VAN KAMPEN AMERICAN CAPITAL HIGH INCOME CORPORATE BOND FUND
497, 1995-12-29
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<PAGE>   1
 
- --------------------------------------------------------------------------------
                          VAN KAMPEN AMERICAN CAPITAL
                        HIGH INCOME CORPORATE BOND FUND
- --------------------------------------------------------------------------------
 
    Van Kampen American Capital High Income Corporate Bond Fund, formerly known
as American Capital High Yield Investments, Inc. (the "Fund"), is a mutual fund
seeking as its primary objective maximum current income. Capital appreciation is
a secondary objective which is sought only when consistent with the primary
objective. The Fund attempts to achieve these investment objectives by investing
primarily in high yielding high risk fixed-income securities. SUCH SECURITIES
ARE REGARDED BY THE RATING AGENCIES AS SPECULATIVE WITH RESPECT TO THE ISSUER'S
CONTINUING ABILITY TO MEET PRINCIPAL AND INTEREST PAYMENTS. See "Investment
Objectives and Policies--Risk Factors of Investing in Lower Rated Debt
Securities."
 
    The Fund's investment adviser is Van Kampen American Capital Asset
Management, Inc. This Prospectus sets forth certain information that a
prospective investor should know before investing in the Fund. Please read it
carefully and retain it for future reference. The address of the Fund is 2800
Post Oak Blvd., Houston, Texas 77056, and its telephone number is (800)
421-5666.
                             ---------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR STATE REGULATORS NOR HAS THE COMMISSION OR STATE
REGULATORS PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                             ---------------------
 
    SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY BANK OR DEPOSITORY INSTITUTION; FURTHER, SUCH SHARES ARE NOT
FEDERALLY INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. SHARES OF THE FUND INVOLVE
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
    A Statement of Additional Information, dated December 27, 1995, containing
additional information about the Fund, has been filed with the Securities and
Exchange Commission ("SEC") and is hereby incorporated by reference into this
Prospectus. A copy of the Statement of Additional Information may be obtained
without charge by calling (800) 421-5666 or, for Telecommunications Device For
the Deaf, (800) 772-8889.
                               ------------------
                         VAN KAMPEN AMERICAN CAPITAL SM
                               ------------------
                  THIS PROSPECTUS IS DATED DECEMBER 27, 1995.
<PAGE>   2
 
- ------------------------------------------------------------------------------
                               TABLE OF CONTENTS
- ------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                   PAGE
                                                                   ---
<S>                                                                <C>
Prospectus Summary...............................................    3
Shareholder Transaction Expenses.................................    5
Annual Fund Operating Expenses and Example.......................    6
Financial Highlights.............................................    8
The Fund.........................................................   10
Investment Objectives and Policies...............................   10
Investment Practices.............................................   16
Investment Advisory Services.....................................   20
Alternative Sales Arrangements...................................   22
Purchase of Shares...............................................   25
Shareholder Services.............................................   35
Redemption of Shares.............................................   39
Distribution Plans...............................................   43
Distributions from the Fund......................................   45
Tax Status.......................................................   46
Fund Performance.................................................   47
Description of Shares of the Fund................................   50
Additional Information...........................................   50
Appendix -- Description of Bond Ratings..........................   52
</TABLE>
 
  NO DEALER, SALESPERSON 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 IN THIS PROSPECTUS AND, IF
GIVEN OR MADE, SUCH OTHER INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON
AS HAVING BEEN AUTHORIZED BY THE FUND, THE ADVISER OR THE DISTRIBUTOR. THIS
PROSPECTUS DOES NOT CONSTITUTE AN OFFER BY THE FUND OR BY THE DISTRIBUTOR TO
SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF THE SECURITIES OFFERED HEREBY
IN ANY JURISDICTION TO ANY PERSON TO WHOM IT IS UNLAWFUL FOR THE FUND TO MAKE
SUCH AN OFFER IN SUCH JURISDICTION.
 
                                        2
<PAGE>   3
 
- ------------------------------------------------------------------------------
                               PROSPECTUS SUMMARY
- ------------------------------------------------------------------------------
 
THE FUND. Van Kampen American Capital High Income Corporate Bond Fund (the
"Fund") is a diversified, open-end management investment company organized as a
Delaware business trust.
 
MINIMUM PURCHASE. $500 minimum initial investment and $25 minimum for each
subsequent investment (or less as described under "Purchase of Shares").
 
INVESTMENT OBJECTIVES. Maximize current income with a secondary objective of
capital appreciation.
 
INVESTMENT POLICY. Investing at least 80% of the Fund's total assets in a
diversified portfolio of high yielding, high risk corporate debt securities and
preferred stocks. The Fund may, from time to time, purchase common stocks and
other equity securities and non-income producing securities.
 
INVESTMENT RESULTS. The investment results of the Fund are shown in the
"Financial Highlights" table.
 
ALTERNATIVE SALES ARRANGEMENTS. The Fund offers three classes of shares to the
general public, each with its own sales charge structure: Class A shares, Class
B shares and Class C shares. Each class has distinct advantages and
disadvantages for different investors, and investors may choose the class of
shares that best suits their circumstances and objectives. See "Alternative
Sales Arrangements -- Factors for Consideration." Each class of shares
represents an interest in the same portfolio of investments of the Fund. The per
share dividends on Class B and Class C shares will be lower than the per share
dividends on Class A shares. See 'Alternative Sales Arrangements." For
information on redeeming shares see "Redemption of Shares."
 
  Class A Shares. These shares are offered at net asset value per share plus a
maximum initial sales charge of 4.75% of the offering price. Investments of $1
million or more are not subject to any sales charge at the time of purchase, but
a contingent deferred sales charge of one percent may be imposed on certain
redemptions made within one year of purchase. The Fund pays an annual service
fee of up to 0.25% of its average daily net assets attributable to such class of
shares. See "Purchase of Shares -- Class A Shares" and "Distribution Plans."
 
  Class B Shares. These shares are offered at net asset value per share and are
subject to a maximum contingent deferred sales charge of four percent of
redemption proceeds during the first and second year, declining each year
thereafter to zero after the fifth year. See "Redemption of Shares." The Fund
pays a combined annual distribution fee and service fee of up to one percent of
its average daily net assets attributable to such class of shares. See "Purchase
of Shares -- Class B Shares" and "Distribution Plans." Class B shares will
convert automatically to
 
                                        3
<PAGE>   4
 
Class A shares six years after the end of the calendar month in which the
shareholder's order to purchase was accepted. See "Alternative Sales
Arrangements -- Conversion Feature."
 
  Class C Shares. These shares are offered at net asset value per share and are
subject to a contingent deferred sales charge of one percent on redemptions made
within one year of purchase. See "Redemption of Shares." The Fund pays a
combined annual distribution fee and service fee of up to one percent of its
average daily net assets attributable to such class of shares. See "Purchase of
Shares -- Class C Shares" and "Distribution Plans." Class C shares will convert
automatically to Class A shares ten years after the end of the calendar month in
which the shareholder's order to purchase was accepted. See "Alternative Sales
Arrangements -- Conversion Feature."
 
DISTRIBUTIONS FROM THE FUND. Income dividends are distributed monthly. All
dividends and distributions are automatically reinvested in shares of the Fund
at net asset value per share (without sales charge) unless payment in cash is
requested. See "Distributions from the Fund."
 
INVESTMENT ADVISER. Van Kampen American Capital Asset Management, Inc. (the
"Adviser") is the investment adviser to the Fund.
 
DISTRIBUTOR. Van Kampen American Capital Distributors, Inc. (the "Distributor").
 
RISK FACTORS. The lower rated debt securities in which the Fund may invest are
regarded as predominantly speculative with respect to the issuer's continuing
ability to meet principal and interest payments. Because investment in lower
rated securities (commonly referred to as junk bonds) involves greater
investment risk, achievement of the Fund's investment objectives may be more
dependent on the investment adviser's credit analysis than would be the case if
the Fund were investing in higher rated securities. Lower rated securities may
be more susceptible to real or perceived adverse economic and competitive
industry conditions than investment grade securities and thus be subject to
greater risk. A projection of an economic downturn, for example, could cause a
decline in lower rated securities prices because the advent of a recession could
lessen the ability of a highly leveraged company to make principal and interest
payments on its debt securities. In addition, the secondary trading market for
lower rated securities may be less liquid than the market for higher grade
securities. The market prices of debt securities also generally fluctuate with
changes in interest rates so that the Fund's net asset value can be expected to
decrease as long-term interest rates rise and to increase as long-term interest
rates fall. The above risks may be increased by investments in debt securities
not producing immediate cash income, such as zero-coupon securities. See
"Investment Objectives and Policies." The Fund may seek to hedge investments
through transactions in options, futures contracts and related
 
                                        4
<PAGE>   5
 
options. Such transactions involve certain risks. See "Investment Practices --
Options, Futures Contracts and Related Options."
 
  The above is qualified in its entirety by reference to the more detailed
information appearing elsewhere in this Prospectus.
 
- ------------------------------------------------------------------------------
SHAREHOLDER TRANSACTION EXPENSES
- ------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                  CLASS A        CLASS B         CLASS C
                                  SHARES         SHARES          SHARES
                                 ---------  ----------------- -------------
<S>                              <C>        <C>               <C>
Maximum sales charge imposed on
  purchases (as a percentage of
  offering price)...............   4.75%(1)       None            None
Maximum sales charge imposed on
  reinvested dividends (as a
  percentage of offering
  price)........................    None          None            None
Deferred sales charge (as a
  percentage of the lesser of
  original purchase price or
  redemption proceeds)..........    None(2)   Year 1--4.00%   Year 1--1.00%
                                              Year 2--4.00%
                                              Year 3--3.00%
                                              Year 4--2.50%
                                              Year 5--1.50%
                                               After--None
Redemption fees (as a percentage
  of amount redeemed)...........    None          None            None
Exchange fee....................    None          None            None
</TABLE>
 
- ---------------
(1) Reduced for purchases of $100,000 and over. See "Purchase of Shares -- Class
    A Shares."
 
(2) Investments of $1 million or more are not subject to any sales charge at the
    time of purchase, but a contingent deferred sales charge of one percent may
    be imposed on certain redemptions made within one year of the purchase.
 
                                        5
<PAGE>   6
 
- ------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES AND EXAMPLE
- ------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                           CLASS A     CLASS B     CLASS C
                                           SHARES      SHARES      SHARES
                                          ---------   ---------   ---------
<S>                                       <C>         <C>         <C>
Management fees (as a percentage of
  average daily net assets).............    0.55%       0.55%       0.55%
12b-1 Fees(3) (as a percentage of
  average daily net assets).............    0.20%       1.00%(5)    1.00%(5)
Other Expenses(4) (as a percentage of
  average daily net assets).............    0.37%       0.38%       0.38%
Total Fund Operating Expenses (as a
  percentage of average daily net
  assets)...............................    1.12%       1.93%       1.93%
</TABLE>
 
- ---------------
(3) Up to 0.25% for Class A shares and one percent for Class B and C shares. See
    "Distribution Plans."
 
(4) See "Investment Advisory Services."
 
(5) Long-term shareholders may pay more than the economic equivalent of the
    maximum front-end sales charges permitted by NASD Rules.
 
                                        6
<PAGE>   7
 
<TABLE>
<CAPTION>
                                             ONE    THREE    FIVE    TEN
EXAMPLE:                                     YEAR   YEARS   YEARS   YEARS
                                            ------  ------  ------  ------
<S>                                         <C>     <C>     <C>     <C>
You would pay the following expenses on a
 $1,000 investment, assuming (i) an
 operating expense ratio of 1.12% for
 Class A shares, 1.93% for Class B shares
 and 1.93% for Class C shares, (ii) a 5%
 annual return and (iii) redemption at the
 end of each time period:
    Class A...............................   $ 58    $ 81    $106    $177
    Class B...............................   $ 61    $ 93    $122    $185*
    Class C...............................   $ 30    $ 61    $104    $225
You would pay the following expenses on
  the same $1,000 investment assuming no
  redemption at the end of each time
  period:
    Class A...............................   $ 58    $ 81    $106    $177
    Class B...............................   $ 20    $ 61    $104    $185*
    Class C...............................   $ 20    $ 61    $104    $225
</TABLE>
 
- ------------------------------------------------------------------------------
* Based on conversion to Class A shares after six years.
 
  The purpose of the foregoing tables is to assist an investor in understanding
the various costs and expenses that an investor in the Fund will bear directly
or indirectly. The "Example" reflects expenses based on the "Annual Fund
Operating Expenses" table as shown above carried out to future years and are
included to provide a means for the investor to compare expense levels of funds
with different fee structures over varying investment periods. To facilitate
such comparison, all funds are required to utilize a five percent annual return
assumption. Class B shares acquired through the exchange privilege are subject
to the deferred sales charge schedule relating to the Class B shares of the fund
from which the purchase of Class B shares was originally made. Accordingly,
future expenses as projected could be higher than those determined in the above
table if the investor's Class B shares were exchanged from a fund with a higher
contingent deferred sales charge. THE INFORMATION CONTAINED IN THE ABOVE TABLE
SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE EXPENSES AND ACTUAL
EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN. For a more complete
description of such costs and expenses, see "Purchase of Shares," "Investment
Advisory Services" and "Redemption of Shares."
 
                                        7
<PAGE>   8
 
- --------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
  (Selected data for a share of beneficial interest outstanding throughout each
of the periods indicated)
 
  The following information for each of the last five years has been audited by
Price Waterhouse LLP, independent accountants, whose report thereon was
unqualified. This information should be read in conjunction with the related
financial statements and notes thereto included in the Statement of Additional
Information.
<TABLE>
<CAPTION>
                                                                                        CLASS A
                                                    -------------------------------------------------------------------------------
                                                                                 YEAR ENDED AUGUST 31
                                                    -------------------------------------------------------------------------------
                                                      1995       1994       1993       1992       1991         1990         1989
                                                    --------   --------   --------   --------   ---------   ----------   ----------
<S>                                                 <C>        <C>        <C>        <C>        <C>         <C>          <C>
PER SHARE OPERATING PERFORMANCE
Net asset value, beginning of period...............   $6.12      $6.61      $6.40      $5.71      $5.78       $7.96        $9.09
                                                    --------   --------   --------   --------   ---------   ----------   ----------
INCOME FROM INVESTMENT OPERATIONS
 Investment income.................................     .62        .71        .71        .79        .86        1.00         1.22
 Expenses..........................................    (.07)      (.08)      (.07)     (.065)      (.06)       (.07)        (.07)
                                                    --------   --------   --------   --------   ---------   ----------   ----------
Net investment income..............................     .55        .63        .64        .725       .80         .93         1.15
Net realized and unrealized gain or loss on
 securities........................................    .0515      (.47)       .27       .6775      (.055)     (2.165)      (1.0775)
                                                    --------   --------   --------   --------   ---------   ----------   ----------
Total from investment operations...................    .6015       .16        .91      1.4025       .745      (1.235)        .0725
                                                    --------   --------   --------   --------   ---------   ----------   ----------
LESS DISTRIBUTIONS FROM
 Net investment income.............................  (.5715)      (.65)      (.70)    (.7125)      (.815)      (.945)      (1.2025)
 Net realized gain on securities...................    --         --         --         --         --           --           --
                                                    --------   --------   --------   --------   ---------   ----------   ----------
Total distributions................................  (.5715)      (.65)      (.70)    (.7125)      (.815)      (.945)      (1.2025)
                                                    --------   --------   --------   --------   ---------   ----------   ----------
Net asset value, end of period.....................   $6.15      $6.12      $6.61      $6.40      $5.71       $5.78        $7.96
                                                    =========  =========  =========  =========  ==========  ===========  ===========
TOTAL RETURN (4)...................................   10.48%      2.34%     15.20%     25.82%     15.66%     (15.88%)        .81%
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (millions)............... $411.9     $364.2     $452.4     $435.1     $341.9      $331.4       $554.4
Ratios to average net assets
 Expenses..........................................    1.12%      1.10%      1.09%      1.05%      1.06%       1.02%         .77%
 Net investment income.............................    9.23%      9.03%     10.10%     11.77%     15.20%      14.23%       13.27%
Portfolio turnover rate............................      49%        66%        75%        73%       114%         59%          45%
 
