below. See also "How the Fund Values
its Shares."
 
  An investment in the Series may not be appropriate for tax-exempt or
tax-deferred investors. Such investors should consult their own tax advisers.
 
  The minimum initial investment is $1,000 for Class A and Class B shares and
$5,000 for Class C shares except that the minimum initial investment for Class C
shares may be waived from time to time. There is no minimum investment
requirement for Class Z shares. The minimum subsequent investment is $100 for
all classes, except for Class Z shares, for which there is no minimum. All
minimum investment requirements are waived for certain employee savings plans.
For purchases made through the Automatic Savings Accumulation Plan, the minimum
initial and subsequent investment is $50. See "Shareholder Services" below.
 
  Application forms can be obtained from PMFS, Prudential Securities or Prusec
or a selected dealer (Class A only). If a share certificate is desired, it must
be requested in writing for each transaction. Certificates are issued only for
full shares. Shareholders who hold their shares through Prudential Securities
will not receive share certificates.
 
  The Fund reserves the right to reject any purchase order (including an
exchange into the Fund) or to suspend or modify the continuous offering of its
shares. See "How to Sell Your Shares" below.
 
  Your dealer is responsible for forwarding payment promptly to the Fund. The
Distributor reserves the right to cancel any purchase order for which payment
has not been received by the third business day following the investment.
 
  Transactions in Fund shares may be subject to postage and handling charges
imposed by your dealer.
 
  PURCHASE BY WIRE. For an initial purchase of shares of the Fund by wire, you
must first telephone PMFS at (800) 225-1852 (toll-free) to receive an account
number. The following information will be requested: your name, address, tax
identification number, class election, dividend distribution election, amount
being wired and wiring bank. Instructions should then be given by you to your
bank to transfer funds by wire to State Street Bank and Trust Company, Boston,
Massachusetts, Custody and Shareholder Services Division, Attention: Prudential
Municipal Bond Fund, specifying on the wire the account number assigned by PMFS
and your name and identifying the class in which you are eligible to invest
(Class A, Class B, Class C or Class Z shares) and the name of the Series.
 
  If you arrange for receipt by State Street of Federal Funds prior to the
calculation of NAV (4:15 P.M., New York time), on a business day, you may
purchase shares of a Series as of that day. See "Net Asset Value" in the
Statement of Additional Information.
 
                                       37
<PAGE>
  In making a subsequent purchase order by wire, you should wire State Street
directly and should be sure that the wire specifies Prudential Municipal Bond
Fund, the name of the Series, Class A, Class B, Class C or Class Z shares and
your name and individual account number. It is not necessary to call PMFS to
make subsequent purchase orders utilizing Federal Funds. The minimum amount
which may be invested by wire is $1,000.
 
ALTERNATIVE PURCHASE PLAN
 
  THE FUND OFFERS THROUGH THIS PROSPECTUS FOUR CLASSES OF SHARES (CLASS A, CLASS
B, CLASS C AND CLASS Z SHARES) WHICH ALLOWS YOU TO CHOOSE THE MOST BENEFICIAL
SALES CHARGE STRUCTURE FOR YOUR INDIVIDUAL CIRCUMSTANCES, GIVEN THE AMOUNT OF
THE PURCHASE AND THE LENGTH OF TIME YOU EXPECT TO HOLD THE SHARES AND OTHER
RELEVANT CIRCUMSTANCES (ALTERNATIVE PURCHASE PLAN).
 
<TABLE>
<CAPTION>
                                                     ANNUAL 12B-1 FEES
                                                    (AS A % OF AVERAGE
                                                           DAILY
                       SALES CHARGE                     NET ASSETS)                  OTHER INFORMATION
          --------------------------------------  -----------------------  --------------------------------------
<S>       <C>                                     <C>                      <C>
CLASS A   Maximum initial sales charge of 3% of   .30 of 1% (Currently     Initial sales charge waived or reduced
          the public offering price               being charged at a rate  for certain purchases
                                                  of .10 of 1%)
CLASS B   Maximum contingent deferred sales       .50 of 1%                Shares convert to Class A shares
          charge or CDSC of 5% of the lesser of                            approximately seven years after
          the amount invested or the redemption                            purchase
          proceeds; declines to zero after six
          years
CLASS C   Maximum CDSC of 1% of the lesser of     1% (Currently being      Shares do not convert to another class
          the amount invested or the redemption   charged at a rate of
          proceeds on redemptions made within     .75 of 1%)
          one year of purchase
CLASS Z   None                                    None                     Sold to a limited group of investors
</TABLE>
 
  The four classes of shares represent an interest in the same portfolio of
investments of each Series and have the same rights, except that (i) each class
is subject to different sales charges and distribution and/or service fees (with
the exception of Class Z shares, which are not subject to any distribution or
service fees), which may affect performance, (ii) each class has exclusive
voting rights on any matter submitted to shareholders that relates solely to its
arrangement and has separate voting rights on any matter submitted to
shareholders in which the interests of one class differ from the interests of
any other class, and (iii) only Class B shares have a conversion feature. The
four classes also have separate exchange privileges. See "How to Exchange Your
Shares" below. The income attributable to each class and the dividends payable
on the shares of each class will be reduced by the amount of the distribution
fee (if any) of each class. Class B and Class C shares bear the expenses of a
higher distribution fee which will generally cause them to have higher expense
ratios and to pay lower dividends than the Class A and Class Z shares.
 
  Financial advisers and other sales agents who sell shares of the Series will
receive different compensation for selling Class A, Class B, Class C and Class Z
shares and will generally receive more compensation initially for selling Class
A and Class B shares than for selling Class C or Class Z shares.
 
  IN SELECTING A PURCHASE ALTERNATIVE, YOU SHOULD CONSIDER, AMONG OTHER THINGS,
(1) the length of time you expect to hold your investment, (2) the amount of any
applicable sales charge (whether imposed at the time of purchase or redemption)
and distribution-related fees, as noted above, (3) whether you qualify for any
reduction or waiver of any applicable sales charge, (4) the various exchange
privileges among the different classes of shares (see "How to Exchange Your
Shares" below) and (5) the fact that Class B shares automatically convert to
Class A shares approximately seven years after purchase (see "Conversion
Feature--Class B Shares" below).
 
                                       38
<PAGE>
  The following is provided to assist you in determining which method of
purchase best suits your individual circumstances and is based on current fees
and expenses being charged to the Series:
 
  If you intend to hold your investment in a Series for less than 5 years and do
not qualify for a reduced sales charge on Class A shares, since Class A shares
are subject to a maximum initial sales charge of 3% and Class B shares are
subject to a CDSC of 5% which declines to zero over a 6 year period, you should
consider purchasing Class C shares over either Class A or Class B shares.
 
  If you intend to hold your investment for more than 5 years and do not qualify
for a reduced sales charge on Class A shares, since Class B shares convert to
Class A shares approximately 7 years after purchase and because all of your
money would be invested initially in the case of Class B shares, you should
consider purchasing Class B shares over either Class A or Class C shares.
 
  If you qualify for a reduced sales charge on Class A shares, it may be more
advantageous for you to purchase Class A shares over either Class B or Class C
shares regardless of how long you intend to hold your investment. However,
unlike Class B and Class C shares, you would not have all of your money invested
initially because the sales charge on Class A shares is deducted at the time of
purchase.
 
  If you do not qualify for a reduced sales charge on Class A shares and you
purchase Class C shares, you would have to hold your investment for more than 4
years in the case of Class C shares for the higher cumulative annual
distribution-related fee on those shares to exceed the initial sales charge plus
cumulative annual distribution-related fee on Class A shares. This does not take
into account the time value of money, which further reduces the impact of the
higher Class C distribution-related fee on the investment, fluctuations in net
asset value, the effect of the return on the investment over this period of time
or redemptions when the CDSC is applicable.
 
  ALL PURCHASES OF $1 MILLION OR MORE, EITHER AS PART OF A SINGLE INVESTMENT OR
UNDER RIGHTS OF ACCUMULATION OR LETTERS OF INTENT, MUST BE FOR CLASS A SHARES
UNLESS THE PURCHASER IS ELIGIBLE TO PURCHASE CLASS Z SHARES. See "Reduction and
Waiver of Initial Sales Charges" and "Class Z Shares" below.
 
  CLASS A SHARES
 
  The offering price of Class A shares for investors choosing the initial sales
charge alternative is the next determined NAV plus a sales charge (expressed as
a percentage of the offering price and of the amount invested) as shown in the
following table:
 
<TABLE>
<CAPTION>
                           SALES CHARGE AS   SALES CHARGE AS    DEALER CONCESSION
                            PERCENTAGE OF     PERCENTAGE OF     AS PERCENTAGE OF
   AMOUNT OF PURCHASE       OFFERING PRICE   AMOUNT INVESTED     OFFERING PRICE
- -------------------------  ----------------  ----------------  -------------------
<S>                        <C>               <C>               <C>
Less than $99,999                  3.00%             3.09%               3.00%
$100,000 to $249,999               2.50              2.56                2.50
$250,000 to $499,999               1.50              1.52                1.50
$500,000 to $999,999               1.00              1.01                1.00
$1,000,000 and above             None              None             None
</TABLE>
 
  The Distributor may reallow the entire initial sales charge to dealers.
Selling dealers may be deemed to be underwriters, as that term is defined in the
Securities Act of 1933.
 
  In connection with the sale of Class A shares at NAV (without payment of an
initial sales charge), the Manager, the Distributor or one of their affiliates
will pay dealers, financial advisers and other persons which distribute shares a
finders' fee from its own resources based on a percentage of the net asset value
of shares sold by such persons.
 
  REDUCTION AND WAIVER OF INITIAL SALES CHARGES. Reduced sales charges are
available through Rights of Accumulation and Letters of Intent. Shares of the
Fund and shares of other Prudential Mutual Funds (excluding money market funds
other than those
 
                                       39
<PAGE>
acquired pursuant to the exchange privilege) may be aggregated to determine the
applicable reduction. See "Purchase and Redemption of Fund Shares--Reduction and
Waiver of Initial Sales Charges--Class A Shares" in the Statement of Additional
Information.
 
  OTHER WAIVERS. Class A shares may be purchased at NAV, through Prudential
Securities or the Transfer Agent, by the following persons: (a) officers and
current and former Directors/Trustees of the Prudential Mutual Funds (including
the Fund), (b) employees of Prudential Securities and PIFM and their
subsidiaries and members of the families of such persons who maintain an
"employee related" account at Prudential Securities or the Transfer Agent, (c)
employees of subadvisers of the Prudential Mutual Funds provided that the
purchases at NAV are permitted by such person's employer, (d) Prudential
employees and special agents of Prudential and its subsidiaries and all persons
who have retired directly from active service with Prudential or one of its
subsidiaries, (e) registered representatives and employees of dealers who have
entered into a selected dealer agreement with Prudential Securities provided
that purchases at NAV are permitted by such person's employer and (f) investors
who have a business relationship with a financial adviser who joined Prudential
Securities from another investment firm, provided that (i) the purchase is made
within 180 days of the commencement of the financial adviser's employment at
Prudential Securities or within one year in the case of benefit plans, (ii) the
purchase is made with proceeds of a redemption of shares of any open-end
non-money market fund sponsored by the financial adviser's previous employer
(other than a fund which imposes a distribution or service fee of .25 of 1% or
less) and (iii) the financial adviser served as the client's broker on the
previous purchase.
 
  You must notify the Transfer Agent either directly or through Prudential
Securities or Prusec that you are entitled to the reduction or waiver of the
sales charge. The reduction or waiver will be granted subject to confirmation of
your entitlement. No initial sales charges are imposed upon Class A shares
acquired upon the reinvestment of dividends and distributions. See "Purchase and
Redemption of Fund Shares--Reduction and Waiver of Initial Sales Charges--Class
A Shares" in the Statement of Additional Information.
 
  CLASS B AND CLASS C SHARES
 
  The offering price of Class B and Class C shares for investors choosing one of
the deferred sales charge alternatives is the NAV next determined following
receipt of an order by the Transfer Agent or Prudential Securities. Although
there is no sales charge imposed at the time of purchase, redemptions of Class B
and Class C shares may be subject to a CDSC. See "How to Sell Your
Shares--Contingent Deferred Sales Charges." The Distributor will pay sales
commissions of up to 4% of the purchase price of Class B shares to dealers,
financial advisers and other persons who sell Class B shares at the time of sale
from its own resources. This facilitates the ability of the Fund to sell the
Class B shares without an initial sales charge being deducted at the time of
purchase. The Distributor anticipates that it will recoup its advancement of
sales commissions from the combination of the CDSC and the distribution fee. See
"How the Fund is Managed--Distributor." In connection with the sale of Class C
shares, the Distributor will pay dealers, financial advisers and other persons
which distribute Class C shares a sales commission of up to 1% of the purchase
price at the time of the sale.
 