<CAPTION>
 
                                                    -------------------------------------
                                                                                 YEAR ENDED AUGUST 31
                                                    -------------------------------------------------------------
                                                      1995       1994       1993       1992       1991         1990   1988    1987
1986 (3)
                                                    --------   --------   --------   --------   ---------   ----------   ----------
 
                                                     ---------   ----------   ----------
<S>                                                 <<C>         <C>          <C>
PER SHARE OPERATING PERFORMANCE
Net asset value, beginning of period...............    $9.86      $10.02       $10.21
                                                     ---------   ----------   ----------
INCOME FROM INVESTMENT OPERATIONS
 Investment income.................................     1.27        1.27         1.35
 Expenses..........................................     (.07)       (.07)        (.07)
                                                     ---------   ----------   ----------
Net investment income..............................     1.20        1.20         1.28
Net realized and unrealized gain or loss on
 securities........................................    (.7025)      (.12)        (.1375)
                                                     ---------   ----------   ----------
Total from investment operations...................      .4975      1.08         1.1425
                                                     ---------   ----------   ----------
LESS DISTRIBUTIONS FROM
 Net investment income.............................   (1.2675)     (1.23)       (1.3325)
 Net realized gain on securities...................     --          (.01)         --
                                                     ---------   ----------   ----------
Total distributions................................   (1.2675)     (1.24)       (1.3325)
                                                     ---------   ----------   ----------
Net asset value, end of period.....................    $9.09       $9.86       $10.02
                                                     ==========  ===========  ===========
TOTAL RETURN (4)...................................     6.32%      11.45%       11.46%
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (millions)...............  $582.6      $578.8       $535.3
Ratios to average net assets
 Expenses..........................................      .73%        .69%         .66%
 Net investment income.............................    13.14%      12.19%       12.23%
Portfolio turnover rate............................       58%         66%          86%
</TABLE>
 
                                             (Table continued on following page)
 
                                        8
<PAGE>   9
 
- --------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS -- (CONTINUED)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                    CLASS B
                                                           ----------------------------------------------------------
                                                                   YEAR ENDED AUGUST 31             JULY 2, 1992 (1)
                                                           ------------------------------------    THROUGH AUGUST 31,
                                                               1995          1994      1993 (2)         1992 (2)
                                                           ------------    --------    --------    ------------------
<S>                                                        <C>             <C>         <C>         <C>
PER SHARE OPERATING PERFORMANCE
Net asset value, beginning of period....................     $  6.14         $6.63       $6.41          $  6.33
                                                           ------------    --------    --------       ------
INCOME FROM INVESTMENT OPERATIONS
 Investment income......................................         .63           .71         .70              .11
 Expenses...............................................        (.12)         (.13)       (.12)            (.02)
                                                           ------------    --------    --------       ------
Net investment income...................................         .51           .58         .58              .09
Net realized and unrealized gain or loss on
 securities.............................................        (.0335)      (.468)        .292             .097
                                                           ------------    --------    --------       ------
Total from investment operations........................         .5435         .112        .872             .187
                                                           ------------    --------    --------       ------
Less distributions from net investment income...........        (.5235)      (.602)      (.652)            (.107)
                                                           ------------    --------    --------       ------
Net asset value, end of period..........................     $  6.16         $6.14       $6.63          $  6.41
                                                           =============   =========   =========   ===================
TOTAL RETURN (4)........................................        9.41%         1.59%      14.49%            2.97%
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (millions)....................    $89.9          $71.0       $37.7            $3.1
Ratios to average net assets (annualized)
 Expenses...............................................        1.93%         1.90%       1.90%            2.08%
 Net investment income..................................        8.42%         8.25%       9.10%           10.30%
Portfolio turnover rate.................................          49%           66%         75%              73%
 
<CAPTION>
                                                                              CLASS C
                                                          ------------------------------------------------
 
                                                                  YEAR ENDED
                                                                  AUGUST 31,             JULY 6, 1993 (1)
                                                          --------------------------    THROUGH AUGUST 31,
                                                              1995         1994 (2)          1993 (2)
                                                          ------------    ----------    ------------------
<S>                                                        <C>            <C>           <C>
PER SHARE OPERATING PERFORMANCE
Net asset value, beginning of period....................    $  6.11        $  6.61           $ 6.63
                                                          ------------    ----------     -------
INCOME FROM INVESTMENT OPERATIONS
 Investment income......................................        .63            .65              .08
 Expenses...............................................       (.12)          (.12)            (.02)
                                                          ------------    ----------     -------
Net investment income...................................        .51            .53              .06
Net realized and unrealized gain or loss on
 securities.............................................        .0435         (.428)            .0195
                                                          ------------    ----------     -------
Total from investment operations........................        .5535          .102             .0795
                                                          ------------    ----------     -------
Less distributions from net investment income...........       (.5235)        (.602)           (.0995)
                                                          ------------    ----------     -------
Net asset value, end of period..........................    $  6.14        $  6.11           $ 6.61
                                                          =============   ===========   ===================
TOTAL RETURN (4)........................................       9.63%          1.43%            1.20%
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (millions)....................   $15.7          $13.2             $1.0
Ratios to average net assets (annualized)
 Expenses...............................................       1.93%          1.91%            2.34%
 Net investment income..................................       8.42%          8.25%            8.05%
Portfolio turnover rate.................................         49%            66%              75%
</TABLE>
 
- ------------
 
(1) Commencement of offering of sales.
 
(2) Based on the average month-end shares outstanding.
 
(3) Effective for the year ended August 31, 1987, the Fund adopted for financial
    reporting purposes an accounting method of amortizing debt discounts and
    premiums on the same basis as is used for federal income tax reporting. The
    effect of the change in accounting method, on a pro forma basis, would have
    been to increase net investment income with a corresponding decrease in net
    realized and unrealized gains or losses in the amounts of $.02 for the year
    1986. Similarly, the ratio of net investment income to average net assets
    would have been 12.38%.
 
(4) Total return for periods of less than one full year are not annualized.
    Total return does not consider the effect of sales charges.
 
                                        9
<PAGE>   10
 
- ------------------------------------------------------------------------------
THE FUND
- ------------------------------------------------------------------------------
 
  The Fund is an open-end, diversified management investment company. This type
of company is commonly known as a mutual fund. A mutual fund provides, for those
who have similar investment goals, a practical and convenient way to invest in a
diversified portfolio of securities by combining their resources in an effort to
achieve such goals.
 
  Fourteen Trustees have the responsibility for overseeing the affairs of the
Fund. The Adviser, 2800 Post Oak Boulevard, Houston, Texas 77056, determines the
investment of the Fund's assets, provides administrative services and manages
the Fund's business and affairs. The Adviser together with its predecessors, has
been in the investment advisory business since 1926.
 
- ------------------------------------------------------------------------------
INVESTMENT OBJECTIVES AND POLICIES
- ------------------------------------------------------------------------------
 
  The Fund's primary objective is to maximize current income. Capital
appreciation is a secondary objective which will be sought only when consistent
with its primary objective. The Fund attempts to achieve these investment
objectives by investing in high yielding fixed-income securities (commonly
referred to as junk bonds), which are subject to high risk as described below.
Fixed-income securities appropriate for the Fund may include both convertible
and non-convertible debt securities and preferred stocks. The Fund's investment
objectives may be changed by the Fund's Trustees without shareholder approval,
but no change is anticipated. If there is a change in investment objectives,
shareholders should consider whether the Fund remains an appropriate investment
in light of their then current financial position and needs. There is no
assurance that these objectives will be achieved and yields may fluctuate over
time.
 
  The Fund generally invests at least 80% of its total assets in fixed-income
securities rated Baa or lower by Moody's Investors Service ("Moody's"), or BBB
or lower by Standard & Poor's Corporation ("S&P"). In addition, under normal
circumstances, at least 65% of the total assets of the Fund are invested in
corporate bonds. For these purposes a corporate bond is defined as any corporate
debt security with an original term to maturity of greater than one year. See
the Appendix for a description of corporate bond ratings. Since some issuers do
not seek ratings for their securities, nonrated securities are also considered
for investment by the Fund.
 
  In general, the prices of debt securities vary inversely with interest rates.
If interest rates rise, debt security prices generally fall; if interest rates
fall, debt security prices generally rise. In addition, for a given change in
interest rates, longer-maturity debt securities fluctuate more in price (gaining
or losing more in
 
                                       10
<PAGE>   11
 
value) than shorter-maturity debt securities, and generally offer higher yields
than shorter-maturity debt securities, all other factors, including credit
quality, being equal. This potential for a decline in prices of debt securities
due to rising interest rates is referred to herein as "market risk." While the
Fund has no policy limiting the maturities of the debt securities in which it
may invest, the Adviser seeks to moderate market risk by generally maintaining a
portfolio duration within a range of two to six years. Duration is a measure of
the expected life of a debt security that was developed as a more precise
alternative to the concept of "term to maturity." Duration incorporates a debt
security's yield, coupon interest payments, final maturity and call features
into one measure.
 
  Traditionally a debt security's "term to maturity" has been used as a proxy
for the sensitivity of the security's price to changes in interest rates (which
is the "interest rate risk" or "price volatility" of the security). However,
"term to maturity" measures only the time until a debt security provides its
final payment taking no account of the pattern of the security's payments of
interest or principal prior to maturity. Duration is a measure of the expected
life of a debt security on a present value basis expressed in years. It measures
the length of the time interval between the present and the time when the
interest and principal payments are scheduled (or in the case of a callable
bond, expected to be received), weighing them by the present value of the cash
to be received at each future point in time. For any debt security with interest
payments occurring prior to the payment of principal, duration is always less
than maturity, and for zero coupon issues, duration and "term to maturity" are
equal. In general, the lower the coupon rate of interest or the longer the
maturity, or the lower the yield-to-maturity of a debt security, the longer its
duration; conversely, the higher the coupon rate of interest, the shorter the
maturity or the higher the yield-to-maturity of a debt security, the shorter its
duration.
 
  There are some situations where even the standard duration calculation does
not properly reflect the interest rate exposure of a security. For example,
floating and variable rate securities often have final maturities of ten or more
years; however, their interest rate exposure corresponds to the frequency of the
coupon reset. Another example where the interest rate exposure is not properly
captured by duration is the case of mortgage pass-through securities. The stated
final maturity of such securities is generally 30 years, but current prepayment
rates are more critical in determining the securities' interest rate exposure.
In these and other similar situations, the Adviser will use more sophisticated
analytical techniques that incorporate the economic life of a security into the
determination of its interest rate exposure. At August 31, 1995, the average
maturity of the debt securities owned by the Fund was approximately 7.87 years
and the duration of the portfolio was approximately 4.84 years. The duration is
likely to vary from time to time as the Adviser pursues its strategy of striving
to maintain an active balance between seeking to maximize income and endeavoring
to maintain the value of the Fund's
 
                                       11
<PAGE>   12
 
capital. Thus, the objective of providing high current return to shareholders is
tempered by seeking to avoid undue market risk and thus provide reasonable total
return as well as high distributed return. There is, of course, no assurance
that the Adviser will be successful in achieving such results for the Fund.
 
  The higher yields sought by the Fund are generally obtainable from securities
rated in the lower categories by recognized rating services. These securities
generally are subordinated to the prior claims of banks and other senior
lenders. The lower rated debt securities in which the Fund may invest are
regarded as predominately speculative with respect to the issuers continuing
ability to meet principal and interest payments. The ratings of Moody's and S&P
represent their opinions of the quality of the debt securities they undertake to
rate, but not the market value risk of such securities. It should be emphasized,
however, that ratings are general and are not absolute standards of quality.
Consequently, debt securities with the same maturity, coupon and rating may have
different yields while debt securities of the same maturity and coupon with
different ratings may have the same yield.
 
  During the fiscal year ended August 31, 1995, the average percentage of the
Fund's assets invested in debt securities within the various rating categories
(based on the higher of the S&P or Moody's ratings), and the nonrated debt
securities, determined on a dollar weighted average, were as follows:

<TABLE>
- ------------------------------------------------------------------------------
<S>                                                             <C>
BBB/Baa.......................................................    1.76%
BB/Ba.........................................................   14.01%
B.............................................................   65.45%
CCC/Caa.......................................................    2.68%
*Nonrated.....................................................    6.45%
Preferred Stocks..............................................    1.46%
Common Stocks/Warrants........................................    0.68%
Cash and Equivalents..........................................    7.51%
                                                                -------
         Total Net Assets.....................................     100%
- ------------------------------------------------------------------------------
</TABLE>
 
* The nonrated securities and private placements as a percentage of total net
  assets were considered by the Adviser to be comparable to securities rated by
  Moody's as follows: BB--0.28%; B--5.80%; and CCC--0.37%.
 
  LOWER RATED DEBT SECURITIES. The securities in which the Fund may invest
include the following:
 
    -- Straight fixed-income debt securities. These include bonds and other debt
  obligations which bear a fixed or variable rate of interest payable at regular
  intervals and have a fixed or resettable maturity date. The particular terms
  of such securities vary and may include features such as call provisions and
  sinking funds.
 
    -- Pay-in-kind debt securities. These pay interest in additional debt
  securities rather than cash.
 
                                       12
<PAGE>   13
 
    -- Zero-coupon debt securities. These bear no interest obligation but are
  issued at a discount from their value at maturity. When held to maturity,
  their entire return equals the difference between their issue price and their
  maturity value.
 
    -- Zero-fixed-coupon debt securities. These are zero-coupon debt securities
  which convert on a specified date to interest-bearing debt securities.
 
  The Fund may invest in debt instruments not producing immediate cash income,
such as zero-coupon securities, when their effective yield premiums over
comparable instruments producing cash income make these investments attractive.
Prices on non-cash-paying instruments may be more sensitive to changes in the
issuer's financial condition, fluctuations in interest rates and market
demand/supply imbalances than cash-paying securities with similar credit
ratings, and thus may be more speculative. In addition, the non-cash interest
income earned on such instruments is included in investment company taxable
income, thereby increasing the minimum required distributions to shareholders
(without providing the corresponding cash flow with which to pay such
distributions). See "Distributions from the Fund." The Adviser will weigh these
concerns against the expected total returns for such instruments.
 
  The Fund may invest in debt securities rated below B by both Moody's and S&P,
common stocks or other equity securities and income bonds on which interest is
not being paid when such investments are consistent with the Fund's investment
objectives or are acquired as part of a unit consisting of a combination of
fixed-income or equity securities. Equity securities as referred to herein do
not include preferred stocks. The Fund will not purchase any such securities
which will cause more than 20% of its total assets to be so invested or which
would cause more than 10% of its total assets to be invested in common stocks,
warrants and options on equity securities. This limitation does not require the
sale of a portfolio security whose rating has been changed.
 
  Debt securities rated below B by both Moody's and S&P include debt obligations
or other securities of companies that are financially troubled, in default or
are in bankruptcy or reorganization ("Deep Discount Securities"). These
securities may be rated C, CI or D by S&P and C by Moody's. Debt obligations of
such companies are usually available at a deep discount from the face value of
the instrument. The Fund will invest in Deep Discount Securities when the
Adviser believes that existing factors are likely to restore the company to a
healthy financial condition. Such factors include a restructuring of debt,
management changes, existence of adequate assets, or other unusual
circumstances.
 
  A debt instrument purchased at a deep discount may currently pay a very high
effective yield. In addition, if the financial condition of the issuer improves,
the underlying value of the security may increase, resulting in a capital gain.
If the
 
                                       13
<PAGE>   14
 
company defaults on its obligations or remains in default, or if the plan of
reorganization is insufficient for debtholders, the Deep Discount Securities may
stop generating income and lose value or become worthless. The Adviser will
balance the benefits of Deep Discount Securities with their risks. While a
diversified portfolio may reduce the overall impact of a Deep Discount Security
that is in default or loses its value, the risk cannot be eliminated.
 
  OTHER INVESTMENTS. The Fund may invest up to 20% of its total assets in United
States currency denominated debt issues of foreign governments and other foreign
issuers. See "Investment Practices -- Securities of Foreign Issuers." In order
to hedge against changes in interest rates, the Fund may invest in or write
options on U.S. Government securities and engage in transactions involving
interest rate futures contracts and options on such contracts. See "Investment
Practices -- Options, Futures Contracts and Related Options" and the Statement
of Additional Information for discussion of options, futures contracts and
related options.
 
  When market conditions dictate a more "defensive" investment strategy, the
Fund may invest on a temporary basis up to all of its assets in securities
issued or guaranteed by the U.S. Government, its agencies or instrumentalities,
prime commercial paper, certificates of deposit, bankers' acceptances and other
obligations of domestic banks having total assets of at least $500 million, and
repurchase agreements. See "Investment Practices -- Repurchase Agreements."
Under normal market conditions, the yield on these securities will tend to be
lower than the yield on other securities owned by the Fund.
 
  RISK FACTORS OF INVESTING IN LOWER RATED DEBT SECURITIES. Past experience may
not provide an accurate indication of future performance of the market for lower
rated debt securities, particularly during periods of economic recession. An
economic downturn or increase in interest rates is likely to have a greater
negative effect on this market, the value of lower rated debt securities in the
Fund's portfolio, the Fund's net asset value and the ability of the bonds'
issuers to repay principal and interest, meet projected business goals and
obtain additional financing than on higher rated securities. These circumstances
also may result in a higher incidence of defaults than with respect to higher
rated securities. An investment in this Fund may be considered more speculative
than investment in shares of a fund which invests primarily in higher rated debt
securities.
 
  Prices of lower rated debt securities may be more sensitive to adverse
economic changes or corporate developments than higher rated investments. Debt
securities with longer maturities, which may have higher yields, may increase or
decrease in value more than debt securities with shorter maturities. Market
prices of lower rated debt securities structured as zero coupon or pay-in-kind
securities are affected to a greater extent by interest rate changes and may be
more volatile than securities which pay interest periodically and in cash. Where
it deems it appropriate and in the best interests of Fund shareholders, the Fund
may incur additional expenses to
 
                                       14
<PAGE>   15
 
seek recovery on a debt security on which the issuer has defaulted and to pursue
litigation to protect the interests of security holders of its portfolio
companies.
 
  Because the market for lower rated securities may be thinner and less active
than for higher rated securities, there may be market price volatility for these
securities and limited liquidity in the resale market. Nonrated securities are
usually not as attractive to as many buyers as rated securities are, a factor
which may make nonrated securities less marketable. These factors may have the
effect of limiting the availability of the securities for purchase by the Fund
and may also limit the ability of the Fund to sell such securities at their fair
value either to meet redemption requests or in response to changes in the
economy or the financial markets. Adverse publicity and investor perceptions,
whether or not based on fundamental analysis, may decrease the values and
liquidity of lower rated debt securities, especially in a thinly traded market.
To the extent the Fund owns or may acquire illiquid or restricted lower rated
securities, these securities may involve special registration responsibilities,
liabilities and costs, and liquidity and valuation difficulties. Changes in
values of debt securities which the Fund owns will affect its net asset value
per share. If market quotations are not readily available for the Fund's lower
rated or nonrated securities, these securities will be valued by a method that
the Fund's Trustees believe accurately reflects fair value. Judgment plays a
greater role in valuing lower rated debt securities than with respect to
securities for which more external sources of quotations and last sale
information are available.
 
  New and proposed laws may have an impact on the market for lower rated debt
securities. For example, as a result of the Financial Institution's Reform,
Recovery, and Enforcement Act of 1989, savings and loan associations must
dispose of their high yield bonds no later than July 1, 1994. Qualified
affiliates of savings and loan associations, however, may purchase and retain
these securities, and savings and loan associations may divest these securities
by sale to their qualified affiliates. The Adviser is unable at this time to
predict what effect, if any, the legislation may have on the market for lower
rated debt securities.
 
  Special tax considerations are associated with investing in lower rated debt
securities structured as zero coupon or pay-in-kind securities. The Fund accrues
income on these securities prior to the receipt of cash payments. The Fund must
distribute substantially all of its income to its shareholders to qualify for
pass-through treatment under the tax laws and may, therefore, have to dispose of
its portfolio securities to satisfy distribution requirements.
 
  While credit ratings are only one factor the Adviser relies on in evaluating
lower rated debt securities, certain risks are associated with using credit
ratings. Credit rating agencies may fail to timely change the credit ratings to
reflect subsequent events; however, the Adviser continuously monitors the
issuers of lower rated debt securities in its portfolio in an attempt to
determine if the issuers will have sufficient
 
                                       15
<PAGE>   16
 
cash flow and profits to meet required principal and interest payments.
Achievement of the Fund's investment objectives may be more dependent upon the
Adviser's credit analysis than is the case for higher quality debt securities.
Credit ratings for individual securities may change from time to time and the
Fund may retain a portfolio security whose rating has been changed.
 
  Investors should consider carefully the additional risks associated with
investment in securities which carry lower ratings.
 
- ------------------------------------------------------------------------------
INVESTMENT PRACTICES
- ------------------------------------------------------------------------------
 
  REPURCHASE AGREEMENTS. The Fund may enter into repurchase agreements with
domestic banks or broker-dealers in order to earn a return on temporarily
available cash. A repurchase agreement is a short-term investment in which the
purchaser (i.e., the Fund) acquires ownership of a debt security and the seller
agrees to repurchase the obligation at a future time and set price, thereby
determining the yield during the holding period. Repurchase Agreements involve
certain risks in the event of default by the other party. The Fund will not
invest in repurchase agreements maturing in more than seven days if any such
investment, together with any other illiquid securities held by the Fund,
exceeds 15% of the value of its net assets. In the event of the bankruptcy or
other default of a seller of a repurchase agreement, the Fund could experience
both delays in liquidating the underlying securities and loss including: (a)
possible decline in the value of the underlying security during the period while
the Fund seeks to enforce its rights thereto, (b) possible lack of access to
income on the underlying security during this period, and (c) expenses of
enforcing its rights. See the Statement of Additional Information.
 
  For the purpose of investing in repurchase agreements, the Adviser may
aggregate the cash that substantially all of the funds advised or subadvised by
the Adviser would otherwise invest separately into a joint account. The cash in
the joint account is then invested and the funds that contributed to the joint
account share pro rata in the net revenue generated. The Adviser believes that
the joint account produces greater efficiencies and economies of scale that may
contribute to reduced transaction costs, higher returns, higher quality
investments and greater diversity of investments for the Fund than would be
available to the Fund investing separately. The manner in which the joint
account is managed is subject to conditions set forth in the SEC order obtained
by the Fund authorizing this practice, which conditions are designed to ensure
the fair administration of the joint account and to protect the amounts in that
account.
 
  OPTIONS, FUTURES CONTRACTS AND RELATED OPTIONS. The investment policies of the
Fund permit the Fund to invest in or write options, futures contracts and
related
 
                                       16
<PAGE>   17
 
options. Thus, the Fund may engage in transactions in futures contracts on U.S.
Government securities.
 
  The Fund presently expects to utilize options, futures contracts and options
thereon in several different ways, depending upon the status of the Fund's
portfolio and the Adviser's expectations concerning the securities markets. See
the Statement of Additional Information for discussion of options, futures
contracts and related options.
 
  Potential Risks of Options, Futures Contracts and Related Options. The
purchase and sale of options and futures contracts involve risks different from
those involved with direct investments in securities. While utilization of
options, futures contracts and similar instruments may be advantageous to the
Fund, if the Adviser is not successful in employing such instruments in managing
the Fund's investments, the Fund's performance will be worse than if the Fund
did not make such investments. In addition, the Fund would pay commissions and
other costs in connection with such investments, which may increase the Fund's
expenses and reduce its return.
 
  The Fund may write or purchase options in privately negotiated transactions
("OTC Options") as well as listed options. OTC Options can be closed out only by
agreement with the other party to the transaction. Thus, any OTC Option
purchased by the Fund is considered an illiquid security. Any OTC Option written
by the Fund is with a qualified dealer pursuant to an agreement under which the
Fund may repurchase the option at a formula price. Such options are considered
illiquid to the extent that the formula price exceeds the intrinsic value of the
option. The Fund may not purchase or sell futures contracts or related options
for which the aggregate initial margin and premiums exceed five percent of the
fair market value of the Fund's assets. In order to prevent leverage in
connection with the purchase of futures contracts or call options thereon by the
Fund, an amount of cash, cash equivalents or liquid high grade debt securities
equal to the market value of the obligation under the futures contracts or
options (less any related margin deposits) will be maintained in a segregated
account with the Custodian. The Fund may not invest more than 15% of its net
assets in illiquid securities and repurchase agreements which have a maturity of
longer than seven days. A more complete discussion of the potential risks
involved in transactions in options, futures contracts and related options is
contained in the Statement of Additional Information.
 
  PORTFOLIO TURNOVER. Although the Fund does not intend to engage in substantial
short-term trading, it may sell portfolio securities without regard to the
length of time they have been held in order to take advantage of new investment
opportunities or yield differentials, or because the Fund desires to preserve
gains or limit losses due to changing economic conditions or the financial
condition of the issuer. The Fund's portfolio turnover rate (the lesser of the
value of the securities purchased or securities sold divided by the average
value of the securities held in
 
                                       17
<PAGE>   18
 
the Fund's portfolio excluding all securities whose maturities at acquisition
were one year or less) is shown in the table of "Financial Highlights." Since
portfolio changes are deemed appropriate due to market or other conditions, such
turnover rate may be expected to vary from year to year. A higher rate of
turnover results in increased transaction costs to the Fund.
 
  LENDING OF SECURITIES. The Fund may lend its portfolio securities to broker-
dealers and other financial institutions in an amount up to ten percent of the
total assets, provided that such loans are callable at any time by the Fund, and
are at all times secured by cash collateral that is at least equal to the market
value, determined daily, of the loaned securities. During the period of the
loan, the Fund receives the income on both the loaned securities and the
collateral and thereby increases its yield after payment of lending fees.
 
  RESTRICTED SECURITIES. The Fund may invest up to 15% of the value of its net
assets in restricted securities (i.e., securities which may not be sold without
registration or an exemption from registration under the Securities Act of 1933)
and in other illiquid securities and repurchase agreements maturing in more than
seven days. Restricted securities are generally purchased at a discount from the
market price of unrestricted securities of the same issuer. Investments in
restricted securities are not readily marketable without some time delay.
Investments in securities which have no ready market are valued at fair value as
determined in good faith by the Fund's Trustees. Ordinarily, the Fund would
invest in restricted securities only when it receives the issuer's commitment to
register the securities without expense to the Fund. However, registration and
underwriting expenses (which may range from seven percent to 15% of the gross
proceeds of the securities sold), may be paid by the Fund. A Fund position in
restricted securities might adversely affect the liquidity and marketability of
such securities, and the Fund might not be able to dispose of its holdings in
such securities at reasonable price levels. Although the Fund may invest up to
15% of its net assets in illiquid securities and repurchase agreements which
have a maturity of longer than seven days, the Fund shall not invest in such
securities in excess of 10% of its net assets without prior approval of the
Trustees.
 
  PORTFOLIO TRANSACTIONS AND BROKERAGE. The Adviser is responsible for the
placement of orders for the purchase and sale of portfolio securities for the
Fund and the negotiation of brokerage commissions on such transactions. Most
transactions made by the Fund are with dealers acting as principals. Brokerage
firms are selected on the basis of their professional capability for the type of
transaction and the value and quality of execution services rendered on a
continuing basis. The Adviser is authorized to place portfolio transactions with
brokerage firms participating in the distribution of shares of the Fund and
other Van Kampen American Capital mutual funds if it reasonably believes that
the quality of the execution and the commission are comparable to that available
from other qualified firms. The Adviser is
 
                                       18
<PAGE>   19
 
authorized to pay higher commissions to brokerage firms that provide it with
investment and research information than to firms which do not provide such
services if the Adviser determines that such commissions are reasonable in
relation to the overall services provided. The information received may be used
by the Adviser in managing the assets of other advisory accounts as well as in
the management of the assets of the Fund.
 
  SECURITIES OF FOREIGN ISSUERS. The Fund may invest up to 20% of its total
assets in United States currency denominated debt issues of foreign governments
and other foreign issuers. The Adviser believes that in many instances such
foreign debt securities may provide higher yields than securities of domestic
issuers which have similar maturities. Such securities may be subject to foreign
government taxes which would reduce the effective yield. Such securities may be
less liquid than the securities of the U.S. corporations, and are certainly less
liquid than securities issued by the U.S. Government or its agencies.
 
  The above-described foreign investments involve certain risks, which should be
considered carefully by an investor in the Fund. These risks include changes in
currency exchange rates, political or economic instability of the issuer or of
the country of issue, the difficulty of predicting international trade patterns
and the possibility of imposition of exchange controls. Such securities may also
be subject to greater fluctuations in price than securities of U.S. corporations
or of the U.S. Government. In addition, there may be less publicly available
information about a foreign company than about a domestic company. Foreign
companies generally are not subject to uniform accounting, auditing and
financial reporting standards comparable to those applicable to domestic
companies. There is generally less government regulation of stock exchanges,
brokers and listed companies abroad than in the United States, and, with respect
to certain foreign countries, there is a possibility of expropriation or
confiscatory taxation, or diplomatic developments which could affect investment
in those countries. Finally, in the event of a default on any such foreign debt
obligations, it may be more difficult for the Fund to obtain or to enforce
judgment against the issuers of such securities. Such investments will be made
only when the Adviser believes that higher yields justify the attendant risks.
 
  INVESTMENT RESTRICTIONS. The Fund has adopted certain investment restrictions
which may not be changed without approval by a majority (as defined in the 1940
Act) vote of the Fund's shareholders. These restrictions provide, among other
things, that the Fund may not:
 
  1.  Invest more than 15% of its net assets (determined at the time of
      investment) in illiquid securities and repurchase agreements which have a
      maturity of longer than seven days;
 
                                       19
<PAGE>   20
 
  2.  With respect to 75% of its assets, invest more than five percent of its
      assets in the securities of any one issuer (except the U.S. Government) or
      purchase more than ten percent of the outstanding voting securities, or
      more than ten percent of any class of securities, of any one issuer;
 
  3.  Invest more than 25% of the value of its total assets in securities of
      issuers in any particular industry (except obligations of the U.S.
      Government);
 
  4.  Invest more than five percent of its total assets in companies having a
      record, together with predecessors, of less than three years of continuous
      operation; and
 
  5.  Invest more than 20% of its total assets in U.S. currency denominated
      issues of foreign governments and other foreign issuers, or invest more
      than ten percent of its total assets in securities which are payable in
      currencies other than U.S. dollars.
 
- ------------------------------------------------------------------------------
INVESTMENT ADVISORY SERVICES
- ------------------------------------------------------------------------------
 
  THE ADVISER. The Adviser is a wholly owned subsidiary of Van Kampen American
Capital, Inc. ("Van Kampen American Capital"). Van Kampen American Capital is a
diversified asset management company with more than two million retail investor
accounts, extensive capabilities for managing institutional portfolios, and over
$54 billion under management or supervision. Van Kampen American Capital's 35
open-end and 38 closed-end funds and more than 2,800 unit investment trusts are
professionally distributed by leading financial advisers nationwide.
 
  Van Kampen American Capital Distributors, Inc., the distributor of the Fund
and the sponsor of the funds mentioned above, is also a wholly-owned subsidiary
of Van Kampen American Capital. Van Kampen American Capital is a wholly-owned
subsidiary of VK/AC Holding, Inc. VK/AC Holding, Inc. is controlled, through the
ownership of a substantial majority of its common stock, by The Clayton &
Dubilier Private Equity Fund IV Limited Partnership ("C&D L.P."), a Connecticut
limited partnership. C&D L.P. is managed by Clayton, Dubilier & Rice, Inc., a
New York based private investment firm. The General Partner of C&D L.P. is
Clayton & Dubilier Associates IV Limited Partnership ("C&D Associates L.P.").
The general partners of C&D Associates L.P. are Joseph L. Rice, III, B. Charles
Ames, William A. Barbe, Alberto Cribiore, Donald J. Gogel, Leon J. Hendrix, Jr.,
Hubbard C. Howe and Andrall E. Pearson, each of whom is a principal of Clayton,
Dubilier & Rice, Inc. In addition, certain officers, directors and employees of
Van Kampen American Capital own, in the aggregate, not more than seven percent
of the common stock of VK/AC Holding, Inc. and have the right to acquire, upon
the exercise of options, approximately an additional 11% of the common stock of
 
                                       20
<PAGE>   21
 
VK/AC Holding, Inc. Presently, and after giving effect to the exercise of such
options, no officer or trustee of the Fund owns or would own five percent or
more of the common stock of VK/AC Holding, Inc.
 