  CLASS Z SHARES
 
  Class Z shares of the Fund are available for purchase by the following
categories of investors:
 
(i) participants in any fee-based program or trust program sponsored by
Prudential Securities, The Prudential Savings Bank, F.S.B. (or any affiliate)
which includes mutual funds as investment options and for which the Fund is an
available option; (ii) current and former Directors/Trustees of the Prudential
Mutual Funds (including the Fund); and (iii) employees of Prudential and/or
Prudential Securities who participate in a Prudential-sponsored employee saving
plan.
 
  In connection with the sale of Class Z shares, the Manager, the Distributor or
one of their affiliates may pay dealers, financial advisers and other persons
which distribute shares a finders' fee based on a percentage of the net asset
value of shares sold by such persons.
 
                                       40
<PAGE>
HOW TO SELL YOUR SHARES
 
  YOU CAN REDEEM YOUR SHARES OF EACH SERIES OF THE FUND AT ANY TIME FOR CASH AT
THE NAV NEXT DETERMINED AFTER THE REDEMPTION REQUEST IS RECEIVED IN PROPER FORM
BY THE TRANSFER AGENT OR PRUDENTIAL SECURITIES. SEE "HOW THE FUND VALUES ITS
SHARES." In certain cases, however, redemption proceeds will be reduced by the
amount of any applicable contingent deferred sales charge, as described below.
See "Contingent Deferred Sales Charges" below.
 
  IF YOU HOLD SHARES OF THE FUND THROUGH PRUDENTIAL SECURITIES, YOU MUST REDEEM
YOUR SHARES THROUGH PRUDENTIAL SECURITIES. PLEASE CONTACT YOUR PRUDENTIAL
SECURITIES FINANCIAL ADVISER. IF YOU HOLD SHARES IN NON-CERTIFICATE FORM, A
WRITTEN REQUEST FOR REDEMPTION SIGNED BY YOU EXACTLY AS THE ACCOUNT IS
REGISTERED IS REQUIRED. IF YOU HOLD CERTIFICATES, THE CERTIFICATES, SIGNED IN
THE NAME(S) SHOWN ON THE FACE OF THE CERTIFICATES, MUST BE RECEIVED BY THE
TRANSFER AGENT IN ORDER FOR THE REDEMPTION REQUEST TO BE PROCESSED. IF
REDEMPTION IS REQUESTED BY A CORPORATION, PARTNERSHIP, TRUST OR FIDUCIARY,
WRITTEN EVIDENCE OF AUTHORITY ACCEPTABLE TO THE TRANSFER AGENT MUST BE SUBMITTED
BEFORE SUCH REQUEST WILL BE ACCEPTED. All correspondence and documents
concerning redemptions should be sent to the Fund in care of its Transfer Agent,
Prudential Mutual Fund Services LLC, Attention: Redemption Services, P.O. Box
15010, New Brunswick, New Jersey 08906-5010.
 
  If the proceeds of the redemption (a) exceed $50,000, (b) are to be paid to a
person other than the record owner, (c) are to be sent to an address other than
the address on the Transfer Agent's records, or (d) are to be paid to a
corporation, partnership, trust or fiduciary, the signature(s) on the redemption
request and on the certificates, if any, or stock power must be guaranteed by an
"eligible guarantor institution." An "eligible guarantor institution" includes
any bank, broker, dealer or credit union. The Transfer Agent reserves the right
to request additional information from, and make reasonable inquiries of, any
eligible guarantor institution. For clients of Prusec, a signature guarantee may
be obtained from the agency or office manager of most Prudential Insurance and
Financial Services or Preferred Services offices.
 
  PAYMENT FOR SHARES PRESENTED FOR REDEMPTION WILL BE MADE BY CHECK WITHIN SEVEN
DAYS AFTER RECEIPT BY THE TRANSFER AGENT OF THE CERTIFICATE AND/OR WRITTEN
REQUEST, EXCEPT AS INDICATED BELOW. IF YOU HOLD SHARES THROUGH PRUDENTIAL
SECURITIES, PAYMENT FOR SHARES PRESENTED FOR REDEMPTION WILL BE CREDITED TO YOUR
PRUDENTIAL SECURITIES ACCOUNT, UNLESS YOU INDICATE OTHERWISE. Such payment may
be postponed or the right of redemption suspended at times (a) when the New York
Stock Exchange is closed for other than customary weekends and holidays, (b)
when trading on such Exchange is restricted, (c) when an emergency exists as a
result of which disposal by the Fund of securities owned by it is not reasonably
practicable or it is not reasonably practicable for the Fund fairly to determine
the value of its net assets, or (d) during any other period when the SEC, by
order, so permits, provided that applicable rules and regulations of the SEC
shall govern as to whether the conditions prescribed in (b), (c) or (d) exist.
 
  PAYMENT FOR REDEMPTION OF RECENTLY PURCHASED SHARES WILL BE DELAYED UNTIL THE
FUND OR ITS TRANSFER AGENT HAS BEEN ADVISED THAT THE PURCHASE CHECK HAS BEEN
HONORED, UP TO 10 CALENDAR DAYS FROM THE TIME OF RECEIPT OF THE PURCHASE CHECK
BY THE TRANSFER AGENT. SUCH DELAY MAY BE AVOIDED BY PURCHASING SHARES BY WIRE OR
BY CERTIFIED OR CASHIER'S CHECK.
 
  REDEMPTION IN KIND. If the Trustees determine that it would be detrimental to
the best interests of the remaining shareholders of the Fund to make payment
wholly or partly in cash, the Fund may pay the redemption price in whole or in
part by a distribution in kind of securities from the investment portfolio of a
Series, in lieu of cash, in conformity with applicable rules of the SEC.
Securities will be readily marketable and will be valued in the same manner as a
regular redemption. See "How the Fund Values its Shares." If your shares are
redeemed in kind, you would incur transaction costs in converting the assets
into cash. The Fund, however, has elected to be governed by Rule 18f-1 under the
Investment Company Act, under which the Fund is obligated to redeem shares
solely in cash up to the lesser of $250,000 or 1% of the net asset value of the
Fund during any 90-day period for any one shareholder.
 