  ADVISORY AGREEMENT. The Fund retains the Adviser to manage the investment of
its assets and to place orders for the purchase and sale of its portfolio
securities. Under an investment advisory agreement between the Adviser and the
Fund (the "Advisory Agreement"), the Fund pays the Adviser a monthly fee
computed on average daily net assets of the Fund at the annual rate of 0.6250%
of the first $150 million of net assets; 0.55% of the next $150 million of net
assets; 0.50% of the excess over $300 million of net assets. Under the Advisory
Agreement, the Fund also reimburses the Adviser for the cost of the Fund's
accounting services, which include maintaining its financial books and records
and calculating its daily net asset value. Operating expenses paid by the Fund
include shareholder service agency fees, distribution fees, service fees,
custodial fees, legal and accounting fees, the costs of reports and proxies to
shareholders, trustees' fees, and all other business expenses not specifically
assumed by the Adviser. Advisory (management) fee, and total operating expense,
ratios are shown under the caption "Annual Fund Operating Expenses and Example"
herein.
 
  From time to time as the Adviser and/or the Distributor may deem appropriate,
they may voluntarily undertake to reduce the Fund's expenses by reducing the
fees payable to them to the extent of, or bearing expenses in excess of, such
limitations as they may establish.
 
  The Adviser may utilize, at its own expense, credit analysis, research and
trading support services provided by its affiliate, Van Kampen American Capital
Investment Advisory Corp.
 
  PERSONAL INVESTING POLICIES. The Fund and the Adviser have adopted Codes of
Ethics designed to recognize the fiduciary relationship between the Fund and the
Adviser and its employees. The Codes permit directors/trustees, officers and
employees to buy and sell securities for their personal accounts subject to
certain restrictions. Persons with access to certain sensitive information are
subject to pre-clearance and other procedures designed to prevent conflicts of
interest.
 
  PORTFOLIO MANAGEMENT. Ellis J. Bigelow is primarily responsible for the
day-to-day management of the Fund's investment portfolio. Ms. Bigelow is Vice
President of the Fund and Senior Vice President of the Adviser. Ms. Bigelow has
been an officer of the Fund since 1989, and was previously a Research Analyst
with the Adviser.
 
                                       21
<PAGE>   22
 
- ------------------------------------------------------------------------------
ALTERNATIVE SALES ARRANGEMENTS
- ------------------------------------------------------------------------------
 
  The Alternative Sales Arrangements permit an investor to choose the method of
purchasing shares that is most beneficial given the amount of the purchase and
the length of time the investor expects to hold the shares.
 
  CLASS A SHARES. Class A shares are sold at net asset value plus an initial
maximum sales charge of up to 4.75% of the offering price. Investments of $1
million or more are not subject to any sales charge at the time of purchase, but
a contingent deferred sales charge of one percent may be imposed on certain
redemptions made within one year of the purchase. Class A shares are subject to
an ongoing service fee at an annual rate of up to 0.25% of the Fund's aggregate
average daily net assets attributable to the Class A shares. Certain purchases
of Class A shares qualify for reduced initial sales charges. See "Purchase of
Shares -- Class A Shares."
 
  CLASS B SHARES. Class B shares are sold at net asset value and are subject to
a deferred sales charge if they are redeemed within five years of purchase.
Class B shares are subject to an ongoing service fee at an annual rate of up to
0.25% of the Fund's aggregate average daily net assets attributable to the Class
B shares and an ongoing distribution fee at an annual rate of up to 0.75% of the
Fund's aggregate average daily net assets attributable to the Class B shares.
Class B shares enjoy the benefit of permitting all of the investor's dollars to
work from the time the investment is made. The ongoing distribution fee paid by
Class B shares will cause such shares to have a higher expense ratio and to pay
lower dividends than those related to Class A shares. See "Purchase of
Shares -- Class B Shares." Class B shares will automatically convert to Class A
shares six years after the end of the calendar month in which the shareholder's
order to purchase was accepted. See "Conversion Feature" below for discussion on
applicability of the conversion feature to Class B shares.
 
  CLASS C SHARES. Class C shares are sold at net asset value and are subject to
a deferred sales charge if redeemed within one year of purchase. Class C shares
are subject to an ongoing service fee at an annual rate of up to 0.25% of the
Fund's aggregate average daily net assets attributable to the Class C shares and
an ongoing distribution fee at an annual rate of up to 0.75% of the Fund's
aggregate average daily net assets attributable to the Class C shares. Class C
shares enjoy the benefit of permitting all of the investor's dollars to work
from the time the investment is made. The ongoing distribution fee paid by Class
C shares will cause such shares to have a higher expense ratio and to pay lower
dividends than those related to Class A shares. See "Purchase of Shares -- Class
C Shares." Class C shares will automatically convert to Class A shares ten years
after the end of the calendar month in which the shareholder's order to purchase
was accepted. See "Conversion Feature" herein for discussion on applicability of
the conversion feature to Class C shares.
 
                                       22
<PAGE>   23
 
  CONVERSION FEATURE. Class B shares and Class C shares will automatically
convert to Class A shares six years or ten years, respectively, after the end of
the calendar month in which the shares were purchased and will no longer be
subject to the distribution fee. Such conversion will be on the basis of the
relative net asset values per share, without the imposition of any sales load,
fee or other charge. The purpose of the conversion feature is to relieve the
holders of the Class B shares and Class C shares that have been outstanding for
a period of time sufficient for the Distributor to have been substantially
compensated for distribution expenses related to the Class B shares or Class C
shares as the case may be, from the burden of the ongoing distribution fee.
 
  For purposes of conversion to Class A, shares purchased through the
reinvestment of dividends and distributions paid on Class B shares and Class C
shares in a shareholder's Fund account will be considered to be held in a
separate sub-account. Each time any Class B shares or Class C shares in the
shareholder's Fund account (other than those in the sub-account) convert to
Class A, an equal pro rata portion of the Class B shares or Class C shares in
the sub-account will also convert to Class A.
 
  The conversion of Class B shares and Class C shares to Class A shares is
subject to the continuing availability of an opinion of counsel to the effect
that (i) the assessment of the distribution fee and higher transfer agency costs
with respect to Class B shares and Class C shares does not result in the Fund's
dividends or distributions constituting "preferential dividends" under the
Internal Revenue Code of 1986, as amended (the "Code"), and (ii) the conversion
of shares does not constitute a taxable event under federal income tax law. The
conversion of Class B shares and Class C shares may be suspended if such an
opinion is no longer available. In that event, no further conversions of Class B
shares or Class C shares would occur, and shares might continue to be subject to
the distribution fee for an indefinite period which may extend beyond the period
ending six years or ten years, respectively, after the end of the calendar month
in which the shareholder's order to purchase was accepted.
 
  FACTORS FOR CONSIDERATION. In deciding which class of shares to purchase,
investors should take into consideration their investment goals, present and
anticipated purchase amounts, time horizons and temperaments. Investors should
consider whether, during the anticipated life of their investment in the Fund,
the accumulated distribution fees and contingent deferred sales charges on Class
B shares or Class C shares prior to conversion would be less than the initial
sales charge on Class A shares purchased at the same time, and to what extent
such differential would be offset by the higher dividends per share on Class A
shares. To assist investors in making this determination, the table under the
caption "Annual Fund Operating Expenses and Example" sets forth examples of the
charges applicable to each class of shares. In this regard, Class A shares may
be more
 
                                       23
<PAGE>   24
 
beneficial to the investor who qualifies for reduced initial sales charges or
purchases at net asset value, as described herein under "Purchase of
Shares -- Class A Shares." For these reasons, the Distributor will reject any
order of $500,000 or more for Class B shares or any order of $1 million or more
for Class C shares.
 
  Class A shares are not subject to an ongoing distribution fee and,
accordingly, receive correspondingly higher dividends per share. However,
because initial sales charges are deducted at the time of purchase for accounts
under $1 million, investors in Class A shares do not have all their funds
invested initially and, therefore, initially own fewer shares. Other investors
might determine that it is more advantageous to purchase either Class B shares
or Class C shares and have all their funds invested initially, although
remaining subject to ongoing distribution fees and, for a five-year or one-year
period, respectively, being subject to a contingent deferred sales charge.
Ongoing distribution fees on Class B shares and Class C shares will be offset to
the extent of the additional funds originally invested and any return realized
on those funds. However, there can be no assurance as to the return, if any,
which will be realized on such additional funds. For investments held for ten
years or more, the relative value upon liquidation of the three classes tends to
favor Class A or Class B shares, rather than Class C shares.
 
  Class A shares may be appropriate for investors who prefer to pay the sales
charge up front, want to take advantage of the reduced sales charges available
on larger investments, wish to maximize their current income from the start,
prefer not to pay redemption charges and/or have a longer-term investment
horizon. In addition, the check writing privilege is only available for Class A
shares (see "Shareholder Services Applicable to Class A Shareholders
Only -- Check Writing Privilege"). Class B shares may be appropriate for
investors who wish to avoid a front-end shares charge, put 100% of their
investment dollars to work immediately, and/or have a longer-term investment
horizon. Class C shares may be appropriate for investors who wish to avoid a
front-end sales charge, put 100% of their investment dollars to work
immediately, have a shorter-term investment horizon and/or desire a short
contingent deferred sales charge schedule.
 
  The distribution expenses incurred by the Distributor in connection with the
sale of the shares will be reimbursed, in the case of Class A shares, from the
proceeds of the initial sales charge and, in the case of Class B shares and
Class C shares, from the proceeds of the ongoing distribution fee and any
contingent deferred sales charge incurred upon redemption within five years or
one year, respectively, of purchase. Sales personnel of broker-dealers
distributing the Fund's shares and other persons entitled to receive
compensation for selling such shares may receive differing compensation for
selling Class A, Class B or Class C shares. INVESTORS SHOULD UNDERSTAND THAT THE
PURPOSE AND FUNCTION OF THE CONTINGENT DEFERRED SALES CHARGE AND ONGOING
DISTRIBUTION FEE WITH RESPECT TO THE CLASS B SHARES AND CLASS C
 
                                       24
<PAGE>   25
 
SHARES ARE THE SAME AS THOSE OF THE INITIAL SALES CHARGE WITH RESPECT TO CLASS A
SHARES. SEE "DISTRIBUTION PLANS."
 
  GENERAL. Dividends paid by the Fund with respect to Class A, Class B and Class
C shares will be calculated in the same manner at the same time on the same day,
except that the distribution fees and any incremental transfer agency costs
relating to Class B or Class C shares will be borne by the respective class. See
"Distributions from the Fund." Shares of the Fund may be exchanged, subject to
certain limitations, for shares of the same class of other mutual funds advised
by the Adviser. See "Shareholder Services -- Exchange Privilege."
 
  The Trustees of the Fund have determined that currently no conflict of
interest exists between the classes of shares. On an ongoing basis, the Trustees
of the Fund, pursuant to their fiduciary duties under the Investment Company Act
of 1940 (the "1940 Act") and state laws, will seek to ensure that no such
conflict arises.
 
- ------------------------------------------------------------------------------
PURCHASE OF SHARES
- ------------------------------------------------------------------------------
 
GENERAL
 
  The Fund offers three classes of shares to the general public on a continuous
basis through the Distributor as principal underwriter, which is located at One
Parkview Plaza, Oakbrook Terrace, Illinois 60181. Shares are also offered
through members of the National Association of Securities Dealers, Inc. ("NASD")
who are acting as securities dealers ("dealers") and NASD members or eligible
non-NASD members who are acting as brokers or agents or investors ("brokers").
The term "dealers" and "brokers" are sometimes referred to herein as "authorized
dealers." Class A shares are sold with an initial sales charge; Class B shares
and Class C shares are sold without an initial sales charge and are subject to a
contingent deferred sales charge upon certain redemptions. See "Alternative
Sales Arrangements" for a discussion of factors to consider in selecting which
class of shares to purchase. Contact the Investor Services Department at (800)
421-5666 for further information and appropriate forms.
 
  Initial investments must be at least $500 and subsequent investments must be
at least $25. Both minimums may be waived by the Distributor for plans involving
periodic investments. Shares of the Fund may be sold in foreign countries where
permissible. The Fund and the Distributor reserve the right to refuse any order
for the purchase of shares. The Fund also reserves the right to suspend the sale
of the Fund's shares to the public in response to conditions in the securities
markets or for other reasons.
 
  Shares may be purchased on any business day through authorized dealers. Shares
may also be purchased by completing the application accompanying this Prospectus
and forwarding the application, through the designated dealer, to the
shareholder
 
                                       25
<PAGE>   26
 
service agent, ACCESS Investor Services, Inc., a wholly owned subsidiary of Van
Kampen American Capital ("ACCESS"). When purchasing shares of the Fund,
investors must specify whether the purchase is for Class A, Class B or Class C
shares.
 
  Shares are offered at the next determined net asset value per share, plus a
front-end or contingent deferred sales charge depending on the method of
purchasing shares chosen by the investor, as shown in the tables herein. Net
asset value per share is determined once daily as of the close of trading on the
New York Stock Exchange (the "Exchange") (currently 4:00 p.m., New York time)
each day the Exchange is open. Net asset value per share for each class is
determined by dividing the value of the Fund's securities, cash and other assets
(including accrued interest) attributable to such class, less all liabilities
(including accrued expenses) attributable to such class, by the total number of
shares of the class outstanding. Portfolio securities that are actively traded
in the over-the-counter market are valued at the most recently quoted bid price.
Any security for which the primary market is on an exchange is valued at the
last reported sales price on the exchange where principally traded or at the
last reported bid price if there was no sale reported that day. If no sale or
bid price is reported that day, the security is valued at the most recent sale
price. The value of any other securities or other assets is fair value as
determined in good faith by the Fund's Trustees. Short-term securities are
valued in the manner described in the notes to the financial statements included
in the Statement of Additional Information.
 
  Generally, the net asset values per share of the Class A, Class B and Class C
shares are expected to be substantially the same. Under certain circumstances,
however, the per share net asset values of the Class A, Class B and Class C
shares may differ from one another, reflecting the daily expense accruals of the
distribution and higher transfer agency fees applicable with respect to the
Class B and Class C shares and the differential in the dividends paid on the
classes of shares. The price paid for shares purchased is based on the next
calculation of net asset value plus applicable Class A sales charges after an
order is received by a dealer provided such order is transmitted to the
Distributor prior to the Distributor's close of business on such day. Orders
received by dealers after the close of the Exchange are priced based on the next
close provided they are received by the Distributor prior to the Distributor's
close of business on such day. It is the responsibility of dealers to transmit
orders received by them to the Distributor so they will be received prior to
such time. Orders of less than $500 are mailed by the dealer and processed at
the offering price next calculated after acceptance by ACCESS.
 
  Each class of shares represents an interest in the same portfolio of
investments of the Fund, has the same rights and is identical in all respects,
except that (i) Class B and Class C shares bear the expenses of the deferred
sales arrangement and any expenses (including the distribution fee and
incremental transfer agency costs)
 
                                       26
<PAGE>   27
 
resulting from such sales arrangement, (ii) generally, each class has exclusive
voting rights with respect to approvals of the Rule 12b-1 distribution plan
pursuant to which its distribution fee and/or service fee is paid which relate
to a specific class, and (iii) Class B and Class C shares are subject to a
conversion feature. Each class has different exchange privileges and certain
different shareholder service options available. See "Distribution Plans" and
"Shareholder Services -- Exchange Privilege." The net income attributable to
Class B and Class C shares and the dividends payable on Class B and Class C
shares will be reduced by the amount of the distribution fee and incremental
expenses associated with such distribution fees. Sales personnel of
broker-dealers distributing the Fund's shares and other persons entitled to
receive compensation for selling such shares may receive differing compensation
for selling Class A, Class B or Class C shares.
 