                                       41
<PAGE>
  INVOLUNTARY REDEMPTION. In order to reduce expenses of the Fund, the Trustees
may redeem all of the shares of any shareholder, other than a shareholder which
is an IRA or other tax-deferred retirement plan, whose account has a net asset
value of less than $500 due to a redemption. The Fund will give such
shareholders 60 days' prior written notice in which to purchase sufficient
additional shares to avoid such redemption. No contingent deferred sales charge
will be imposed on any such involuntary redemption.
 
  90-DAY REPURCHASE PRIVILEGE. If you redeem your shares and have not previously
exercised the repurchase privilege, you may reinvest any portion or all of the
proceeds of such redemption in shares of a Series of the Fund at the NAV next
determined after the order is received, which must be within 90 days after the
date of the redemption. Any CDSC paid in connection with such redemption will be
credited (in shares) to your account. If less than a full repurchase is made,
the credit will be on a PRO RATA basis. You must notify the Fund's Transfer
Agent, either directly or through Prudential Securities, at the time the
repurchase privilege is exercised to adjust your account for the CDSC you
previously paid. Thereafter, any redemptions will be subject to the CDSC
applicable at the time of the redemption. See "Contingent Deferred Sales
Charges" below. Exercise of the repurchase privilege may affect the federal tax
treatment of any gain or loss realized upon redemption. See "Taxes, Dividends
and Distributions" in the Statement of Additional Information.
 
  CONTINGENT DEFERRED SALES CHARGES
 
  Redemptions of Class B shares will be subject to a contingent deferred sales
charge or CDSC declining from 5% to zero over a six-year period. Class C shares
redeemed within one year of purchase will be subject to a 1% CDSC. The CDSC will
be deducted from the redemption proceeds and reduce the amount paid to you. The
CDSC will be imposed on any redemption by you which reduces the current value of
your Class B or Class C shares of a Series of the Fund to an amount which is
lower than the amount of all payments by you for shares of the Series during the
preceding six years, in the case of Class B shares, and one year, in the case of
Class C shares. A CDSC will be applied on the lesser of the original purchase
price or the current value of the shares being redeemed. Increases in the value
of your shares or shares acquired through reinvestment of dividends or
distributions are not subject to a CDSC. The amount of any contingent deferred
sales charge will be paid to and retained by the Distributor. See "How the Fund
is Managed--Distributor" and "Waiver of the Contingent Deferred Sales
Charges--Class B Shares" below.
 
  The amount of the CDSC, if any, will vary depending on the number of years
from the time of payment for the purchase of shares until the time of redemption
of such shares. Solely for purposes of determining the number of years from the
time of any payment for the purchase of shares, all payments during a month will
be aggregated and deemed to have been made on the last day of the month. The
CDSC will be calculated from the first day of the month after the initial
purchase, excluding the time shares were held in a money market fund. See "How
to Exchange Your Shares" below.
 
  The following table sets forth the rates of the CDSC applicable to redemptions
of Class B shares:
 
<TABLE>
<CAPTION>
                                             CONTINGENT DEFERRED SALES
                                              CHARGE AS A PERCENTAGE
          YEAR SINCE PURCHASE                 OF DOLLARS INVESTED OR
          PAYMENT MADE                          REDEMPTION PROCEEDS
          -------------------------------    -------------------------
          <S>                                <C>
          First..........................                5.0%
          Second.........................                4.0%
          Third..........................                3.0%
          Fourth.........................                2.0%
          Fifth..........................                1.0%
          Sixth..........................                1.0%
          Seventh........................              None
</TABLE>
 
                                       42
<PAGE>
  In determining whether a CDSC is applicable to a redemption, the calculation
will be made in a manner that results in the lowest possible rate. It will be
assumed that the redemption is made first of amounts representing shares
acquired pursuant to the reinvestment of dividends and distributions; then of
amounts representing the increase in net asset value above the total amount of
payments for the purchase of Fund shares made during the preceding six years
(five years for Class B shares purchased prior to January 22, 1990); then of
amounts representing the cost of shares held beyond the applicable CDSC period;
and finally, of amounts representing the cost of shares held for the longest
period of time within the applicable CDSC period.
 
  For example, assume you purchased 100 Class B shares at $10 per share for a
cost of $1,000. Subsequently, you acquired 5 additional Class B shares through
dividend reinvestment. During the second year after the purchase you decided to
redeem $500 of your investment. Assuming at the time of the redemption the net
asset value had appreciated to $12 per share, the value of your Class B shares
would be $1,260 (105 shares at $12 per share). The CDSC would not be applied to
the value of the reinvested dividend shares and the amount which represents
appreciation ($260). Therefore, $240 of the $500 redemption proceeds ($500 minus
$260) would be charged at a rate of 4% (the applicable rate in the second year
after purchase) for a total CDSC of $9.60.
 
  For federal income tax purposes, the amount of the CDSC will reduce the gain
or increase the loss, as the case may be, on the amount recognized on the
redemption of shares.
 
  WAIVER OF THE CONTINGENT DEFERRED SALES CHARGES--CLASS B SHARES. The CDSC will
be waived in the case of a redemption following the death or disability of a
shareholder or, in the case of a trust account, following the death or
disability of the grantor. The waiver is available for total or partial
redemptions of shares owned by a person, either individually or in joint tenancy
(with rights of survivorship), or a trust at the time of death or initial
determination of disability, provided that the shares were purchased prior to
death or disability. In addition, the CDSC will be waived on redemptions of
shares held by a Trustee of the Fund.
 
  You must notify the Transfer Agent either directly or through Prudential
Securities or Prusec, at the time of redemption, that you are entitled to waiver
of the CDSC and provide the Transfer Agent with such supporting documentation as
it may deem appropriate. The waiver will be granted subject to confirmation of
your entitlement. See "Purchase and Redemption of Fund Shares--Waiver of the
Contingent Deferred Sales Charge--Class B Shares" in the Statement of Additional
Information.
 
  A quantity discount may apply to redemptions of Class B shares purchased prior
to August 1, 1994. See "Purchase and Redemption of Fund Shares--Quantity
Discount--Class B Shares Purchased Prior to August 1, 1994" in the Statement of
Additional Information.
 
  SYSTEMATIC WITHDRAWAL PLAN. The CDSC will be waived (or reduced) on certain
redemptions from a Systematic Withdrawal Plan. On an annual basis, up to 12% of
the total dollar amount subject to the CDSC may be redeemed without charge. The
Transfer Agent will calculate the total amount available for this waiver
annually, on the earlier of March 1, 1997 or the anniversary date of your
purchase. The CDSC will be waived (or reduced) on redemptions until this
threshold 12% amount is reached.
 
CONVERSION FEATURE--CLASS B SHARES
 
  Class B shares will automatically convert to Class A shares on a quarterly
basis approximately seven years after purchase. Conversions will be effected at
relative net asset value without the imposition of any additional sales charge.
The first conversion of Class B shares occurred in February 1995, when the
conversion feature was first implemented.
 
  Since the Fund tracks amounts paid rather than the number of shares bought on
each purchase of Class B shares, the number of Class B shares eligible to
convert to Class A shares (excluding shares acquired through the automatic
reinvestment of dividends and other distributions) (the Eligible Shares) will be
determined on each conversion date in accordance with the following formula: (i)
the ratio of (a) the amounts paid for Class B shares purchased at least seven
years prior to the conversion date to (b) the total amount paid for all Class B
shares purchased and then held in your account (ii) multiplied by the total
number
 
                                       43
<PAGE>
of Class B shares purchased and then held in your account. Each time any
Eligible Shares in your account convert to Class A shares, all shares or amounts
representing Class B shares then in your account that were acquired through the
automatic reinvestment of dividends and other distributions will convert to
Class A shares.
 
  For purposes of determining the number of Eligible Shares, if the Class B
shares in your account on any conversion date are the result of multiple
purchases at different net asset values per share, the number of Eligible Shares
calculated as described above will generally be either more or less than the
number of shares actually purchased approximately seven years before such
conversion date. For example, if 100 shares were initially purchased at $10 per
share (for a total of $1,000) and a second purchase of 100 shares was
subsequently made at $11 per share (for a total of $1,100), 95.24 shares would
convert approximately seven years from the initial purchase (I.E., $1,000
divided by $2,100 (47.62%), multiplied by 200 shares equals 95.24 shares). The
Manager reserves the right to modify the formula for determining the number of
Eligible Shares in the future as it deems appropriate on notice to shareholders.
 
  Since annual distribution-related fees are lower for Class A shares than Class
B shares, the per share net asset value of the Class A shares may be higher than
that of the Class B shares at the time of conversion. Thus, although the
aggregate dollar value will be the same, you may receive fewer Class A shares
than Class B shares converted. See "How the Fund Values its Shares."
 
  For purposes of calculating the applicable holding period for conversions, all
payments for Class B shares during a month will be deemed to have been made on
the last day of the month, or for Class B shares acquired through exchange, or a
series of exchanges, on the last day of the month in which the original payment
for purchases of such Class B shares was made. For Class B shares previously
exchanged for shares of a money market fund, the time period during which such
shares were held in the money market fund will be excluded. For example, Class B
shares held in a money market fund for one year will not convert to Class A
shares until approximately eight years from purchase. For purposes of measuring
the time period during which shares are held in a money market fund, exchanges
will be deemed to have been made on the last day of the month. Class B shares
acquired through exchange will convert to Class A shares after expiration of the
conversion period applicable to the original purchase of such shares.
 
  The conversion feature may be subject to the continuing availability of
opinions of counsel or rulings of the Internal Revenue Service (i) that the
dividends and other distributions paid on Class A, Class B, Class C and Class Z
shares will not constitute "preferential dividends" under the Internal Revenue
Code and (ii) that the conversion of shares does not constitute a taxable event.
The conversion of Class B shares into Class A shares may be suspended if such
opinions or rulings are no longer available. If conversions are suspended, Class
B shares of the Series will continue to be subject, possibly indefinitely, to
their higher annual distribution and service fee.
 
HOW TO EXCHANGE YOUR SHARES
 
  AS A SHAREHOLDER OF THE FUND, YOU HAVE AN EXCHANGE PRIVILEGE WITH THE OTHER
SERIES OF THE FUND AND CERTAIN OTHER PRUDENTIAL MUTUAL FUNDS (THE EXCHANGE
PRIVILEGE), INCLUDING ONE OR MORE SPECIFIED MONEY MARKET FUNDS, SUBJECT TO THE
MINIMUM INVESTMENT REQUIREMENTS OF SUCH FUNDS. CLASS A, CLASS B, CLASS C AND
CLASS Z SHARES MAY BE EXCHANGED FOR CLASS A, CLASS B, CLASS C AND CLASS Z
SHARES, RESPECTIVELY, OF THE OTHER SERIES OF THE FUND AND OF ANOTHER FUND ON THE
BASIS OF THE RELATIVE NAV. No sales charge will be imposed at the time of the
exchange. Any applicable CDSC payable upon the redemption of shares exchanged
will be calculated from the first day of the month after the initial purchase,
excluding the time shares were held in a money market fund. Class B and Class C
shares may not be exchanged into money market funds other than Prudential
Special Money Market Fund, Inc. For purposes of calculating the holding period
applicable to the Class B conversion feature, the time period during which Class
B shares were held in a money market fund will be excluded. See "Conversion
Feature--Class B Shares" above. An exchange will be treated as a redemption and
purchase for tax purposes. See "Shareholder Investment Account--Exchange
Privilege" in the Statement of Additional Information.
 
                                       44
<PAGE>
  IN ORDER TO EXCHANGE SHARES BY TELEPHONE, YOU MUST AUTHORIZE TELEPHONE
EXCHANGES ON YOUR INITIAL APPLICATION FORM OR BY WRITTEN NOTICE TO THE TRANSFER
AGENT AND HOLD SHARES IN NON-CERTIFICATE FORM. Thereafter, you may call the Fund
at (800) 225-1852 to execute a telephone exchange of shares, weekdays, except
holidays, between the hours of 8:00 A.M. and 6:00 P.M., New York time. For your
protection and to prevent fraudulent exchanges, your telephone call will be
recorded and you will be asked to provide your personal identification number. A
written confirmation of the exchange transaction will be sent to you. NEITHER
THE FUND NOR ITS AGENTS WILL BE LIABLE FOR ANY LOSS, LIABILITY OR COST WHICH
RESULTS FROM ACTING UPON INSTRUCTIONS REASONABLY BELIEVED TO BE GENUINE UNDER
THE FOREGOING PROCEDURES. All exchanges will be made on the basis of the
relative NAV of the two funds or two Series next determined after the request is
received in good order. The Exchange Privilege is available only in states where
the exchange may legally be made.
 