  Agreements are in place which provide, among other things and subject to
certain conditions, for certain favorable distribution arrangements for shares
of the Fund with subsidiaries of The Travelers Inc.
 
  The Distributor may from time to time implement programs under which a broker,
dealer or financial intermediary's sales force may be eligible to win nominal
awards for certain sales efforts or under which the Distributor will reallow to
any broker, dealer or financial intermediary that sponsors sales contests or
recognition programs conforming to criteria established by the Distributor, or
participates in sales programs sponsored by the Distributor, an amount not
exceeding the total applicable sales charges on the sales generated by the
broker, dealer or financial intermediaries at the public offering price during
such programs. Other programs provide, among other things and subject to certain
conditions, for certain favorable distribution arrangements for shares of the
Fund. Also, the Distributor in its discretion may from time to time, pursuant to
objective criteria established by the Distributor, pay fees to, and sponsor
business seminars for, qualifying brokers, dealers or financial intermediaries
for certain services or activities which are primarily intended to result in
sales of shares of the Fund. Fees may include payment for travel expenses,
including lodging, incurred in connection with trips taken by invited registered
representatives and members of their families to locations within or outside of
the United States for meetings or seminars of a business nature. Such fees paid
for such services and activities with respect to the Fund will not exceed in the
aggregate 1.25% of the average total daily net assets of the Fund on an annual
basis. The Distributor may provide additional compensation to Edward D. Jones &
Co. or an affiliate thereof based on a combination of its sales of shares and
increases in assets under management. All of the foregoing payments are made by
the Distributor out of its own assets. These programs will not change the price
an investor will pay for shares or the amount that a Fund will receive from such
sale.
 
                                       27
<PAGE>   28
 
CLASS A SHARES
 
  The public offering price of Class A shares is the next determined net asset
value plus a sales charge, as set forth below.
 
SALES CHARGE TABLE
 
<TABLE>
<CAPTION>
                                                                        REALLOWED
                                                                        TO DEALERS
                                     AS % OF NET        AS % OF         (AS A % OF
              SIZE OF                   AMOUNT          OFFERING         OFFERING
            INVESTMENT                 INVESTED          PRICE            PRICE)
<S>                                  <C>              <C>              <C>
- ------------------------------------------------------------------------------
Less than $100,000.................     4.99%            4.75%            4.25%
$100,000 but less than $250,000....     3.90%            3.75%            3.25%
$250,000 but less than $500,000....     2.83%            2.75%            2.25%
$500,000 but less than
 $1,000,000........................     2.04%            2.00%            1.75%
$1,000,000 and over................       *                *                *
</TABLE>
 
- ------------------------------------------------------------------------------
 
* No sales charge is payable at the time of purchase on investments of $1
  million or more, although for such investments the Fund imposes a contingent
  deferred sales charge of one percent in the event of certain redemptions
  within one year of the purchase. The contingent deferred sales charge incurred
  upon redemption is paid to the Distributor in reimbursement for
  distribution-related expenses. A commission will be paid to dealers who
  initiate and are responsible for purchases of $1 million or more as follows:
  one percent on sales to $2 million, plus 0.80% on the next million, plus 0.20%
  on the next $2 million and 0.08% on the excess over $5 million.
 
  In addition to the reallowances from the applicable public offering price
described above, the Distributor may, from time to time, pay or allow additional
reallowances or promotional incentives, in the form of cash or other
compensation, to dealers that sell shares of the Fund. Dealers which are
reallowed all or substantially all of the sales charges may be deemed to be
underwriters for purposes of the Securities Act of 1933.
 
  The Distributor may also pay financial institutions (which may include banks)
and other industry professionals that provide services to facilitate
transactions in shares of the Fund for their clients a transaction fee up to the
level of the reallowance allowable to dealers described herein. Such financial
institutions, other industry professionals and dealers are hereinafter referred
to as "Service Organizations." Banks are currently prohibited under the
Glass-Steagall Act from providing certain underwriting or distribution services.
If banking firms were prohibited from acting in any capacity or providing any of
the described services, the Distributor would consider what action, if any,
would be appropriate. The Distributor does not believe that termination of a
relationship with a bank would result in any material adverse consequences to
the Fund. State securities laws regarding registration of banks and other
financial institutions may differ from the interpretations of federal law
expressed herein, and banks and other financial institutions may be required to
register as dealers pursuant to certain state laws.
 
                                       28
<PAGE>   29
 
QUANTITY DISCOUNTS
 
  Investors purchasing Class A shares may under certain circumstances be
entitled to pay reduced sales charges. The circumstances under which such
investors may pay reduced sales charges are described herein.
 
  Investors, or their brokers, dealers or financial intermediaries, must notify
the Fund whenever a quantity discount is applicable to purchases. Upon such
notification, an investor will receive the lowest applicable sales charge.
Quantity discounts may be modified or terminated at any time. For more
information about quantity discounts, investors should contact their broker,
dealer or financial intermediary or the Distributor.
 
  A person eligible for a reduced sales charge includes an individual, their
spouse and minor children and any corporation, partnership or sole
proprietorship which is 100% owned, either alone or in combination, by any of
the foregoing; a trustee or other fiduciary purchasing for a single fiduciary
account, or a "company" as defined in Section 2(a)(8) of the 1940 Act.
 
  As used herein, "Participating Funds" refers to all open-end investment
companies distributed by the Distributor other than Van Kampen American Capital
Tax Free Money Fund ("Tax Free Money Fund"), Van Kampen American Capital Reserve
Fund ("Reserve Fund") and The Govett Funds, Inc.
 
  Volume Discounts. The size of investment shown in the preceding table applies
to the total dollar amount being invested by any person in shares of the Fund
alone, or in any combination of shares of the Fund and shares of certain other
Participating Funds, although other Participating Funds may have different sales
charges.
 
  Cumulative Purchase Discount. The size of investment in the preceding table
may also be determined by combining the amount being invested in shares of the
Participating Funds plus the current offering price of all shares of the
Participating Funds which have been previously purchased and are still owned.
 
  Letter of Intent. A Letter of Intent provides an opportunity for an investor
to obtain a reduced sales charge by aggregating the investments over a 13-month
period to determine the sales charge as outlined in the table herein. The size
of investment shown in the preceding table also includes purchases of shares of
the Participating Funds over a 13-month period based on the total amount of
intended purchases plus the value of all shares of the Participating Funds
previously purchased and still owned. An investor may elect to compute the
13-month period starting up to 90 days before the date of execution of a Letter
of Intent. Each investment made during the period receives the reduced sales
charge applicable to the total amount of the investment goal. If the goal is not
achieved within the period, the investor must pay the difference between the
charges applicable to the
 
                                       29
<PAGE>   30
 
purchases made and the charges previously paid. The initial purchase must be for
an amount equal to at least five percent of the minimum total purchase amount of
the level selected. If trades not initially made under a Letter of Intent
subsequently qualify for a lower sales charge through the 90-day back-dating
provisions, an adjustment will be made at the expiration of the Letter of Intent
to give effect to the lower charge. Such adjustment in sales charge will be used
to purchase additional shares for the shareholder at the applicable discount
category. Additional information is contained in the application form
accompanying this Prospectus.
 
OTHER PURCHASE PROGRAMS
 
  Purchasers of Class A shares may be entitled to reduced initial sales charges
in connection with unit trust reinvestment programs and purchases by registered
representatives of selling firms or purchases by persons affiliated with the
Fund or the Distributor. The Fund reserves the right to modify or terminate
these arrangements at any time.
 
  Unit Trust Reinvestment Programs. The Fund permits unitholders of unit
investment trusts to reinvest distributions from such trusts in Class A shares
of the Fund, other Participating Funds, Tax Free Money Fund or Reserve Fund with
no minimum initial or subsequent investment requirement, and with a lower sales
charge if the administrator of an investor's unit investment trust program meets
certain uniform criteria relating to cost savings by the Fund and the
Distributor. The total sales charge for all investments made from unit trust
distributions will be one percent of the offering price (1.01% of net asset
value). Of this amount, the Distributor will pay to the broker, dealer or
financial intermediary, if any, through which such participation in the
qualifying program was initiated 0.50% of the offering price as a dealer
concession or agency commission. Persons desiring more information with respect
to this program, including the applicable terms and conditions thereof, should
contact their securities broker or dealer or the Distributor.
 
  The administrator of such a unit investment trust must have an agreement with
the Distributor pursuant to which the administrator will (1) submit a single
bulk order and make payment with a single remittance for all investments in the
Fund during each distribution period by all investors who choose to invest in
the Fund through the program and (2) provide ACCESS with appropriate backup data
for each participating investor in a computerized format fully compatible with
ACCESS's processing system.
 
  As further requirements for obtaining these special benefits, the Fund also
requires that all dividends and other distributions by the Fund be reinvested in
additional shares without any systematic withdrawal program. There will be no
minimum for reinvestments from unit investment trusts. The Fund will send
account activity statements to such participants on a monthly basis only, even
if
 
                                       30
<PAGE>   31
 
their investments are made more frequently. The Fund reserves the right to
modify or terminate this program at any time.
 
  NAV Purchase Options. Class A shares of the Fund may be purchased at net asset
value, upon written assurance that the purchase is made for investment purposes
and that the shares will not be resold except through redemption by the Fund,
by:
 
  (1) Current or retired Trustees/Directors of funds advised by the Adviser, Van
      Kampen American Capital Investment Advisory Corp. or John Govett & Co.
      Limited and such persons' families and their beneficial accounts.
 
  (2) Current or retired directors, officers and employees of VK/AC Holding,
      Inc. and any of its subsidiaries, Clayton, Dubilier & Rice, Inc.,
      employees of an investment subadviser to any fund described in (1) above
      or an affiliate of such subadviser; and such persons' families and their
      beneficial accounts.
 
  (3) Directors, officers, employees and registered representatives of financial
      institutions that have a selling group agreement with the Distributor and
      their spouses and minor children when purchasing for any accounts they
      beneficially own, or, in the case of any such financial institution, when
      purchasing for retirement plans for such institution's employees.
 
  (4) Registered investment advisers, trust companies and bank trust departments
      investing on their own behalf or on behalf of their clients provided that
      the aggregate amount invested in the Fund alone, or in any combination of
      shares of the Fund and shares of other Participating Funds as described
      herein under "Purchase of Shares -- Class A Shares -- Volume Discounts,"
      during the 13 month period commencing with the first investment pursuant
      hereto equals at least $1 million. The Distributor may pay Service
      Organizations through which purchases are made an amount up to 0.50% of
      the amount invested, over a twelve month period following such
      transaction.
 
  (5) Trustees and other fiduciaries purchasing shares for retirement plans of
      organizations with retirement plan assets of $10 million or more. The
      Distributor may pay commissions of up to one percent for such purchases.
 
  (6) Accounts as to which a bank or broker-dealer charges an account management
      fee ("wrap accounts"), provided the bank or broker-dealer has a separate
      agreement with the Distributor.
 
  (7) Investors purchasing shares of the Fund with redemption proceeds from
      other mutual fund complexes on which the investor has paid a front-end
      sales charge or was subject to a deferred sales charge, whether or not
      paid, if such redemption has occurred no more than 30 days prior to such
      purchase.
 
  (8) Full service participant directed profit sharing and money purchase plans,
      full service 401(k) plans, or similar full service recordkeeping programs
      made available through Van Kampen American Capital Trust Company
 
                                       31
<PAGE>   32
 
      with at least 50 eligible employees or investing at least $250,000 in
      Participating Funds, Tax Free Money Fund or Reserve Fund. For such
      investments the Fund imposes a contingent deferred sales charge of one
      percent in the event of redemptions within one year of the purchase other
      than redemptions required to make payments to participants under the
      terms of the plan. The contingent deferred sales charge incurred upon
      redemption is paid to the Distributor in reimbursement for
      distribution-related expenses. A commission will be paid to dealers who
      initiate and are responsible for such purchases as follows: one percent
      on sales to $5 million, plus 0.50% on the next $5 million, plus 0.25% on
      the excess over $10 million. 
 
  (9) Participants with accounts established after October 12, 1995, in any
      403(b)(7) program of a college or university system which permits only net
      asset value mutual fund investments and for which Van Kampen American
      Capital Trust Company serves as custodian. In connection with such
      purchases, the Distributor may pay, out of its own assets, a commission to
      brokers, dealers, or financial intermediaries as follows: one percent on
      sales up to $5 million, plus 0.50% on the next $5 million, plus 0.25% on
      the excess over $10 million.
 
  The term "families" includes a person's spouse, minor children and
grandchildren, parents, and a person's spouse's parents.
 
  Purchase orders made pursuant to clause (4) may be placed either through
authorized dealers as described above or directly with ACCESS by the investment
adviser, trust company or bank trust department, provided that ACCESS receives
federal funds for the purchase by the close of business on the next business day
following acceptance of the order. An authorized dealer or financial institution
may charge a transaction fee for placing an order to purchase shares pursuant to
this provision or for placing a redemption order with respect to such shares.
Service Organizations will be paid a service fee as described herein under
"Distribution Plans" on purchases made as described in (3) through (9) above.
The Fund may terminate, or amend the terms of, offering shares of the Fund at
net asset value to such groups at any time.
 
CLASS B SHARES
 
  Class B shares are offered at the next determined net asset value. Class B
shares which are redeemed within five years of purchase are subject to a
contingent deferred sales charge at the rates set forth in the following table
charged as a percentage of the dollar amount subject thereto. The charge is
assessed on an amount equal to the lesser of the then current market value or
the cost of the shares being redeemed. Accordingly, no sales charge is imposed
on increases in net asset value above the initial purchase price. In addition,
no charge is assessed on shares derived from reinvestment of dividends or
capital gains distributions.
 
                                       32
<PAGE>   33
 
  The amount of the contingent deferred sales charge, if any, varies depending
on the number of years from the time of payment for the purchase of Class B
shares until the time of redemption of such shares. Solely for purposes of
determining the number of years from the time of any payment for the purchase of
shares, all payments during a month are aggregated and deemed to have been made
on the last day of the month.
 
- ------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                 CONTINGENT DEFERRED SALES
                                                 CHARGE AS A PERCENTAGE OF
            YEAR SINCE PURCHASE               DOLLAR AMOUNT SUBJECT TO CHARGE
<S>                                         <C>
- ------------------------------------------------------------------------------
First.......................................             4.0%
Second......................................             4.0%
Third.......................................             3.0%
Fourth......................................             2.5%
Fifth.......................................             1.5%
Sixth.......................................             None
</TABLE>
 
- ------------------------------------------------------------------------------
 
  In determining whether a contingent deferred sales charge is applicable to a
redemption, it is assumed that the redemption is first, of any shares in the
shareholder's Fund account that are not subject to a contingent deferred sales
charge, second, of shares held for over five years or shares acquired pursuant
to reinvestment of dividends or distributions and third, of shares held longest
during the five-year period.
 
  To provide an example, assume an investor purchased 100 shares at $10 per
share (at a cost of $1,000) and in the second year after purchase, the net asset
value per share is $12 and, during such time, the investor has acquired ten
additional shares upon dividend reinvestment. If at such time the investor makes
his or her first redemption of 50 shares (proceeds of $600), ten shares will not
be subject to charge because of dividend reinvestment. With respect to the
remaining 40 shares, the charge is applied only to the original cost of $10 per
share and not to the increase in net asset value of $2 per share. Therefore,
$400 of the $600 redemption proceeds is subject to a deferred sales charge at a
rate of four percent (the applicable rate in the second year after purchase).
 
  A commission or transaction fee of four percent of the purchase amount will be
paid to broker-dealers and other Service Organizations at the time of purchase.
Additionally, the Distributor may, from time to time, pay additional promotional
incentives in the form of cash or other compensation, to Service Organizations
that sell Class B shares of the Fund.
 