  IF YOU HOLD SHARES THROUGH PRUDENTIAL SECURITIES, YOU MUST EXCHANGE YOUR
SHARES BY CONTACTING YOUR PRUDENTIAL SECURITIES FINANCIAL ADVISER.
 
  IF YOU HOLD CERTIFICATES, THE CERTIFICATES, SIGNED IN THE NAME(S) SHOWN ON THE
FACE OF THE CERTIFICATES, MUST BE RETURNED IN ORDER FOR THE SHARES TO BE
EXCHANGED. SEE "HOW TO SELL YOUR SHARES" ABOVE.
 
  You may also exchange shares by mail by writing to Prudential Mutual Fund
Services LLC, Attention: Exchange Processing, P.O. Box 15010, New Brunswick, New
Jersey 08906-5010.
 
  IN PERIODS OF SEVERE MARKET OR ECONOMIC CONDITIONS THE TELEPHONE EXCHANGE OF
SHARES MAY BE DIFFICULT TO IMPLEMENT AND YOU SHOULD MAKE EXCHANGES BY MAIL BY
WRITING TO PRUDENTIAL MUTUAL FUND SERVICES LLC AT THE ADDRESS NOTED ABOVE.
 
  SPECIAL EXCHANGE PRIVILEGES. A special exchange privilege is available for
shareholders who qualify to purchase Class A shares at NAV (see "Alternative
Purchase Plan--Class A Shares--Reduction and Waiver of Initial Sales Charges"
above) and for shareholders who qualify to purchase Class Z shares (see
"Alternative Purchase Plan--Class Z Shares" above). Under this exchange
privilege, amounts representing any Class B and Class C shares (which are not
subject to a CDSC) held in such a shareholder's account will be automatically
exchanged for Class A shares for shareholders who qualify to purchase Class A
shares at NAV, on a quarterly basis, unless the shareholder elects otherwise.
Similarly, shareholders who qualify to purchase Class Z shares will have their
Class B and Class C shares which are not subject to a CDSC and their Class A
shares exchanged for Class Z shares on a quarterly basis. Eligibility for this
exchange privilege will be calculated on the business day prior to the date of
the exchange. Amounts representing Class B or Class C shares which are not
subject to a CDSC include the following: (1) amounts representing Class B or
Class C shares acquired pursuant to the automatic reinvestment of dividends and
distributions, (2) amounts representing the increase in the net asset value
above the total amount of payments for the purchase of Class B or Class C shares
and (3) amounts representing Class B or Class C shares held beyond the
applicable CDSC period. Class B and Class C shareholders must notify the
Transfer Agent either directly or through Prudential Securities or Prusec that
they are eligible for this special exchange privilege.
 
  Participants in any fee-based program for which the Fund is an available
option will have their Class A shares, if any, exchanged for Class Z shares when
they elect to have those assets become a part of the fee-based program. Upon
leaving the program (whether voluntarily or not), such Class Z shares (and, to
the extent provided for in the program, Class Z shares acquired through
participation in the program) will be exchanged for Class A shares at net asset
value.
 
  The Fund reserves the right to reject any exchange order including exchanges
(and market timing transactions) which are of the size and/or frequency engaged
in by one or more accounts acting in concert or otherwise, that have or may have
an adverse effect on the ability of the Subadviser to manage the portfolio. The
determination that such exchanges or activity may have an adverse effect and the
determination to reject any exchange order shall be in the discretion of the
Manager and the Subadviser.
 
  The Exchange Privilege is not a right and may be suspended, modified or
terminated on 60 days' notice to shareholders.
 
                                       45
<PAGE>
SHAREHOLDER SERVICES
 
  In addition to the Exchange Privilege, as a shareholder of the Fund, you can
take advantage of the following services and privileges:
 
  -AUTOMATIC REINVESTMENTS OF DIVIDENDS AND/OR DISTRIBUTIONS WITHOUT A SALES
CHARGE.  For your convenience, all dividends and distributions are automatically
reinvested in full and fractional shares of the Fund at NAV without a sales
charge. You may direct the Transfer Agent in writing not less than 5 full
business days prior to the record date to have subsequent dividends and/or
distributions sent in cash rather than reinvested. If you hold shares through
Prudential Securities, you should contact your financial adviser.
 
  -AUTOMATIC SAVINGS ACCUMULATION PLAN (ASAP).  Under ASAP, you may make regular
purchases of the Fund's shares in amounts as little as $50 via an automatic
debit to a bank account or Prudential Securities account (including a Command
Account). For additional information about this service, you may contact your
Prudential Securities financial adviser, Prusec representative or the Transfer
Agent directly.
 
  -SYSTEMATIC WITHDRAWAL PLAN.  A systematic withdrawal plan is available to
shareholders which provides for monthly or quarterly checks. Withdrawals of
Class B and Class C shares may be subject to a CDSC. See "How to Sell Your
Shares-- Contingent Deferred Sales Charges" above.
 
  -REPORTS TO SHAREHOLDERS.  The Fund will send you annual and semi-annual
reports. The financial statements appearing in annual reports are audited by
independent accountants. In order to reduce duplicate mailing and printing
expenses, the Fund will provide one annual and semi-annual shareholder report
and annual prospectus per household. You may request additional copies of such
reports by calling (800) 225-1852 or by writing to the Fund at Gateway Center
Three, Newark, New Jersey 07102. In addition, monthly unaudited financial data
is available upon request from the Fund.
 
  -SHAREHOLDER INQUIRIES.  Inquiries should be addressed to the Fund at Gateway
Center Three, Newark, New Jersey 07102, or by telephone, at (800) 225-1852
(toll-free) or, from outside the U.S.A., at (908) 417-7555 (collect).
 
  For additional information regarding the services and privileges described
above, see "Shareholder Investment Account" in the Statement of Additional
Information.
 
                                       46
<PAGE>
                        DESCRIPTION OF SECURITY RATINGS
 
MOODY'S INVESTORS SERVICE
BOND RATINGS
 
  AAA: Bonds that are rated Aaa are judged to be of the best quality. They carry
the smallest degree of investment risk and are generally referred to as "gilt
edge." Interest payments are protected by a large or by an exceptionally stable
margin and principal is secure. While the various protective elements are likely
to change, such changes as can be visualized are most unlikely to impair the
fundamentally strong position of such issues.
 
  AA: Bonds that are rated Aa are judged to be of high quality by all standards.
Together with the Aaa group they comprise what are generally known as high grade
bonds. They are rated lower than the best bonds because margins of protection
may not be as large as in Aaa securities or fluctuation of protective elements
may be of greater amplitude or there may be other elements present that make the
long-term risks appear somewhat larger than in Aaa securities.
 
  A: Bonds that are rated A possess many favorable investment attributes and are
to be considered as upper medium grade obligations. Factors giving security to
principal and interest are considered adequate, but elements may be present that
suggest a susceptibility to impairment some time in the future.
 
  BAA: Bonds that are rated Baa are considered as medium grade obligations I.E.,
they are neither highly protected nor poorly secured. Interest payments and
principal security appear adequate for the present but certain protective
elements may be lacking or may be characteristically unreliable over any great
length of time. Such bonds lack outstanding investment characteristics and in
fact have speculative characteristics as well.
 
  BA: Bonds that 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 that are rated B generally lack characteristics of the desirable
investment. Assurance of interest and principal payments or maintenance of other
terms of the contract over any long period of time may be small.
 
  Bonds rated within the Aa, A, Baa, Ba and B categories that Moody's believes
possess the strongest credit attributes within those categories are designated
by the symbols Aa1, A1, Baa1, Ba1 and B1.
 
  CAA: Bonds that are rated Caa are of poor standing. Such issues may be in
default or there may be present elements of danger with respect to principal or
interest.
 
  CA: Bonds that are rated Ca represent obligations that are speculative in a
high degree. Such issues are often in default or have other marked shortcomings.
 
  C: Bonds that are rated C are the lowest rated class of bonds, and issues so
rated can be regarded as having extremely poor prospects of ever attaining any
real investment standing.
 
SHORT-TERM DEBT RATINGS
 
  Moody's short-term debt ratings are opinions of the ability of issuers to
repay punctually senior debt obligations which have an original maturity not
exceeding one year.
 
                                      A-1
<PAGE>
  P-1: Issuers rated "Prime-1" or "P-1" (or supporting institutions) have a
superior ability for repayment of senior short-term debt obligations.
 
  P-2: Issuers rated "Prime-2" or "P-2" (or supporting institutions) have a
strong ability for repayment of senior short-term debt obligations.
 
  P-3: Issuers rated "Prime-3" or "P-3" (or supporting institutions) have an
acceptable ability for repayment of senior short-term debt obligations.
 
SHORT-TERM RATINGS
 
  Moody's ratings for tax-exempt notes and other short-term loans are designated
Moody's Investment Grade (MIG). This distinction is in recognition of the
differences between short-term and long-term credit risk.
 
  MIG 1: Loans bearing the designation MIG 1 are of the best quality. There is
present strong protection by established cash flows, superior liquidity support
or demonstrated broad-based access to the market for refinancing.
 
  MIG 2: Loans bearing the designation MIG 2 are of high quality. Margins of
protection are ample although not so large as in the preceding group.
 
  MIG 3: Loans bearing the designation MIG 3 are of favorable quality. All
security elements are accounted for but there is lacking the undeniable strength
of the preceding grades.
 
  MIG 4: Loans bearing the designation MIG 4 are of adequate quality. Protection
commonly regarded as required of an investment security is present and although
not distinctly or predominantly speculative, there is specific risk.
 
STANDARD & POOR'S RATINGS GROUP
DEBT RATINGS
 
  AAA: Debt rated AAA has the highest rating assigned by S&P. Capacity to pay
interest and repay principal is extremely strong.
 
  AA: Debt rated AA has a very strong capacity to pay interest and repay
principal and differs from the highest rated issues only in small degree.
 
  A: Debt rated A has a strong capacity to pay interest and repay principal,
although it is somewhat more susceptible to the adverse effects of changes in
circumstances and economic conditions than debt in higher-rated categories.
 
  BBB: Debt rated BBB is regarded as having an adequate capacity to pay interest
and repay principal. Whereas it normally exhibits adequate protection
parameters, adverse economic conditions or changing circumstances are more
likely to lead to a weakened capacity to pay interest and repay principal for
debt in this category than in higher-rated categories.
 
  BB, B, CCC, CC AND C: Debt rated BB, B, CCC, CC and C is regarded as having
predominantly speculative characteristics with respect to capacity to pay
interest and repay principal. BB indicates the least degree of speculation and C
the highest. While such debt will likely have some quality and protective
characteristics, these are outweighed by large uncertainties or major exposures
to adverse conditions.
 
  D: Debt rated D is in payment default. The D rating category is used when
interest payments or principal payments are not made on the date due, even if
the applicable grace period has not expired, unless S&P believes that such
payments will be made during such grace period.
 
                                      A-2
<PAGE>
COMMERCIAL PAPER RATINGS
 
  S&P's commercial paper ratings are current assessments of the likelihood of
timely payment of debt considered short-term in the relevant market.
 
  A-1: The A-1 designation indicates that the degree of safety regarding timely
payment is strong. Those issues determined to possess extremely strong safety
characteristics are denoted with a plus sign (+) designation.
 
  A-2: Capacity for timely payment on issues with the designation A-2 is
satisfactory. However, the relative degree of safety is not as high as for
issues designated A-1.
 
  A-3: Issues with the A-3 designation have adequate capacity for timely
payment. They are, however, more vulnerable to the adverse effects of changes in
circumstances than obligations carrying the higher designations.
 
MUNICIPAL NOTES
 
  A municipal note rating reflects the liquidity factors and market access risks
unique to notes. Notes maturing in three years or less will likely receive a
note rating. Notes maturing beyond three years will most likely receive a
long-term debt rating. Municipal notes are rated SP-1, SP-2 or SP-3. The
designation SP-1 indicates a very strong capacity to pay principal and interest.
Those issues determined to possess extremely strong characteristics are given a
plus (+) designation. An SP-2 designation indicates a satisfactory capacity to
pay principal and interest. An SP-3 designation indicates speculative capacity
to pay principal and interest.
 