                                       33
<PAGE>   34
 
CLASS C SHARES
 
  Class C shares are offered at the next determined net asset value. Class C
shares which are redeemed within the first year of purchase are subject to a
contingent deferred sales charge of one percent. The charge is assessed on an
amount equal to the lesser of the then current market value or the cost of the
shares being redeemed. Accordingly, no sales charge is imposed on increases in
net asset value above the initial purchase price. In addition, no charge is
assessed on shares derived from reinvestment of dividends or capital gains
distributions.
 
  In determining whether a contingent deferred sales charge is applicable to a
redemption, the calculation is determined in the manner that results in the
lowest possible rate being charged. Therefore, it is assumed that the redemption
is first of any shares in the shareholder's Fund account that are not subject to
a contingent deferred sales charge and second of shares held for more than one
year or shares acquired pursuant to reinvestment of dividends or distributions.
 
  A commission or transaction fee of one percent of the purchase amount will be
paid to broker-dealers and other Service Organizations at the time of purchase.
Broker-dealers and other Service Organizations will also be paid ongoing
commissions and transaction fees of up to 0.75% of the average daily net assets
of the Fund's Class C shares for the second through tenth year after purchase.
Additionally, the Distributor may, from time to time, pay additional promotional
incentives in the form of cash or other compensation to Service Organizations
that sell Class C shares of the Fund.
 
WAIVER OF CONTINGENT DEFERRED SALES CHARGE
 
  The contingent deferred sales charge is waived on redemptions of Class B and
Class C shares (i) following the death or disability (as defined in the Code) of
a shareholder, (ii) in connection with certain distributions from an IRA or
other retirement plan, (iii) pursuant to the Fund's systematic withdrawal plan
but limited to 12% annually of the initial value of the account, and (iv)
effected pursuant to the right of the Fund to liquidate a shareholder's account
as described herein under "Redemption of Shares." The contingent deferred sales
charge is also waived on redemptions of Class C shares as it relates to the
reinvestment of redemption proceeds in shares of the same class of the Fund
within 120 days after redemption. See the Statement of Additional Information
for further discussion of waiver provisions.
 
                                       34
<PAGE>   35
 
- ------------------------------------------------------------------------------
SHAREHOLDER SERVICES
- ------------------------------------------------------------------------------
 
  The Fund offers a number of shareholder services designed to facilitate
investment in its shares at little or no extra cost to the investor. Below is a
description of these services.
 
SHAREHOLDER SERVICES APPLICABLE TO ALL CLASSES
 
  INVESTMENT ACCOUNT. Each shareholder has an investment account under which
shares are held by ACCESS. Except as described herein, after each share
transaction in an account, the shareholder receives a statement showing the
activity in the account. Each shareholder who has an account in certain of the
Participating Funds or Reserve, may receive statements quarterly from ACCESS
showing any reinvestments of dividends and capital gains distributions and any
other activity in the account since the preceding statement. Such shareholders
also will receive separate confirmations for each purchase or sale transactions
other than reinvestment of dividends and capital gains distributions and
systematic purchases or redemptions. Additions to an investment account may be
made at any time by purchasing shares through authorized investment dealers or
by mailing a check directly to ACCESS.
 
  SHARE CERTIFICATES. As a rule, the Fund will not issue share certificates.
However, upon written or telephone request to the Fund, a share certificate will
be issued, representing shares (with the exception of fractional shares) of the
Fund. A shareholder will be required to surrender such certificates upon
redemption thereof. In addition, if such certificates are lost the shareholder
must write to Van Kampen American Capital Funds, c/o ACCESS, P.O. Box 418256,
Kansas City, MO 64141-9256, requesting an "affidavit of loss" and obtain a
Surety Bond in a form acceptable to ACCESS. On the date the letter is received
ACCESS will calculate no more than two percent of the net asset value of the
issued shares, and bill the party to whom the certificate was mailed.
 
  REINVESTMENT PLAN. A convenient way for investors to accumulate additional
shares is by accepting dividends and capital gains distributions in shares of
the Fund. Such shares are acquired at net asset value (without sales charge) on
the record date. Unless the shareholder instructs otherwise, the reinvestment
plan is automatic. This instruction may be made by telephone by calling (800)
421-5666 ((800) 772-8889 for the hearing impaired). The investor may, on the
initial application or prior to any declaration, instruct that dividends be paid
in cash and capital gains distributions be reinvested at net asset value, or
that both dividends and capital gains distributions be paid in cash.
 
  AUTOMATIC INVESTMENT PLAN. An automatic investment plan is available under
which a shareholder can authorize ACCESS to charge a bank account on a regular
 
                                       35
<PAGE>   36
 
basis to invest pre-determined amounts in the Fund. Additional information is
available from the Distributor or authorized investment dealers.
 
  RETIREMENT PLANS. Eligible investors may establish individual retirement
accounts ("IRAs"); SEP; and pension and profit sharing plans; 401(k) plans; or
Section 403(b)(7) plans in the case of employees of public school systems and
certain non-profit organizations. Documents and forms containing detailed
information regarding these plans are available from the Distributor. American
Capital Trust Company serves as custodian under the IRA, 403(b)(7) and Keogh
plans. Details regarding fees, as well as full plan administration for profit
sharing, pension and 401(k) plans, are available from the Distributor.
 
  AUTOMATED CLEARING HOUSE ("ACH") DEPOSITS. Holders of Class A shares can use
ACH to have redemption proceeds deposited electronically into their bank
accounts. Redemptions transferred to a bank account via the ACH plan are
available to be credited to the account on the second business day following
normal payment. In order to utilize this option, the shareholder's bank must be
a member of Automated Clearing House. In addition, the shareholder must fill out
the appropriate section of the account application. The shareholder must also
include a voided check or deposit slip from the bank account into which
redemptions are to be deposited together with the completed application. Once
ACCESS has received the application and the voided check or deposit slip, such
shareholder's designated bank account, following any redemption, will be
credited with the proceeds of such redemption. Once enrolled in the ACH plan, a
shareholder may terminate participation at any time by writing ACCESS.
 
  DIVIDEND DIVERSIFICATION. A shareholder may, upon written request or by
completing the appropriate section of the application form accompanying this
Prospectus or by calling (800) 421-5666 ((800) 772-8889 for the hearing
impaired), elect to have all dividends and other distributions paid on a Class
A, Class B or Class C account in the Fund invested into a pre-existing Class A,
Class B or Class C account in any of the Participating Funds, Tax Free Money
Fund or Reserve Fund.
 
  If a qualified, pre-existing account does not exist, the shareholder must
establish a new account subject to minimum investment and other requirements of
the fund into which distributions would be invested. Distributions are invested
into the selected fund at its net asset value as of the payable date of the
distribution only if shares of such selected fund have been registered for sale
in the investor's state.
 
  EXCHANGE PRIVILEGE. Shares of the Fund or of any Participating Fund, other
than Van Kampen American Capital Government Target Fund ("Government Target"),
may be exchanged for shares of the same class of shares of any other Fund
without sales charge, provided that shares of certain other Van Kampen American
Capital fixed-income funds may not be exchanged within 30 days of acquisition
without Adviser approval. Shares of Government Target may be exchanged for
 
                                       36
<PAGE>   37
 
   
Class A shares of the Fund without sales charge. Class A shares of Tax Free
Money Fund or Reserve Fund that were not acquired in exchange for Class B or
Class C shares of a Participating Fund may be exchanged for Class A shares of
the Fund upon payment of the excess, if any, of the sales charge rate applicable
to the shares being acquired over the sales charge rate previously paid. Shares
of Tax Free Money Fund or Reserve Fund acquired through an exchange of Class B
or Class C shares may be exchanged only for the same class of shares of a
Participating Fund without incurring a contingent deferred sales charge. Shares
of any Participating Fund, Tax Free Money Fund or Reserve Fund may be exchanged
for shares of any other Participating Fund if shares of that Participating Fund
are available for sale; however, during periods of suspension of sales, shares
of a Participating Fund may be available for sale only to existing shareholders
of a Participating Fund.
    
 
  Class B and Class C shareholders of the Fund have the ability to exchange
their shares ("original shares") for the same class of shares of any other
American Capital fund that offers such shares ("new shares") in an amount equal
to the aggregate net asset value of the original shares, without the payment of
any contingent deferred sales charge otherwise due upon redemption of the
original shares. For purposes of computing the contingent deferred sales charge
payable upon a disposition of the new shares, the holding period for the
original shares is added to the holding period of the new shares. Class B or
Class C shareholders remain subject to the contingent deferred sales charge
imposed by the fund initially purchased by the shareholder upon their redemption
from the Van Kampen American Capital complex of funds. The contingent deferred
sales charge is based on the holding period requirement of the original fund.
 
  Shares of the fund to be acquired must be registered for sale in the
investor's state. Exchanges of shares are sales and may result in a gain or loss
for federal income tax purposes, although if the shares exchanged have been held
for less than 91 days, the sales charge paid on such shares is not included in
the tax basis of the exchanged shares, but is carried over and included in the
tax basis of the shares acquired. See the Statement of Additional Information.
 
  A shareholder wishing to make an exchange may do so by sending a written
request to ACCESS or by contacting the telephone transaction line at (800)
421-5684. A shareholder automatically has telephone exchange privileges unless
otherwise designated in the application form accompanying this Prospectus. Van
Kampen American Capital and its subsidiaries, including ACCESS (collectively,
"VKAC"), and the Fund employ procedures considered by them to be reasonable to
confirm that instructions communicated by telephone are genuine. Such procedures
include requiring certain personal identification information prior to acting
upon telephone instructions, tape recording telephone communications, and
providing written confirmation of instructions communicated by telephone. If
reasonable
 
                                       37
<PAGE>   38
 
procedures are employed, neither VKAC nor the Fund will be liable for following
telephone instructions which it reasonably believes to be genuine. VKAC and the
Fund may be liable for any losses due to unauthorized or fraudulent instructions
if reasonable procedures are not followed. Exchanges are effected at the net
asset value per share next calculated after the request is received in good
order with adjustment for any additional sales charge. See "Purchase of Shares"
and "Redemption of Shares." If the exchanging shareholder does not have an
account in the fund whose shares are being acquired, a new account will be
established with the same registration, dividend and capital gains options
(except dividend diversification) and dealer of record as the account from which
shares are exchanged, unless otherwise specified by the shareholder. In order to
establish a systematic withdrawal plan for the new account or reinvest dividends
from the new account into another fund, however, an exchanging shareholder must
file a specific written request. The Fund reserves the right to reject any order
to acquire its shares through exchange. In addition, the Fund may modify,
restrict or terminate the exchange privilege at any time on 60 days' notice to
its shareholders of any termination or material amendment.
 
  A prospectus of any of these mutual funds may be obtained from any authorized
dealer or the Distributor. An investor considering an exchange to one of such
funds should refer to the prospectus for additional information regarding such
fund prior to investing.
 
  SYSTEMATIC WITHDRAWAL PLAN. Any investor whose shares in a single account
total $10,000 or more at the offering price next computed after receipt of
instructions may establish a monthly, quarterly, semi-annual or annual
withdrawal plan. This plan provides for the orderly use of the entire account,
not only the income but also the capital, if necessary. Each withdrawal
constitutes a redemption of shares on which any capital gain or loss will be
recognized. The planholder may arrange for monthly, quarterly, semi-annual or
annual checks in any amount, not less than $25. Such a systematic withdrawal
plan may also be maintained by an investor purchasing shares for a retirement
plan established on a form made available by the Fund. See "Shareholder
Services -- Retirement Plans."
 
  Class B and Class C shareholders who establish a withdrawal plan may redeem up
to 12% annually of the shareholder's initial account balance without incurring a
contingent deferred sales charge. Initial account balance means the amount of
the shareholder's investment in the Fund at the time the election to participate
in the plan is made. See "Purchase of Shares -- Waiver of Contingent Deferred
Sales Charge" and the Statement of Additional Information.
 
  Under the plan, sufficient shares of the Fund are redeemed to provide the
amount of the periodic withdrawal payment. Dividends and capital gains
distributions on shares held under the plans are reinvested in additional shares
at the next determined net asset value. If periodic withdrawals continuously
exceed reinvested
 
                                       38
<PAGE>   39
 
dividends and capital gains distributions, the shareholder's original investment
will be correspondingly reduced and ultimately exhausted. Withdrawals made
concurrently with the purchase of additional shares ordinarily will be
disadvantageous to the shareholder because of the duplication of sales charges.
Any taxable gain or loss will be recognized by the shareholder upon redemption
of shares.
 
SHAREHOLDER SERVICES APPLICABLE TO
CLASS A SHAREHOLDERS ONLY
 
  CHECK WRITING PRIVILEGE. A Class A shareholder holding shares of the Fund for
which certificates have not been issued and which are in a non-escrow status may
appoint ACCESS as agent by completing the AUTHORIZATION FOR REDEMPTION BY CHECK
form and the appropriate section of the application and returning the form and
the application to ACCESS. Once the form is properly completed, signed and
returned to the agent, a supply of checks drawn on State Street Bank and Trust
Company ("State Street Bank") will be sent to the Class A shareholder. These
checks may be made payable by the Class A shareholder to the order of any person
in any amount of $100 or more.
 
  When a check is presented to State Street Bank for payment, full and
fractional Class A shares required to cover the amount of the check are redeemed
from the shareholder's Class A account by ACCESS at the next determined net
asset value. Check writing redemptions represent the sale of Class A shares. Any
gain or loss realized on the sale of shares is a taxable event. See "Redemption
of Shares."
 
  Checks will not be honored for redemption of Class A shares held less than 15
calendar days, unless such Class A shares have been paid for by bank wire. Any
Class A shares for which there are outstanding certificates may not be redeemed
by check. If the amount of the check is greater than the proceeds of all
uncertificated shares held in the shareholder's Class A account, the check will
be returned and the shareholder may be subject to additional charges. A Class A
shareholder may not liquidate the entire account by means of a check. The check
writing privilege may be terminated or suspended at any time by the Fund or
State Street Bank. Retirement Plans and accounts that are subject to backup
withholding are not eligible for the privilege. A "stop payment" system is not
available on these checks. See the Statement of Additional Information for
further information regarding the establishment of the privilege.
 
- ------------------------------------------------------------------------------
REDEMPTION OF SHARES
- ------------------------------------------------------------------------------
 
  REGULAR REDEMPTIONS. Shareholders may redeem for cash some or all of their
shares of the Fund at any time. To do so, a written request in proper form must
be sent directly to ACCESS, P.O. Box 418256, Kansas City, Missouri 64141-9256.
 
                                       39
<PAGE>   40
 
Shareholders may also place redemption requests through an authorized dealer.
Orders received from dealers must be at least $500 unless transmitted via the
FUNDSERV network. The redemption price for such shares is the net asset value
next calculated after an order is received by a dealer provided such order is
transmitted to the Distributor prior to the Distributor's close of business on
such day. It is the responsibility of dealers to transmit redemption requests
received by them to the Distributor so they will be received prior to such time.
 
  As described herein under "Purchase of Shares," redemptions of Class B and
Class C shares are subject to a contingent deferred sales charge. In addition, a
contingent deferred sales charge of one percent may be imposed on certain
redemptions of Class A shares made within one year of purchase for investment of
$1 million or more and for certain qualified 401(k) retirement plans. The
contingent deferred sales charge incurred upon redemption is paid by the
Distributor in reimbursement for distribution-related expenses. See "Purchase of
Shares." A custodian of a retirement plan account may charge fees based on the
custodian's independent fee schedule.
 
  The request for redemption must be signed by all persons in whose names the
shares are registered. Signatures must conform exactly to the account
registration. If the proceeds of the redemption exceed $50,000, or if the
proceeds are not to be paid to the record owner at the record address, or if the
record address has changed within the previous 30 days, signature(s) must be
guaranteed by one of the following: a bank or trust company; a broker-dealer; a
credit union; a national securities exchange, registered securities association
or clearing agency; a savings and loan association; or a federal savings bank.
 
  Generally, a properly signed written request with any required signature
guarantee is all that is required for a redemption. In some cases, however,
other documents may be necessary. For example, although the Fund normally does
not issue certificates for shares, it will do so if a special request has been
made to ACCESS. In the case of shareholders holding certificates, the
certificates for the shares being redeemed must accompany the redemption
request. In the event the redemption is requested by a corporation, partnership,
trust, fiduciary, executor or administrator, and the name and title of the
individual(s) authorizing such redemption is not shown in the account
registration, a copy of the corporate resolution or other legal documentation
appointing the authorized signer and certified within the prior 60 days must
accompany the redemption request. IRA redemption requests should be sent to the
IRA custodian to be forwarded to ACCESS. Where Van Kampen American Capital Trust
Company serves as custodian, special IRA, 403(b)(7), or Keogh distribution forms
must be obtained from and be forwarded to Van Kampen American Capital Trust
Company, P.O. Box 944, Houston, Texas 77001-0944. Contact the custodian for
information.
 
                                       40
<PAGE>   41
 
  In the case of redemption requests sent directly to ACCESS, the redemption
price is the net asset value per share next determined after the request is
received in proper form. Payment for shares redeemed will be made by check
mailed within seven days after acceptance by ACCESS of the request and any other
necessary documents in proper order. Such payment may be postponed or the right
of redemption suspended as provided by the rules of the SEC. If the shares to be
redeemed have been recently purchased by check, ACCESS may delay mailing a
redemption check until the purchase check has cleared, usually a period of up to
15 days. Any taxable gain or loss will be recognized by the shareholder upon
redemption of shares.
 
  The Fund may redeem any shareholder account with a net asset value on the date
of the notice of redemption less than the minimum investment as specified by the
Trustees. At least 60 days advance written notice of any such involuntary
redemption is required and the shareholder is given an opportunity to purchase
the required value of additional shares at the next determined net asset value
without sales charge. Any applicable contingent deferred sales charge will be
deducted from the proceeds of this redemption. Any involuntary redemption may
only occur if the shareholder account is less than the minimum initial
investment due to shareholder redemptions.
 
  TELEPHONE REDEMPTIONS. In addition to the regular redemption procedures
previously set forth, the Fund permits redemption of shares by telephone and for
redemption proceeds to be sent to the address of record for the account or to
the bank account of record as described below. To establish such privilege, a
shareholder must complete the appropriate section of the application form
accompanying this Prospectus or call the Fund at (800) 421-5666 to request that
a copy of the Telephone Redemption Authorization form be sent to them for
completion. To redeem shares, contact the telephone transaction line at (800)
421-5684. VKAC and the Fund employ procedures considered by them to be
reasonable to confirm that instructions communicated by telephone are genuine.
Such procedures include requiring certain personal identification information
prior to acting upon telephone instructions, tape recording telephone
communications, and providing written confirmation of instructions communicated
by telephone. If reasonable procedures are employed, neither VKAC nor the Fund
will be liable for following telephone instructions which it reasonably believes
to be genuine. VKAC and the Fund may be liable for any losses due to
unauthorized or fraudulent instructions if reasonable procedures are not
followed. Telephone redemptions may not be available if the shareholder cannot
reach ACCESS by telephone, whether because all telephone lines are busy or for
any other reason; in such case, a shareholder would have to use the Fund's
regular redemption procedure previously described. Requests received by ACCESS
prior to 4:00 p.m., New York time, on a regular business day will be processed
at the net asset value per share determined that day. These privileges are
available for all accounts other than retirement accounts. The telephone
redemption
 
                                       41
<PAGE>   42
 
privilege is not available for shares represented by certificates. If an account
has multiple owners, ACCESS may rely on the instructions of any one owner.
 
  For redemptions authorized by telephone, amounts of $50,000 or less may be
redeemed daily if the proceeds are to be paid by check and amounts of at least
$1,000 up to $1 million may be redeemed daily if the proceeds are to be paid by
wire. The proceeds must be payable to the shareholder(s) of record and sent to
the address of record for the account or wired directly to their predesignated
bank account. This privilege is not available if the address of record has been
changed within 30 days prior to a telephone redemption request. Proceeds from
redemptions are expected to be wired on the next business day following the date
of redemption. This service is also not available with respect to shares held in
an individual retirement account (IRA) for which Van Kampen American Capital
Trust Company acts as custodian. To establish such privilege a shareholder must
complete the appropriate section of the application form accompanying this
Prospectus or call the Fund at (800) 421-5666. The Fund reserves the right at
any time to terminate, limit or otherwise modify this redemption privilege.
 
  REDEMPTION UPON DISABILITY. The Fund will waive the contingent deferred sales
charge on redemptions following the disability of a Class B and Class C
shareholder. An individual will be considered disabled for this purpose if he or
she meets the definition thereof in Section 72(m)(7) of the Code, which in
pertinent part defines a person as disabled if such person "is unable to engage
in any substantial gainful activity by reason of any medically determinable
physical or mental impairment which can be expected to result in death or to be
of long-continued and indefinite duration." While the Fund does not specifically
adopt the balance of the Code's definition which pertains to furnishing the
Secretary of Treasury with such proof as he or she may require, the Distributor
will require satisfactory proof of disability before it determines to waive the
contingent deferred sales charge on Class B and Class C shares.
 
  In cases of disability, the contingent deferred sales charge on Class B and
Class C shares will be waived where the disabled person is either an individual
shareholder or owns the shares as a joint tenant with right of survivorship or
is the beneficial owner of a custodial or fiduciary account, and where the
redemption is made within one year of the initial determination of disability.
This waiver of the contingent deferred sales charge on Class B and Class C
shares applies to a total or partial redemption, but only to redemptions of
shares held at the time of the initial determination of disability.
 
  REINSTATEMENT PRIVILEGE. A Class A or Class B shareholder who has redeemed
shares of the Fund may reinstate any portion or all of the net proceeds of such
redemption in Class A shares of the Fund. A Class C shareholder who has redeemed
shares of the Fund may reinstate any portion or all of the net proceeds of such
redemption in Class C shares of the Fund with credit given for any contingent
 
                                       42
<PAGE>   43
 
deferred sales charge paid upon such redemption. Such reinstatement is made at
the net asset value (without sales charge except as described under "Shareholder
Services -- Exchange Privilege") next determined after the order is received,
which must be within 120 days after the date of the redemption. See "Purchase of
Shares -- Waiver of Contingent Deferred Sales Charge" and the Statement of
Additional Information. Reinstatement at net asset value is also offered to
participants in those eligible retirement plans held or administered by Van
Kampen American Capital Trust Company for repayment of principal (and interest)
on their borrowings on such plans.
 
- ------------------------------------------------------------------------------
DISTRIBUTION PLANS
- ------------------------------------------------------------------------------
 
  Rule 12b-1 adopted by the SEC under the 1940 Act permits an investment company
to directly or indirectly pay expenses associated with the distribution of its
shares ("distribution expenses") and servicing its shareholders in accordance
with a plan adopted by the investment company's board of directors and approved
by its shareholders. Pursuant to such Rule, the Trustees of the Fund, and the
shareholders of each class have adopted three Distribution Plans hereinafter
referred to as the "Class A Plan," the "Class B Plan" and the "Class C Plan."
Each Distribution Plan is in compliance with the Rules of Fair Practice of the
NASD ("NASD Rules") applicable to mutual fund sales charges. The NASD Rules
limit the annual distribution costs and service fees that a mutual fund may
impose on a class of shares. The NASD Rules also limit the aggregate amount
which the Fund may pay for such distribution costs. Under the Class A Plan, the
Fund pays a service fee to the Distributor at an annual rate of up to 0.25% of
the Fund's aggregate average daily net assets attributable to the Class A
shares. Such payments to the Distributor under the Class A Plan are based on an
annual percentage of the value of Class A shares held in shareholder accounts
for which such Service Organizations are responsible at the rates of 0.15%
annually with respect to Class A shares in such accounts on September 29, 1989
and 0.25% annually with respect to Class A shares issued after that date. Under
the Class B Plan and the Class C Plan, the Fund pays a service fee to the
Distributor at an annual rate of up to 0.25% and a distribution fee at an annual
rate of up to 0.75% of the Fund's aggregate average daily net assets
attributable to the Class B or Class C shares to reimburse the Distributor for
service fees paid by it to Service Organizations and for its distribution costs.
 
  The Distributor uses the Class A, Class B and Class C service fees to
compensate Service Organizations for personal services and/or the maintenance of
shareholder accounts. Under the Class B Plan, the Distributor receives
additional payments from the Fund in the form of a distribution fee at the
annual rate of up to 0.75% of the net assets of the Class B shares as
reimbursement for (i) upfront commissions and transaction fees of up to four
percent of the purchase price for Class B shares purchased by the clients of
broker-dealers and other Service Organizations, and
 
                                       43
<PAGE>   44
 
(ii) other distribution expenses as described in the Statement of Additional
Information. Under the Class C Plan, the Distributor receives additional
payments from the Fund in the form of a distribution fee at the annual rate of
up to 0.75% of the net assets of the Class C shares as reimbursement for (i)
upfront commissions and transaction fees of up to 0.75% of the purchase price of
Class C shares purchased by the clients of broker-dealers and other Service
Organizations and ongoing commissions and transaction fees of up to 0.75% of the
average daily net assets of the Fund's Class C shares and (ii) other
distribution expenses as described in the Statement of Additional Information.
 
  In adopting the Class A Plan, the Class B Plan and the Class C Plan, the
Trustees of the Fund determined that there was a reasonable likelihood that such
Plans would benefit the Fund and its shareholders. Information with respect to
distribution and service revenues and expenses is presented to the Trustees each
year for their consideration in connection with their deliberations as to the
continuance of the Distribution Plans. In their review of the Distribution
Plans, the Trustees are asked to take into consideration expenses incurred in
connection with the distribution and servicing of each class of shares
separately. The sales charge and distribution fee, if any, of a particular class
will not be used to subsidize the sale of shares of the other classes.
 
  Service expenses accrued by the Distributor in one fiscal year may not be paid
from the Class A service fees received from the Fund in subsequent fiscal years.
Thus, if the Class A Plan were terminated or not continued, no amounts (other
than current amounts accrued but not yet paid) would be owed by the Fund to the
Distributor.
 
  The distribution fee attributable to Class B or Class C shares is designed to
permit an investor to purchase such shares without the assessment of a front-end
sales load and at the same time permit the Distributor to compensate Service
Organizations with respect to such shares. In this regard, the purpose and
function of the combined contingent deferred sales charge and distribution fee
are the same as those of the initial sales charge with respect to the Class A
shares of the Fund in that in both cases such charges provide for the financing
of the distribution of the Fund's shares.
 
  Actual distribution expenditures paid by the Distributor with respect to Class
B or Class C shares for any given year are expected to exceed the fees received
pursuant to the Class B Plan and Class C Plan and payments received pursuant to
contingent deferred sales charges. Such excess will be carried forward and may
be reimbursed by the Fund or its shareholders from payments received through
contingent deferred sales charges in future years and from payments under the
Class B Plan and Class C Plan so long as such Plans are in effect. For example,
if in a fiscal year the Distributor incurred distribution expenses under the
Class B Plan of $1 million, of which $500,000 was recovered in the form of
contingent deferred
 
                                       44
<PAGE>   45
 
sales charges paid by investors and $400,000 was reimbursed in the form of
payments made by the Fund to the Distributor under the Class B Plan, the balance
of $100,000, would be subject to recovery in future fiscal years from such
sources. For the plan year ended June 30, 1995, the unreimbursed expenses
incurred by the Distributor under the Class B Plan and carried forward were
approximately $2.5 million or 3.30% of the Class B shares' average daily net
assets. The unreimbursed expenses incurred by the Distributor under the Class C
Plan and carried forward were approximately $159,000 or 1.22% of the Class C
shares' average daily net assets.
 
  If the Class B Plan or Class C Plan was terminated or not continued, the Fund
would not be contractually obligated to pay and has no liability to the
Distributor for any expenses not previously reimbursed by the Fund or recovered
through contingent deferred sales charges.
 
- ------------------------------------------------------------------------------
DISTRIBUTIONS FROM THE FUND
- ------------------------------------------------------------------------------
 
  In addition to any increase in the value of shares which the Fund may achieve,
shareholders may receive two kinds of return from the Fund: dividends and
capital gains distributions.
 
  DIVIDENDS. Interest earned from investments is the Fund's main source of
income. Substantially all of this income, less expenses, is distributed monthly
as dividends to shareholders. Unless the shareholder instructs otherwise,
dividends are automatically applied to purchase additional shares of the Fund at
the next determined net asset value. See "Shareholder Services -- Reinvestment
Plan."
 
  The per share dividends on Class B and Class C shares will be lower than the
per share dividends on Class A shares as a result of the distribution fees and
incremental transfer agency fees applicable to such classes of shares.
 
  CAPITAL GAINS. When the Fund sells portfolio securities, it may realize
capital gains or losses, depending on whether the prices of the securities sold
are higher or lower than the prices the Fund paid to purchase them. Net realized
capital gains represent the total profit from sales of securities minus total
losses from sales of securities including losses carried forward from prior
years. The Fund distributes any taxable net realized capital gains to
shareholders annually. As in the case of income dividends, capital gains
distributions are automatically reinvested in additional shares of the Fund at
net asset value. See "Shareholder Services -- Reinvestment Plan."
 
                                       45
<PAGE>   46
 
- ------------------------------------------------------------------------------
TAX STATUS
- ------------------------------------------------------------------------------
 
  TAXES. The Fund has qualified and intends to be taxed as a regulated
investment company under the Internal Revenue Code. By qualifying as a regulated
investment company, the Fund is not subject to federal income taxes to the
extent it distributes its net investment income and net realized capital gains.
Dividends from net investment income and distributions from any net realized
short-term capital gains are taxable to shareholders as ordinary income.
Long-term capital gains distributions constitute long-term capital gains for
federal income tax purposes. All such dividends and distributions are taxable to
the shareholder whether or not reinvested in shares. However, shareholders not
subject to tax on their income will not be required to pay tax on amounts
distributed to them.
 
  Shareholders are notified annually of the federal tax status of dividends and
capital gains distributions.
 
  To avoid being subject to a 31% federal back-up withholding on dividends,
distributions and redemption payments, shareholders must furnish the Fund with a
certification of their correct taxpayer identification number.
 
  Dividends or distributions paid by the Fund will have the effect of reducing
the net asset value per share on the record date by the amount of the payment.
Therefore, a dividend or distribution paid shortly after the purchase of shares
by an investor would represent, in substance, a return of capital to the
shareholder (to the extent that it is paid on the shares so purchased) even
though subject to income taxes as discussed herein.
 
  The Fund may purchase debt securities (such as zero-coupon debt securities and
zero-fixed-coupon debt securities, see "Investment Objectives and Policies --
Lower Rated Debt Securities") that have original issue discount, which generally
is included in income ratably over the term of the security. The discount that
accrues each year on such securities thus will increase the Fund's investment
company taxable income, thereby increasing the amount that must be distributed
to satisfy the Distribution Requirement, without providing the cash with which
to make the distribution. Accordingly, the Fund may have to dispose of other
securities, thereby realizing gain or loss at a time when the Fund otherwise
might not want to do so, in order to provide the cash necessary to make
distributions to those shareholders who do not reinvest dividends.
 
  Gains or losses on the Fund's transactions in listed options on securities,
futures and options on futures generally are treated as 60% long-term and 40%
short-term, and positions held by the Fund at the end of its fiscal year
generally are required to be marked to market, with the result that unrealized
gains and losses are treated as realized. Gains and losses realized by the Fund
from writing over-the-counter options constitute short-term capital gains or
losses unless the option is exercised, in
 
                                       46
<PAGE>   47
 
which case the character of the gain or loss is determined by the holding period
of the underlying security. The Code contains certain "straddle" rules which
require deferral of losses incurred in certain transactions involving hedged
positions to the extent the Fund has unrealized gains in offsetting positions
and generally terminate the holding period of the subject position. Additional
information is set forth in the Statement of Additional Information.
 
  The foregoing is a brief summary of some of the federal income tax
considerations affecting the Fund and its investors who are U.S. residents or
U.S. corporations. Investors should consult their tax advisers for more detailed
tax advice including state and local tax considerations. Foreign investors
should consult their own counsel for further information as to the U.S. and
their country of residence or citizenship tax consequences of receipt of
dividends and distributions from the Fund.
 
  PENNSYLVANIA PERSONAL PROPERTY TAX. The Fund obtained a written letter of
determination from the Pennsylvania Department of Revenue that the Fund will be
subject to the Pennsylvania foreign franchise and corporate net income tax upon
initiating its intended business activities in Pennsylvania, and that
accordingly, Fund shares will be exempt from the Pennsylvania personal property
taxes. The Fund anticipates that it will continue such business activities but
reserves the right to suspend them at any time, resulting in the termination of
the exemption. The Fund maintains an office at Mellon Bank Center, Suite 1300,
1735 Market Street, Philadelphia, PA 19103.
 
- ------------------------------------------------------------------------------
FUND PERFORMANCE
- ------------------------------------------------------------------------------
 
  From time to time the Fund may advertise its total return for prior periods.
Any such advertisement would include at least average annual total return
quotations for one, five, and ten year periods. Other total return quotations,
aggregate or average, over other time periods may also be included.
 
  The total return of the Fund for a particular period represents the increase
(or decrease) in the value of a hypothetical investment in the Fund from the
beginning to the end of the period. Total return is calculated by subtracting
the value of the initial investment from the ending value and showing the
difference as a percentage of the initial investment; the calculation assumes
the initial investment is made at the current maximum public offering price
(which includes a maximum sales charge of 4.75% for Class A shares); that all
income dividends or capital gains distributions during the period are reinvested
in Fund shares at net asset value; and that any applicable contingent deferred
sales charge has been paid. The Fund's total return will vary depending on
market conditions, the securities comprising the Fund's portfolio, the Fund's
operating expenses and unrealized net capital gains or losses during the period.
Since shares of the Fund were offered at a maximum sales
 
                                       47
<PAGE>   48
 
charge of 6.75% prior to June 12, 1989, actual Fund total return would have been
somewhat less than that computed on the basis of the current maximum sales
charge. Total return is based on historical earnings and asset value
fluctuations and is not intended to indicate future performance. No adjustments
are made to reflect any income taxes payable by shareholders on dividends and
distributions paid by the Fund or to reflect the fact no 12b-1 fees were
incurred prior to October 1, 1989.
 
  Average annual total return quotations for periods of two or more years are
computed by finding the average annual compounded rate of return over the period
that would equate the initial amount invested to the ending redeemable value.
 
  In addition to total return information, the Fund may also advertise its
current "yield." Yield figures are based on historical earnings and are not
intended to indicate future performance. Yield is determined by analyzing the
Fund's net income per share for a 30-day (or one-month) period (which period
will be stated in the advertisement), and dividing by the maximum offering price
per share on the last day of the period. A "bond equivalent" annualization
method is used to reflect a semiannual compounding.
 
  For purposes of calculating yield quotations, net income is determined by a
standard formula prescribed by the SEC to facilitate comparison with yields
quoted by other investment companies. Net income computed for this formula
differs from net income reported by the Fund in accordance with generally
accepted accounting principles and from net income computed for federal income
tax reporting purposes. Thus the yield computed for a period may be greater or
less than the Fund's then current dividend rate.
 
  The Fund's yield is not fixed and will fluctuate in response to prevailing
interest rates and the market value of portfolio securities, and as a function
of the type of securities owned by the Fund, portfolio maturity and the Fund's
expenses.
 
  Yield quotations should be considered relative to changes in the net asset
value of the Fund's shares, the Fund's investment policies, and the risks of
investing in shares of the Fund. For example, the high yields of lower rated
bonds in which the Fund invests reflect the risk that the value of the bonds may
be impaired in a financial restructuring or default by the issuer. The
investment return and principal value of an investment in the Fund will
fluctuate so that an investor's shares, when redeemed, may be worth more or less
than their original cost.
 
  Yield and total return are calculated separately for Class A, Class B and
Class C shares. Class A total return figures include the maximum sales charge of
4.75%; Class B and Class C total return figures include any applicable
contingent deferred sales charge. Because of the differences in sales charges
and distribution fees, the total returns for each of the classes will differ.
 
                                       48
<PAGE>   49
 
  From time to time, the Fund may include in its sales literature and
shareholder reports a quotation of the current "distribution rate" for each
class of shares of the Fund. Distribution rate is a measure of the level of
income and short-term capital gain dividends, if any, distributed for a
specified period. It differs from yield, which is a measure of the income
actually earned by the Fund's investments, and from total return, which is a
measure of the income actually earned by, plus the effect of any realized and
unrealized appreciation or depreciation of, such investments during a stated
period. Distribution rate is, therefore, not intended to be a complete measure
of the Fund's performance. Distribution rate may sometimes be greater than yield
since, for instance, it may not include the effect of amortization of bond
premiums, and may include non-recurring short-term capital gains and premiums
from futures transactions engaged in by the Fund. Distribution rates will be
computed separately for each class of the Fund's shares.
 
  In reports or other communications to shareholders or in advertising material,
the Fund may compare its performance with that of other mutual funds as listed
in the ratings or rankings prepared by Lipper Analytical Services, Inc., CDA,
Morningstar Mutual Funds or similar independent services which monitor the
performance of mutual funds, with the Consumer Price Index, other appropriate
indices of investment securities, or with investment or savings vehicles. The
performance information may also include evaluations of the Fund published by
nationally recognized ranking services and by financial publications that are
nationally recognized, such as Business Week, Forbes, Fortune, Institutional
Investor, Investor's Business Daily, Kiplinger's Personal Finance Magazine,
Money, Mutual Fund Forcaster, Stanger's Investment Advisor, USA Today, U.S. News
& World Report and The Wall Street Journal. Such comparative performance
information will be stated in the same terms in which the comparative data or
indices are stated. Such advertisements and sales material may also include a
yield quotation as of a current period. In each case, such total return and
yield information, if any, will be calculated pursuant to rules established by
the SEC and will be computed separately for each class of the Fund's shares. For
these purposes, the performance of the Fund, as well as the performance of other
mutual funds or indices, do not reflect sales charges, the inclusion of which
would reduce Fund performance. The Fund will include performance data for Class
A, Class B and Class C shares of the Fund in any advertisement or information
including performance data of the Fund.
 
  The Fund may also utilize performance information in hypothetical
illustrations provided in narrative form. These hypotheticals will be
accompanied by the standard performance information required by the SEC as
described above.
 
  The Fund's Annual Report contains additional performance information. A copy
of the Annual Report may be obtained without charge by calling or writing the
Fund at the telephone number and address printed on the cover page of this
Prospectus.
 
                                       49
<PAGE>   50
 
- ------------------------------------------------------------------------------
DESCRIPTION OF SHARES OF THE FUND
- ------------------------------------------------------------------------------
 
  The Fund was originally incorporated in Texas on July 11, 1978,
re-incorporated by merger into a Maryland corporation on July 2, 1992 and
reorganized on August 5, 1995, under the laws of the state of Delaware as a
business entity commonly known as a "Delaware business trust." It is authorized
to issue an unlimited number of Class A, Class B and Class C shares of
beneficial interest of $0.01 par value. Other classes of shares may be
established from time to time in accordance with provisions of the Fund's
Declaration of Trust. Shares issued by the Fund are fully paid, non-assessable
and have no preemptive or conversion rights.
 
  The Fund currently offers three classes, designated Class A shares, Class B
shares and Class C shares. Each class of shares represents an interest in the
same assets of the Fund and generally are identical in all respects except that
each class bears certain distribution expenses and has exclusive voting rights
with respect to its distribution fee. See "Distribution Plans."
 
  The Fund is permitted to issue an unlimited number of classes. Each class of
share is equal as to earnings, assets and voting privileges, except as noted
above, and each class bears the expenses related to the distribution of its
shares. There are no conversion, preemptive or other subscription rights, except
with respect to the conversion of Class B shares and Class C shares into Class A
shares as described above. In the event of liquidation, each of the shares of
the Fund is entitled to its portion of all of the Fund's net assets after all
debt and expenses of the Fund have been paid. Since Class B shares and Class C
shares pay higher distribution expenses, the liquidation proceeds to Class B
shareholders and Class C shareholders are likely to be lower than to other
shareholders.
 
  The Fund does not contemplate holding regular meetings of shareholders to
elect Trustees or otherwise. More detailed information concerning the Fund is
set forth in the Statement of Additional Information.
 
  The Fund's Declaration of Trust provides that no Trustee, officer or
shareholder of the Fund shall be held to any personal liability, nor shall
resort be had to their private property for the satisfaction of any obligation
or liability of the Fund but the assets of the Fund only shall be liable.
 
- ------------------------------------------------------------------------------
ADDITIONAL INFORMATION
- ------------------------------------------------------------------------------
 
  This Prospectus and the Statement of Additional Information do 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.
 
                                       50
<PAGE>   51
 
  An investment in the Fund may not be appropriate for all investors.
 
  The Fund is not intended to be a complete investment program, and investors
should consider their long-term investment goals and financial needs when making
an investment decision with respect to the Fund.
 
  An investment in the Fund is intended to be a long-term investment, and should
not be used as a trading vehicle.
 
                                       51
<PAGE>   52
 
- ------------------------------------------------------------------------------
APPENDIX -- DESCRIPTION OF BOND RATINGS
- ------------------------------------------------------------------------------
 
MOODY'S INVESTORS SERVICE
 
  Aaa:  Bonds which are rated Aaa are judged to be of the best quality. They
carry the smallest degree of investment risk and are generally referred to as
"gilt edge". Interest payments are protected by a large or by an exceptionally
stable margin and principal is secure. While the various protective elements are
likely to change, such changes as can be visualized are most unlikely to impair
the fundamentally strong position of such issues.
 
  Aa:  Bonds which are rated Aa are judged to be of high quality by all
standards. Together with the Aaa group they comprise what are generally known as
high grade bonds. They are rated lower than the best bonds because margins of
protection may not be as large as in Aaa securities or fluctuation of protective
elements may be of greater amplitude or there may be other elements present
which make the long-term risks appear somewhat larger than in Aaa securities.
 
  A:  Bonds which are rated A possess many favorable investment attributes and
are to be considered as upper medium grade obligations. Factors giving security
to principal and interest are considered adequate but elements may be present
which suggest a susceptibility to impairment sometime in the future.
 
  Baa:  Bonds which are rated Baa are considered as medium grade obligations,
i.e., they are neither highly protected nor poorly secured. Interest payments
and principal security appear adequate for the present but certain protective
elements may be lacking or may be characteristically unreliable over any great
length of time. Such bonds lack outstanding investment characteristics and in
fact have speculative characteristics as well.
 
  Ba:  Bonds which are rated Ba are judged to have speculative elements; their
future cannot be considered as well assured. Often the protection of interest
and principal payments may be very moderate and thereby not well safeguarded
during other good and bad times over the future. Uncertainty of position
characterizes bonds in this class.
 
  B:  Bonds which are rated B generally lack characteristics of the desirable
investment. Assurance of interest and principal payments or of maintenance of
other terms of the contract over any long period of time may be small.
 
  Caa:  Bonds which are rated Caa are of poor standing. Such issues may be in
default or there may be present elements of danger with respect to principal or
interest.
 
  Ca:  Bonds which are rated Ca represent obligations which are speculative in a
high degree. Such issues are often in default or have other marked shortcomings.
 
                                       52
<PAGE>   53
 
  C:  Bonds which are rated C are the lowest rated class of bonds and issues so
rated can be regarded as having extremely poor prospects of ever attaining any
real investment standing.
 
  Nonrated:  Where no rating has been assigned or where a rating has been
suspended or withdrawn, it may be for reasons unrelated to the quality of the
issue.
 
  Should no rating be assigned, the reason may be one of the following:
 
  1.  An application for rating was not received or accepted.
 
  2.  The issue or issuer belongs to a group of securities that are not rated as
a matter of policy.
 
  3.  There is a lack of essential data pertaining to the issue or issuer.
 
  4.  The issue was privately placed, in which case the rating is not published
in Moody's publications.
 
  Suspension or withdrawal may occur if new and material circumstances arise,
the effects of which preclude satisfactory analysis; if there is no longer
available reasonable up-to-date data to permit a judgment to be formed; if a
bond is called for redemption; or for other reasons.
 
  Note:  Those bonds in the Aa, A, Baa, Ba and B groups which Moody's believe
possess the strongest investment attributes are designated by the symbols Aa 1,
A 1, Baa 1, Ba 1 and B 1.
 
STANDARD & POOR'S CORPORATION
 
  AAA:  Debt rated AAA has the highest rating assigned by Standard & Poor's.
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 higher 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, C: Debt rated BB, B, CCC, CC and C is regarded, on balance, as
predominantly speculative with respect to capacity to pay interest and repay
principal in accordance with the terms of the obligation. BB indicates the
lowest
 
                                       53
<PAGE>   54
 
degree of speculation and C the highest degree of speculation. While such debt
will likely have some quality and protective characteristics, these are
outweighed by large uncertainties or major risk exposures to adverse conditions.
 
  CI:  The rating CI is reserved for income bonds on which no interest is being
paid.
 
  D:  Debt rated D is in default, and payment of interest and/or repayment of
principal is in arrears.
 
  Plus (+) or Minus (-): The ratings from "AA" to "CCC" may be modified by the
addition of a plus or minus sign to show relative standing within the major
rating categories.
 
  NR:  Indicates that no rating has been requested, that there is insufficient
information on which to base a rating, or that Standard & Poor's does not rate a
particular type of obligation as a matter of policy.
 
PREFERRED STOCK RATINGS
 
  Both Moody's and Standard & Poor's use the same designations for corporate
bonds as they do for preferred stock, except in the case of Moody's preferred
stock ratings, the initial letter rating is not capitalized. While the
descriptions are tailored for preferred stocks, the relative quality
distinctions are comparable to those described above for corporate bonds.
 
                                       54
<PAGE>   55
 
EXISTING SHAREHOLDERS--
FOR INFORMATION ON YOUR
EXISTING ACCOUNT PLEASE CALL
THE FUND'S TOLL-FREE
NUMBER--(800) 421-5666
 
PROSPECTIVE INVESTORS--CALL
YOUR BROKER OR (800) 421-5666
 
DEALERS--FOR DEALER
INFORMATION, SELLING
AGREEMENTS, WIRE ORDERS,
OR REDEMPTIONS CALL THE
DISTRIBUTOR'S TOLL-FREE
NUMBER--(800) 421-5666
 
FOR SHAREHOLDER AND
DEALER INQUIRIES THROUGH
TELECOMMUNICATIONS
DEVICE FOR THE DEAF (TDD)
DIAL (800) 772-8889
 
FOR TELEPHONE TRANSACTIONS
DIAL (800) 421-5684
VAN KAMPEN AMERICAN CAPITAL
HIGH INCOME CORPORATE BOND FUND
 
- ------------------
2800 Post Oak Blvd.
Houston, TX 77056
 
- ------------------
Investment Adviser
 
VAN KAMPEN AMERICAN CAPITAL
ASSET MANAGEMENT, INC.
2800 Post Oak Blvd.
Houston, TX 77056

Distributor
 
VAN KAMPEN AMERICAN CAPITAL DISTRIBUTORS, INC.
One Parkview Plaza
Oakbrook Terrace, IL 60181

Transfer Agent
 
ACCESS INVESTOR SERVICES, INC.
P.O. Box 418256
Kansas City, MO 64141-9256

Custodian
 
STATE STREET BANK AND
TRUST COMPANY
225 Franklin Street, P.O. Box 1713
Boston, MA 02105-1713
Attn: Van Kampen American Capital Funds

Legal Counsel
 
O'MELVENY & MYERS
400 South Hope Street
Los Angeles, CA 90071

Independent Accountants
 
PRICE WATERHOUSE LLP
1201 Louisiana, Suite 2900
Houston, TX 77002
<PAGE>   56
 
                             HIGH INCOME CORPORATE
                                   BOND FUND
 
 ------------------------------------------------------------------------------
 
                              P R O S P E C T U S
                               DECEMBER 27, 1995
 
        ------  A WEALTH OF KNOWLEDGE - A KNOWLEDGE OF WEALTH  ------
                          VAN KAMPEN AMERICAN CAPITAL
    ------------------------------------------------------------------------


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