                                      A-3
<PAGE>
                       THE PRUDENTIAL MUTUAL FUND FAMILY
 
  Prudential Investments Fund Management offers a broad range of mutual funds
designed to meet your individual needs. We welcome you to review the investment
options available through our family of funds. For more information on the
Prudential Mutual Funds, including charges and expenses, contact your Prudential
Securities financial adviser or Prusec representative or telephone the Funds at
(800) 225-1852 for a free prospectus. Read the prospectus carefully before you
invest or send money.
 
      TAXABLE BOND FUNDS
    -------------------------
Prudential Diversified Bond Fund, Inc.
Prudential Government Income Fund, Inc.
Prudential Government Securities Trust
  Short-Intermediate Term Series
Prudential High Yield Fund, Inc.
Prudential Mortgage Income Fund, Inc.
Prudential Structured Maturity Fund, Inc.
  Income Portfolio
The BlackRock Government Income Trust
 
      TAX-EXEMPT BOND FUNDS
    ----------------------------
Prudential California Municipal Fund
  California Series
  California Income Series
Prudential Municipal Bond Fund
  High Yield Series
  Insured Series
  Intermediate Series
Prudential Municipal Series Fund
  Florida Series
  Maryland Series
  Massachusetts Series
  Michigan Series
  New Jersey Series
  New York Series
  North Carolina Series
  Ohio Series
  Pennsylvania Series
Prudential National Municipals Fund, Inc.
 
      GLOBAL FUNDS
    -------------------
Prudential Europe Growth Fund, Inc.
Prudential Global Genesis Fund, Inc.
Prudential Global Limited Maturity Fund, Inc.
  Limited Maturity Portfolio
Prudential Intermediate Global Income Fund, Inc.
Prudential Natural Resources Fund, Inc.
Prudential Pacific Growth Fund, Inc.
Prudential World Fund, Inc.
  Global Series
  International Stock Series
The Global Government Plus Fund, Inc.
The Global Total Return Fund, Inc.
Global Utility Fund, Inc.
      EQUITY FUNDS
    -------------------
Prudential Allocation Fund
  Balanced Portfolio
  Strategy Portfolio
Prudential Distressed Securities Fund, Inc.
Prudential Dryden Fund
  Prudential Active Balance Fund
  Prudential Stock Index Fund
Prudential Emerging Growth Fund
Prudential Equity Fund, Inc.
Prudential Equity Income Fund
Prudential Jennison Series Fund, Inc.
  Prudential Jennison Growth Fund
  Prudential Jennison Growth & Income Fund
Prudential Multi-Sector Fund, Inc.
Prudential Small Company Value Fund, Inc.
Prudential Utility Fund, Inc.
Nicholas-Applegate Fund, Inc.
  Nicholas-Applegate Growth Equity Fund
 
      MONEY MARKET FUNDS
    --------------------------
- -TAXABLE MONEY MARKET FUNDS
Prudential Government Securities Trust
  Money Market Series
  U.S. Treasury Money Market Series
Prudential Special Money Market Fund, Inc.
  Money Market Series
Prudential MoneyMart Assets, Inc.
- -TAX-FREE MONEY MARKET FUNDS
Prudential Tax-Free Money Fund, Inc.
Prudential California Municipal Fund
  California Money Market Series
Prudential Municipal Series Fund
  Connecticut Money Market Series
  Massachusetts Money Market Series
  New Jersey Money Market Series
  New York Money Market Series
- -COMMAND FUNDS
Command Money Fund
Command Government Fund
Command Tax-Free Fund
- -INSTITUTIONAL MONEY MARKET FUNDS
Prudential Institutional Liquidity Portfolio, Inc.
  Institutional Money Market Series
  Liquid Assets Series
 
                                      B-1
<PAGE>
No dealer, sales representative or any 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 herein, and, if given or
made, such other information or representations must not be relied upon as
having been authorized by the Fund or the Distributor. This Prospectus does not
constitute an offer by the Fund or by the Distributor to sell or a solicitation
of any offer to buy any of the securities offered hereby in any jurisdiction to
any person to whom it is unlawful to make such offer in such jurisdiction.
                  -------------------------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
FUND HIGHLIGHTS......................................................         2
  What are the Series' Risk Factors and Special Characteristics?.....         2
FUND EXPENSES........................................................         4
FINANCIAL HIGHLIGHTS.................................................         6
HOW THE FUND INVESTS.................................................        18
  Investment Objectives and Policies.................................        18
  Hedging Strategies.................................................        24
  Other Investments and Policies.....................................        25
  Investment Restrictions............................................        28
HOW THE FUND IS MANAGED..............................................        28
  Manager............................................................        29
  Distributor........................................................        29
  Portfolio Transactions.............................................        31
  Custodian and Transfer and Dividend Disbursing Agent...............        32
HOW THE FUND VALUES ITS SHARES.......................................        32
HOW THE FUND CALCULATES PERFORMANCE..................................        32
TAXES, DIVIDENDS AND DISTRIBUTIONS...................................        33
GENERAL INFORMATION..................................................        35
  Description of Shares..............................................        35
  Additional Information.............................................        36
SHAREHOLDER GUIDE....................................................        37
  How to Buy Shares of the Fund......................................        37
  Alternative Purchase Plan..........................................        38
  How to Sell Your Shares............................................        41
  Conversion Feature--Class B Shares.................................        43
  How to Exchange Your Shares........................................        44
  Shareholder Services...............................................        46
DESCRIPTION OF SECURITY RATINGS......................................       A-1
THE PRUDENTIAL MUTUAL FUND FAMILY....................................       B-1
</TABLE>
 
                ------------------------------------------------
 
MF133A                                                                   4441470
 
CUSIP Nos.:
                                          Class A: 74435L103; Class B: 74435L202
High Yield Series                          Class C: 74435L707 Class Z: 74435L871
                                          Class A: 74435L301; Class B: 74435L400
Insured Series                             Class C: 74435L806 Class Z: 74435L863
                                          Class A: 74435L509; Class B: 74435L608
Intermediate Series                        Class C: 74435L889 Class Z: 74435L855
 
PRUDENTIAL
MUNICIPAL BOND
FUND
- -------------------
 
                                  [PROSPECTUS]
                                                                         JULY 2,
                                                                            1997
 
                               HIGH YIELD SERIES
                                 INSURED SERIES
                              INTERMEDIATE SERIES
 
                                     [LOGO]


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission