CASH ACCUMULATION TRUST
497, 1999-01-25
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<PAGE>
FUND TYPE:
- -------------------------------------
Money market
 
INVESTMENT OBJECTIVE:
- -------------------------------------
Current income to the extent
consistent with preservation of
capital and liquidity
 
                    [ICON]
CASH
ACCUMULATION
TRUST
 
- ---------------------------------------------------------------
NATIONAL MONEY MARKET FUND
PROSPECTUS: JANUARY 20, 1999
 
As with all mutual funds, the Securities and
Exchange Commission has not approved
the Fund's shares, nor has
the SEC determined that this
prospectus is complete or accurate. It is a
criminal offense
to state otherwise.                                            [LOGO] PRUDENTIAL
                                                                     INVESTMENTS
<PAGE>
TABLE OF CONTENTS
- -------------------------------------
 
<TABLE>
<S>        <C>
1          RISK/RETURN SUMMARY
1          Investment Objective and Principal Strategies
1          Principal Risks
2          Evaluating Performance
3          Fees and Expenses
 
4          HOW THE FUND INVESTS
4          Investment Objective and Policies
5          Other Investments
6          Additional Strategies
7          Investment Risks
 
9          HOW THE FUND IS MANAGED
9          Manager
9          Investment Adviser
9          Distributor
9          Year 2000 Readiness Disclosure
 
11         FUND DISTRIBUTIONS AND TAX ISSUES
11         Distributions
11         Tax Issues
 
13         HOW TO BUY AND SELL SHARES OF THE FUND
13         How to Buy Shares
15         How to Sell Your Shares
 
17         FINANCIAL HIGHLIGHTS
 
18         THE PRUDENTIAL MUTUAL FUND FAMILY
 
           FOR MORE INFORMATION (Back Cover)
</TABLE>
 
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NATIONAL MONEY MARKET FUND                    [LOGO] (800) 225-1852
<PAGE>
RISK/RETURN SUMMARY
- -------------------------------------
 
This section highlights key information about the NATIONAL MONEY MARKET FUND,
which we refer to as "the Fund." Additional information follows this summary.
 
INVESTMENT OBJECTIVE AND PRINCIPAL STRATEGIES
Our investment objective is CURRENT INCOME to the extent CONSISTENT WITH
PRESERVATION OF CAPITAL AND LIQUIDITY. To achieve this objective, we invest
primarily in commercial paper, asset-backed securities, obligations of financial
institutions and other high-quality money market instruments that mature in 13
months or less. While we make every effort to achieve our objective and maintain
a net asset value of $1 per share, we can't guarantee success. To date, the
Fund's net asset value has never deviated from $1 per share.
 
PRINCIPAL RISKS
Although we try to invest wisely, all investments involve risk. The money market
securities in which the Fund invests are generally subject to the risk that the
issuer may be unable to make principal and interest payments when they are due,
as well as the risk that either the securities could lose value because of
interest rate changes or that investors could lose confidence in the ability of
issuers in general to pay back debt. The Fund's investments in foreign
securities involve certain additional risks. For example, foreign banks and
companies generally are not subject to regulatory requirements comparable to
those applicable to U.S. banks and companies. In addition, political
developments and changes in currency rates may adversely affect the value of the
Fund's foreign securities. In all cases, however, we invest only in U.S.
dollar-denominated securities. Although investments in mutual funds involve
risk, investing in money market portfolios like the Fund is generally less risky
than investing in other types of funds. This is because the Fund invests only in
high-quality securities that mature in 13 months or less. Also, the Fund limits
the average maturity of the portfolio to 90 days or less. To satisfy the average
maturity and maximum maturity requirements, securities with demand features
 
- -------------------------------------------------------------------
MONEY MARKET FUNDS
Money market funds--which hold high-quality short-term debt obligations--
provide investors with a lower risk, highly liquid investment option. These
funds attempt to maintain a net asset value of $1 per share, although there can
be no guarantee that they will always be able to do so.
- -------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                                                                               1
<PAGE>
RISK/RETURN SUMMARY
- ------------------------------------------------
 
are treated as maturing on the date that the Fund can demand repayment of the
security.
    An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the Fund seeks to preserve the value of your investment at $1
per share, it is possible to lose money by investing in the Fund.
 
EVALUATING PERFORMANCE
A number of factors--including risk--affect how the Fund performs. The following
bar chart and table show the Fund's performance over the last year. Previous
periods during which the Fund was advised by another investment adviser are not
shown. They demonstrate the risk of investing in the Fund and how returns can
change. Past performance does not mean that the Fund will achieve similar
results in the future. For current yield information, you can call us at
(800) 225-1852.
 
ANNUAL RETURNS
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<S>                                             <C>
1998                                                5.07%
BEST QUARTER: 1.29% (4th quarter of 1998)
WORST QUARTER: 1.15% (1st quarter of 1998)
</TABLE>
 
AVERAGE ANNUAL RETURNS (AS OF 12-31-98)
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------
                                          1 YR      SINCE INCEPTION
- -----------------------------------------------------------------------
<S>                                       <C>    <C>
  Fund Shares(1)                          5.07%  5.41% (since 12-22-97)
  Lipper Average(2)                       4.84%                     N/A
  7-Day Yield (as of December 31,
   1998)(1)                               4.72%                     N/A
</TABLE>
 
1    THE FUND'S RETURNS AND YIELD ARE AFTER DEDUCTION OF EXPENSES.
2    THE LIPPER FUNDS AVERAGE IS BASED UPON THE AVERAGE RETURN OF ALL MUTUAL
     FUNDS IN THE U.S. TAXABLE MONEY MARKET FUNDS CATEGORY.
 
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2  NATIONAL MONEY MARKET FUND                              [LOGO] (800) 225-1852
<PAGE>
RISK/RETURN SUMMARY
- ------------------------------------------------
 
FEES AND EXPENSES
These tables show the fees and expenses that you may pay if you buy and hold
shares of the Fund.
 
SHAREHOLDER FEES (PAID DIRECTLY FROM YOUR INVESTMENT)
 
<TABLE>
<S>                                                 <C>
- ----------------------------------------------------------
- ----------------------------------------------------------
  Maximum sales charge (load) imposed on purchases
   (as a percentage of offering price)                None
  Maximum deferred sales charge (load)
   (as a percentage of the lower of original
   purchase price or sale proceeds)                   None
  Maximum sales charge (load) imposed on
   reinvested dividends and other distributions       None
  Redemption fees                                     None
  Exchange fee                                        None
</TABLE>
 
ANNUAL FUND OPERATING EXPENSES (DEDUCTED FROM FUND ASSETS)
 
<TABLE>
<S>                                                 <C>
- ---------------------------------------------------------
- ---------------------------------------------------------
  Management fees                                   .39%
  + Distribution (12b-1) fees                       .10%
  + Other expenses                                  .13%
  = TOTAL ANNUAL FUND OPERATING EXPENSES            .62%
</TABLE>
 
EXAMPLE
This example will help you compare the cost of investing in the Fund with the
cost of investing in other mutual funds.
    The example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions, your costs would be:
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------
                                1 YR    3 YRS    5 YRS    10 YRS
- -----------------------------------------------------------------
<S>                             <C>     <C>      <C>      <C>
  Fund shares                     $63     $199     $346      $774
</TABLE>
 
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                                                                               3
<PAGE>
HOW THE FUND INVESTS
- -------------------------------------
 
INVESTMENT OBJECTIVE AND POLICIES
The Fund's investment objective is CURRENT INCOME to the extent CONSISTENT WITH
PRESERVATION OF CAPITAL AND LIQUIDITY. While we make every effort to achieve our
objective, we can't guarantee success.
    The Fund invests in high-quality money market instruments to try to provide
investors with current income while maintaining a stable net asset value of $1
per share. We manage the Fund to comply with specific rules designed for money
market mutual funds. We will purchase obligations such as commercial paper,
asset-backed securities, certificates of deposit, time deposits of banks,
bankers' acceptances, bank notes, funding agreements and other obligations of
both banks and corporations. These obligations must be rated in one of the two
highest rating categories by at least two nationally recognized statistical
rating organizations (NRSROs), such as Moody's Investors Service (rated at least
Prime-2), Standard & Poor's Ratings Group (rated at least A-2) and Fitch IBCA
(rated at least F2) or, if unrated, of comparable quality. We may also purchase
securities of the U.S. Government and its agencies. All securities that we
purchase will be denominated in U.S. dollars.
    COMMERCIAL PAPER is short-term debt obligations of banks, corporations and
other borrowers. The obligations are usually issued by financially strong
businesses and often include a line of credit to protect purchasers of the
obligations. An ASSET-BACKED SECURITY is a loan or note that pays interest based
upon the cash flow of a pool of assets, such as mortgages, loans and credit card
receivables. CERTIFICATES OF DEPOSIT, TIME DEPOSITS, BANKERS' ACCEPTANCES and
BANK NOTES are obligations issued by or through a bank. These instruments depend
upon the strength of the bank involved in the borrowing to give investors
comfort that the borrowing will be repaid when promised. FUNDING AGREEMENTS are
contracts issued by insurance companies that guarantee a return of principal,
plus some amount of interest. When purchased by money market funds, funding
agreements will typically be short-term and provide an adjustable rate of
interest.
    DEBT OBLIGATIONS in general, including those listed above and any others
that we may purchase, are basically written promises to repay a debt. Among the
various types of debt securities we may purchase, the terms of repayment may
vary, as may the commitment of other parties to honor the obligations of the
issuer of the security. We may purchase securities that include DEMAND FEATURES,
which allow us to demand
 
- -------------------------------------------------------------------
4  NATIONAL MONEY MARKET FUND                              [LOGO] (800) 225-1852
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
repayment of a debt obligation before the obligation is due or "matures." This
means that we can purchase longer-term securities because of the expectation
that we can demand repayment of the obligation at an agreed-upon price within a
relatively short period of time. This procedure follows the rules applicable to
money market funds. We will not purchase an instrument that allows us to resell
a security, known as a "PUT," separately from the security to which it relates.
    The securities that we may purchase may change over time as new types of
money market instruments are developed. We will purchase these new instruments,
however, only if their characteristics and features follow the rules governing
the operation of money market funds.
    For more information about this Fund and its investments, see "Investment
Risks" and the Statement of Additional Information, "Descriptions of the Funds,
their Investments and Risks." The Statement of Additional Information--which we
refer to as the SAI--contains additional information about the Fund. To obtain a
copy, see the back cover of this prospectus.
    The Fund's investment objective is a fundamental policy that cannot be
changed without shareholder approval. The Board of Cash Accumulation Trust can
change investment policies that are not fundamental.
 
OTHER INVESTMENTS
The Fund may also invest in DEBT OBLIGATIONS ISSUED BY THE U.S. TREASURY.
Treasury securities have varying interest rates and maturities, but they are all
backed by the full faith and credit of the U.S. Government.
    The U.S. Treasury sometimes "strips" Treasury debt obligations into their
component parts: the Treasury's obligation to make periodic interest payments
and its obligation to repay the amount borrowed. These STRIPPED SECURITIES are
sold to investors separately. Stripped securities do not make periodic interest
payments. They are usually sold at a discount and then redeemed for their face
value on their maturity dates. These securities increase in value when interest
rates fall and lose value when interest rates rise. However, the value of
stripped securities generally fluctuates more in response to interest rate
movements than the value of traditional bonds. The Fund may try to earn money by
buying stripped securities at a discount and either selling them after they
increase in value or holding them until they mature.
 
- --------------------------------------------------------------------------------
                                                                               5
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
    The Fund may also invest in other DEBT OBLIGATIONS ISSUED OR GUARANTEED BY
THE U.S. GOVERNMENT and government-related entities. Some of these debt
securities are backed by the full faith and credit of the U.S. Government, like
obligations of the Government National Mortgage Association (GNMA or "Ginnie
Mae"). Debt securities issued by other government entities, like obligations of
the Federal National Mortgage Association (FNMA or "Fannie Mae") and the Student
Loan Marketing Association (SLMA or "Sallie Mae"), are not backed by the full
faith and credit of the U.S. Government. However, these issuers have the right
to borrow from the U.S. Treasury to meet their obligations. In contrast, the
debt securities of other issuers, like the Farm Credit System, depend entirely
upon their own resources to repay their debt.
    The Fund may also use REPURCHASE AGREEMENTS, where a party agrees to sell a
security to the Fund and then repurchase it at an agreed-upon price at a stated
time. This creates a fixed return for the Fund.
 
ADDITIONAL STRATEGIES
The Fund may use REVERSE REPURCHASE AGREEMENTS where we borrow money on a
temporary basis by selling a security with an obligation to repurchase it at an
agreed-upon price at a stated time.
    The Fund may also purchase money market obligations under a FIRM COMMITMENT
AGREEMENT. When the Fund makes this type of purchase, the price and interest
rate are fixed at the time of purchase, but delivery and payment for the
obligations take place at a later time. The Fund does not earn interest income
until the date the obligations are delivered.
    The Fund may purchase FLOATING RATE and VARIABLE RATE securities. These
securities pay interest at rates that change periodically to reflect changes in
market interest rates. Because these securities adjust the interest they pay,
they may be beneficial when interest rates are rising because of the additional
return the Fund will receive, and they may be detrimental when interest rates
are falling because of the reduction in interest payments to the Fund.
    The Fund also follows certain policies when it BORROWS MONEY (the Fund can
borrow up to 10% of the value of its total assets); LENDS ITS SECURITIES to
others; and holds ILLIQUID SECURITIES (the Fund may hold up to 10% of its net
assets in illiquid securities, including securities with legal or contractual
restrictions, those without a readily available market and repurchase
 
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6  NATIONAL MONEY MARKET FUND                              [LOGO] (800) 225-1852
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
agreements with maturities longer than seven days). The Fund is subject to
certain investment restrictions that are fundamental policies, which means they
cannot be changed without shareholder approval. For more information about these
restrictions, see the SAI.
 
INVESTMENT RISKS
As noted, all investments involve risk, and investing in the Fund is no
exception.
    The Fund's investments in money market instruments involve both CREDIT
RISK--the possibility that the issuer will default, and MARKET RISK--the risk
that an instrument will lose value because interest rates change or investors
lose confidence in the ability of issuers in general to pay back debt. To limit
these risks, we invest only in high-quality securities with short maturities of
no more than 13 months.
    Foreign securities and foreign markets involve additional risk. Foreign laws
and accounting standards typically are not as strict as they are in the U.S.
Foreign fixed-income and currency markets may be less stable than U.S. markets.
Changes in the exchange rates of foreign currencies can affect the value of
foreign assets. There is a risk that foreign companies and governments, just as
is the case in the U.S., will not be prepared to handle issues that will arise
when we reach the year 2000 if their computer systems cannot differentiate the
year 2000 from the year 1900.
 
- --------------------------------------------------------------------------------
                                                                               7
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
    This chart outlines the key risks and potential rewards of the Fund's
principal investments. See, too, "Description of the Funds, their Investments
and Risks" in the SAI.
 
INVESTMENT TYPE
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------
% OF FUND'S TOTAL ASSETS    RISKS                       POTENTIAL REWARDS
- --------------------------------------------------------------------------------
<S>                         <C>                         <C>
- --------------------------------------------------------------------------------
  HIGH-QUALITY MONEY        -- Credit risk--the risk    -- Regular interest
  MARKET OBLIGATIONS            that default of an           income
  OF ALL TYPES                  issuer would leave      -- Generally more secure
                                the Fund with unpaid        than stock since
  UP TO 100%                    interest or                 companies must pay
                                principal                   their debts before
                            -- Market risk--the risk        they pay dividends
                                that bonds and other
                                debt instruments may
                                lose value because
                                interest rates
                                change or there is a
                                lack of confidence
                                in a group of
                                borrowers or an
                                industry
- --------------------------------------------------------------------------------
  MONEY MARKET              -- Foreign markets,         -- Investors may realize
  OBLIGATIONS OF                economies and               higher returns based
  FOREIGN ISSUERS               political systems           upon higher interest
  (DOLLAR-DENOMINATED)          may not be as stable        rates paid on
                                as in the U.S.              foreign investments
  UP TO 100%                -- Differences in           -- Opportunities for
                                 foreign laws,              diversification
                                accounting standards
                                and public
                                information
                            -- Year 2000 conversion
                                may be more of a
                                problem for some
                                foreign issuers
- --------------------------------------------------------------------------------
  ILLIQUID SECURITIES       -- May be difficult to      -- May offer a more
                                value precisely             attractive yield or
  UP TO 10% OF NET          -- May be difficult to          greater potential
  ASSETS                         sell at the time or        for growth than more
                                price desired               widely traded
                                                            securities
- --------------------------------------------------------------------------------
</TABLE>
 
- -------------------------------------------------------------------
8  NATIONAL MONEY MARKET FUND                              [LOGO] (800) 225-1852
<PAGE>
HOW THE FUND IS MANAGED
- -------------------------------------
 
MANAGER
PRUDENTIAL INVESTMENTS FUND MANAGEMENT LLC (PIFM)
GATEWAY CENTER THREE, 100 MULBERRY STREET
NEWARK, NJ 07102-4077
 
    Under a management agreement with the Fund, PIFM manages the Fund's
investment operations and administers its business affairs. For the fiscal year
ended September 30, 1998, the Fund paid PIFM and PIMCO Advisors L.P., as
predecessor manager, management fees of .39% of the Fund's average net assets.
    As of November 30, 1998, PIFM served as the Manager to all 46 of the
Prudential Mutual Funds, and as Manager or administrator to 22 closed-end
investment companies, with aggregate assets of approximately $69 billion.
 
INVESTMENT ADVISER
The Prudential Investment Corporation, called Prudential Investments, is the
Fund's investment adviser. Its address is Prudential Plaza, 751 Broad Street,
Newark, NJ 07102. PIFM has responsibility for all investment advisory services,
supervises Prudential Investments and reimburses Prudential Investments for its
reasonable costs and expenses.
 
DISTRIBUTOR
Prudential Investment Management Services LLC (PIMS) distributes the Fund's
shares under a Distribution Agreement with the Fund. The Fund has a Distribution
and Service Plan under Rule 12b-1 of the Investment Company Act. Under the Plan
and the Distribution Agreement, PIMS pays the expenses of distributing the
Fund's shares and provides certain shareholder support services. The Fund
reimburses PIMS for its distribution services. These fees-- known as 12b-1
fees--are shown in the "Fees and Expenses" table.
 
YEAR 2000 READINESS DISCLOSURE
The services provided to the Fund and the shareholders by the Manager, the
Distributor, the Transfer Agent and the Custodian depend on the smooth
functioning of their computer systems and those of outside service providers.
Many computer software systems in use today cannot distinguish the year 2000
from the year 1900 because of the way dates are encoded
 
- --------------------------------------------------------------------------------
                                                                               9
<PAGE>
HOW THE FUND IS MANAGED
- ------------------------------------------------
 
and calculated. Such event could have a negative impact on handling securities
trades, payments of interest and dividends, pricing and account services. The
Manager, the Distributor, the Transfer Agent and the Custodian have advised the
Fund that they have been actively working on necessary changes to their computer
systems to prepare for the year 2000. The Fund and its Board receive and have
received since early 1998 satisfactory quarterly reports from the principal
service providers as to their preparations for year 2000 readiness, although
there can be no assurance that the service providers (or other securities market
participants) will successfully complete the necessary changes in a timely
manner or that there will be no adverse impact on the Fund. Moreover, the Fund
at this time has not considered retaining alternative service providers or
directly undertaken efforts to achieve year 2000 readiness, the latter of which
would involve substantial expenses without an assurance of success.
    Additionally, issuers of securities generally as well as those purchased by
the Fund may confront year 2000 compliance issues which, if material and not
resolved, could have an adverse impact on securities markets and/or a specific
issuer's performance and result in a decline in the value of the securities held
by the Fund.
 
- -------------------------------------------------------------------
10  NATIONAL MONEY MARKET FUND                             [LOGO] (800) 225-1852
<PAGE>
FUND DISTRIBUTIONS
AND TAX ISSUES
- -------------------------------------
 
Investors who buy shares of the Fund should be aware of some important tax
issues. For example, the Fund distributes DIVIDENDS and CAPITAL GAINS, if any,
to shareholders. These distributions are subject to taxes, unless you hold your
shares in a 401(k) plan, an Individual Retirement Account (IRA), or some other
qualified tax-deferred plan or account.
    The following briefly discusses some of the important federal tax issues you
should be aware of, but is not meant to be tax advice. For tax advice, please
speak with your tax adviser.
 
DISTRIBUTIONS
The Fund distributes DIVIDENDS of any net investment income to shareholders
every month. The dividends you receive from the Fund will be taxed as ordinary
income, whether or not they are reinvested in the Fund.
    Although the Fund is not likely to realize capital gains because of the
types of securities we purchase, any realized net CAPITAL GAINS will be paid to
shareholders--typically once a year. Capital gains are generated when the Fund
sells its assets for a profit.
    For your convenience, Fund distributions of dividends and capital gains are
AUTOMATICALLY REINVESTED in the Fund. If you ask us to pay the distributions in
cash, we will send you a check. Either way, the distributions are subject to
taxes, unless your shares are held in a qualified tax-deferred plan or account.
For more information about automatic reinvestment and other shareholder
services, see "Step 3: Additional Shareholder Services" in the next section.
 
TAX ISSUES
FORM 1099
Every year, you will receive a Form 1099, which reports the amount of dividends
and capital gains we distributed to you during the prior year. If you own shares
of the Fund as part of a qualified tax-deferred plan or account, your taxes are
deferred, so you will not receive a Form 1099. However, you will receive a Form
1099 when you take any distributions from your qualified tax-deferred plan or
account.
 
- --------------------------------------------------------------------------------
                                                                              11
<PAGE>
FUND DISTRIBUTIONS
AND TAX ISSUES
- ------------------------------------------------
 
    Fund distributions are generally taxable to you in the year they are
received, except when we declare certain dividends in December of a calendar
year and actually pay them in January of the following year. In such cases, the
dividends are treated as if they were paid on December 31 of the prior year.
 
WITHHOLDING TAXES
If federal tax law requires you to provide the Fund with your tax identification
number and certifications as to your tax status, and you fail to do this, we
will withhold and pay to the U.S. Treasury 31% of your distributions and sale
proceeds. If you are subject to backup withholding, we will withhold and pay to
the U.S. Treasury 31% of your distributions. Dividends of net investment income
and short-term capital gains paid to a nonresident foreign shareholder generally
will be subject to a U.S. withholding tax of 30%. This rate may be lower,
depending on any tax treaty the U.S. may have with the shareholder's country.
 
- -------------------------------------------------------------------
12  NATIONAL MONEY MARKET FUND                             [LOGO] (800) 225-1852
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- -------------------------------------
 
HOW TO BUY SHARES
STEP 1: OPEN AN ACCOUNT
Shares of the Fund are available only to clients of Prudential Securities
Incorporated that participate in any of the following managed account programs:
 
     --    Prudential Investments Individually Managed Accounts
 
     --    Prudential Securities Portfolio Management (PSPM)
 
     --    Quantum Portfolio Management (Quantum)
 
     --    Managed Assets Consulting Services (MACS)
 
     --    Managed Assets Consulting Services--Custom Services (MACS-- CS)
 
     --    Prudential Securities Investment Supervisory Group
 
    Eligibility to participate in any of these programs is within the discretion
of Prudential Securities. You should contact a Prudential Securities Financial
Advisor for more information. We have the right to reject any purchase order or
suspend or modify the sale of Fund shares.
 
AUTOMATIC PURCHASE (AUTOSWEEP). Shares of the Fund can only be purchased through
automatic investment procedures (the Autosweep program). The Autosweep program
allows you to designate a money market fund as your primary money sweep fund. If
you do not designate a primary money sweep fund, the Fund will automatically be
your primary money sweep fund. You have the option to change your primary money
sweep fund at any time by notifying your Prudential Securities Financial
Advisor.
    When your Prudential Securities account has a credit balance (that is,
immediately available funds), Prudential Securities will purchase shares of the
Fund equal to that amount. This will occur on the business day following the
existence of a credit balance. Prudential Securities may use and retain the
benefit of credit balances in your account until Fund shares are purchased (that
is, until the next business day).
    Credit balances of $1 or more in your account will automatically be invested
in shares of the Fund. Where your credit balance results from a sale of
securities, the available cash will be invested in the Fund on settlement date.
Where your credit balance results from any other transaction (that is, receipt
of a dividend or interest payment, maturity of a bond or your own cash payment
to your securities account), the available
 
- --------------------------------------------------------------------------------
                                                                              13
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- ------------------------------------------------
cash will be invested in the Fund on the first business day after it is received
by Prudential Securities. All available cash in your account, regardless of its
source, will automatically be invested.
    You will begin earning dividends on your shares purchased through Autosweep
on the day the order is placed. Prudential Securities will purchase shares of
the Fund at 4:30 p.m. New York Time on the business day the order is placed and
payment for the shares will be made by 4:30 p.m. New York Time on the next
business day.
    Your investment in the Fund will be held in the name of Prudential
Securities. Prudential Securities will receive all statements and dividends from
the Fund and will, in turn, send you account statements showing your purchases,
sales and dividends.
 
STEP 2: UNDERSTANDING THE PRICE YOU'LL PAY
When you invest in a mutual fund, you buy shares of the Fund. Shares of a money
market fund, like the Fund, are priced differently than shares of common stock
and other securities.
    The share value of a mutual fund--known as the NET ASSET VALUE or NAV--is
determined by a simple calculation: it's the total value of the Fund (assets
minus liabilities) divided by the total number of shares outstanding. In
determining NAV, the Fund values its securities using the amortized cost method.
The Fund seeks to maintain a NAV of $1.
    We determine the NAV of our shares once each business day at 4:30 p.m. New
York Time on days that the New York Stock Exchange is open for trading. We do
not determine NAV on days when we have not received any orders to purchase or
sell Fund shares, or when changes in the value of the Fund's portfolio do not
materially affect the NAV.
 
STEP 3: ADDITIONAL SHAREHOLDER SERVICES
As a Fund shareholder, you can take advantage of the following services and
privileges:
 
AUTOMATIC REINVESTMENT. As we explained in the Fund Distributions and Tax Issues
section, the Fund pays out--or distributes--its net investment income and
capital gains to all shareholders. For your convenience, we will automatically
reinvest your distributions in the Fund at NAV. If you want your distributions
paid in cash, you can indicate this preference on your
 
- -------------------------------------------------------------------
14  NATIONAL MONEY MARKET FUND                             [LOGO] (800) 225-1852
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- ------------------------------------------------
 
application, or notify your Prudential Securities Financial Advisor at least
five business days before the date we determine who receives dividends.
 
REPORTS TO SHAREHOLDERS. Every year we will send you an annual report (along
with an updated prospectus) and a semi-annual report, which contain important
financial information about the Fund. To reduce Fund expenses, we will send one
annual shareholder report, one semi-annual shareholder report and one annual
prospectus per household, unless you instruct us otherwise.
 
HOW TO SELL YOUR SHARES
You can sell your shares of the Fund for cash (in the form of a check) at any
time, subject to certain restrictions.
    When you sell shares of the Fund--also known as redeeming your shares--the
price you will receive will be the NAV next determined after we receive your
order to sell. Prudential Securities must receive your order to sell by 4:30
p.m. New York Time to process the sale on that day.
    Generally, we will pay you for the shares that you sell within seven days
after we receive your sell order.
 
RESTRICTIONS ON SALES
There are certain times when you may not be able to sell shares of the Fund, or
when we may delay paying you the proceeds from a sale. This may happen during
unusual market conditions or emergencies when the Fund can't determine the value
of its assets or sell its holdings. For more information, see the SAI, "Purchase
and Redemption of Fund Shares--Sale of Shares."
 
REDEMPTION IN KIND
If the sales of Fund shares you make during any 90-day period reach the lesser
of $250,000 or 1% of the value of the Fund's net assets, we can then give you
securities from the Fund's portfolio instead of cash. If you want to sell the
securities for cash, you would have to pay the costs charged by a broker.
 
- --------------------------------------------------------------------------------
                                                                              15
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- ------------------------------------------------
 
AUTOMATIC REDEMPTION FOR AUTOSWEEP
Your Fund shares will be automatically redeemed to cover any deficit in your
Prudential Securities account. The amount redeemed will be the nearest dollar
amount necessary to cover the deficit.
    The amount of the redemption will be the lesser of the total value of Fund
shares held in your Prudential Securities account or the deficit in your
Prudential Securities account. If you want to pay for a securities transaction
in your account other than through this procedure, you must deposit sufficient
cash in your securities account BEFORE THE SETTLEMENT DATE. If you want to pay
any other deficit in your securities account other than through this procedure,
you must deposit sufficient cash in your securities account BEFORE YOU INCUR THE
DEFICIT.
    Redemptions are automatically made by Prudential Securities, to the nearest
dollar, on each day to satisfy deficits from securities transactions or to honor
your redemption requests. Your account will be automatically scanned for
deficits each day and, if there is insufficient cash in your account, we will
redeem an appropriate number of shares of the Fund at the next determined NAV to
satisfy any remaining deficit. You are entitled to any dividend declared on the
redeemed shares through the day before the redemption is made. Dividends
declared on the redemption date will be retained by Prudential Securities, which
has advanced monies to satisfy deficits in your account.
 
- -------------------------------------------------------------------
16  NATIONAL MONEY MARKET FUND                             [LOGO] (800) 225-1852
<PAGE>
FINANCIAL HIGHLIGHTS
- -------------------------------------
 
The financial highlights will help you evaluate the Fund's financial
performance. The TOTAL RETURN in the chart represents the rate that a
shareholder earned on an investment in the Fund, assuming reinvestment of all
dividends and other distributions. The information is for shares of the Fund for
the periods indicated.
    Review this chart with the financial statements and report of independent
accountants which appear in the annual report and the SAI and are available upon
request. Additional performance information is contained in the annual report,
which you can receive at no charge.
    The financial highlights for the two years ended September 30, 1998 were
audited by PricewaterhouseCoopers LLP, independent accountants, and the
financial highlights for the three years ended September 30, 1996 were audited
by other independent auditors. Their reports were unqualified.
 
NATIONAL MONEY MARKET FUND (FISCAL YEAR ENDED 9-30-98)
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------
PER SHARE OPERATING PERFORMANCE       1998      1997      1996      1995      1994
- ------------------------------------------------------------------------------------
<S>                                  <C>       <C>       <C>       <C>       <C>
 NET ASSET VALUE, BEGINNING OF YEAR    $1.00     $1.00     $1.00     $1.00     $1.00
 INCOME FROM INVESTMENT OPERATIONS:
 Net investment income and net
  realized gains                         .05       .05       .05       .05       .03
 Dividends and distributions to
  shareholders                          (.05)     (.05)     (.05)     (.05)     (.03)
 Net asset value, end of year          $1.00     $1.00     $1.00     $1.00     $1.00
 TOTAL RETURN(1)                        5.2%      5.0%      5.0%      5.2%      3.2%
- ------------------------------------------------------------------------------------
 RATIOS/SUPPLEMENTAL DATA               1998      1997      1996      1995      1994
- ------------------------------------------------------------------------------------
 NET ASSETS, END OF YEAR (000)       $507,288  $702,003  $652,327  $685,228  $823,343
 RATIOS TO AVERAGE NET ASSETS:
 Net investment income                 5.05%     4.89%     4.86%     5.15%     3.20%
 Expenses                               .62%      .65%      .69%      .69%      .61%
</TABLE>
 
1    TOTAL RETURN ASSUMES REINVESTMENT OF DIVIDENDS AND DISTRIBUTIONS. IT IS
     CALCULATED ASSUMING SHARES ARE PURCHASED ON THE FIRST DAY AND SOLD ON THE
     LAST DAY OF EACH YEAR REPORTED.
 
- --------------------------------------------------------------------------------
                                                                              17
<PAGE>
THE PRUDENTIAL MUTUAL FUND FAMILY
- -------------------------------------
 
Prudential offers a broad range of mutual funds designed to meet your individual
needs. For information about these funds, contact your financial adviser or call
us at (800) 225-1852. Read the prospectus carefully before you invest or send
money.
 
STOCK FUNDS
PRUDENTIAL DISTRESSED SECURITIES FUND, INC.
PRUDENTIAL EMERGING GROWTH FUND, INC.
PRUDENTIAL EQUITY FUND, INC.
PRUDENTIAL EQUITY INCOME FUND
PRUDENTIAL INDEX SERIES FUND
  PRUDENTIAL SMALL-CAP INDEX FUND
  PRUDENTIAL STOCK INDEX FUND
THE PRUDENTIAL INVESTMENT PORTFOLIOS, INC.
  PRUDENTIAL JENNISON GROWTH FUND
  PRUDENTIAL JENNISON GROWTH & INCOME FUND
PRUDENTIAL MID-CAP VALUE FUND
PRUDENTIAL REAL ESTATE SECURITIES FUND
PRUDENTIAL SMALL-CAP QUANTUM FUND, INC.
PRUDENTIAL SMALL COMPANY VALUE FUND, INC.
PRUDENTIAL 20/20 FOCUS FUND
PRUDENTIAL UTILITY FUND, INC.
NICHOLAS-APPLEGATE FUND, INC.
  NICHOLAS-APPLEGATE GROWTH EQUITY FUND
 
ASSET ALLOCATION/BALANCED FUNDS
PRUDENTIAL BALANCED FUND
PRUDENTIAL DIVERSIFIED FUNDS
  CONSERVATIVE GROWTH FUND
  MODERATE GROWTH FUND
  HIGH GROWTH FUND
THE PRUDENTIAL INVESTMENT PORTFOLIOS, INC.
  PRUDENTIAL ACTIVE BALANCED FUND
 
GLOBAL FUNDS
GLOBAL STOCK FUNDS
PRUDENTIAL DEVELOPING MARKETS FUND
  PRUDENTIAL DEVELOPING MARKETS EQUITY FUND
  PRUDENTIAL LATIN AMERICA EQUITY FUND
PRUDENTIAL EUROPE GROWTH FUND, INC.
PRUDENTIAL GLOBAL GENESIS FUND, INC.
PRUDENTIAL INDEX SERIES FUND
  PRUDENTIAL EUROPE INDEX FUND
  PRUDENTIAL PACIFIC INDEX FUND
PRUDENTIAL NATURAL RESOURCES
  FUND, INC.
PRUDENTIAL PACIFIC GROWTH FUND, INC.
PRUDENTIAL WORLD FUND, INC.
  GLOBAL SERIES
  INTERNATIONAL STOCK SERIES
GLOBAL UTILITY FUND, INC.
 
GLOBAL BOND FUNDS
PRUDENTIAL GLOBAL LIMITED MATURITY
  FUND, INC.
  LIMITED MATURITY PORTFOLIO
PRUDENTIAL INTERMEDIATE GLOBAL
  INCOME FUND, INC.
PRUDENTIAL INTERNATIONAL BOND
  FUND, INC.
THE GLOBAL TOTAL RETURN FUND, INC.
 
- -------------------------------------------------------------------
18  NATIONAL MONEY MARKET FUND                             [LOGO] (800) 225-1852
<PAGE>
- -------------------------------------
 
BOND FUNDS
TAXABLE BOND FUNDS
PRUDENTIAL DIVERSIFIED BOND FUND, INC.
PRUDENTIAL GOVERNMENT INCOME FUND, INC.
PRUDENTIAL GOVERNMENT SECURITIES TRUST
  SHORT-INTERMEDIATE TERM SERIES
PRUDENTIAL HIGH YIELD FUND, INC.
PRUDENTIAL HIGH YIELD TOTAL RETURN FUND, INC.
PRUDENTIAL INDEX SERIES FUND
  PRUDENTIAL BOND MARKET INDEX FUND
PRUDENTIAL STRUCTURED MATURITY
  FUND, INC.
  INCOME PORTFOLIO
 
TAX-EXEMPT BOND FUNDS
PRUDENTIAL CALIFORNIA MUNICIPAL FUND
  CALIFORNIA SERIES
  CALIFORNIA INCOME SERIES
PRUDENTIAL MUNICIPAL BOND FUND
  HIGH INCOME SERIES
  INSURED SERIES
PRUDENTIAL MUNICIPAL SERIES FUND
  FLORIDA SERIES
  MASSACHUSETTS SERIES
  NEW JERSEY SERIES
  NEW YORK SERIES
  NORTH CAROLINA SERIES
  OHIO SERIES
  PENNSYLVANIA SERIES
PRUDENTIAL NATIONAL MUNICIPALS FUND, INC.
 
MONEY MARKET FUNDS
TAXABLE MONEY MARKET FUNDS
CASH ACCUMULATION TRUST
  LIQUID ASSETS FUND
  NATIONAL MONEY MARKET FUND
PRUDENTIAL GOVERNMENT SECURITIES TRUST
  MONEY MARKET SERIES
  U.S. TREASURY MONEY MARKET SERIES
PRUDENTIAL SPECIAL MONEY MARKET FUND, INC.
  MONEY MARKET SERIES
PRUDENTIAL MONEYMART ASSETS, INC.
 
TAX-FREE MONEY MARKET FUNDS
PRUDENTIAL TAX-FREE MONEY FUND, INC.
PRUDENTIAL CALIFORNIA MUNICIPAL FUND
  CALIFORNIA MONEY MARKET SERIES
PRUDENTIAL MUNICIPAL SERIES FUND
  CONNECTICUT MONEY MARKET SERIES
  MASSACHUSETTS MONEY MARKET SERIES
  NEW JERSEY MONEY MARKET SERIES
  NEW YORK MONEY MARKET SERIES
 
COMMAND FUNDS
COMMAND MONEY FUND
COMMAND GOVERNMENT FUND
COMMAND TAX-FREE FUND
 
INSTITUTIONAL MONEY MARKET FUNDS
PRUDENTIAL INSTITUTIONAL LIQUIDITY PORTFOLIO, INC.
  INSTITUTIONAL MONEY MARKET SERIES
 
- --------------------------------------------------------------------------------
                                                                              19
<PAGE>
                 [This page has been left blank intentionally.]
 
- -------------------------------------------------------------------
20  NATIONAL MONEY MARKET FUND                             [LOGO] (800) 225-1852
<PAGE>
                 [This page has been left blank intentionally.]
 
- --------------------------------------------------------------------------------
                                                                              21
<PAGE>
FOR MORE INFORMATION
- --------------------------------------------------------------------------------
 
Please read this prospectus before you invest in the Fund and keep it for future
reference. For information or shareholder questions contact:
 
PRUDENTIAL MUTUAL FUND SERVICES LLC
P.O. BOX 15005
NEW BRUNSWICK, NJ 08906-5005
(800) 225-1852
(732) 417-7555
  (if calling from outside the U.S.)
 
- --------------------------------
Outside Brokers Should Contact:
PRUDENTIAL INVESTMENT MANAGEMENT SERVICES LLC
P.O. BOX 15035
NEW BRUNSWICK, NJ 08906-5035
(800) 778-8769
 
- ------------------------------------
Visit Prudential's Web Site At:
http://www.prudential.com
 
- --------------------------------
Additional information about the Fund can be obtained without charge and can be
found in the following documents:
 
STATEMENT OF ADDITIONAL INFORMATION (SAI)
 (incorporated by reference into this prospectus)
 
ANNUAL REPORT
 
SEMI-ANNUAL REPORT
 
You can also obtain copies of Fund documents from the Securities and Exchange
Commission as follows:
 
By Mail:
Securities and Exchange Commission
Public Reference Section
Washington, DC 20549-6009
  (The SEC charges a fee to copy documents.)
 
In Person:
Public Reference Room in
Washington, DC
  (For hours of operation, call 1(800) SEC-0330)
 
Via the Internet:
http://www.sec.gov
 
- --------------------------------
CUSIP Number:
147541106
 
Investment Company Act File No:
 
811-4060
 
MF178A                                   [LOGO] Printed on Recycled Paper
<PAGE>
FUND TYPE:
- -------------------------------------
Money market
 
INVESTMENT OBJECTIVE:
- -------------------------------------
Current income to the extent
consistent with preservation of
capital and liquidity
 
                    [ICON]
CASH
ACCUMULATION
TRUST
 
- ---------------------------------------------------------------
LIQUID ASSETS FUND
PROSPECTUS: JANUARY 20, 1999
 
As with all mutual funds, the Securities and
Exchange Commission has not approved
the Fund's shares, nor has
the SEC determined that this
prospectus is complete or
accurate. It is a criminal offense
to state otherwise.                                            [LOGO] PRUDENTIAL
                                                                     INVESTMENTS
<PAGE>
TABLE OF CONTENTS
- -------------------------------------
 
<TABLE>
<S>        <C>
1          RISK/RETURN SUMMARY
1          Investment Objective and Principal Strategies
1          Principal Risks
2          Evaluating Performance
3          Fees and Expenses
 
4          HOW THE FUND INVESTS
4          Investment Objective and Policies
5          Other Investments
6          Additional Strategies
7          Investment Risks
 
9          HOW THE FUND IS MANAGED
9          Manager
9          Investment Adviser
9          Distributor
9          Year 2000 Readiness Disclosure
 
11         FUND DISTRIBUTIONS AND TAX ISSUES
11         Distributions
11         Tax Issues
 
13         HOW TO BUY AND SELL SHARES OF THE FUND
13         How to Buy Shares
15         How to Sell Your Shares
 
17         FINANCIAL HIGHLIGHTS
 
18         THE PRUDENTIAL MUTUAL FUND FAMILY
 
           FOR MORE INFORMATION (Back Cover)
</TABLE>
 
- -------------------------------------------------------------------
LIQUID ASSETS FUND                            [LOGO] (800) 225-1852
<PAGE>
RISK/RETURN SUMMARY
- -------------------------------------
 
This section highlights key information about the LIQUID ASSETS FUND, which we
refer to as "the Fund." Additional information follows this summary.
 
INVESTMENT OBJECTIVE AND PRINCIPAL STRATEGIES
Our investment objective is CURRENT INCOME to the extent CONSISTENT WITH
PRESERVATION OF CAPITAL AND LIQUIDITY. To achieve this objective we invest
primarily in commercial paper, asset-backed securities, obligations of financial
institutions and other high-quality money market instruments that mature in 13
months or less. While we make every effort to achieve our objective and maintain
a net asset value of $1 per share, we can't guarantee success. To date, the
Fund's net asset value has never deviated from $1 per share.
 
PRINCIPAL RISKS
Although we try to invest wisely, all investments involve risk. The money market
securities in which the Fund invests are generally subject to the risk that the
issuer may be unable to make principal and interest payments when they are due,
as well as the risk that either the securities could lose value because of
interest rate changes or that investors could lose confidence in the ability of
issuers in general to pay back debt. The Fund's investments in foreign
securities involve certain additional risks. For example, foreign banks and
companies generally are not subject to regulatory requirements comparable to
those applicable to U.S. banks and companies. In addition, political
developments and changes in currency rates may adversely affect the value of the
Fund's foreign securities. In all cases, however, we invest only in U.S.
dollar-denominated securities. Although investments in mutual funds involve
risk, investing in money market portfolios like the Fund are generally less
risky than investments in other types of funds. This is because the Fund may
only invest in high-quality securities that mature in 13 months or less. Also,
the Fund limits the average maturity of the portfolio to 90 days or less. To
satisfy the average maturity and maximum maturity requirements, securities with
demand
 
- -------------------------------------------------------------------
MONEY MARKET FUNDS
Money market funds--which hold high-quality short-term debt obligations--
provide investors with a lower risk, highly liquid investment option. These
funds attempt to maintain a net asset value of $1 per share, although there can
be no guarantee that they will always be able to do so.
- -------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                                                                               1
<PAGE>
RISK/RETURN SUMMARY
- ------------------------------------------------
 
features are treated as maturing on the date that the Fund can demand repayment
of the security.
    An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the Fund seeks to preserve the value of your investment at $1
per share, it is possible to lose money by investing in the Fund.
 
EVALUATING PERFORMANCE
    A number of factors--including risk--affect how the Fund performs. The
following bar chart and table show the Fund's performance over the last year.
They demonstrate the risk of investing in the Fund and how returns can change.
Past performance does not mean that the Fund will achieve similar results in the
future. For current yield information, you can call us at (800) 225-1852.
 
ANNUAL RETURNS
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<S>                                             <C>
1998                                                5.52%
BEST QUARTER: 1.41% (4th quarter of 1998)
WORST QUARTER: 1.24% (1st quarter of 1998)
</TABLE>
 
AVERAGE ANNUAL RETURNS (AS OF 12-31-98)
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------
                                 1 YR      SINCE INCEPTION
- --------------------------------------------------------------
<S>                             <C>     <C>
  Fund Shares(1)                 5.52%   5.56% (since 12-22-97)
  Lipper Average(2)              4.84%                     N/A
  7-Day Yield (as of December
   31, 1998)(1)                  5.18%                     N/A
</TABLE>
 
1.   THE FUND'S RETURNS AND YIELD ARE AFTER DEDUCTION OF EXPENSES.
2.   THE LIPPER FUNDS AVERAGE IS BASED UPON THE AVERAGE RETURN OF ALL MUTUAL
     FUNDS IN THE U.S. TAXABLE MONEY MARKET FUNDS CATEGORY.
 
- -------------------------------------------------------------------
2  LIQUID ASSETS FUND                                      [LOGO] (800) 225-1852
<PAGE>
RISK/RETURN SUMMARY
- ------------------------------------------------
 
FEES AND EXPENSES
These tables show the fees and expenses that you may pay if you buy and hold
shares of the Fund.
 
SHAREHOLDER FEES (PAID DIRECTLY FROM YOUR INVESTMENT)
 
<TABLE>
<S>                                  <C>
- -----------------------------------------------
- -----------------------------------------------
  Maximum sales charge (load)
   imposed on purchases (as a
   percentage of offering price)           None
  Maximum deferred sales charge
   (load) (as a percentage of the
   lower of original purchase price
   or sale proceeds)                       None
  Maximum sales charge (load)
   imposed on reinvested dividends
   and other distributions                 None
  Redemption fees                          None
  Exchange fee                             None
</TABLE>
 
ANNUAL FUND OPERATING EXPENSES (DEDUCTED FROM FUND ASSETS)
 
<TABLE>
<S>                                                 <C>
- ----------------------------------------------------------
- ----------------------------------------------------------
  Management fees                                   .07%(1)
  + Distribution and service (12b-1) fees             None
  + Other expenses                                    .14%
  = Total annual Fund operating expenses            .21%(1)
</TABLE>
 
1    THE FEES PAID BY THE FUND TO THE MANAGER AND THE FUND'S OTHER AFFILIATED
     SERVICE PROVIDERS ARE LIMITED TO REIMBURSEMENT FOR DIRECT COSTS, EXCLUDING
     ANY PROFIT OR OVERHEAD, PURSUANT TO AGREEMENTS WITH THE FUND. MANAGEMENT
     FEES AND TOTAL ANNUAL FUND OPERATING EXPENSES REFLECT THESE FEES FOR THE
     FUND'S FISCAL YEAR ENDED SEPTEMBER 30, 1998.
 
EXAMPLE
This example will help you compare the cost of investing in the Fund with the
cost of investing in other mutual funds.
    The example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions, your costs would be:
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------
                                1 YR    3 YRS    5 YRS    10 YRS
- -----------------------------------------------------------------
<S>                             <C>     <C>      <C>      <C>
  Fund shares                     $22      $68     $118      $268
</TABLE>
 
- --------------------------------------------------------------------------------
                                                                               3
<PAGE>
HOW THE FUND INVESTS
- -------------------------------------
 
INVESTMENT OBJECTIVE AND POLICIES
The Fund's investment objective is CURRENT INCOME to the extent CONSISTENT WITH
PRESERVATION OF CAPITAL AND LIQUIDITY. While we make every effort to achieve our
objective, we can't guarantee success.
    The Fund invests in high-quality money market instruments to try to provide
investors with current income while maintaining a stable net asset value of $1
per share. We manage the Fund to comply with specific rules designed for money
market mutual funds. We will purchase obligations such as commercial paper,
asset-backed securities, certificates of deposit, time deposits of banks,
bankers' acceptances, bank notes, funding agreements and other obligations of
both banks and corporations. These obligations must be rated in one of the two
highest rating categories by at least two nationally recognized statistical
rating organizations (NRSROs), such as Moody's Investors Service (rated at least
Prime-2), Standard & Poor's Ratings Group (rated at least A-2) and Fitch IBCA
(rated at least F2) or, if unrated, of comparable quality. We may also purchase
securities of the U.S. Government and its agencies. All securities that we
purchase will be denominated in U.S. dollars.
    COMMERCIAL PAPER is short-term debt obligations of banks, corporations and
other borrowers. The obligations are usually issued by financially strong
businesses and often include a line of credit to protect purchasers of the
obligations. An ASSET-BACKED SECURITY is a loan or note that pays interest based
upon the cash flow of a pool of assets, such as mortgages, loans and credit card
receivables. CERTIFICATES OF DEPOSIT, TIME DEPOSITS, BANKERS' ACCEPTANCES and
BANK NOTES are obligations issued by or through a bank. These instruments depend
upon the strength of the bank involved in the borrowing to give investors
comfort that the borrowing will be repaid when promised. FUNDING AGREEMENTS are
contracts issued by insurance companies that guarantee a return of principal,
plus some amount of interest. When purchased by money market funds, funding
agreements will typically be short-term and provide an adjustable rate of
interest.
    DEBT OBLIGATIONS in general, including those listed above and any others
that we may purchase, are basically written promises to repay a debt. Among the
various types of debt securities we may purchase, the terms of repayment may
vary, as may the commitment of other parties to honor the obligations of the
issuer of the security. We may purchase securities that include DEMAND FEATURES,
which allow us to demand
 
- -------------------------------------------------------------------
4  LIQUID ASSETS FUND                                      [LOGO] (800) 225-1852
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
repayment of a debt obligation before the obligation is due or "matures." This
means that we can purchase longer-term securities because of the expectation
that we can demand repayment of the obligation at an agreed-upon price within a
relatively short period of time. This procedure follows the rules applicable to
money market funds.
    The securities that we may purchase may change over time as new types of
money market instruments are developed. We will purchase these new instruments,
however, only if their characteristics and features follow the rules governing
the operation of money market funds.
    Any of the money market instruments that the Fund may purchase may be
accompanied with the right to resell the instrument prior to the instrument's
maturity. In addition, we may separately purchase rights to resell these
instruments. These rights are referred to as "PUTS." The purchase of instruments
with puts allows the Fund to sell the security when the investment adviser
believes it is appropriate to do so to honor redemption requests or to buy more
attractive securities.
    For more information about this Fund and its investments, see "Investment
Risks" and the Statement of Additional Information, "Description of the Funds,
their Investments and Risks." The Statement of Additional Information--which we
refer to as the SAI--contains additional information about the Fund. To obtain a
copy, see the back cover of this prospectus.
    The Fund's investment objective is a fundamental policy that cannot be
changed without shareholder approval. The Board of Cash Accumulation Trust can
change investment policies that are not fundamental.
 
OTHER INVESTMENTS
The Fund may also invest in DEBT OBLIGATIONS ISSUED BY THE U.S. TREASURY.
Treasury securities have varying interest rates and maturities, but they are all
backed by the full faith and credit of the U.S. Government.
    The U.S. Treasury sometimes "strips" Treasury debt obligations into their
component parts: the Treasury's obligation to make periodic interest payments
and its obligation to repay the amount borrowed. These STRIPPED SECURITIES are
sold to investors separately. Stripped securities do not make periodic interest
payments. They are usually sold at a discount and then redeemed for their face
value on their maturity dates. These securities increase in value when interest
rates fall and lose value when interest rates
 
- --------------------------------------------------------------------------------
                                                                               5
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
rise. However, the value of stripped securities generally fluctuates more in
response to interest rate movements than the value of traditional bonds. The
Fund may try to earn money by buying stripped securities at a discount and
either selling them after they increase in value or holding them until they
mature.
    The Fund may also invest in other DEBT OBLIGATIONS ISSUED OR GUARANTEED BY
THE U.S. GOVERNMENT and government-related entities. Some of these debt
securities are backed by the full faith and credit of the U.S. Government, like
obligations of the Government National Mortgage Association (GNMA or "Ginnie
Mae"). Debt securities issued by other government entities, like obligations of
the Federal National Mortgage Association (FNMA or "Fannie Mae") and the Student
Loan Marketing Association (SLMA or "Sallie Mae"), are not backed by the full
faith and credit of the U.S. Government. However, these issuers have the right
to borrow from the U.S. Treasury to meet their obligations. In contrast, the
debt securities of other issuers, like the Farm Credit System, depend entirely
upon their own resources to repay their debt.
    The Fund may also use REPURCHASE AGREEMENTS, where a party agrees to sell a
security to the Fund and then repurchase it at an agreed-upon price at a stated
time. This creates a fixed return for the Fund.
 
ADDITIONAL STRATEGIES
The Fund may use REVERSE REPURCHASE AGREEMENTS where we borrow money on a
temporary basis by selling a security with an obligation to repurchase it at an
agreed-upon price at a stated time.
    The Fund may also purchase money market obligations on a "WHEN-ISSUED" or
"DELAYED-DELIVERY" basis. When the Fund makes this type of purchase, the price
and interest rate are fixed at the time of purchase, but delivery and payment
for the obligations take place at a later time. The Fund does not earn interest
income until the date the obligations are delivered.
    The Fund may purchase FLOATING RATE and VARIABLE RATE securities. These
securities pay interest at rates that change periodically to reflect changes in
market interest rates. Because these securities adjust the interest they pay,
they may be beneficial when interest rates are rising because of the additional
return the Fund will receive, and they may be detrimental when interest rates
are falling because of the reduction in interest payments
 
- -------------------------------------------------------------------
6  LIQUID ASSETS FUND                                      [LOGO] (800) 225-1852
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
to the Fund.
    The Fund also follows certain policies when it BORROWS MONEY (the Fund can
borrow up to 33 1/3% of the value of its total assets); LENDS ITS SECURITIES to
others (the Fund may lend up to 33 1/3% of the value of its total assets,
including collateral received in the transaction); and holds ILLIQUID SECURITIES
(the Fund may hold up to 10% of its net assets in illiquid securities, including
securities with legal or contractual restrictions, those without a readily
available market and repurchase agreements with maturities longer than seven
days). The Fund is subject to certain investment restrictions that are
fundamental policies, which means they cannot be changed without shareholder
approval. For more information about these restrictions, see the SAI.
 
INVESTMENT RISKS
As noted, all investments involve risk, and investing in the Fund is no
exception.
    The Fund's investments in money market instruments involve both CREDIT
RISK--the possibility that the issuer will default, and MARKET RISK--the risk
that an instrument will lose value because interest rates change or investors
lose confidence in the ability of issuers in general to pay back debt. To limit
these risks, we invest only in high-quality securities with short maturities of
no more than 13 months.
    Foreign securities and foreign markets involve additional risk. Foreign laws
and accounting standards typically are not as strict as they are in the U.S.
Foreign fixed-income and currency markets may be less stable than U.S. markets.
Changes in the exchange rates of foreign currencies can affect the value of
foreign assets. There is a risk that foreign companies and governments, just as
is the case in the U.S., will not be prepared to handle issues that will arise
when we reach the year 2000 if their computer systems cannot differentiate the
year 2000 from the year 1900.
 
- --------------------------------------------------------------------------------
                                                                               7
<PAGE>
HOW THE FUND INVESTS
- ------------------------------------------------
 
    This chart outlines the key risks and potential rewards of the Fund's
principal investments. See, too, "Description of the Funds, their Investments
and Risks" in the SAI.
INVESTMENT TYPE
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------
% OF FUND'S TOTAL ASSETS    RISKS                                  POTENTIAL REWARDS
- -----------------------------------------------------------------------------------
<S>                         <C>                                    <C>
- ------------------------------------------------------------------------------------
  HIGH-QUALITY MONEY        -- Credit risk--the risk that          -- Regular interest income
  MARKET OBLIGATIONS            default of an issuer would         -- Generally more secure than stock
  OF ALL TYPES                  leave the Fund with unpaid             since companies must pay their
                                interest or principal                  debts before they pay dividends
  UP TO 100%                -- Market risk--the risk that bonds
                                and other debt instruments may
                                lose value because interest
                                rates change or there is a lack
                                of confidence in a group of
                                borrowers or an industry
- ------------------------------------------------------------------------------------
  MONEY MARKET              -- Foreign markets, economies and      -- Investors may realize higher
  OBLIGATIONS OF                political systems may not be as        returns based upon higher
  FOREIGN ISSUERS               stable as in the U.S.                  interest rates paid on foreign
  (DOLLAR-DENOMINATED)      -- Differences in foreign laws,            investments
                                accounting standards and public    -- Opportunities for
  UP TO 100%                    information                            diversification
                            -- Year 2000 conversion may be more
                                of a problem for some foreign
                                issuers
- ------------------------------------------------------------------------------------
  ILLIQUID SECURITIES       -- May be difficult to value           -- May offer a more attractive
                                precisely                              yield or greater potential for
  UP TO 10% OF NET          -- May be difficult to sell at the         growth than more widely traded
  ASSETS                        time or price desired                  securities
- ------------------------------------------------------------------------------------
</TABLE>
 
- -------------------------------------------------------------------
8  LIQUID ASSETS FUND                                      [LOGO] (800) 225-1852
<PAGE>
HOW THE FUND IS MANAGED
- -------------------------------------
 
MANAGER
PRUDENTIAL INVESTMENTS FUND MANAGEMENT LLC (PIFM)
GATEWAY CENTER THREE, 100 MULBERRY STREET
NEWARK, NJ 07102-4077
 
    Under a management agreement with the Fund, PIFM manages the Fund's
investment operations and administers its business affairs. For the fiscal
period ended September 30, 1998, the Fund paid PIFM management fees of .07% of
the Fund's average net assets.
    As of November 30, 1998, PIFM served as the Manager to all 46 of the
Prudential Mutual Funds, and as Manager or administrator to 22 closed-end
investment companies, with aggregate assets of approximately $69 billion.
 
INVESTMENT ADVISER
The Prudential Investment Corporation, called Prudential Investments, is the
Fund's investment adviser. Its address is Prudential Plaza, 751 Broad Street,
Newark, NJ 07102. PIFM has responsibility for all investment advisory services,
supervises Prudential Investments and reimburses Prudential Investments for its
costs and expenses, exclusive of profit or overhead.
 
DISTRIBUTOR
Prudential Investment Management Services LLC (PIMS) distributes the Fund's
shares under a Distribution Agreement with the Fund. PIMS does not receive any
compensation from the Fund for distributing its shares.
 
YEAR 2000 READINESS DISCLOSURE
The services provided to the Fund and the shareholders by the Manager, the
Distributor, the Transfer Agent and the Custodian depend on the smooth
functioning of their computer systems and those of outside service providers.
Many computer software systems in use today cannot distinguish the year 2000
from the year 1900 because of the way dates are encoded and calculated. Such
event could have a negative impact on handling securities trades, payments of
interest and dividends, pricing and account services. The Manager, the
Distributor, the Transfer Agent and the Custodian have advised the Fund that
they have been actively working on necessary changes to their computer systems
to prepare for the year 2000.
 
- --------------------------------------------------------------------------------
                                                                               9
<PAGE>
HOW THE FUND IS MANAGED
- ------------------------------------------------
 
The Fund and its Board receive and have received since early 1998 satisfactory
quarterly reports from the principal service providers as to their preparations
for year 2000 readiness, although there can be no assurance that the service
providers (or other securities market participants) will successfully complete
the necessary changes in a timely manner or that there will be no adverse impact
on the Fund. Moreover, the Fund at this time has not considered retaining
alternative service providers or directly undertaken efforts to achieve year
2000 readiness, the latter of which would involve substantial expenses without
an assurance of success.
    Additionally, issuers of securities generally as well as those purchased by
the Fund may confront year 2000 compliance issues which, if material and not
resolved, could have an adverse impact on securities markets and/ or a specific
issuer's performance and result in a decline in the value of the securities held
by the Fund.
 
- -------------------------------------------------------------------
10  LIQUID ASSETS FUND                                     [LOGO] (800) 225-1852
<PAGE>
FUND DISTRIBUTIONS
AND TAX ISSUES
- -------------------------------------
 
Investors who buy shares of the Fund should be aware of some important tax
issues. For example, the Fund distributes DIVIDENDS and CAPITAL GAINS, if any,
to shareholders. These distributions are subject to taxes, unless you hold your
shares in a 401(k) plan, an Individual Retirement Account (IRA), or some other
qualified tax-deferred plan or account.
    The following briefly discusses some of the important federal tax issues you
should be aware of, but is not meant to be tax advice. For tax advice, please
speak with your tax adviser.
 
DISTRIBUTIONS
The Fund distributes DIVIDENDS of any net investment income to shareholders
every month. The dividends you receive from the Fund will be taxed as ordinary
income, whether or not they are reinvested in the Fund.
    Although the Fund is not likely to realize capital gains because of the
types of securities we purchase, any realized net CAPITAL GAINS will be paid to
shareholders--typically once a year. Capital gains are generated when the Fund
sells its assets for a profit.
    For your convenience, Fund distributions of dividends and capital gains are
AUTOMATICALLY REINVESTED in the Fund. If you ask us to pay the distributions in
cash, we will send you a check. Either way, the distributions are subject to
taxes, again unless your shares are held in a qualified tax-deferred plan or
account. For more information about automatic reinvestment and other shareholder
services, see "Step 3: Additional Shareholder Services" in the next section.
 
TAX ISSUES
FORM 1099
Every year, you will receive a Form 1099, which reports the amount of dividends
and capital gains we distributed to you during the prior year. If you own shares
of the Fund as part of a qualified tax-deferred plan or account, your taxes are
deferred, so you will not receive a Form 1099. However, you will receive a Form
1099 when you take any distributions from your qualified tax-deferred plan or
account.
    Fund distributions are generally taxable in the year they are received,
except when we declare certain dividends in December of a calendar year and
actually pay them in January of the following year. In such cases, the dividends
are treated as if they were paid on December 31 of the prior year.
 
- --------------------------------------------------------------------------------
                                                                              11
<PAGE>
FUND DISTRIBUTIONS
AND TAX ISSUES
- ------------------------------------------------
 
WITHHOLDING TAXES
If federal tax law requires you to provide the Fund with your tax identification
number and certifications as to your tax status, and you fail to do this, we
will withhold and pay to the U.S. Treasury 31% of your distributions and sale
proceeds. If you are subject to backup withholding, we will withhold and pay to
the U.S. Treasury 31% of your distributions. Dividends of net investment income
and short-term capital gains paid to a nonresident foreign shareholder generally
will be subject to a U.S. withholding tax of 30%. This rate may be lower,
depending on any tax treaty the U.S. may have with the shareholder's country.
 
- -------------------------------------------------------------------
12  LIQUID ASSETS FUND                                     [LOGO] (800) 225-1852
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- -------------------------------------
 
HOW TO BUY SHARES
STEP 1: OPEN AN ACCOUNT
Shares of the Fund are available to investment advisory clients of Prudential
Securities Incorporated that participate in any of the following managed account
programs:
 
     --    Prudential Investments Individually Managed Accounts
 
     --    Prudential Securities Portfolio Management (PSPM)
 
     --    Quantum Portfolio Management (Quantum)
 
     --    Managed Assets Consulting Services (MACS)
 
     --    Managed Assets Consulting Services - Custom Services (MACS-CS)
 
     --    Prudential Securities Investment Supervisory Group
 
    To participate in any of these programs, you must be an Eligible Benefit
Plan. Eligible Benefit Plans are:
 
     --    employee benefit plans as defined in Section 3(3) of the Employee
           Retirement Income Security Act of 1974 (ERISA) other than government
           plans as defined in Section 3(32) of ERISA and church plans as
           defined in Section 3(33) of ERISA;
 
     --    pension, profit-sharing or other employee benefit plans qualified
           under Section 401 of the Internal Revenue Code of 1986, as amended
           (the Internal Revenue Code);
 
     --    deferred compensation and annuity plans under Section 457 or
           403(b)(7) of the Internal Revenue Code; and
 
     --    Individual Retirement Accounts (IRAs) as defined in Section 408(a) of
           the Internal Revenue Code.
 
    Eligibility to participate in any of these programs is within the discretion
of Prudential Securities. You should contact a Prudential Securities Financial
Advisor for more information. We have the right to reject any purchase order or
suspend or modify the sale of Fund shares.
 
AUTOMATIC PURCHASE (AUTOSWEEP). Shares of the Fund can only be purchased through
automatic investment procedures (the Autosweep program). The Autosweep program
allows you to designate a money market fund as your primary money sweep fund. If
you do not designate a
 
- --------------------------------------------------------------------------------
                                                                              13
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- ------------------------------------------------
 
primary money sweep fund, the Fund will automatically be your primary money
sweep fund. You have the option to change your primary money sweep fund at any
time by notifying your Prudential Securities Financial Advisor.
    When your Prudential Securities account has a credit balance (that is,
immediately available funds), Prudential Securities will purchase shares of the
Fund equal to that amount. This will occur on the business day following the
existence of a credit balance. Prudential Securities may use and retain the
benefit of credit balances in your account until Fund shares are purchased (that
is, until the next business day).
    Credit balances of $1 or more in your account will automatically be invested
in shares of the Fund. Where your credit balance results from a sale of
securities, the available cash will be invested in the Fund on settlement date.
Where your credit balance results from any other transaction (that is, receipt
of a dividend or interest payment, maturity of a bond or your own cash payment
to your securities account), the available cash will be invested in the Fund on
the first business day after it is received by Prudential Securities. All
available cash in your account, regardless of its source, will automatically be
invested.
    You will begin earning dividends on your shares purchased through Autosweep
on the day the order is placed. Prudential Securities will purchase shares of
the Fund at 4:30 p.m. New York Time on the business day the order is placed and
payment for the shares will be made by 4:30 p.m. New York Time on the next
business day.
    Your investment in the Fund will be held in the name of Prudential
Securities. Prudential Securities will receive all statements and dividends from
the Fund and will, in turn, send you account statements showing your purchases,
sales and dividends.
 
STEP 2: UNDERSTANDING THE PRICE YOU'LL PAY
When you invest in a mutual fund, you buy shares of the Fund. Shares of a money
market fund, like the Fund, are priced differently than shares of common stock
and other securities.
    The share value of a mutual fund--known as the NET ASSET VALUE or NAV--is
determined by a simple calculation: it's the total value of the Fund (assets
minus liabilities) divided by the total number of shares outstanding. In
determining NAV, the Fund values its securities using the amortized cost
 
- -------------------------------------------------------------------
14  LIQUID ASSETS FUND                                     [LOGO] (800) 225-1852
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- ------------------------------------------------
method. The Fund seeks to maintain a NAV of $1.
    We determine the NAV of our shares once each business day at 4:30 p.m. New
York Time on days that the New York Stock Exchange is open for trading. We do
not determine NAV on days when we have not received any orders to purchase or
sell Fund shares, or when changes in the value of the Fund's portfolio do not
materially affect the NAV.
 
STEP 3: ADDITIONAL SHAREHOLDER SERVICES
As a Fund shareholder, you can take advantage of the following services and
privileges:
 
AUTOMATIC REINVESTMENT. As we explained in the Fund Distributions and Tax Issues
section, the Fund pays out--or distributes--its net investment income and
capital gains to all shareholders. For your convenience, we will automatically
reinvest your distributions in the Fund at NAV. If you want your distributions
paid in cash, you can indicate this preference on your application, or notify
your Prudential Securities Financial Advisor at least five business days before
the date we determine who receives dividends.
 
REPORTS TO SHAREHOLDERS. Every year we will send you an annual report (along
with an updated prospectus) and a semi-annual report, which contain important
financial information about the Fund. To reduce Fund expenses, we will send one
annual shareholder report, one semi-annual shareholder report and one annual
prospectus per household, unless you instruct us otherwise.
 
HOW TO SELL YOUR SHARES
You can sell your shares of the Fund for cash (in the form of a check) at any
time, subject to certain restrictions.
    When you sell shares of the Fund--also known as redeeming your shares--the
price you will receive will be the NAV next determined after we receive your
order to sell. Prudential Securities must receive your order to sell by 4:30
p.m. New York Time to process the sale on that day.
    Generally, we will pay you for the shares that you sell within seven days
after we receive your sell order.
 
- --------------------------------------------------------------------------------
                                                                              15
<PAGE>
HOW TO BUY AND
SELL SHARES OF THE FUND
- ------------------------------------------------
 
RESTRICTIONS ON SALES
There are certain times when you may not be able to sell shares of the Fund, or
when we may delay paying you the proceeds from a sale. This may happen during
unusual market conditions or emergencies when the Fund can't determine the value
of its assets or sell its holdings. For more information, see the SAI, "Purchase
and Redemption of Fund Shares--Sale of Shares."
 
REDEMPTION IN KIND
If the sales of Fund shares you make during any 90-day period reach the lesser
of $250,000 or 1% of the value of the Fund's net assets, we can then give you
securities from the Fund's portfolio instead of cash. If you want to sell the
securities for cash, you would have to pay the costs charged by a broker.
 
AUTOMATIC REDEMPTION FOR AUTOSWEEP
Your Fund shares will be automatically redeemed to cover any deficit in your
Prudential Securities account. The amount redeemed will be the nearest dollar
amount necessary to cover the deficit.
    The amount of the redemption will be the lesser of the total value of Fund
shares held in your Prudential Securities account or the deficit in your
Prudential Securities account. If you want to pay for a securities transaction
in your account other than through this procedure, you must deposit sufficient
cash in your securities account BEFORE THE SETTLEMENT DATE. If you want to pay
any other deficit in your securities account other than through this procedure,
you must deposit sufficient cash in your securities account BEFORE YOU INCUR THE
DEFICIT.
    Redemptions are automatically made by Prudential Securities, to the nearest
dollar, on each day to satisfy deficits from securities transactions or to honor
your redemption requests. Your account will be automatically scanned for
deficits each day and, if there is insufficient cash in your account, we will
redeem an appropriate number of shares of the Fund at the next determined NAV to
satisfy any remaining deficit. You are entitled to any dividend declared on the
redeemed shares through the day before the redemption is made. Dividends
declared on the redemption date will be retained by Prudential Securities, which
has advanced monies to satisfy deficits in your account.
 
- -------------------------------------------------------------------
16  LIQUID ASSETS FUND                                     [LOGO] (800) 225-1852
<PAGE>
FINANCIAL HIGHLIGHTS
- -------------------------------------
 
The financial highlights will help you evaluate the Fund's financial
performance. The TOTAL RETURN in the chart represents the rate that a
shareholder earned on an investment in the Fund, assuming reinvestment of all
dividends and other distributions. The information is for shares of the Fund for
the periods indicated.
    Review this chart with the financial statements and report of independent
accountants which appear in the annual report and the SAI and are available upon
request. Additional performance information is contained in the annual report,
which you can receive at no charge.
    The financial highlights for the period ended September 30, 1998 were
audited by PricewaterhouseCoopers LLP, independent accountants. Their report was
unqualified.
 
LIQUID ASSETS FUND (FISCAL PERIOD ENDED 9-30-98)
 
<TABLE>
<CAPTION>
- -----------------------------------------------
PER SHARE OPERATING PERFORMANCE         1998
- -----------------------------------------------
<S>                                  <C>
 NET ASSET VALUE, BEGINNING OF
  PERIOD (12-22-97)                       $1.00
 INCOME FROM INVESTMENT OPERATIONS:
 Net investment income and net
  realized gains                            .04
 Dividends and distributions to
  shareholders                             (.04)
 Net asset value, end of year             $1.00
 TOTAL RETURN(1)                          4.52%
- -----------------------------------------------
 RATIOS/SUPPLEMENTAL DATA                  1998
- -----------------------------------------------
 NET ASSETS, END OF PERIOD (000)       $441,944
 RATIOS TO AVERAGE NET ASSETS:
 Net investment income                  5.53%(2)
 Expenses                                .21%(2)
</TABLE>
 
1.   TOTAL RETURN ASSUMES REINVESTMENT OF DIVIDENDS AND DISTRIBUTIONS. IT IS
     CALCULATED ASSUMING SHARES ARE PURCHASED ON THE FIRST DAY AND SOLD ON THE
     LAST DAY OF EACH PERIOD REPORTED. TOTAL RETURN FOR PERIODS OF LESS THAN A
     FULL YEAR ARE NOT ANNUALIZED.
2.   ANNUALIZED
 
- --------------------------------------------------------------------------------
                                                                              17
<PAGE>
THE PRUDENTIAL MUTUAL FUND FAMILY
- -------------------------------------
 
Prudential offers a broad range of mutual funds designed to meet your individual
needs. For information about these funds, contact your financial adviser or call
us at (800) 225-1852. Read the prospectus carefully before you invest or send
money.
 
STOCK FUNDS
PRUDENTIAL DISTRESSED SECURITIES
  FUND, INC.
PRUDENTIAL EMERGING GROWTH FUND, INC.
PRUDENTIAL EQUITY FUND, INC.
PRUDENTIAL EQUITY INCOME FUND
PRUDENTIAL INDEX SERIES FUND
  PRUDENTIAL SMALL-CAP INDEX FUND
  PRUDENTIAL STOCK INDEX FUND
THE PRUDENTIAL INVESTMENT
  PORTFOLIOS, INC.
  PRUDENTIAL JENNISON GROWTH FUND
  PRUDENTIAL JENNISON GROWTH
     & INCOME FUND
PRUDENTIAL MID-CAP VALUE FUND
PRUDENTIAL REAL ESTATE SECURITIES FUND
PRUDENTIAL SMALL-CAP QUANTUM
  FUND, INC.
PRUDENTIAL SMALL COMPANY VALUE
  FUND, INC.
PRUDENTIAL 20/20 FOCUS FUND
PRUDENTIAL UTILITY FUND, INC.
NICHOLAS-APPLEGATE FUND, INC.
  NICHOLAS-APPLEGATE GROWTH
     EQUITY FUND
 
ASSET ALLOCATION/BALANCED FUNDS
PRUDENTIAL BALANCED FUND
PRUDENTIAL DIVERSIFIED FUNDS
  CONSERVATIVE GROWTH FUND
  MODERATE GROWTH FUND
  HIGH GROWTH FUND
THE PRUDENTIAL INVESTMENT PORTFOLIOS, INC.
  PRUDENTIAL ACTIVE BALANCED FUND
 
GLOBAL FUNDS
GLOBAL STOCK FUNDS
PRUDENTIAL DEVELOPING MARKETS FUND
  PRUDENTIAL DEVELOPING MARKETS
     EQUITY FUND
  PRUDENTIAL LATIN AMERICA EQUITY FUND
PRUDENTIAL EUROPE GROWTH FUND, INC.
PRUDENTIAL GLOBAL GENESIS FUND, INC.
PRUDENTIAL INDEX SERIES FUND
  PRUDENTIAL EUROPE INDEX FUND
  PRUDENTIAL PACIFIC INDEX FUND
PRUDENTIAL NATURAL RESOURCES
  FUND, INC.
PRUDENTIAL PACIFIC GROWTH FUND, INC.
PRUDENTIAL WORLD FUND, INC.
  GLOBAL SERIES
  INTERNATIONAL STOCK SERIES
GLOBAL UTILITY FUND, INC.
 
GLOBAL BOND FUNDS
PRUDENTIAL GLOBAL LIMITED MATURITY FUND, INC.
  LIMITED MATURITY PORTFOLIO
PRUDENTIAL INTERMEDIATE GLOBAL INCOME FUND, INC.
PRUDENTIAL INTERNATIONAL BOND
  FUND, INC.
THE GLOBAL TOTAL RETURN FUND, INC.
 
- -------------------------------------------------------------------
18  LIQUID ASSETS FUND                                     [LOGO] (800) 225-1852
<PAGE>
- -------------------------------------
 
BOND FUNDS
TAXABLE BOND FUNDS
PRUDENTIAL DIVERSIFIED BOND FUND, INC.
PRUDENTIAL GOVERNMENT INCOME
  FUND, INC.
PRUDENTIAL GOVERNMENT SECURITIES TRUST
  SHORT-INTERMEDIATE TERM SERIES
PRUDENTIAL HIGH YIELD FUND, INC.
PRUDENTIAL HIGH YIELD TOTAL RETURN FUND, INC.
PRUDENTIAL INDEX SERIES FUND
  PRUDENTIAL BOND MARKET INDEX FUND
PRUDENTIAL STRUCTURED MATURITY
  FUND, INC.
  INCOME PORTFOLIO
 
TAX-EXEMPT BOND FUNDS
PRUDENTIAL CALIFORNIA MUNICIPAL FUND
  CALIFORNIA SERIES
  CALIFORNIA INCOME SERIES
PRUDENTIAL MUNICIPAL BOND FUND
  HIGH INCOME SERIES
  INSURED SERIES
PRUDENTIAL MUNICIPAL SERIES FUND
  FLORIDA SERIES
  MASSACHUSETTS SERIES
  NEW JERSEY SERIES
  NEW YORK SERIES
  NORTH CAROLINA SERIES
  OHIO SERIES
  PENNSYLVANIA SERIES
PRUDENTIAL NATIONAL MUNICIPALS
  FUND, INC.
 
MONEY MARKET FUNDS
TAXABLE MONEY MARKET FUNDS
CASH ACCUMULATION TRUST
  LIQUID ASSETS FUND
  NATIONAL MONEY MARKET FUND
PRUDENTIAL GOVERNMENT SECURITIES TRUST
  MONEY MARKET SERIES
  U.S. TREASURY MONEY MARKET SERIES
PRUDENTIAL SPECIAL MONEY MARKET
  FUND, INC.
  MONEY MARKET SERIES
PRUDENTIAL MONEYMART ASSETS, INC.
 
TAX-FREE MONEY MARKET FUNDS
PRUDENTIAL TAX-FREE MONEY FUND, INC.
PRUDENTIAL CALIFORNIA MUNICIPAL FUND
  CALIFORNIA MONEY MARKET SERIES
PRUDENTIAL MUNICIPAL SERIES FUND
  CONNECTICUT MONEY MARKET SERIES
  MASSACHUSETTS MONEY MARKET SERIES
  NEW JERSEY MONEY MARKET SERIES
  NEW YORK MONEY MARKET SERIES
 
COMMAND FUNDS
COMMAND MONEY FUND
COMMAND GOVERNMENT FUND
COMMAND TAX-FREE FUND
 
INSTITUTIONAL MONEY MARKET FUNDS
PRUDENTIAL INSTITUTIONAL LIQUIDITY PORTFOLIO, INC.
  INSTITUTIONAL MONEY MARKET SERIES
 
- --------------------------------------------------------------------------------
                                                                              19
<PAGE>
                 [This page has been left blank intentionally.]
 
- -------------------------------------------------------------------
20  LIQUID ASSETS FUND                                     [LOGO] (800) 225-1852
<PAGE>
                 [This page has been left blank intentionally.]
 
- --------------------------------------------------------------------------------
                                                                              21
<PAGE>
FOR MORE INFORMATION
- --------------------------------------------------------------------------------
 
Please read this prospectus before you invest in the Fund and keep it for future
reference. For information or shareholder questions contact:
 
PRUDENTIAL MUTUAL FUND SERVICES LLC
P.O. BOX 15005
NEW BRUNSWICK, NJ 08906-5005
(800) 225-1852
(732) 417-7555
  (if calling from outside the U.S.)
 
- --------------------------------
Outside Brokers Should Contact:
PRUDENTIAL INVESTMENT MANAGEMENT SERVICES LLC
P.O. BOX 15035
NEW BRUNSWICK, NJ 08906-5035
(800) 778-8769
 
- ------------------------------------
Visit Prudential's Web Site At:
http://www.prudential.com
 
- --------------------------------
Additional information about the Fund can be obtained without charge and can be
found in the following documents:
 
STATEMENT OF ADDITIONAL INFORMATION (SAI)
 (incorporated by reference into this prospectus)
 
ANNUAL REPORT
 
SEMI-ANNUAL REPORT
 
You can also obtain copies of Fund documents from the Securities and Exchange
Commission as follows:
 
By Mail:
Securities and Exchange Commission
Public Reference Section
Washington, DC 20549-6009
  (The SEC charges a fee to copy documents.)
 
In Person:
Public Reference Room in
Washington, DC
  (For hours of operation, call 1(800) SEC-0330)
 
Via the Internet:
http://www.sec.gov
 
- --------------------------------
CUSIP Number:
147541502
 
Investment Company Act File No:
811-4060
 
MF175A                                   [LOGO] Printed on Recycled Paper
<PAGE>
                            CASH ACCUMULATION TRUST
                      STATEMENT OF ADDITIONAL INFORMATION
                             DATED JANUARY 20, 1999
 
    Cash Accumulation Trust (the Trust), an open-end, diversified, management
investment company is offered in two series: National Money Market Fund (NMMF)
and Liquid Assets Fund (LAF) (each a Fund and collectively, the Funds). Each
series operates as a separate fund with identical investment objectives and
similar policies designed to meet its investment goals. The investment objective
of each of NMMF and LAF is current income to the extent consistent with
preservation of capital and liquidity. There can be no assurance that either
Fund's investment objective will be achieved. See "How the Fund Invests" in the
applicable Prospectus and "Description of the Funds, their Investments and
Risks."
 
    The Trust's address is Gateway Center Three, 100 Mulberry Street, Newark,
New Jersey 07102-4077 and its telephone number is (800) 225-1852.
 
    This Statement of Additional Information sets forth information about each
of the Funds. This Statement of Additional Information is not a prospectus and
should be read in conjunction with the NMMF Prospectus or the LAF Prospectus,
each dated January 20, 1999, copies of which may be obtained from the Trust upon
request.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                               PAGE
                                                              ------
<S>                                                           <C>
Trust History...............................................  B-2
Description of the Funds, their Investments and Risks.......  B-2
Investment Restrictions.....................................  B-5
Management of the Trust.....................................  B-9
Control Persons and Principal Holders of Securities.........  B-12
Investment Advisory and Other Services......................  B-13
Brokerage Allocation and Other Practices....................  B-16
Securities and Organization.................................  B-17
Purchase and Redemption of Fund Shares......................  B-18
Net Asset Value.............................................  B-18
Taxes, Dividends and Distributions..........................  B-19
Calculation of Yield........................................  B-21
Financial Statements........................................  B-22
Reports of Independent Accountants..........................    --
Appendix I-Description of Security Ratings..................  I-1
Appendix II-Information Relating to Prudential..............  II-1
</TABLE>
 
- --------------------------------------------------------------------------------
 
MF175B
<PAGE>
                                 TRUST HISTORY
 
    The Trust was organized under the laws of Massachusetts on April 27, 1984 as
an unincorporated business trust, a form of organization that is commonly
referred to as a Massachusetts business trust.
 
             DESCRIPTION OF THE FUNDS, THEIR INVESTMENTS AND RISKS
 
    (a)CLASSIFICATION. The Trust is a diversified open-end management investment
       company.
 
    (b)INVESTMENT STRATEGIES AND RISKS.
 
    Each Fund's investment objective is current income to the extent consistent
with preservation of capital and liquidity. While the principal investment
policies and strategies for seeking to achieve this objective are described in
each Fund's Prospectus, a Fund may from time to time also utilize the
securities, instruments, policies and strategies described below in seeking to
achieve its objective. A Fund may not be successful in achieving its objective
and you can lose money.
 
OBLIGATIONS ISSUED OR GUARANTEED BY THE U.S. GOVERNMENT, ITS AGENCIES AND
INSTRUMENTALITIES
 
    Obligations issued or guaranteed as to principal and interest by the U.S.
Government may be acquired by a Fund in the form of custodial receipts that
evidence ownership of future interest payments, principal payments or both on
certain United States Treasury notes or bonds. Such notes and bonds are held in
custody by a bank on behalf of the owners. These custodial receipts are known by
various names, including "Treasury Receipts," "Treasury Investment Growth
Receipts" (TIGRs) and "Certificates of Accrual on Treasury Securities" (CATS).
Neither Fund intends to purchase TIGRs or CATS during the coming year.
 
FLOATING RATE AND VARIABLE RATE SECURITIES
 
    Each Fund may purchase "floating rate" and "variable rate" securities.
Investments in floating or variable rate securities normally will involve
securities which provide that the rate is set as a spread to a designated base
rate, such as rates on Treasury bills, and, in some cases, that the purchaser
can demand payment of the obligation at specified intervals or after a specified
notice period (in each case a period of less than thirteen months) at par plus
accrued interest, which amount may be more or less than the amount paid for
them. Variable rate securities provide for a specified periodic adjustment in
the interest rate, while floating rate securities have an interest rate which
changes whenever there is a change in the designated base interest rate.
 
DEMAND FEATURES AND GUARANTEES
 
    LAF may purchase demand features and guarantees. A demand feature supporting
a money market fund instrument can be relied upon in a number of respects.
First, the demand feature can be relied upon to SHORTEN THE MATURITY of the
underlying instrument. Second, the demand feature, if unconditional, can be used
to EVALUATE THE CREDIT QUALITY of the underlying security. This means that the
credit quality of the underlying security can be based solely on the credit
quality of the unconditional demand feature supporting that security.
 
    A GUARANTEE is a form of unconditional credit support that may include bond
insurance, a letter of credit, and an unconditional demand feature. A money
market fund holding a security subject to a guarantee may determine the credit
quality of the underlying security solely on the basis of the credit quality of
the supporting guarantee.
 
    LAF can only invest 10% of its total assets in securities directly issued
by, or supported by, a demand feature provider or guarantor. Investment Company
Act Rule 2a-7 provides a more stringent limit on demand features and guarantees
that are "second tier securities" under the Rule; that is, those securities that
are rated in the second highest category by a specified number of rating
organizations. Specifically, Rule 2a-7 provides that a money market fund cannot
invest more than 5% of its total assets in securities directly issued or
supported by second tier demand features or guarantees that are issued by the
same entity.
 
LENDING OF SECURITIES
 
    Consistent with applicable regulatory requirements, NMMF may lend its
portfolio securities to broker-dealers and LAF may lend its portfolio to
brokers, dealers and financial institutions, provided that outstanding loans for
each Fund do not exceed in the aggregate 33 1/3% of the value of its respective
total assets and, provided that such loans are callable at any time by either
Fund and are at all times secured by cash or U.S. Government securities that is
equal to at least the market value, determined daily, of the loaned securities.
The advantage of such loans is that the Fund continues to receive payments in
lieu of the interest on the
 
                                      B-2
<PAGE>
loaned securities, while at the same time earning interest either directly from
the borrower or on the cash collateral which will be invested in short-term
obligations. Any voting rights, or rights to consent, relating to the securities
loaned pass to the borrower. However, if a material event affecting the
investment occurs, such loans will be called so securities may be voted by the
Fund (or Funds).
 
    A loan may be terminated by the borrower on one business day's notice or by
a Fund at any time. If the borrower fails to maintain the requisite amount of
collateral, the loan automatically terminates, and the Fund could use the
collateral to replace the securities while holding the borrower liable for any
excess of replacement cost over collateral. As with any extensions of credit,
there are risks of delay in recovery and in some cases loss of rights in the
collateral should the borrower of the securities fail financially. However,
these loans of portfolio securities will only be made to firms determined to be
creditworthy pursuant to procedures approved by the Board of Trustees of the
Trust. On termination of the loan, the borrower is required to return the
securities to the Fund, and any gain or loss in the market price during the loan
would inure to that Fund.
 
    Each Fund will pay reasonable finders', administrative and custodial fees in
connection with a loan of its securities or may share the interest earned on
collateral with the borrower.
 
ILLIQUID SECURITIES
 
    Each Fund may not hold more than 10% of its respective net assets in
illiquid securities, including securities that are illiquid by virtue of the
absence of a readily available market or legal or contractual restrictions on
resale and repurchase agreements which have a maturity of longer than seven
days. Historically, illiquid securities have included securities subject to
contractual or legal restrictions on resale because they have not been
registered under the Securities Act of 1933, as amended (Securities Act),
securities which are otherwise not readily marketable and repurchase agreements
having a maturity of longer than seven days. Securities which have not been
registered under the Securities Act are referred to as private placements or
restricted securities and are purchased directly from the issuer or in the
secondary market. Mutual funds do not typically hold a significant amount of
these restricted or other illiquid securities because of the potential for
delays on resale and uncertainty in valuation. Limitations on resale may have an
adverse effect on the marketability of portfolio securities and a mutual fund
might be unable to dispose of restricted or other illiquid securities promptly
or at reasonable prices and might thereby experience difficulty satisfying
redemptions within seven days. A mutual fund might also have to register such
restricted securities in order to dispose of them, resulting in additional
expense and delay. Adverse market conditions could impede such a public offering
of securities.
 
    In recent years, however, a large institutional market has developed for
certain securities that are not registered under the Securities Act, including
repurchase agreements, commercial paper, foreign securities, municipal
securities and corporate bonds and notes. Institutional investors depend on an
efficient institutional market in which the unregistered security can be readily
resold or on an issuer's ability to honor a demand for repayment. The fact that
there are contractual or legal restrictions on resale to the general public or
to certain institutions may not be indicative of the liquidity of such
securities.
 
    Rule 144A of the Securities Act allows for a broader institutional trading
market for securities otherwise subject to restriction on resale to the general
public. Rule 144A establishes a "safe harbor" from the registration requirements
of the Securities Act for resales of certain securities to qualified
institutional buyers. The investment adviser anticipates that the market for
certain restricted securities such as institutional commercial paper and foreign
securities will expand further as a result of this regulation and the
development of automated systems for the trading, clearance and settlement of
unregistered securities of domestic and foreign issuers, such as the PORTAL
System sponsored by the National Association of Securities Dealers, Inc.
 
    Restricted securities eligible for resale pursuant to Rule 144A under the
Securities Act and commercial paper for which there is a readily available
market will not be deemed to be illiquid under procedures established by the
Board of Trustees. The investment adviser will monitor the liquidity of such
restricted securities subject to the supervision of the Board of Trustees. In
reaching liquidity decisions, the investment adviser will consider, inter alia,
the following factors: (1) the frequency of trades and quotes for the security;
(2) the number of dealers wishing to purchase or sell the security and the
number of other potential purchasers; (3) dealer undertakings to make a market
in the security; and (4) the nature of the security and the nature of the
marketplace trades (E.G., the time needed to dispose of the security, the method
of soliciting offers and the mechanics of the transfer). In addition, in order
for commercial paper that is issued in reliance on Section 4(2) of the
Securities Act to be considered liquid, (i) it must be rated in one of the two
highest rating categories by at least two nationally recognized statistical
rating organizations (NRSRO), or if only one NRSRO rates the securities, by that
NRSRO, or, if unrated, be of comparable quality in the view of the investment
adviser; and (ii) it must not be "traded flat" (i.e., without accrued interest)
or in default as to principal or interest. Repurchase agreements subject to
demand are deemed to have a maturity equal to the notice period.
 
                                      B-3
<PAGE>
    Each Fund's investment in Rule 144A securities could have the effect of
increasing the Fund's illiquidity to the extent that qualified institutional
buyers become uninterested for a time in purchasing these securities.
 
SECURITIES OF OTHER INVESTMENT COMPANIES
 
    Each Fund may invest up to 10% of its total assets in securities of other
money market funds registered under the Investment Company Act. Generally, each
Fund does not intend to invest more than 5% of its total assets in such
securities. To the extent that a Fund invests in securities of other registered
investment companies, shareholders of the Fund may be subject to duplicate
management and advisory fees.
 
BORROWING
 
    NMMF may borrow from banks (including through entering into reverse
repurchase agreements) up to and including 10% of the value of its total assets
taken at cost for temporary or emergency purposes. NMMF may pledge up to and
including 10% of its net assets to secure such borrowings. LAF may borrow
(including through entering reverse repurchase agreements) up to 33 1/3% of the
value of its total assets (computed at the time the loan is made) from banks for
temporary, extraordinary or emergency purposes. LAF may pledge up to 33 1/3% of
its total assets to secure such borrowings. A Fund will not purchase portfolio
securities if its borrowings (other than permissible securities loans) exceed 5%
of its total assets.
 
REPURCHASE AGREEMENTS
 
    Each Fund may purchase securities and concurrently enter into "repurchase
agreements" with the seller, whereby the seller agrees to repurchase such
securities at a specified price within a specified time (generally seven days or
less). The repurchase agreements provide that the Fund will sell the underlying
instruments back to the dealer or the bank at the specified price and at a fixed
time in the future, usually not more than seven days from the date of purchase.
The difference between the purchase price and the resale price represents the
interest earned by the Fund, which is unrelated to the coupon rate or maturity
of the purchased security. Repurchase agreements will at all times be fully
collateralized in an amount at least equal to the resale price. Such collateral
will be held by the Trust's Custodian, either directly or through a
sub-custodian, either physically or in a book-entry account.
 
    A Fund will enter into repurchase transactions only with parties which meet
creditworthiness standards approved by the Trust's Board of Trustees. The Fund's
investment adviser monitors the creditworthiness of such parties under the
general supervision of the Board of Trustees. In the event of a default or
bankruptcy by a seller, the Fund will promptly seek to liquidate the collateral.
To the extent that the proceeds limit any sale of such collateral upon a default
in the obligation to repurchase are less than the resale price, the Fund will
suffer a loss, if the financial institution that is a party to the repurchase
agreement petitions for bankruptcy or becomes subject to the U.S. Bankruptcy
Code, the law regarding the rights of the trust is unsettled. As a result, under
these circumstances, there may be a restriction on the Fund's ability to sell
the collateral, and the Fund could suffer a loss.
 
    LAF participates in a joint repurchase account with other investment
companies managed by Prudential Investments Fund Management LLC (PIFM or the
Manager) pursuant to an order of the Securities and Exchange Commission. On a
daily basis, any uninvested cash balances of LAF may be aggregated with those of
such other investment companies and invested in one or more repurchase
agreements. LAF participates in the income earned or accrued in the joint
account based on the percentage of its investment. In connection with
transactions in repurchase agreements with U.S. financial institutions, it is
the Trust's policy that its custodian or designated subcustodians, as the case
may be, under triparty repurchase agreements, take possession of the underlying
collateral securities, the value of which equals or exceeds the resale price of
the agreement. If the seller defaults and the value of the collateral declines
or if bankruptcy proceedings are commenced with respect to the seller of the
security, realization of the collateral by the Trust may be delayed or limited.
 
    NMMF does not currently participate in the joint repurchase account.
 
REVERSE REPURCHASE AGREEMENTS
 
    Reverse repurchase agreements have the characteristics of borrowing and
involve the sale of securities held by a Fund with an agreement to repurchase
the securities at a specified price, date and interest payment. Each Fund
intends only to use the reverse repurchase technique when it will be to its
advantage to do so. These transactions are only advantageous if the Fund has an
opportunity to earn a greater rate of interest on the cash derived from the
transaction than the interest cost of obtaining that
 
                                      B-4
<PAGE>
cash. A Fund may be unable to realize earnings from the use of the proceeds
equal to or greater than the interest required to be paid. The use of reverse
repurchase agreements may exaggerate any increase or decrease in the value of
the Fund's portfolio. The Trust's Custodian will maintain in a segregated
account cash, or other liquid assets, maturing not later than the expiration of
the reverse repurchase agreements and having a value equal to or greater than
such commitments.
 
FIRM COMMITMENT AGREEMENTS
 
    NMMF may enter into firm commitment agreements with banks or broker-dealers
for the purchase of securities at an agreed-upon price on a specified future
date. Such agreements might be entered into, for example, when NMMF anticipates
a decline in the yield of securities of a given issuer and is able to obtain a
more advantageous yield by committing currently to purchase securities to be
issued later. Entry into firm commitment agreements with broker-dealers requires
the creation and maintenance of a segregated account. The underlying securities
subject to a firm commitment agreement are subject to fluctuation in market
value and, therefore, to the extent that NMMF remains fully invested at the same
time that it has entered into firm commitment agreements, there will be a
greater possibility that the net asset value of NMMF shares will vary from
$1.00.
 
    Pending delivery of securities purchased under firm commitment agreements,
the amount of the purchase price will be held in liquid assets such as cash or
high-quality debt obligations. Such obligations will be maintained in a separate
account with NMMF's custodian in an amount equal on a daily basis to the amount
of NMMF's firm commitments. When the time comes to pay for securities subject to
firm commitment agreements, NMMF will meet its obligations from then-available
cash flow or the sale of securities.
 
WHEN-ISSUED AND DELAYED DELIVERY SECURITIES
 
    LAF may purchase securities on a "when-issued" or delayed delivery basis.
When-issued or delayed delivery transactions arise when securities are purchased
or sold by LAF with payment and delivery taking place in the future in order to
secure what is considered to be an advantageous price and yield to the Fund at
the time of entering into the transaction. LAF will limit such purchases to
those which the date of delivery and payment falls within 90 days of the date of
the commitment. LAF will make commitments for such when issued transactions only
with the intention of actually acquiring the securities. The Trust's Custodian
will segregate cash or other liquid assets having a value equal to or greater
than LAF's purchase commitments. If LAF chooses to dispose of the right to
acquire a when-issued security prior to its acquisition, it could, as with the
disposition of any other portfolio security, incur a gain or loss due to market
fluctuations. The securities so purchased are subject to market fluctuation and
no interest accrues to the purchaser during the period between purchase and
settlement.
 
                            INVESTMENT RESTRICTIONS
 
    The following restrictions are fundamental policies. Fundamental policies
are those which cannot be changed without the approval of the holders of a
majority of the outstanding voting securities of a Fund. A "majority of the
outstanding voting securities," when used in this Statement of Additional
Information, means the lesser of (i) 67% of the voting shares represented at a
meeting at which more than 50% of the outstanding voting shares are present in
person or represented by proxy or (ii) more than 50% of the outstanding voting
shares. With respect to the submission of a change in fundamental policy or
investment objective to a particular Fund, such matters shall be deemed to have
been effectively acted upon with respect to such Fund if a majority of the
outstanding voting securities of the particular Fund votes for the approval of
such matters as provided above, notwithstanding (1) that such matter has not
been approved by a majority of the outstanding voting securities of the other
Fund affected by such matter and (2) that such matter has not been approved by a
majority of the outstanding voting securities of the Trust.
 
NATIONAL MONEY MARKET FUND
 
    The following investment restrictions are fundamental policies of NMMF and
may not be changed except as described above.
 
    NMMF may not:
 
        1. Purchase any security if, as a result, more than 5% of its total
           assets (based on current value) would then be invested in the
    securities of a single issuer, except that the Fund may invest up to 15% of
    its total net assets (based on current value) in the obligations of any one
    bank. This limitation does not apply to U.S. Government Securities.
 
                                      B-5
<PAGE>
        2. Purchase voting securities or make investments for the purpose of
           exercising control or management.
 
        3. Invest more than 25% of its total assets in any one industry. This
           restriction does not apply to U.S. Government Securities or to bank
    obligations. For purposes of this restriction, telephone, gas and electric
    public utilities are each regarded as separate industries and finance
    companies whose financing activities are related primarily to the activities
    of their parent companies are classified in the industry of their parents.
 
        4. Participate on a joint or joint and several basis in any trading
           account in securities. (The "bunching" of orders for the purchase or
    sale of portfolio securities with other accounts managed by the Manager or
    the Sub-advisor to reduce acquisition costs, to average prices among them,
    or to facilitate such transactions, is not considered participating in a
    trading account in securities.)
 
        5. Make short sales of securities, maintain a short position or purchase
           securities on margin, except that the Fund may obtain short-term
    credits as necessary for the clearance of security transactions.
 
        6. Borrow money except for temporary or emergency purposes and then only
           in an amount not exceeding 10% of its total assets taken at cost;
    provided, however, that the Fund may loan its securities as described in the
    Prospectus and this Statement of Additional Information under the caption
    "Description of the Funds, their Investments and Risks-- Lending of
    Securities". However, the Fund will not borrow if the value of the Fund's
    assets would be less than 300% of its borrowing obligations. In addition,
    when borrowings (other than permissible securities loans) exceed 5% of its
    total assets, the Fund will not purchase additional portfolio securities.
    Permissible borrowings will be entered into solely for the purpose of
    facilitating the orderly sale of portfolio securities to accommodate
    redemption requests.
 
        7. Make loans, except that the Fund may purchase or hold debt
           instruments in accordance with its investment objective and policies.
    This restriction does not apply to repurchase agreements or loans of
    portfolio securities.
 
        8. Pledge, mortgage or hypothecate more than 10% of its net assets taken
           at cost at the time of the incurrence of such borrowings.
 
        9. Act as an underwriter of securities of other issuers except that, in
           the disposition of portfolio securities, it may be deemed to be an
    underwriter under the federal securities laws.
 
       10. Invest in securities of other investment companies, except by
           purchases in the open market involving only customary brokers'
    commissions, or in connection with a merger, consolidation, reorganization
    or similar transactions. For the purposes of this restriction, foreign banks
    or their agents or subsidiaries are not considered investment companies.
    (Under the Investment Company Act of 1940 (the "Investment Company Act") no
    registered investment company may (a) invest more than 10% of its total
    assets (taken at current value) in securities of other investment companies,
    (b) own securities of any one investment company having a value in excess of
    5% of its total assets (taken at current value), or (c) own more than 3% of
    the outstanding voting stock of any one investment company.)
 
       11. Purchase or retain securities of an issuer if, to the knowledge of
           the Trust, any officers, trustees and directors of the Trust or any
    investment adviser of the Trust, who individually own beneficially more than
    1/2 of 1% of the shares or securities of that issuer, own in the aggregate
    more than 5% of such shares or securities.
 
       12. Purchase securities of any company which has (with predecessor
           businesses and entities) a record of less than three years'
    continuous operation or purchase securities whose source of repayment if
    based, directly or indirectly, on the credit of such a company if as a
    result more than 5% of the total assets of the Fund (taken at current value)
    would be invested in such securities; provided, however, that the Fund may
    purchase U.S. Government Securities without regard to this limitation.
 
       13. Buy or sell oil, gas or other mineral leases, rights or royalty
           contracts, commodities or commodity contracts or real estate. This
    restriction does not prevent the Fund from purchasing securities of
    companies investing in real estate or of companies which are not principally
    engaged in the business of buying or selling such leases, rights or
    contracts nor does it prevent the Fund from purchasing securities secured by
    real estate or interests therein.
 
       14. Purchase any illiquid security, including any securities whose
           disposition is restricted under federal securities laws and
    securities that are not readily marketable, if, as a result, more than 10%
    of the Fund's total assets (based on
 
                                      B-6
<PAGE>
    current value) would then be invested in such securities. The staff of the
    Securities and Exchange Commission is presently of the view that repurchase
    agreements maturing in more than seven days are subject to this restriction.
    Until that position is revised, modified or rescinded, the Fund will conduct
    its operations in a manner consistent with this view.
 
       15. Write or purchase puts, calls, warrants, straddles, spreads or
           combinations thereof except that, as described above under "Firm
    Commitment Agreements," the Fund may enter into firm commitment agreements
    with respect to securities otherwise eligible for purchase by the Fund.
 
    Restriction 1 applies to securities subject to repurchase agreements but not
to the repurchase agreements themselves provided that the obligation of the
seller to repurchase the securities from the Fund is "collateralized fully" as
defined in Rule 2a-7 under the Investment Company Act. Although Restriction 1
permits the Fund to invest up to 15% of its total assets in the obligations of
any one bank, federal regulations applicable to the Fund currently prohibit the
Fund (with limited exceptions) from making any investment that would result in
more than 5% of the Fund's assets being invested in obligations of a single
issuer.
 
    Although Restriction 3 states that it does not apply to bank obligations,
federal regulations applicable to the Fund currently limit bank obligations to
include all banks which are organized under the laws of the United States or a
state (as defined in the Investment Company Act), U.S. branches of foreign banks
that are subject to the same regulations as U.S. banks and foreign branches of
domestic banks. In addition, in accordance with Restriction 3, it is our policy
not to concentrate 25% or more of total assets in a single industry.
 
    Although Restriction 14 states that the Fund may invest no more than 10% of
its total assets in illiquid securities, the Fund intends to invest no more than
10% of its net assets in such securities, in compliance with current
interpretations of the staff of the Securities and Exchange Commission.
 
    The limitation on investment in illiquid securities set forth in Restriction
14 does not apply to certain restricted securities, including securities issued
pursuant to Rule 144A under the Securities Act of 1933 and certain commercial
paper, that the Manager or Sub-adviser has determined to be liquid under
procedures approved by the Board of Trustees.
 
    For purposes of the foregoing restrictions, U.S. Government Securities refer
to obligations of the U.S. Treasury and obligations issued by agencies of the
U.S. Government or instrumentalities established or sponsored by the U.S.
Government.
 
LIQUID ASSETS FUND
 
    The following investment restrictions are fundamental policies of LAF and
may not be changed except as described above.
 
    LAF may not:
 
        1. Purchase securities on margin (but the Fund may obtain such
           short-term credits as may be necessary for the clearance of
    transactions); provided that the deposit or payment by the Fund of initial
    or maintenance margin in connection with options or futures contracts is not
    considered the purchase of a security on margin.
 
        2. Make short sales of securities or maintain a short position.
 
        3. Issue senior securities, borrow money (including through the entry
           into reverse repurchase agreement transactions) or pledge its assets,
    except that the Fund may borrow up to 33 1/3% of the value of its total
    assets (calculated when the loan is made) from banks for temporary,
    extraordinary or emergency purposes or for the clearance of transactions and
    may pledge up to 33 1/3% of the value of the Fund's total assets to secure
    such borrowings. The Fund will not purchase portfolio securities if its
    borrowings exceed 5% of the Fund's net assets. The purchase or sale of
    securities on a "when-issued" or delayed delivery basis, the entry into
    reverse repurchase agreements, the purchase and sale of financial futures
    contracts and collateral arrangements with respect thereto and with respect
    to the writing of options and obligations of the Trust to Trustees pursuant
    to deferred compensation arrangements are not deemed to be a pledge of
    assets and such arrangements are not deemed to be the issuance of a senior
    security.
 
        4. Purchase any security (other than obligations of the U.S. Government,
           its agencies or instrumentalities) if as a result, with respect to
    75% of the value of the Fund's total assets, more than 5% of the value of
    the Fund's total assets would be invested in the securities of a single
    issuer.
 
        5. Purchase any securities (other than obligations of the U.S.
           Government, its agencies and instrumentalities) if, as a result, 25%
    or more of the value of the Fund's total assets (determined at the time of
    investment) would be invested in the
 
                                      B-7
<PAGE>
    securities of one or more issuers conducting their principal business
    activities in the same industry, provided that there is no limitation with
    respect to money market instruments of domestic banks. For purposes of this
    exception, domestic banks shall include all banks which are organized under
    the laws of the United States or a state (as defined in the Investment
    Company Act), U.S. branches of foreign banks that are subject to the same
    regulations as U.S. banks and foreign branches of domestic banks.
 
        6. Buy or sell real estate or interests in real estate, except that the
           Fund may purchase and sell securities which are secured by real
    estate, securities of companies which invest or deal in real estate and
    publicly traded securities of real estate investment trusts.
 
        7. Act as underwriter except to the extent that, in connection with the
           disposition of portfolio securities, it may be deemed to be an
    underwriter under certain federal securities laws.
 
        8. Make investments for the purpose of exercising control or management.
 
        9. Invest in securities of other non-affiliated investment companies,
           except by purchases in the open market involving only customary
    brokerage commissions and as a result of which the Fund will not hold more
    than 3% of the outstanding voting securities of any one investment company,
    will not have invested more than 5% of its total assets in any one
    investment company and will not have invested more than 10% of its total
    assets (determined at the time of investment) in such securities of one or
    more investment companies, or except as part of a merger, consolidation or
    other acquisition.
 
       10. Make loans, except through (i) repurchase agreements and (ii) loans
           of portfolio securities (limited to 33 1/3% of the value of the
    Fund's total assets).
 
       11. Buy or sell commodities or commodity contracts, except that the Fund
           may purchase and sell futures contracts and options thereon.
 
       12. Purchase more than 10% of the outstanding voting securities of any
           one issuer.
 
    Although Restriction 4 limits the Fund's investments in the securities of a
single issuer to 5% of the value of 75% of the value of the Fund's total assets,
federal regulations applicable to the Fund currently prohibit the Fund from
making any investment that would result in more than 5% of the Fund's total
assets being invested in securities of a single issuer.
 
    Whenever any fundamental investment policy or investment restriction states
a maximum percentage of a Fund's assets, it is intended that if the percentage
limitation is met at the time the investment is made, a later change in
percentage resulting from changing total or net asset values will not be
considered a violation of such policy. However, in the event that the Fund's
asset coverage for borrowings falls below 300%, the Fund will take prompt action
to reduce its borrowing, as required by applicable law.
 
                                      B-8
<PAGE>
                             MANAGEMENT OF THE FUND
 
(a) TRUSTEES
 
    The Trust has Trustees who, in addition to overseeing the actions of each
Fund's Manager, Subadviser, and Distributor, decide upon matters of general
policy.
 
    The Trustees also review the actions of the officers of the Trust, who
conduct and supervise the daily business operations of the Trust.
 
(b) MANAGEMENT INFORMATION--TRUSTEES AND OFFICERS
 
<TABLE>
<CAPTION>
                                                                                      PRINCIPAL OCCUPATIONS
                                        POSITION WITH                              AND OTHER AFFILIATIONS FOR
NAME, ADDRESS AND AGE (1)                 THE TRUST                                    THE LAST FIVE YEARS
- ------------------------------  ------------------------------  -----------------------------------------------------------------
<S>                             <C>                             <C>
Edward D. Beach (73)                       Trustee              President and Director of BMC Fund, Inc., a closed-end investment
                                                                 company; previously Vice Chairman of Broyhill Furniture
                                                                 Industries, Inc., Certified Public Accountant; Secretary and
                                                                 Treasurer of Broyhill Family Foundation, Inc.; Member of the
                                                                 Board of Trustees of Mars Hill College; and Director of The High
                                                                 Yield Income Fund, Inc.
Delayne Dedrick Gold (59)                  Trustee              Marketing and Management Consultant; Director of The High Yield
                                                                 Income Fund, Inc.
*Robert F. Gunia (51)                      Trustee              Vice President of Prudential Investments (since September 1997);
                                                                 Executive Vice President and Treasurer (since December 1996) of
                                                                 Prudential Investments Fund Management LLC (PIFM); Senior Vice
                                                                 President (since March 1987) of Prudential Securities
                                                                 Incorporated (Prudential Securities); formerly Chief
                                                                 Administrative Officer (July 1990-September 1996), Director
                                                                 (January 1989-September 1996) and Executive Vice President,
                                                                 Treasurer and Chief Financial Officer (June 1987-September 1996)
                                                                 of Prudential Mutual Fund Management, Inc. (PMF); Vice President
                                                                 and Director (since May 1989) of The Asia Pacific Fund, Inc.;
                                                                 Director of The High Yield Income Fund, Inc.
Don G. Hoff (62)                           Trustee              Chairman and Chief Executive Officer (since 1980) of Intertec,
                                                                 Inc. (investments); Chairman and Chief Executive Officer of The
                                                                 Lamaur Corporation, Inc.; Director of Innovative Capital
                                                                 Management, Inc. and The Greater China Fund, Inc.; and Chairman
                                                                 and Director of The Asia Pacific Fund, Inc.
Robert E. LaBlanc (63)                     Trustee              President (since 1981) of Robert E. LaBlanc Associates, Inc.
                                                                 (telecommunications); formerly General Partner at Salomon
                                                                 Brothers; and Vice-Chairman of Continental Telecom; Director of
                                                                 Storage Technology Corporation, Titan Corporation, Salient 3
                                                                 Communications, Inc. and Tribune Company; and Trustee of
                                                                 Manhattan College.
</TABLE>
 
                                      B-9
<PAGE>
<TABLE>
<CAPTION>
                                                                                      PRINCIPAL OCCUPATIONS
                                        POSITION WITH                              AND OTHER AFFILIATIONS FOR
NAME, ADDRESS AND AGE (1)                 THE TRUST                                    THE LAST FIVE YEARS
- ------------------------------  ------------------------------  -----------------------------------------------------------------
<S>                             <C>                             <C>
*Mendel A. Melzer, CFA (37)                Trustee              Chief Investment Officer (since October 1996) of Prudential
751 Broad Street                                                 Mutual Funds; formerly Chief Financial Officer (November 1995-
Newark, NJ 07102                                                 September 1996) of Prudential Investments; Senior Vice President
                                                                 and Chief Financial Officer of Prudential Preferred Financial
                                                                 Services (April 1993-November 1995); Managing Director of
                                                                 Prudential Investment Advisors (April 1991-April 1993) and
                                                                 Senior Vice President of Prudential Capital Corporation (July
                                                                 1989-April 1991); Chairman and Director of Prudential Series
                                                                 Fund, Inc.; and Director of The High Yield Income Fund, Inc.
Robin B. Smith (58)                        Trustee              Chairman and Chief Executive Officer (since August 1996) of
                                                                 Publishers Clearing House; formerly President and Chief
                                                                 Executive Officer (January 1988-August 1996) and President and
                                                                 Chief Operating Officer (September 1981-December 1988) of
                                                                 Publishers Clearing House; Director of BellSouth Corporation,
                                                                 Texaco Inc., Springs Industries Inc., and Kmart Corporation.
Stephen Stoneburn (54)                     Trustee              President and Chief Executive Officer (since June 1996) of
                                                                 Quadrant Media Corp. (a publishing company); formerly President
                                                                 (June 1995-June 1996) of Argus Integrated Media, Inc.; Senior
                                                                 Vice President and Managing Director (January 1993-1995) of
                                                                 Cowles Business Media; Senior Vice President (January 1991-1992)
                                                                 and Publishing Vice President (May 1989-December 1990) of Gralla
                                                                 Publications (a division of United Newspapers, U.K.); and Senior
                                                                 Vice President of Fairchild Publications, Inc.
Nancy H. Teeters (67)                      Trustee              Economist; Director of Inland Steel Industries; formerly, Vice
                                                                 President and Chief Economist of International Business
                                                                 Machines; Member of the Board of Governors of the Federal
                                                                 Reserve System; Governor of the Horace H. Rackham School of
                                                                 Graduate Studies of the University of Michigan; Assistant
                                                                 Director of the Committee on the Budget of the US House of
                                                                 Representatives; Senior Fellow at the Library of Congress;
                                                                 Senior Fellow at the Brookings Institution; staff at Office of
                                                                 Management and Budget, Council of Economic Advisors and the
                                                                 Federal Reserve Board.
Brian M. Storms (44)                      President             President (October 1998-Present) of Prudential Investments;
                                                                 President (September 1996-October 1998) of Prudential Mutual
                                                                 Funds, Annuities, and Investment Management Services; Managing
                                                                 Director (July 1991-September 1996) of Fidelity Investments
                                                                 Institutional Services Company, Inc.; President (October
                                                                 1989-September 1991) of J.K. Schofield; Senior Vice President
                                                                 (September 1982-October 1989) of INVEST Financial Corporation.
Robert C. Rosselot (38)                   Secretary             Assistant General Counsel (since September 1997) of PIFM;
                                                                 formerly, partner with the firm of Howard & Howard, Bloomfield
                                                                 Hills, Michigan (December 1995-September 1997) and Corporate
                                                                 Counsel (September 1990-December 1995) of Federated Investors.
</TABLE>
 
                                      B-10
<PAGE>
<TABLE>
<CAPTION>
                                                                                      PRINCIPAL OCCUPATIONS
                                        POSITION WITH                              AND OTHER AFFILIATIONS FOR
NAME, ADDRESS AND AGE (1)                 THE TRUST                                    THE LAST FIVE YEARS
- ------------------------------  ------------------------------  -----------------------------------------------------------------
<S>                             <C>                             <C>
Grace C. Torres (39)               Treasurer and Principal      First Vice President (since December 1996) of PIFM; First Vice
                                   Financial and Accounting      President (since March 1994) of Prudential Securities; formerly
                                            Officer              First Vice President (March 1994-September 1996), Prudential
                                                                 Mutual Fund Management, Inc. and Vice President (July 1989-March
                                                                 1994) of Bankers Trust Corporation.
Stephen M. Ungerman (44)             Assistant Treasurer        Vice President and Tax Director (since March 1996) of Prudential
                                                                 Investments; formerly First Vice President of Prudential Mutual
                                                                 Fund Management, Inc. (February 1993-September 1996).
</TABLE>
 
- ------------
 
(1) Unless otherwise noted, the address for each of the above persons is c/o
    Prudential Investments Fund Management LLC, Gateway Center Three, 100
    Mulberry Street, Newark, New Jersey 07102-4077.
 
 *  "Interested" Trustee of the Fund, as defined in the Investment Company Act
    of 1940 (the Investment Company Act).
 
    Trustees and officers of the Trust are also trustees, directors and officers
of some or all of the other investment companies distributed by Prudential
Securities or Prudential Investment Management Services LLC.
 
    The Trustees have adopted a retirement policy which calls for the retirement
of Trustees on December 31 of the year in which they reach the age of 72, except
that retirement is being phased in for Trustees who were age 68 or older as of
December 31, 1993. Under this phase-in provision, Messrs. Beach and Eyre are
scheduled to retire on December 31, 1999 and December 31, 1998, respectively.
 
    Pursuant to the terms of the Management Agreements with the Trust, the
Manager pays all compensation of officers of the Trust as well as the fees and
expenses of all Trustees of the Trust who are affiliated persons of the Manager.
 
    The Trust pays each of its Trustees who is not an affiliated person of PIFM
or Prudential Investments (PI) annual compensation of $3,000, in addition to
certain out-of-pocket expenses. The amount of annual compensation paid to each
Trustee may change as a result of the introduction of additional funds on the
board of which the Trustee will be asked to serve.
 
    Trustees may receive their Trustee's fees pursuant to a deferred fee
agreement with the Trust. Under the terms of the agreement, the Trust accrues
daily the amount of such Trustee's fees in installments which accrue interest at
a rate equivalent to the prevailing rate applicable to 90-day U.S. Treasury
Bills at the beginning of each calendar quarter or, at the daily rate of return
of the Trust (the Fund Rate). Payment of the interest so accrued is also
deferred and accruals become payable at the option of the Trustee. A Fund's
obligation to make payments of deferred Trustees' fees, together with interest
thereon, is a general obligation of the Fund.
 
    The following table sets forth the aggregate compensation paid by the Fund
to the Trustees who are not affiliated with the Manager for the fiscal year
ended September 30, 1998 and the aggregate compensation paid to such Trustees
for service on the Trust's Board and that of all other funds managed by PIFM
(Fund Complex) for the calendar year ended December 31, 1998. In October 1997,
PIFM recommended to the Board of Trustees, and the Board approved, certain
changes in the Trust's management and operations, subject to shareholder
approval, whereby substantially similar services would be furnished, but with
lower expenses. Accordingly, on December 11, 1997, the shareholders elected a
new Board of Trustees, approved a management agreement between the Trust and
PIFM and approved a subadvisory agreement between PIFM and The Prudential
Investment Corporation. These new agreements became effective at the close of
business on December 12, 1997.
 
                                      B-11
<PAGE>
                               COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                        PENSION OR                       APPROXIMATE
                                                                        RETIREMENT                      COMPENSATION
                                                                         BENEFITS                        FROM TRUST
                                                                         ACCRUED        ESTIMATED      AND PRUDENTIAL
                                                         AGGREGATE      AS PART OF        ANNUAL            FUND
                                                       COMPENSATION       TRUST       BENEFITS UPON     COMPLEX PAID
                  NAME AND POSITION                     FROM TRUST       EXPENSES       RETIREMENT     TO TRUSTEES(2)
- -----------------------------------------------------  -------------  --------------  --------------  -----------------
<S>                                                    <C>            <C>             <C>             <C>
Edward D. Beach--Trustee                                 $   2,250         None            N/A           $   135,000( 38/63)*
E. Philip Cannon--Former Trustee                         $   1,150         None            N/A               **
Donald P. Carter--Former Trustee                         $   1,375         None            N/A               **
Gary A. Childress--Former Trustee                        $   1,150         None            N/A               **
William D. Cvengros--Former Trustee                      $       0         None            N/A               **
Stephen C. Eyre--Former Trustee                          $   2,250         None            N/A           $    45,000( 12/13)*
Delayne D. Gold--Trustee                                 $   2,250         None            N/A           $   135,000( 38/63)*
Robert F. Gunia(1)--Trustee                                 --             None            N/A               --
Don G. Hoff--Trustee                                     $   2,250         None            N/A           $    45,000( 12/13)*
Robert E. LaBlanc--Trustee                               $   2,250         None            N/A           $    45,000( 12/13)*
Gary L. Light--Former Trustee                            $   1,150         None            N/A               **
Mendel A. Melzer(1)--Trustee                                --             None            N/A               --
Richard L. Nelson--Former Trustee                        $   1,200         None            N/A               **
Lyman W. Porter--Former Trustee                          $   1,150         None            N/A               **
Robert A. Prindiville--Former Trustee                    $       0         None            N/A               **
Alan Richards--Former Trustee                            $   1,275         None            N/A               **
Joel Segall--Former Trustee                              $   1,150         None            N/A               **
Robin B. Smith--Trustee                                  $   2,250         None            N/A           $    90,000( 29/34)*
Stephen Stoneburn--Trustee                               $   2,250         None            N/A           $    45,000( 12/13)*
W. Bryant Stooks--Former Trustee                         $   1,150         None            N/A               **
Nancy H. Teeters--Trustee                                $   2,250         None            N/A           $    90,000( 23/42)*
Gerald M. Thorne--Former Trustee                         $   1,150         None            N/A               **
Stephen J. Treadway--Former Trustee                      $       0         None            N/A               **
</TABLE>
 
- ------------
 *  Indicates number of funds/portfolios in Prudential Fund Complex (including
    the Trust) to which aggregate compensation relates.
 
**  Former Trustees receive no compensation from any fund in the Prudential Fund
    Complex, other than the Trust as shown in the first column.
 
(1) Robert F. Gunia and Mendel A. Melzer, who are interested Trustees, do not
    receive compensation from the Trust or any fund in the Fund Complex.
 
(2) Total compensation from all the funds in the Prudential Fund Complex for the
    calendar year ended December 31, 1997, including amounts deferred at the
    election of Trustees under the funds' deferred compensation plans. Including
    accrued interest, total deferred compensation amounted to $139,081 for
    Trustee Robin B. Smith. Currently, Ms. Smith has agreed to defer some of her
    fees at the T-Bill rate and other fees at the Fund Rate.
 
              CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
 
    As of December 31, 1998, the Trustees and officers of the Trust, as a group,
owned less than 1% of the outstanding shares of beneficial interest of each of
the Funds and of the Trust as a whole.
 
                                      B-12
<PAGE>
                     INVESTMENT ADVISORY AND OTHER SERVICES
 
(a) INVESTMENT ADVISERS
 
    The manager of the Trust is Prudential Investments Fund Management LLC,
(PIFM or the Manager), Gateway Center Three, 100 Mulberry Street, Newark, New
Jersey 07102-4077 (PIFM or the Manager). PIFM serves as manager to all of the
other investment companies that, together with the Trust, comprise the
Prudential Mutual Funds. See "How the Fund is Managed" in each Prospectus. As of
November 30, 1998, PIFM managed and/or administered open-end and closed-end
management investment companies with assets of approximately $69 billion.
According to the Investment Company Institute, as of October 31, 1998, the
Prudential Mutual Funds were the 18th largest family of mutual funds in the
United States.
 
    PIFM is a subsidiary of Prudential Securities Incorporated. Prudential
Mutual Fund Services LLC (PMFS or the Transfer Agent), a wholly-owned subsidiary
of PIFM, serves as the transfer agent for the Prudential Mutual Funds and, in
addition, provides customer service, recordkeeping and management and
administration services to qualified plans.
 
    Pursuant to the Management Agreement for NMMF (the NMMF Management
Agreement) and the Management Agreement for LAF (the LAF Management Agreement
and, together with the NMMF Management Agreement, the Management Agreements),
both of which became effective on December 12, 1997, PIFM, subject to the
supervision of the Trust's Board of Trustees and in conformity with the stated
policies of the Funds, manages both the investment operations of each Fund and
the composition of each Fund's portfolio, including the purchase, retention,
disposition and loan of securities. In connection therewith, PIFM is obligated
to keep certain books and records of the Trust. PIFM also administers the
Trust's business affairs and, in connection therewith, furnishes the Trust with
office facilities, together with those ordinary clerical and bookkeeping
services which are not being furnished by State Street Bank and Trust Company,
the Trust's custodian, and PMFS, the Trust's transfer and shareholder servicing
agent. The management services of PIFM for the Trust are not exclusive under the
terms of the Management Agreements and PIFM is free to, and does, render
management services to others.
 
    For its services, PIFM receives, pursuant to the NMMF Management Agreement,
a fee at an annual rate of the average daily net assets of the Fund of .390% of
the first $1 billion of net assets; .375% of the next $500 million of net
assets; .350% of the next $500 million of net assets; and .325% of net assets in
excess of $2 billion. The fee is computed daily and payable monthly. PIFM has
agreed, to the extent NMMF's total expenses exceed .62 of 1% of the average
daily net assets of NMMF for the fiscal year ending September 30, 1998, to
reimburse NMMF for certain expenses up to an aggregate amount of $100,000 to the
extent necessary to reduce such total operating expenses to .62 of 1%. For the
expenses PIFM assumes pursuant to the LAF Management Agreement, PIFM will be
reimbursed for its direct costs, exclusive of any profit or overhead, not to
exceed .39% of the LAF's average daily net assets. It is expected that this
amount will be approximately .07 of 1% of the average daily net assets of LAF
for the fiscal year ending September 30, 1999.
 
    In connection with its management of the business affairs of the Trust
pursuant to the Management Agreements, PIFM bears the following expenses:
 
       (a) the salaries and expenses of all personnel of the Trust and the
           Manager, except the fees and expenses of Trustees who are not
    affiliated persons of PIFM or the Trust's investment adviser;
 
       (b) all expenses incurred by PIFM or by the Trust in connection with
           managing the ordinary course of the Trust's business, other than
    those assumed by the Trust, as described below; and
 
       (c) the costs and expenses payable to The Prudential Investment
           Corporation, doing business as Prudential Investments (PI or the
    Subadviser), pursuant to subadvisory agreements on behalf of the Funds
    between PIFM and PI (the Subadvisory Agreements).
 
    Under the terms of the Management Agreements, the Trust is responsible for
the payment of the following expenses, including (a) the fees or reimbursements
payable to the Manager, (b) the fees and expenses of Trustees who are not
affiliated with the Manager or the Trust's investment adviser, (c) the fees and
certain expenses of the Trust's Custodian and Transfer and Dividend Disbursing
Agent, including the cost of providing records to the Manager in connection with
its obligation of maintaining required records of the Trust and of pricing the
Trust's shares, (d) the charges and expenses of the Trust's legal counsel and
independent accountants, (e) brokerage commissions, if any, and any issue or
transfer taxes chargeable to the Trust in connection with its securities
transactions, (f) all taxes and trust fees payable by the Trust to governmental
agencies, (g) the fees of any trade association of which the Trust is a member,
(h) the cost of share certificates, if any, representing, and/or non-
 
                                      B-13
<PAGE>
negotiable share deposit receipts evidencing, shares of the Trust, (i) the cost
of fidelity and liability insurance, (j) the fees and expenses involved in
registering and maintaining registration of the Trust and of its shares with the
Commission, including the preparation and printing of the Trust's registration
statements and prospectuses for such purposes, and paying the fees and expenses
of notice filings made in accordance with state securities laws, (k) allocable
communications expenses with respect to investor services and all expenses of
shareholders' and Trustees' meetings and of preparing, printing and mailing
reports, proxy statements and prospectuses to shareholders, (l) litigation and
indemnification expenses and other extraordinary expenses not incurred in the
ordinary course of the Trust's business and (m) any expenses assumed by the Fund
pursuant to a distribution plan adopted under Rule 12b-1 of the Investment
Company Act.
 
    Each Management Agreement also provides that PIFM will not be liable for any
error of judgment or any loss suffered by the Trust in connection with the
matters to which the Management Agreements relate except a loss resulting from
willful misfeasance, bad faith, gross negligence or reckless disregard of duty.
Each Management Agreement provides that it will terminate automatically if
assigned (as defined in the Investment Company Act), and that it may be
terminated without penalty by either party upon not more than 60 days' nor less
than 30 days' written notice. The Management Agreements provide that each said
agreement will continue in effect for a period of more than two years from its
execution only so long as such continuance is specifically approved at least
annually in accordance with the requirements of the Investment Company Act.
 
    For the fiscal year ended September 30, 1998, PIFM received management fees
from NMMF and LAF of $1,477,776 and $190,000, respectively. During the fiscal
year, PIMCO Advisors L.P. (PALP), the former manager, received management fees
from NMMF of $620,411.
 
    For the fiscal year ended September 30, 1997 and the prior fiscal years,
PALP served as manager for NMMF. PALP did not serve as manager of LAF. Pursuant
to a management contract between PALP and NMMF, which contract was terminated by
a vote of the former Trustees on October 22, 1997, effective at the close of
business on December 12, 1997, the Fund paid PALP a monthly fee as follows:
 .425% of the first $500 million of the average net assets of NMMF, .400% of the
next $500 million, .375% of the next $500 million, .350% of the next $500
million and .325% of amounts in excess of $2 billion. For the fiscal years ended
September 30, 1996 and 1997, NMMF paid PALP $2,560,734 and $2,886,449,
respectively, for its services under its management contract.
 
    PIFM has entered into Subadvisory Agreements with PIC, doing business as PI
(the Subadviser), a wholly-owned subsidiary of Prudential, on behalf of each of
NMMF and LAF. The Subadvisory Agreements provide that PI furnish investment
advisory services in connection with the investment management of the Funds. In
connection therewith, PI is obligated to keep certain books and records of the
Funds. PIFM continues to have responsibility for all investment advisory
services pursuant to the Management Agreements and supervises PI's performance
of such services. In connection with NMMF, PI is reimbursed by PIFM for the
reasonable costs and expenses incurred by PI in furnishing services to PIFM. In
connection with LAF, PI is reimbursed by PIFM for its direct costs, excluding
profit and overhead, incurred by PI in furnishing services to PIFM.
 
    The Subadviser maintains a corporate credit unit which provides credit
analysis and research on taxable fixed-income securities including money market
instruments. The portfolio manager consults routinely with the credit unit in
managing the Funds' portfolios. The credit unit, with a staff including 7 credit
analysts, reviews on an ongoing basis commercial paper issuers, commercial
banks, non-bank financial institutions and issuers of other taxable fixed-income
obligations. Credit analysts have broad access to research and financial
reports, data retrieval services and industry analysts. They maintain
relationships with the management of corporate issuers and from time to time
visit companies in whose securities the Funds may invest.
 
    The Subadvisory Agreements provide that each will terminate in the event of
its assignment (as defined in the Investment Company Act) or upon the
termination of the Management Agreements. The Subadvisory Agreements may be
terminated by the Trust, PIFM or PI upon not more than 60 days' nor less than 30
days' written notice. The Subadvisory Agreements provide that they will continue
in effect for a period of more than two years from their execution only so long
as such continuance is specifically approved at least annually in accordance
with the requirements of the Investment Company Act.
 
    The Management Agreement between the Trust and PIFM and the Subadvisory
Agreements between PIFM and PIC were last approved by the Board of Trustees,
including a majority of the Trustees who are not parties to the contracts or
interested persons of any such parties, as defined in the Investment Company
Act, on May 13, 1998. Shareholders of NMMF and LAF last approved the Management
Agreement and the Subadvisory Agreements on December 12, 1997.
 
                                      B-14
<PAGE>
(b) PRINCIPAL UNDERWRITER, DISTRIBUTOR AND RULE 12b-1 PLAN
 
    Prudential Investment Management Services LLC (PIMS or the Distributor),
Gateway Center Three, 100 Mulberry Street, Newark, New Jersey 07102-4077, acts
as the distributor of the shares of the Trust. Prior to July 1, 1998, Prudential
Securities Incorporated (Prudential Securities, also referred to as the
Distributor), One Seaport Plaza, New York, New York 10292, served as the
distributor of the Trust's shares.
 
    Pursuant to the Distribution Agreement, the Trust has agreed to indemnify
the Distributor to the extent permitted by applicable law against certain
liabilities under the federal securities laws.
 
DISTRIBUTION PLAN
 
    Under the NMMF Distribution Plan (the Plan) and the Trust's Distribution
Agreement dated December 12, 1997, NMMF pays the Distributor a distribution fee
of up to 0.10% of the average daily net assets of the shares of NMMF, computed
daily and payable monthly which is designed to reimburse the Distributor, in
whole or in part, for its services. The Distributor incurs the expenses of
distributing LAF shares, none of which are reimbursed by or paid for by LAF.
 
    For the fiscal year ended September 30, 1998, the Distributor received
payments of $400,863 under the Plan. The Trust's previous distributor, PIMCO
Funds Distribution Company, received payments of $148,938 under the Plan during
the fiscal year. These amounts were primarily expended for payment of account
servicing fees to financial advisers and other persons who sell shares of NMMF.
 
    The Board of Trustees has determined that, in its judgment, there is a
reasonable likelihood that the Plan will benefit NMMF and its shareholders.
 
    Pursuant to the Plan, the Trustees will be provided with, and will review,
at least quarterly, a written report of the distribution expenses incurred on
behalf of the Trust by the Distributor. The report will include an itemization
of the distribution expenses and the purpose of such expenditures.
 
    The Plan may not be amended to increase materially the amount to be spent
for the services described therein with respect to NMMF without approval of the
shareholders of NMMF, and all material amendments of the Plan must also be
approved by the Trustees in the manner described above. The Plan may be
terminated at any time, by vote of a majority of the Trustees who are not
interested persons of the Trust and who have no direct or indirect financial
interest in the operation of the Plan or any agreements related to the Plan (the
Rule 12b-1 Trustees) or by a vote of a majority of the outstanding voting
securities of the shares of the Fund (as defined in the Investment Company Act).
The Trust's Distribution Agreement provides that it will terminate automatically
if assigned and that it may be terminated, without payment of any penalty, by a
majority of the Rule 12b-1 Trustees or by vote of a majority of the outstanding
voting securities of the Trust, or by the Distributor, on 60 days' written
notice to the other party.
 
    NASD MAXIMUM SALES CHARGE RULE. Pursuant to rules of the NASD, the
Distributor is required to limit aggregate initial sales charges, deferred sales
charges and asset-based sales charges to 6.25% of total gross sales of NMMF
shares. Interest charges on unreimbursed distribution expenses equal to the
prime rate plus one percent per annum may be added to the 6.25% limitation.
Sales from the reinvestment of dividends and distributions are not included in
the calculation of the 6.25% limitation. The annual asset-based sales charge on
shares of NMMF may not exceed .75 of 1% per class. The 6.25% limitation applies
to NMMF rather than on a per shareholder basis. If aggregate sales charges were
to exceed 6.25% of the total gross sales of NMMF, all sales charges on shares of
NMMF would be suspended.
 
(c) OTHER SERVICE PROVIDERS
 
    State Street Bank and Trust Company, One Heritage Drive, North Quincy,
Massachusetts 02171, serves as Custodian for the Trust's portfolio securities,
and in that capacity maintains cash and certain financial and accounting books
and records pursuant to an agreement with the Trust.
 
    Prudential Mutual Fund Services LLC (PMFS), Raritan Plaza One, Edison, New
Jersey 08837, serves as the Transfer and Shareholder Servicing Agent of the
Trust. It is a wholly-owned subsidiary of PIFM. PMFS provides customary transfer
agency services to the Trust, including the handling of shareholder
communications, the processing of shareholder transactions, the maintenance of
shareholder account records, payment of dividends and distributions and related
functions. In connection with services rendered to NMMF, PMFS receives an annual
fee ($9.50) per shareholder account, a new account set up fee ($2.00) for
 
                                      B-15
<PAGE>
each manually-established account and a monthly inactive zero balance account
fee ($0.20) per shareholder account plus its out-of-pocket expenses, including
but not limited to postage, stationery, printing, allocable communications and
other costs. In connection with the transfer agency services rendered by PMFS to
LAF, PMFS will be reimbursed for its direct costs, excluding profit and
overhead.
 
    PricewaterhouseCoopers LLP, 1177 Avenue of the Americas, New York, New York
10036, serves as the Trust's independent public accountants and in that capacity
audits each Fund's annual financial statements. The financial information for
NMMF and LAF provided under "Financial Statements" for the fiscal year ended
September 30, 1998 has been audited by PricewaterhouseCoopers LLP, whose report
is also included under "Financial Statements."
 
                    BROKERAGE ALLOCATION AND OTHER PRACTICES
 
    The Manager is responsible for decisions to buy and sell securities for the
Trust, the selection of brokers and dealers to effect the transactions and the
negotiation of brokerage commissions, if any. (For purposes of this section, the
term "Manager" includes the Subadviser.) The Trust does not normally incur any
brokerage commission expense on such transactions. In the market for money
market instruments, securities are generally traded on a "net" basis, with
dealers acting as principal for their own accounts without a stated commission,
although the price of the security usually includes a profit to the dealer. In
underwritten offerings, securities are purchased at a fixed price which includes
an amount of compensation to the underwriter, generally referred to as the
underwriter's concession or discount. On occasion, certain money market
instruments may be purchased directly from an issuer, in which case no
commissions or discounts are paid. Portfolio securities may not be purchased
from any underwriting or selling syndicate of which the Distributor, or an
affiliate (including Prudential Securities), during the existence of the
syndicate, is a principal underwriter (as defined in the Investment Company
Act), except in accordance with rules of the SEC. The Trust will not deal with
the Distributor or its affiliates on a principal basis.
 
    In placing orders for portfolio securities of the Trust, the Manager is
required to give primary consideration to obtaining the most favorable price and
efficient execution. This means that the Manager will seek to execute each
transaction at a price and commission, if any, which provide the most favorable
total cost or proceeds reasonably attainable under the circumstances. While the
Manager generally seeks reasonably competitive spreads or commissions, the Trust
will not necessarily be paying the lowest spread or commission available. Within
the framework of this policy, the Manager may consider research and investment
services provided by brokers or dealers who effect or are parties to portfolio
transactions of the Trust, the Manager or the Manager's other clients. Such
research and investment services are those which brokerage houses customarily
provide to institutional investors and include statistical and economic data and
research reports on particular companies and industries. Such services are used
by the Manager in connection with all of its investment activities, and some of
such services obtained in connection with the execution of transactions for the
Trust may be used in managing other investment accounts. Conversely, brokers
furnishing such services may be selected for the execution of transactions for
such other accounts, whose aggregate assets are far larger than the Trust's, and
the services furnished by such brokers may be used by the Manager in providing
investment management for the Trust. While such services are useful and
important in supplementing its own research and facilities, the Manager believes
that the value of such services is not determinable and does not significantly
reduce expenses. The Trust does not reduce the advisory fee it pays to the
Manager by any amount that may be attributed to the value of such services.
 
    Subject to the above considerations, Prudential Securities, as an affiliate
of the Trust, may act as a securities broker (or futures commission merchant)
for the Trust. In order for Prudential Securities to effect any portfolio
transactions for the Trust, the commissions, fees or other remuneration received
by Prudential Securities must be reasonable and fair compared to the
commissions, fees or other remuneration paid to other brokers in connection with
comparable transactions involving similar securities being purchased or sold
during a comparable period of time. This standard would allow Prudential
Securities to receive no more than the remuneration which would be expected to
be received by an unaffiliated broker in a commensurate arm's-length
transaction. Furthermore, the Board of Trustees of the Trust, including a
majority of the Trustees who are not "interested" persons, has adopted
procedures which are reasonably designed to provide that any commissions, fees
or other remuneration paid to Prudential Securities are consistent with the
foregoing standard. Brokerage transactions with Prudential Securities are also
subject to such fiduciary standards as may be imposed by applicable law.
 
    During the fiscal years ended September 30, 1996, 1997 and 1998, the Trust
paid no brokerage commissions.
 
                                      B-16
<PAGE>
                          SECURITIES AND ORGANIZATION
 
    The Trust is authorized to issue an unlimited number of full and fractional
shares of beneficial interest, which may be divided into an unlimited number of
series of such shares, and which presently consist of NMMF and LAF. Each share
of a series represents an equal proportionate interest in that series with each
other share of that series and is entitled to a proportionate interest in the
dividends and distributions from that series. Upon termination of a series,
whether pursuant to liquidation of the series or otherwise, shareholders of that
series are entitled to share pro rata in the net assets of the series then
available for distribution to such shareholders. Shareholders have no preemptive
rights.
 
    A copy of the Agreement and Declaration of Trust (the Declaration of Trust)
establishing the Trust is on file with the Secretary of State of The
Commonwealth of Massachusetts. The Declaration of Trust provides for the
perpetual existence of the Trust. The Trust or a series, however, may be
terminated at any time by vote of at least two-thirds of the outstanding shares
of an affected series or by the Trustees upon written notice to the
shareholders. Upon termination of the Trust or of a series, after paying or
otherwise providing for all charges, taxes, expenses and liabilities, whether
due or accrued or anticipated, of the Trust or of the series as may be
determined by the Trustees, the series shall, in accordance with such procedures
as the Trustees consider appropriate, reduce the remaining assets to
distributable form in cash or shares or other securities, or any combination
thereof, and distribute the proceeds to the shareholders of the series involved,
ratably according to the number of shares of such series held by the several
shareholders of the series on the date of termination.
 
    The assets received by the Trust for the issue or sale of shares of a series
and all income, earnings, profits, losses and proceeds therefrom, subject only
to the rights of creditors, are allocated to that series, and constitute the
underlying assets of that series. The underlying assets of a series are
segregated and are charged with the expenses, including the organizational
expenses, in respect of that series and with a share of the general expenses of
the Trust. While the expenses of the Trust are allocated to the separate books
of account of the series, if more than one series has shares outstanding,
certain expenses may be legally chargeable against the assets of all series.
 
    Under Massachusetts law, shareholders could, under certain circumstances, be
held liable for the obligations of the Trust. However, the Declaration of Trust
disclaims shareholder liability for acts or obligations of the Trust and
requires that notice of such disclaimer be given in each agreement, obligation
or instrument entered into or executed by the Trust or the Trustees. The
Declaration of Trust provides for indemnification out of the property of a
series for all loss and expense of any shareholder of that series held liable on
account of being or having been a shareholder. Thus, the risk of a shareholder
incurring financial loss on account of shareholder liability is limited to
circumstances in which the series of which he was a shareholder would be unable
to meet its obligations.
 
    The Declaration of Trust further provides that the Trustees will not be
liable for errors of judgment or mistakes of fact or law. However, nothing in
the Declaration of Trust protects a Trustee against any liability to which the
Trustee would otherwise be subject by reason of willful misfeasance, bad faith,
gross negligence, or reckless disregard of the duties involved in the conduct of
his office. The Declaration of Trust provides for indemnification by the Trust
of the Trustees and the officers of the Trust except with respect to any matter
as to which any such person did not act in good faith in the reasonable belief
that his action was in or not opposed to the best interests of the Trust. Such
person may not be indemnified against any liability to the Trust or the Trust
shareholders to which he would otherwise be subject by reason of willful
misfeasance, bad faith, gross negligence or reckless disregard of the duties
involved in the conduct of his office.
 
    The Trust will not normally hold annual shareholders' meetings. At such time
as less than a majority of the Trustees have been elected by the shareholders,
the Trustees then in office will call a shareholders' meeting for the election
of Trustees. In addition, Trustees may be removed from office by a written
consent signed by the holders of two-thirds of the outstanding shares and filed
with the Trust's custodian or by a vote of the holders of two-thirds of the
outstanding shares at a meeting duly called for the purpose, which meeting shall
be held upon written request of the holders of not less than 10% of the
outstanding shares. Upon written request by ten or more shareholders, who have
been such for at least six months and who hold shares constituting 1% of the
outstanding shares, stating that such shareholders wish to communicate with the
other shareholders for the purpose of obtaining the signatures necessary to
demand a meeting to consider removal of a Trustee, the Trust has undertaken to
provide a list of shareholders or to disseminate appropriate materials (at the
expense of the requesting shareholders).
 
    Except as otherwise disclosed in the Prospectuses and in this Statement of
Additional Information, the Trustees shall continue to hold office and may
appoint their successors.
 
                                      B-17
<PAGE>
                     PURCHASE AND REDEMPTION OF FUND SHARES
 
PURCHASE OF SHARES
 
    Shares of the NMMF are offered to investment advisory clients of Prudential
Securities that participate in any of the following managed account programs
sponsored by Prudential Securities: Gibraltar Advisors, Prudential Securities
Portfolio Management (PSPM), Quantum Portfolio Management (Quantum), Managed
Assets Consulting Services (MACS), Managed Assets Consulting Services Custom
Services (MACS-CS) and Prudential Securities Investment Supervisory Group. See
"How to Buy and Sell Shares of the Fund" in the NMMF Prospectus. A Prudential
Securities client who applies to participate in these managed account programs
will be eligible to purchase shares of NMMF during the period between submission
to and acceptance of the application by Prudential Securities. Eligibility of
participants is within the discretion of Prudential Securities. In the event a
client of Prudential Securities leaves a managed account program, the client may
continue to hold shares of NMMF.
 
    Shares of LAF are offered to investment advisory clients of Prudential
Securities Incorporated (Prudential Securities) that (a) participate in any of
the following managed account programs sponsored by Prudential Securities:
Gibraltar Advisors, Prudential Securities Portfolio Management (PSPM), Quantum
Portfolio Management (Quantum), Managed Assets Consulting Services (MACS) and
Prudential Securities Investment Supervisory Group and (b) are "Eligible Benefit
Plans." "Eligible Benefit Plans" include (i) employee benefit plans as defined
in Section 3(3) of the Employee Retirement Income Security Act of 1974 (ERISA)
other than governmental plans as defined in Section 3(32) of ERISA and church
plans as defined in Section 3(33) of ERISA, (ii) pension, profit-sharing or
other employee benefit plans qualified under Section 401 of the Internal Revenue
Code, (iii) deferred compensation and annuity plans under Section 457 or
403(b)(7) of the Internal Revenue Code, and (iv) Individual Retirement Accounts
(IRAs) as defined in Section 408(a) of the Internal Revenue Code. See "How to
Buy and Sell Shares of the Fund" in the LAF Prospectus. A Prudential Securities
client who applies to participate in these managed account programs will be
eligible to purchase shares of LAF during the period between submission to and
acceptance of the application by Prudential Securities. Investment advisory
clients of Prudential Securities which receive Managed Assets Consulting
Services Custom Services are not eligible to purchase shares of LAF. Eligibility
of participants is within the discretion of Prudential Securities. In the event
a client of Prudential Securities leaves a managed account program, the client
may continue to hold shares of LAF.
 
SALE OF SHARES
 
    If the Board of Trustees determines that it would be detrimental to the best
interests of the remaining shareholders of a Fund to make payment wholly or
partly in cash, the Fund may pay the redemption price in whole or in part by a
distribution in kind of securities from the investment portfolio of the Fund, in
lieu of cash, in conformity with applicable rules of the SEC. Securities will be
readily marketable and will be valued in the same manner as in a regular
redemption. If your shares are redeemed in kind, you would incur transaction
costs in converting the assets into cash. The Trust, however, has elected to be
governed by Rule 18f-1 under the Investment Company Act pursuant to which each
Fund is obligated to redeem shares solely in cash up to the lesser of $250,000
or 1% of the net asset value of the Fund during any 90-day period for any one
shareholder.
 
    The Trust may suspend the right of redemption or postpone the date of
payment for a period of up to seven days. Suspensions or postponements may not
exceed seven days except (1) for any period (a) during which the New York Stock
Exchange is closed other than customary weekend and holiday closings or (b)
during which trading on the New York Stock Exchange is restricted; (2) for any
period during which an emergency exists as a result of which (a) disposal by a
Fund of securities owned by it is not reasonably practicable or (b) it is not
reasonably practicable for a Fund fairly to determine the value of its net
assets; or (3) for such other periods as the SEC may by order permit for the
protection of shareholders of a Fund. The SEC by rules and regulations
determines the conditions under which (i) trading shall be deemed to be
restricted and (ii) an emergency is deemed to exist within the meaning of clause
(2) above.
 
                                NET ASSET VALUE
 
    Each Fund's net asset value per share is determined by subtracting its
liabilities from the value of its assets and dividing the remainder by the
number of outstanding shares.
 
    Each Fund uses the amortized cost method of valuation to determine the value
of its portfolio securities. In that regard, the Trust's Board of Trustees has
determined to maintain a dollar-weighted average portfolio maturity of 90 days
or less, to purchase only instruments having remaining maturities of thirteen
months or less, and to invest only in securities determined by the investment
adviser under the supervision of the Board of Trustees to be of minimal credit
risk and to be of "eligible quality" in
 
                                      B-18
<PAGE>
accordance with regulations of the SEC. The remaining maturity of an instrument
held by the Trust that is subject to a put is deemed to be the period remaining
until the principal amount can be recovered through demand or, in the case of a
variable rate instrument, the next interest reset date, if longer. The value
assigned to the put is zero. The Board of Trustees also has established
procedures designed to stabilize, to the extent reasonably possible, a Fund's
price per share as computed for the purpose of sales and redemptions at $1.00.
Such procedures will include review of a Fund's portfolio holdings by the Board,
at such intervals as deemed appropriate, to determine whether a Fund's net asset
value calculated by using available market quotations deviates from $1.00 per
share based on amortized cost. The extent of any deviation will be examined by
the Board, and if such deviation exceeds 1/2 of 1%, the Board will promptly
consider what action, if any, will be initiated. In the event the Board of
Trustees determines that a deviation exists which may result in material
dilution or other unfair results to investors or existing shareholders, the
Board will take such corrective action as it regards necessary and appropriate,
including the sale of portfolio instruments prior to maturity to realize gains
or losses, the shortening of average portfolio maturity, the withholding of
dividends or the establishment of net asset value per share by using available
market quotations.
 
    Each Fund computes its net asset value at 4:30 PM New York time, on each day
the New York Stock Exchange (the Exchange) is open for trading. In the event the
New York Stock Exchange closes early on any business day, the net asset value of
a Fund's shares shall be determined at a time between such closing and 4:30 PM
New York time. The Exchange is closed on the following holidays: New Year's Day,
Martin Luther King Jr. Day, Presidents' Day, Good Friday, Memorial Day,
Independence Day, Labor Day, Thanksgiving Day and Christmas Day.
 
                       TAXES, DIVIDENDS AND DISTRIBUTIONS
 
    NMMF and LAF have elected and qualified, and each Fund intends to remain
qualified, as a regulated investment company under Subchapter M of the Internal
Revenue Code of 1986, as amended. This relieves a fund (but not its
shareholders) from paying federal income tax on income which is distributed to
shareholders, and, if a fund did realize long-term capital gains, permits net
capital gains of the fund (i.e., the excess of net long-term capital gains over
net short-term capital losses) to be treated as long-term capital gains of the
shareholders, regardless of how long shareholders have held their shares in that
fund.
 
    Qualification as a regulated investment company requires, among other
things, that (a) at least 90% of a fund's annual gross income (without reduction
for losses from the sale or other disposition of securities or foreign
currencies) be derived from interest, dividends, payments with respect to
securities loans, and gains from the sale or other disposition of securities or
options thereon, or other income (including, but not limited to, gains from
options) derived with respect to its business of investing in such securities;
(b) a fund must diversify its holdings so that, at the end of each quarter of
the taxable year, (i) at least 50% of the market value of a fund's assets is
represented by cash, U.S. Government obligations and other securities limited in
respect of any one issuer to an amount not greater than 5% of the market value
of the fund's assets and 10% of the outstanding voting securities of such
issuer, and (ii) not more than 25% of the value of its assets is invested in the
securities of any one issuer (other than U.S. Government obligations) and (c)
the fund must distribute to its shareholders at least 90% of its net investment
income and net short-term gains (i.e., the excess of net short-term capital
gains over net long-term capital losses) in each year.
 
    Gains or losses on sales of securities by a Fund will be treated as
long-term capital gains or losses if the securities have been held by it for
more than one year. The Funds do not anticipate realizing long-term capital
gains or losses. Other gains or losses on the sale of securities will be
short-term capital gains or losses. In addition, debt securities acquired by a
Fund may be subject to original issue discount and market discount rules.
 
    Each Fund is required to distribute 98% of its ordinary income in the same
calendar year in which it is earned. Each Fund is also required to distribute
during the calendar year 98% of the capital gain net income it earned during the
twelve months ending on October 31 of such calendar year, as well as all
undistributed ordinary income and undistributed capital gain net income from the
prior year or the twelve-month period ending on October 31 of such prior year,
respectively. To the extent it does not meet these distribution requirements, a
Fund will be subject to a non-deductible 4% excise tax on the undistributed
amount. For purposes of this excise tax, income on which a Fund pays income tax
is treated as distributed. The Fund intends to make timely distributions in
order to avoid this excise tax. For this purpose, dividends declared in October,
November and December payable to shareholders of record on a specified date in
October, November and December and paid in the following January will be treated
as having been received by shareholders on December 31 of the calendar year in
which declared. Under this rule, therefore, a shareholder may be taxed in the
prior year on dividends or distributions actually received in January of the
following year.
 
                                      B-19
<PAGE>
    It is anticipated that the net asset value per share of each Fund will
remain constant. However, if the net asset value per share fluctuates, a
shareholder may realize gain or loss upon the disposition of a share.
Distributions of net investment income and net short-term gains will be taxable
to the shareholder at ordinary income rates regardless of whether the
shareholder receives such distributions in additional shares or cash. Any gain
or loss realized upon a sale or redemption of shares by a shareholder who is not
a dealer in securities will generally be treated as long-term capital gain or
loss if the shares have been held for more than one year and otherwise as
short-term capital gain or loss if the shares have been held for more than one
year and otherwise as short-term capital gain or loss. Any such loss, however,
although otherwise treated as short-term capital loss, will be treated as
long-term capital loss to the extent of any capital gain distributions received
by the shareholder, if the shares have been held for six months or less.
Futhermore, certain rules may apply which would limit the ability of the
shareholder to recognize any loss if, for example, the shareholder replaced the
shares within 30 days of the disposition of the shares. Because none of the
Fund's net income is anticipated to arise from dividends on common or preferred
stock, none of its distributions to shareholders will be eligible for the
dividends received deduction for corporations under the Internal Revenue Code.
 
    Income received by the Fund from sources within foreign countries may be
subject to withholding and other taxes imposed by such countries. Income tax
treaties between certain countries and the United States may reduce or eliminate
such taxes. It is impossible to determine in advance the effective rate of
foreign tax to which the Fund will be subject, since the amount of the Fund's
assets to be invested in various countries is not known.
 
    If the Fund is liable for foreign income taxes, and if more than 50% of the
value of the Fund's assets consists of securities of foreign corporations, the
Fund may elect to "pass through" to the Fund's shareholders the amount of
foreign income taxes paid by the Fund, but there can be no assurance that the
Fund will be able to do so. If the Fund does elect to "pass through" the foreign
taxes paid, shareholders will be required to (i) include in gross income (in
addition to taxable dividends actually received) their PRO RATA share of the
foreign income taxes paid by the Fund; and (ii) treat their PRO RATA share of
foreign income taxes as paid by them. Shareholders will then be permitted either
to deduct their PRO RATA share of foreign income taxes in computing their
taxable income or to claim a foreign tax credit against U.S. income taxes. No
deduction for foreign taxes may be claimed by a shareholder who does not itemize
deductions. Foreign shareholders may not deduct or claim a credit for foreign
tax unless the dividends paid to them by the Fund are effectively connected with
a U.S. trade or business. Accordingly, a foreign shareholder may recognize
additional taxable income as a result of the Fund's election to pass through the
foreign taxes to shareholders.
 
    The amount of foreign taxes for which a shareholder may claim a credit in
any year will generally be subject to a separate limitation for "passive income"
which includes, among other things, dividends, interest and certain foreign
currency gains. Gain from the sale of a security will be treated as derived from
sources within the United States, potentially reducing the amount allowable as a
credit under the limitation.
 
    Each shareholder will be notified within 60 days after the close of the
Fund's taxable year whether the foreign taxes paid by the Fund will "pass
through" for that year and, if so, such notification will designate (a) the
shareholder's portion of the foreign taxes paid by the Fund and (b) the portion
of the dividend which represents income derived from foreign sources.
 
    The tax consequences to a foreign shareholder entitled to claim the benefits
of an applicable tax treaty may be different from those described herein.
Foreign shareholders are advised to consult their own tax advisers with respect
to the particular tax consequences to them of an investment in the Fund.
 
    Under the laws of certain states, distributions of net income may be taxable
to shareholders as income even though a portion of such distributions may be
derived from interest on U.S. Government obligations which, if realized
directly, would be exempt from state income taxes. Shareholders are advised to
consult their tax advisers concerning the application of state and local taxes.
 
    The Trust under which the Funds are created is organized as a Massachusetts
business trust. Under current law, so long as the Funds qualify for federal
income tax treatment as described above, it is believed that neither the Trust
nor the Funds should be liable for any income or franchise tax in The
Commonwealth of Massachusetts.
 
                              CALCULATION OF YIELD
 
    Each Fund will prepare a current quotation of yield daily. The yield quoted
will be the simple annualized yield for an identified seven calendar day period.
The yield calculation will be based on a hypothetical account having a balance
of exactly one share at the beginning of the seven-day period. The base period
return will be the change in the value of the hypothetical account during the
seven-day period, including dividends declared on any shares purchased with
dividends on the shares, but excluding any
 
                                      B-20
<PAGE>
capital changes, divided by the value of the account at the beginning of the
base period. The yield will vary as interest rates and other conditions
affecting money market instruments change. Yield also depends on the quality,
length of maturity and type of instruments in a Fund's portfolio, and its
operating expenses. Each Fund also may prepare an effective annual yield
computed by compounding the unannualized seven-day period return as follows: by
adding 1 to the unannualized seven-day period return, raising the sum to a power
equal to 365 divided by 7, and subtracting 1 from the result.
 
    Effective yield = [(base period return+1)TO THE POWER OF 365/7]-1
 
    The yield and effective yield for NMMF based on the 7 days ended September
30, 1998 were 4.83% and 4.95%, respectively. The yield and effective yield for
LAF based on 7 days ended September 30, 1998 were 5.43% and 5.58%, respectively.
 
    Comparative performance information may be used from time to time in
advertising or marketing the Funds' shares, including data from Lipper
Analytical Services, Inc., Morningstar Publications, Inc., IBC Financial Data,
Inc., The Bank Rate Monitor, other industry publications, business periodicals
and market indices.
 
    Each Fund's yield fluctuates, and an annualized yield quotation is not a
representation by the Fund as to what an investment in the Fund will actually
yield for any given period. Actual yields will depend upon not only changes in
interest rates generally during the period in which the investment in a Fund is
held, but also on changes in the Fund's expenses. Yield does not take into
account any federal or state income taxes.
 
                                      B-21
<PAGE>
                                                     CASH ACCUMULATION TRUST
Portfolio of Investments as of September 30, 1998    NATIONAL MONEY MARKET FUND
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
Principal                                                        
Amount                                                           
(000)        Description                     Value (Note 1)      
<C>          <S>                                    <C>          
- ------------------------------------------------------------
Bank Notes--8.2%
             Bank of America National Trust &
                Savings
                Association
   $8,1002   5.55%, 10/21/98                        $  8,100,000
             Corestates Bank N.A.
     4,000   5.53984%, 10/16/98(b)                     4,000,000
             FCC National Bank
     3,000   5.19%, 1/15/99                            3,000,000
             First National Bank of Chicago
     3,000   5.19%, 1/14/99                            3,000,000
             First Union National Bank
     6,000   5.57%, 10/15/98                           5,999,903
             Keybank N.A.
     7,000   5.60%, 10/1/98(b)                         6,998,133
     1,000   5.6775%, 10/13/98(b)                      1,000,159
             Nationsbank N.A.
     1,500   5.62%, 10/1/98(b)                         1,500,541
             US Bank N.A.
     8,000   5.565%, 10/8/98                           7,998,398
                                                    ------------
                                                      41,597,134
- ------------------------------------------------------------
Certificates of Deposit - Domestic--0.4%
             First Tennessee Bank N.A.
     1,000   5.45%, 11/16/98                           1,000,080
     1,000   5.46%, 11/24/98                           1,000,119
                                                    ------------
                                                       2,000,199
- ------------------------------------------------------------
Certificates of Deposit - Eurodollar--0.4%
             Bank of Scotland
     2,000   5.34%, 12/29/98                           2,000,049
- ------------------------------------------------------------
Certificates of Deposit - Yankee--22.5%
             Bank of Montreal
    10,000   5.30%, 10/30/98                          10,000,000
             Barclays Bank PLC
    12,000   5.510%, 10/2/98(b)                       11,993,660
             Bayerische Landesbank Girozentrale
    10,000   5.24%, 10/30/98(b)                        9,994,038
Certificates of Deposit - Yankee (cont'd.)
             Bayerishe Hypotheken Und Wechsel
                Bank
    $2,000   5.675%, 3/3/99                         $  1,999,639
             Canadian Imperial Bank of Commerce
    24,000   5.55%, 2/10/99                           23,995,836
             Deutsche Bank
     5,000   5.62%, 2/26/99                            4,999,028
     3,000   5.63%, 2/26/99                            2,998,951
     6,000   5.66%, 3/3/99                             5,998,795
             ING Bank N.V.
     5,000   5.585%, 11/12/98                          5,001,765
             Rabobank Nederland N.V.
     9,000   5.50%, 2/9/99                             8,997,520
             Royal Bank of Canada
     7,000   5.624%, 10/6/98(b)                        6,995,970
    10,000   5.460%, 10/15/98(b)                       9,993,481
             Swiss Bank Corp.
    11,000   5.74%, 6/11/99                           10,995,619
                                                    ------------
                                                     113,964,302
- ------------------------------------------------------------
Commercial Paper--52.1%
             Aetna Services, Inc.
     4,000   5.56%, 10/23/98                           3,986,409
             Aon Corp.
     4,000   5.55%, 10/19/98                           3,988,900
             Aristar, Inc.
     2,000   5.61%, 10/16/98                           1,995,325
             Associates First Capital Corp.
     5,000   5.55%, 10/19/98                           4,986,125
             Baker Hughes, Inc.
     1,000   5.80%, 10/1/98                            1,000,000
             Bank One Corp
    10,537   5.90%, 10/1/98                           10,537,000
             BBL North America Funding, Inc.
     2,000   5.54%, 10/13/98                           1,996,307
     7,000   5.31%, 12/31/98                           6,906,042
             Bradford & Bingley Building Society
     1,000   5.26%, 12/29/98                             986,996
             Caisse Des Depots Et Consignations
    25,100   5.75%, 10/1/98                           25,100,000
             Centric Capital Corp.
     7,000   5.60%, 10/2/98                            6,998,911
    11,500   5.23%, 11/30/98                          11,399,758
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-22
 

<PAGE>
                                                     CASH ACCUMULATION TRUST
Portfolio of Investments as of September 30, 1998    NATIONAL MONEY MARKET FUND
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
Principal                                                        
Amount                                                           
(000)        Description                     Value (Note 1)      
<C>          <S>                                    <C>          
- ------------------------------------------------------------
Commercial Paper (cont'd.)
             CIT Group Holdings, Inc.
    $3,000   5.24%, 12/22/98                        $  2,964,193
     1,000   5.24%, 12/23/98                             987,919
             Coca-Cola Enterprises, Inc.
     6,196   5.35%, 12/2/98                            6,138,911
             Commercial Credit Co.
     2,000   5.35%, 10/16/98                           1,995,542
             Cooper Industries, Inc.
     4,000   5.80%, 10/1/98                            4,000,000
             Countrywide Home Loan, Inc.
     1,000   5.60%, 10/19/98                             997,200
     4,000   5.32%, 11/27/98                           3,966,307
             Den Danske Corp.
     9,000   5.19%, 12/2/98                            8,920,852
             Falcon Asset Securitization Corp.
     3,200   5.26%, 11/20/98                           3,176,622
     2,000   5.26%, 12/3/98                            1,981,590
             Finova Capital Corp.
     2,000   5.35%, 11/13/98                           1,987,219
             Ford Motor Credit Co.
     5,000   5.25%, 11/20/98                           4,963,542
     7,000   5.3975%, 1/14/99                          7,000,000
             General Electric Capital Corp.
     3,100   5.47%, 11/19/98                           3,076,920
             Internationale Nederlanden U.S.
                Funding Corp.
     2,000   5.26%, 12/28/98                           1,974,284
     2,000   5.25%, 12/29/98                           1,974,042
             Martin Marietta Material
     5,000   5.55%, 10/28/98                           4,979,187
     5,000   5.65%, 10/29/98                           4,978,028
             Merrill Lynch & Co., Inc.
    12,000   5.42%, 11/13/98                          11,922,313
             Monte Rosa Capital Corp.
     7,000   5.60%, 10/15/98                           6,984,756
             National Bank of Canada
     9,000   5.17%, 12/30/98                           8,883,675
             NationsBank Corp.
     6,000   5.56%, 10/19/98                           5,983,320
             Nationwide Building Society
     7,000   5.40%, 12/10/98                           6,926,500
             Nordbanken North America, Inc.
    $5,000   5.38%, 12/18/98                        $  4,941,717
             Norwest Financial, Inc.
     3,000   5.25%, 12/18/98                           2,965,875
             Old Line Funding Corp.
     9,000   5.55%, 10/23/98                           8,969,475
             San Paolo U.S. Financial Co.
     8,500   6.00%, 10/1/98                            8,500,000
             Sony Capital Corp.
    17,000   5.36%, 11/24/98                          16,863,320
             Special Purpose Accounts Recreation
                Cooperative Corp.
     3,000   5.51%, 11/13/98                           2,980,256
             Thunder Bay Funding Inc.
     6,000   5.57%, 10/29/98                           5,974,007
             Windmill Funding Corp.
     4,300   5.40%, 10/20/98                           4,287,745
             Wood Street Funding Corp.
     2,885   5.65%, 10/16/98                           2,878,208
     5,685   5.55%, 11/2/98                            5,656,954
    13,936   5.55%, 11/16/98                          13,837,171
                                                    ------------
                                                     264,499,423
- ------------------------------------------------------------
Loan Participations--1.4%
             Baker Hughes, Inc.
     7,000   5.80%, 10/1/98                            7,000,000
- ------------------------------------------------------------
Other Corporate Obligations--20.6%
             Abbey National Treasury Services PLC
    21,000   5.50%, 2/5/99                            20,994,330
             Chase Manhattan Corp.
     3,000   5.6875%, 10/15/98(b)                      3,000,045
             Chrysler Financial Corp.
    10,000   5.56703%, 10/21/98(b)                    10,000,637
             General Electric Capital Corp.
     5,000   5.50%, 10/5/98(b)                         4,995,983
             General Motors Acceptance Corp.
     5,000   5.6275%, 11/12/98(b)                      4,999,731
     5,000   5.6075%, 11/24/98(b)                      4,999,527
     1,000   7.75%, 1/15/99                            1,005,970
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-23
 

<PAGE>
                                                     CASH ACCUMULATION TRUST
Portfolio of Investments as of September 30, 1998    NATIONAL MONEY MARKET FUND
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
Principal                                                        
Amount                                                           
(000)        Description                     Value (Note 1)      
<C>          <S>                                    <C>          
- ------------------------------------------------------------
Other Corporate Obligations (cont'd.)
             International Lease Finance Corp.
    $2,400   8.35%, 10/1/98                         $  2,400,000
     2,235   6.625%, 4/1/99                            2,243,708
             Liquid Asset Backed Securities
                Trust,
                Ser. 1997-7
     5,237   5.58594%, 10/22/98(a)(b)
                (cost $5,236,779; purchased
                12/19/97)                              5,236,779
             Ser. 1998-1
     3,646   5.52734%, 10/26/98(a)(b)
                (cost $3,646,009; purchased
                2/26/98)                               3,646,009
             Restructured Asset Securities,
    11,000   5.64234%, 10/2/98(b)                     11,000,000
     1,000   5.375%, 10/30/98(a)(b)
                (cost $1,000,000; purchased
                4/2/98)                                1,000,000
             Strategic Money Market Trust,
                Ser. 1997-A
    21,000   5.50%, 12/16/98(b)                       21,000,000
             Ser. 1998-B
     5,000   5.625%, 10/5/98(b)                        5,000,000
             UBS Finance (Delaware) Inc.
     3,200   6.20%, 10/1/98                            3,200,000
                                                    ------------
                                                     104,722,719
- ------------------------------------------------------------
Time Deposit - Eurodollar--0.6%
             Suntrust Bank, Atlanta
     2,961   5.875%, 10/1/98                           2,961,000
- ------------------------------------------------------------
U.S. Government Agency & Instrumentality
Obligations - Discount--0.6%
             Federal National Mortgage Assoc.
     2,000   5.25%, 12/23/98                           1,975,792
             Federal Home Loan Mortgage Corp.
     1,000   5.25%, 12/3/98                              990,812
                                                    ------------
                                                       2,966,604
Total Investments--106.8%
             (amortized cost $541,711,430(c))       $541,711,430
             Liabilities in excess of other
                assets--(6.8%)                      (34,423,630)
                                                    ------------
             Net Assets--100%                       $507,287,800
                                                    ------------
                                                    ------------
</TABLE>
- ---------------
(a) Indicates a restricted security; the aggregate cost and value of such
    securities are both $9,882,788. The aggregate value is approximately 1.9% of
    net assets.
(b) Variable rate instrument. The maturity date presented for these instruments
    is the later of the next date on which the security can be redeemed at par
    or the next date on which the rate of interest is adjusted.
(c) The cost for federal income tax purposes is substantially the same as for
    financial reporting purposes.
The industry classification of portfolio holdings and other assets in excess of
liabilities shown as a percentage of net assets as of September 30, 1998 was as
follows:
<TABLE>
<S>                                                  <C>
Commercial Banks                                      56.3%
Asset Backed Securities                               14.8
Short-Term Business Credit                             7.7
Motor Vehicle Parts                                    6.5
Bank Holding Companies-Domestic                        3.8
Phono, Records, Tape, Disk                             3.3
Security Brokers & Dealers                             2.4
Personal Credit Institutions                           2.3
Mining                                                 2.0
Oil Construction Equipment                             1.6
Accident & Health Insurance                            1.6
Beverages                                              1.2
Mortgage Banks                                         1.0
Equipment Rental & Leasing                             0.9
Miscellaneous Electrical Equipment & Supplies          0.8
Federal Credit Agencies                                0.6
                                                     -----
                                                     106.8%
Liabilities in excess of other assets                 (6.8)
                                                     -----
                                                     100.0%
                                                     -----
                                                     -----
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-24
 

<PAGE>
                                                 CASH ACCUMULATION TRUST
Statement of Assets and Liabilities              NATIONAL MONEY MARKET FUND
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
Assets                                                                                                      September 30, 1998
<S>                                                                                                          <C>
Investments, at amortized cost which approximates market value.........................................         $541,711,430
Receivable for Fund shares sold........................................................................           17,193,466
Interest receivable....................................................................................            3,583,962
Prepaid expenses and other assets......................................................................              141,768
                                                                                                             ------------------
   Total assets........................................................................................          562,630,626
                                                                                                             ------------------
Liabilities
Payable for investments purchased......................................................................           32,845,077
Payable for Fund shares reacquired.....................................................................           21,531,356
Dividends payable......................................................................................              463,761
Accrued expenses and other liabilities.................................................................              295,571
Management fee payable.................................................................................              164,804
Distribution fee payable...............................................................................               42,257
                                                                                                             ------------------
   Total liabilities...................................................................................           55,342,826
                                                                                                             ------------------
Net Assets.............................................................................................         $507,287,800
                                                                                                             ------------------
                                                                                                             ------------------
Net assets were comprised of:
   Shares of beneficial interest, at $.00001 par value.................................................         $      5,073
   Paid-in capital in excess of par....................................................................          507,282,727
                                                                                                             ------------------
Net assets, September 30, 1998.........................................................................         $507,287,800
                                                                                                             ------------------
                                                                                                             ------------------
Net asset value, offering price and redemption price per share
   ($507,287,800 / 507,287,800 shares of beneficial interest issued and outstanding)...................                   $1.00
                                                                                                             ------------------
                                                                                                             ------------------
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-25
 

<PAGE>

CASH ACCUMULATION TRUST
NATIONAL MONEY MARKET FUND
Statement of Operations
- ------------------------------------------------------------
<TABLE>
<CAPTION>
                                                Year Ended
Net Investment Income                       September 30, 1998
<S>                                         <C>
Income
   Interest..............................      $ 31,153,367
                                            ------------------
Expenses
   Management fee........................         2,098,187
   Distribution fee......................           549,801
   Transfer agent's fees and expenses....           335,000
   Registration fees.....................           130,000
   Reports to shareholders...............           100,000
   Custodian's fees and expenses.........            88,000
   Audit fees and expenses...............            27,000
   Legal fees and expenses...............            30,000
   Trustees' fees........................            12,500
   Miscellaneous.........................            13,426
                                            ------------------
      Total expenses.....................         3,383,914
                                            ------------------
Net Investment Income and Net Increase in
Net Assets
Resulting from Operations................      $ 27,769,453
                                            ------------------
                                            ------------------
</TABLE>
 
CASH ACCUMULATION TRUST
NATIONAL MONEY MARKET FUND
Statement of Changes in Net Assets
- ------------------------------------------------------------
<TABLE>
<CAPTION>
Decrease in                          Year Ended September 30,
Net Assets                            1998              1997
<S>                              <C>               <C>
Operations
   Net investment income and
      net increase in net
      assets resulting from
      operations...............  $   27,769,453    $   33,771,657
                                 --------------    --------------
Dividends and distributions to
   shareholders (Note 1).......     (27,769,453)      (33,771,657)
                                 --------------    --------------
Fund share transactions (at $1
   per share)
   Net proceeds from shares
      sold.....................   5,056,612,846     6,248,712,913
Net asset value of shares
   issued in reinvestment of
   dividends and
   distributions...............      24,443,399        32,440,525
Cost of shares reacquired......  (5,275,771,195)(a) (6,231,478,119)
                                 --------------    --------------
Net increase (decrease) in net
   assets from Fund share
   transactions................    (194,714,950)       49,675,319
                                 --------------    --------------
Total increase (decrease)......    (194,714,950)       49,675,319
Net Assets
Beginning of year..............     702,002,750       652,327,431
                                 --------------    --------------
End of year....................  $  507,287,800    $  702,002,750
                                 --------------    --------------
                                 --------------    --------------
- ---------------
(a) Includes $295,683,132 that was transferred into Liquid Assets
    Fund. (see Note 4.)
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-26
 

<PAGE>
                                               CASH ACCUMULATION TRUST
Notes to Financial Statements                  NATIONAL MONEY MARKET FUND
- --------------------------------------------------------------------------------
Cash Accumulation Trust (the "Trust") is registered under the Investment Company
Act of 1940 as an open-end, diversified management investment company. The Trust
consists of two series--the National Money Market Fund (the "Fund") and the
Liquid Assets Fund. The investment objective of the Fund is current income to
the extent consistent with the preservation of capital and liquidity. The Fund
invests primarily in a portfolio of U.S. Government obligations, financial
institution obligations and other high quality money market instruments maturing
in thirteen months or less whose ratings are within the two highest ratings
categories by a nationally recognized statistical rating organization or, if not
rated, are of comparable quality. The ability of the issuers of the securities
held by the Fund to meet its obligations may be affected by economic
developments in a specific industry or region.
- ------------------------------------------------------------
NOTE 1. ACCOUNTING POLICIES

The following is a summary of significant accounting policies followed by the
Trust and the Fund in the preparation of its financial statements.

SECURITIES VALUATIONS: Portfolio securities are valued at amortized cost, which
approximates market value. The amortized cost method involves valuing a security
at its cost on the date of purchase and thereafter assuming a constant
amortization to maturity of any discount or premium.

SECURITIES TRANSACTIONS AND NET INVESTMENT INCOME: Securities transactions are
recorded on the trade date. Realized gains and losses on sales of investments
are calculated on the identified cost basis. Interest income is recorded on the
accrual basis. Expenses are recorded on the accrual basis, which may require the
use of certain estimates by management.

FEDERAL INCOME TAXES: For federal income tax purposes, each fund in the Trust is
treated as a separate taxpaying entity. It is the intent of the Fund to continue
to meet the requirements of the Internal Revenue Code applicable to regulated
investment companies and to distribute all of its taxable net income to its
shareholders. Therefore, no federal income tax provision is required.

DIVIDENDS AND DISTRIBUTIONS: The Fund declares all of its net investment income
and net realized short-term capital gains or losses, if any, as dividends daily
to its shareholders of record at the time of such declaration. Net investment
income for dividend purposes includes interest accrued or discount earned less
amortization of premium and the estimated expenses applicable to the dividend
period. The Fund does not expect to realize long-term capital gains or losses.

NOTE 2. AGREEMENTS
The Trust has a management agreement with Prudential Investments Fund Management
LLC ("PIFM") as of December 12, 1997. (Prior to December 12, 1997, the Fund had
a management agreement with PIMCO Advisors L.P. ("PIMCO"). PIMCO had a
subadvisory agreement with Columbus Circle Investors.) Pursuant to this
agreement, PIFM has responsibility for all investment advisory services and
supervises the subadviser's performance of such services. PIFM has entered into
a subadvisory agreement with The Prudential Investment Corporation ("PIC"); PIC
furnishes investment advisory services in connection with the management of the
Trust. PIFM pays for the cost of the subadviser's services, the compensation of
officers of the Trust, occupancy and certain clerical and bookkeeping costs of
the Fund. The Trust bears all other costs and expenses.

Beginning December 22, 1997, the management fee paid PIFM is computed daily and
payable monthly, at an annual rate of .39% of the Fund's average daily net
assets up to and including $1 billion, .375% of the next $500 million, .35% of
the next $500 million and .325% of the Fund's average daily net assets in excess
of $2 billion. The management fee paid to PIMCO through December 11, 1997 was
computed daily and payable monthly at an annual rate of .425% of the Fund's
average daily net assets up to and including $500 million, .400% of the next
$500 million, .375% of the next $500 million, .350% of the next $500 million and
 .325% of the Fund's average daily net assets in excess of $2 billion.

The Trust had a distribution agreement with Prudential Securities Incorporated
("PSI") which acted as the distributor of the shares of the Trust from December
12, 1998 through May 31, 1998. Prudential Investment Management Services LLC
("PIMS") became the distributor of the Trust effective June 1, 1998 and is
serving the Trust under the same terms and conditions as under the arrangement
with PSI. The Fund compensated PSI and PIMS for distributing and servicing the
Fund's shares pursuant to the plan of distribution at an annual rate of .10 of
1% of the average daily net assets of the shares, regardless of expenses
actually incurred by them. The distribution fees are accrued daily and payable
monthly. Prior to December 12, 1997, PIMCO Funds Distribution Company served as
the Trust's distributor and was compensated at the same rate.

PSI, PIFM, PIC and PIMS are indirect, wholly owned subsidiaries of The
Prudential Insurance Company of America.
- --------------------------------------------------------------------------------
                                      B-27
 

<PAGE>
                                               CASH ACCUMULATION TRUST
Notes to Financial Statements                  NATIONAL MONEY MARKET FUND
- --------------------------------------------------------------------------------
NOTE 3. OTHER TRANSACTIONS WITH AFFILIATES
On December 12, 1997, Prudential Mutual Fund Services LLC ("PMFS"), a wholly
owned subsidiary of PIFM, began serving as the Fund's transfer agent. Prior to
December 12, 1997, Shareholder Services, Inc. ("SSI") served as the Fund's
transfer agent. During the period December 12, 1997 through September 30, 1998,
the Fund incurred fees of approximately $210,200 for the services of PMFS. As of
September 30, 1998, $20,800 of such fees were due to PMFS. Transfer agent fees
and expenses in the Statement of Operations include fees paid to SSI and certain
out-of-pocket expenses paid to nonaffiliates.
- ------------------------------------------------------------
NOTE 4. CAPITAL
On December 22, 1997, $295,683,132 was transferred from the Fund to the Liquid
Assets Fund. The transfer established the Liquid Assets Fund as the primary
money sweep fund for certain investment advisory clients of Prudential
Securities enrolled in Prudential Securities' automatic investment procedures
(Autosweep) program.
- ------------------------------------------------------------
NOTE 5. CHANGE IN CUSTODIAN AND ACCOUNTING AGENT
As of December 12, 1997, the custodian and accounting agent is State Street Bank
and Trust Company. Prior to December 12, 1997, Oppenheimer Funds, Inc. served as
the Fund's accounting agent and The Bank of New York served as the custodian.
- --------------------------------------------------------------------------------
                                       B-28
 

<PAGE>
                                              CASH ACCUMULATION TRUST
Financial Highlights                          NATIONAL MONEY MARKET FUND
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                   Year Ended September 30,
                                                                 ------------------------------------------------------------
                                                                   1998         1997         1996         1995         1994
                                                                 --------     --------     --------     --------     --------
<S>                                                              <C>          <C>          <C>          <C>          <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of year...........................    $   1.00     $   1.00     $   1.00     $   1.00     $   1.00
Net investment income........................................        0.05         0.05         0.05         0.05         0.03
Dividends and distributions to shareholders..................       (0.05)       (0.05)       (0.05)       (0.05)       (0.03)
                                                                 --------     --------     --------     --------     --------
Net asset value, end of year.................................    $   1.00     $   1.00     $   1.00     $   1.00     $   1.00
                                                                 --------     --------     --------     --------     --------
                                                                 --------     --------     --------     --------     --------
TOTAL RETURN(a):.............................................         5.2%         5.0%         5.0%         5.2%         3.2%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period (000)..............................    $507,288     $702,003     $652,327     $685,228     $823,343
Ratios to average net assets:
   Expenses, including distribution fee......................        0.62%        0.65%        0.69%        0.69%        0.61%
   Expenses, excluding distribution fee......................        0.52%        0.55%        0.59%        0.59%        0.51%
   Net investment income.....................................        5.05%        4.89%        4.86%        5.15%        3.20%
</TABLE>
- ------------------------------
(a) Total return is calculated assuming a purchase of shares on the first day
    and a sale on the last day of each period reported and includes reinvestment
    of dividends and distributions.
- --------------------------------------------------------------------------------
See Notes to Financial Statements.      B-29
 

<PAGE>
                                                CASH ACCUMULATION TRUST
Report of Independent Accountants               NATIONAL MONEY MARKET FUND
- --------------------------------------------------------------------------------
To the Shareholders and Board of Trustees of
Cash Accumulation Trust
National Money Market Fund

In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of Cash Accumulation Trust--National
Money Market Fund (the "Fund", one of the portfolios constituting Cash
Accumulation Trust) at September 30, 1998, the results of its operations for the
year then ended, and the changes in its net assets and the financial highlights
for each of the two years in the period then ended, in conformity with generally
accepted accounting principles. These financial statements and financial
highlights (hereafter referred to as "financial statements") are the
responsibility of the Fund's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these financial statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits, which included confirmation of securities at September 30, 1998 by
correspondence with the custodian and brokers, provide a reasonable basis for
the opinion expressed above. The accompanying financial highlights for each of
the three years in the period ended September 30, 1996 were audited by other
independent accountants, whose opinion dated October 23, 1996 was unqualified.

PricewaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York
November 20, 1998

                                       B-30
<PAGE>
                                                        CASH ACCUMULATION TRUST
Portfolio of Investments as of September 30, 1998       LIQUID ASSETS FUND
- ------------------------------------------------------------
<TABLE>
<CAPTION>
Principal
Amount
(000)        Description                     Value (Note 1)
<C>          <S>                                    <C>
- ------------------------------------------------------------
Bank Notes--6.3%
             Comerica Bank
   $10,000   5.46%, 10/19/98(b)                     $  9,995,291
             Corestates Bank
     2,000   5.540%, 10/16/98(b)                       2,000,000
             FCC National Bank
     2,000   5.19%, 1/15/99                            2,000,000
             First National Bank
     3,000   5.19%, 1/14/99                            3,000,000
             First Union National Bank
     5,000   5.57%, 10/15/98                           4,999,919
             Key Bank N.A.
     4,000   5.60%, 10/1/98(b)                         3,998,933
     1,000   5.62%, 10/1/98(b)                           999,825
     1,000   5.678%, 10/13/98(b)                       1,000,159
                                                    ------------
                                                      27,994,127
- ------------------------------------------------------------
Bankers Acceptance - Yankee--0.4%
             Wachovia Bank, N.A.
     2,000   5.40%, 10/29/98                           1,991,600
- ------------------------------------------------------------
Certificates Of Deposit - Domestic--0.9%
             First Tennessee Bank N.A.
     1,000   5.45%, 11/16/98                           1,000,081
     1,000   5.46%, 11/24/98                           1,000,119
     1,000   5.40%, 12/16/98                           1,000,298
             Nationsbank, N.A.
     1,000   5.84%, 12/28/98                           1,000,536
                                                    ------------
                                                       4,001,034
- ------------------------------------------------------------
Certificates Of Deposit - Eurodollar--1.8%
             Abbey National Treasury Services PLC
     2,000   5.52%, 1/22/99                            1,997,937
     2,000   5.75%, 3/5/99                             2,000,000
             Bank of Scotland
     2,000   5.34%, 12/29/98                           2,000,049
             Bayerische Hypotheken Und Weschel
                Bank
     1,000   5.93%, 11/25/98                           1,000,049
             Bayerische Vereinsbank Ag
    $1,000   5.60%, 2/2/99                          $    999,165
                                                    ------------
                                                       7,997,200
- ------------------------------------------------------------
Certificates Of Deposit - Yankee--14.9%
             Barclays Bank PLC
     9,000   5.510%, 10/2/98(b)                        8,995,245
    10,000   5.53%, 2/23/99                            9,997,713
             Bayerische Landesbank Girozentrale
     5,000   5.24%, 10/30/98(b)                        4,997,019
             Bayerische Vereinsbank
     1,000   5.58%, 10/9/98                              999,993
             Canadian Imperial Bank of Commerce
     6,000   5.55%, 2/10/99                            5,998,959
             Credit Agricole Indosuez
     3,000   5.74%, 4/26/99                            2,999,023
             Credit Communal De Belgique S.A.
     6,000   5.65%, 10/21/98                           6,000,000
             Deutsche Bank
     5,000   5.57%, 2/26/99                            4,999,028
     3,000   5.62%, 2/26/99                            2,999,417
     3,000   5.63%, 2/26/99                            2,998,951
     3,000   5.66%, 3/3/99                             2,999,397
             Rabobank Nederland N.V.
     4,000   5.50%, 2/9/99                             3,998,898
             Royal Bank of Canada
     7,000   5.624%, 10/6/98(b)                        6,995,970
             Societe Generale
       705   5.56%, 1/19/99                              704,453
                                                    ------------
                                                      65,684,066
- ------------------------------------------------------------
Commercial Paper--56.0%
             Aetna Services, Inc.
    20,000   5.55%, 10/16/98                          19,953,750
             Aristar, Inc.
     3,000   5.61%, 10/16/98                           2,992,988
             Associates Corp. of North America
     3,912   5.51%, 11/10/98                           3,888,050
             Bank of New York Co., Inc.
     2,700   5.52%, 10/8/98                            2,697,102
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-31

<PAGE>
                                                        CASH ACCUMULATION TRUST
Portfolio of Investments as of September 30, 1998       LIQUID ASSETS FUND
- ------------------------------------------------------------
<TABLE>
<CAPTION>
Principal
Amount
(000)        Description                     Value (Note 1)
<C>          <S>                                    <C>
- ------------------------------------------------------------
Commercial Paper (cont'd.)
             BCI Funding Corp.
    $1,000   5.25%, 10/30/98                        $    995,771
             Bl North America
     4,000   5.54%, 10/13/98                           3,992,613
     5,000   5.53%, 10/19/98                           4,986,175
     5,000   5.515%, 10/28/98                          4,979,319
             Bradford & Bingley Building Society
     1,000   5.26%, 12/29/98                             986,996
             Chrysler Financial Corp.
    10,000   5.52%, 10/14/98                           9,980,067
             CIT Group Holdings, Inc.
     3,000   5.24%, 12/23/98                           2,963,757
             Coca-Cola Enterprises, Inc.
     1,000   5.56%, 10/14/98                             997,992
     5,000   5.57%, 11/4/98                            4,973,697
             Commerzbank U.S. Finance, Inc.
     9,000   5.52%, 10/21/98                           8,972,400
             Countrywide Home Loan, Inc.
     3,000   5.60%, 10/19/98                           2,991,600
     1,000   5.33%, 11/20/98                             992,597
     1,000   5.32%, 11/27/98                             991,577
             Den Denske Corp.
     6,000   5.26%, 12/2/98                            5,970,193
             Duke Capital Corp.
     4,000   5.56%, 10/16/98                           3,990,733
             Falcon Asset Securitization Corp.
     2,000   5.26%, 12/3/98                            1,981,590
             General Electric Capital Corp.
    13,000   5.27%, 10/27/98                          12,950,521
       130   5.51%, 11/19/98                             129,025
     1,500   5.19%, 12/11/98                           1,484,646
             General Motors Acceptance Corp.
     7,800   5.53%, 10/19/98                           7,778,433
             General Motors Corp.
     3,000   5.54%, 10/16/98                           2,993,075
             GTE Funding, Inc.
     8,414   5.28%, 10/27/98                           8,381,915
             Halliburton Corp.
     1,000   5.52%, 10/15/98                             997,853
             Internationale Nederland en U.S.
                Funding Corp.
    $2,000   5.26%, 12/28/98                        $  1,974,284
     1,000   5.25%, 12/29/98                             987,021
             Johnson Controls, Inc.
     1,000   5.60%, 10/29/98                             995,644
     1,000   5.59%, 10/30/98                             995,497
             Merrill Lynch & Co., Inc.
    10,000   5.42%, 11/13/98                           9,935,261
             Mont Blanc Capital Corp.
    17,784   5.57%, 10/21/98                          17,728,968
             Monte Rosa Capital Corp.
     4,846   5.60%, 10/15/98                           4,835,447
     2,424   5.54%, 10/27/98                           2,414,301
             Morgan (J.P.) & Co., Inc.
     9,000   5.50%, 10/19/98                           8,975,250
             National Australia Funding, Inc.
     5,000   5.51%, 10/22/98                           4,983,929
             NationsBank Corp.
       800   5.60%, 10/8/98                              799,129
     3,000   5.50%, 2/12/99                            2,938,583
             Nationwide Building Society
     2,000   5.51%, 10/14/98                           1,996,021
             Old Line Funding Corp.
     2,000   5.55%, 10/16/98                           1,995,375
     3,428   5.55%, 10/23/98                           3,416,373
     3,000   5.57%, 10/28/98                           2,987,468
     1,000   5.52%, 11/5/98                              994,633
             Safeco Corp.
     5,000   5.54%, 10/13/98                           4,990,767
     8,000   5.54%, 10/27/98                           7,967,991
             Skandinaviska Enskilda Banken
     2,000   5.27%, 10/1/98                            1,991,509
    10,882   5.80%, 10/1/98                           10,882,000
             Sonoco Products Co.
     1,500   5.80%, 10/1/98                            1,500,000
             Special Purpose Accounts Recreation
                Cooperative Corp.
     3,000   5.55%, 10/22/98                           2,990,288
             The Travelers, Inc.
     2,000   5.53%, 10/14/98                           1,996,006
             Thunder Bay Funding, Inc.
     4,000   5.60%, 10/15/98                           3,991,289
     1,000   5.60%, 10/26/98                             996,111
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-32

<PAGE>
                                                        CASH ACCUMULATION TRUST
Portfolio of Investments as of September 30, 1998       LIQUID ASSETS FUND
- ------------------------------------------------------------
<TABLE>
<CAPTION>
Principal
Amount
(000)        Description                     Value (Note 1)
<C>          <S>                                    <C>
- ------------------------------------------------------------
Commercial Paper (cont'd.)
             Windmill Funding Corp.
    $2,731   5.85%, 10/1/98                         $  2,731,000
       138   5.53%, 10/6/98                              137,894
     4,000   5.50%, 10/9/98                            3,995,111
             Wood Street Funding Corp.
     4,950   5.55%, 10/16/98                           4,938,553
     4,315   5.55%, 11/2/98                            4,293,713
                                                    ------------
                                                     247,349,851
- ------------------------------------------------------------
Other Corporate Obligations--22.5%
             Abbey National Treasury Services PLC
     7,331   5.50%, 2/5/99(b)                          7,329,021
     2,000   5.72%, 6/11/99                            1,998,938
             Ford Motor Credit Co.
    22,000   5.40%, 1/14/99                           21,916,000
             General Electric Capital Corp.
     7,000   5.50%, 10/5/98(b)                         6,994,376
             General Motors Acceptance Corp.
    13,000   5.668%, 11/2/98(b)                       12,998,717
             International Business Machines
     6,000   5.529%, 10/1/98(b)                        5,997,090
             Lehman Brothers Holdings, Inc.
     8,000   5.593%, 10/1/98(b)                        8,000,000
             Liquid Asset Backed Securities Trust
     2,188   5.527%, 2/26/99(b)                        2,187,606
             Restructured Asset Securities
    10,000   5.64%, 10/2/98(b)                        10,000,000
     1,000   5.375%, 10/30/98(b)(c)                    1,000,000
             Strategic Money Market Trust, Series
                1998-B
    15,000   5.625%, 10/5/98(b)                       15,000,000
             Strats Trust
     6,000   5.593%, 10/19/98(b)(c)                    6,000,000
                                                    ------------
                                                      99,421,748
- ------------------------------------------------------------
U.S. Government Agency Obligations-Discount--2.7%
             Federal Home Loan Mortgage Corp.
     9,000   4.95%, 2/24/99                            8,819,325
     1,000   5.25%, 12/3/98                              990,812
             Federal National Mortgage Assoc.
    $2,000   5.25%, 12/23/98                        $  1,975,792
                                                    ------------
                                                      11,785,929
Total Investments--105.5%
             (amortized cost $466,225,555(a))        466,225,555
             Liabilities in excess of other
                assets--(5.5%)                      (24,281,067)
                                                    ------------
             Net Assets--100%                       $441,944,488
                                                    ------------
                                                    ------------
</TABLE>

(a) The cost of securities for federal income tax purposes is substantially the
    same as for financial reporting purposes.
(b) Variable rate instrument. The maturity date presented for these instruments
    is the later of the next date on which the security can be redeemed at par
    or the next date on which the rate of interest is adjusted.
(c) Private placement restricted as to resale and does not have a readily
    available market; the aggregate cost of such securities is $7,000,000. The
    aggregate value ($7,000,000) is approximately 2.7% of net assets.
The industry classification of portfolio holdings and liabilities in excess of
other assets shown as a percentage of net assets as of September 30, 1998 was as
follows:

<TABLE>
<S>                                                    <C>
Commercial Banks....................................    46.6%
Asset Backed Securities.............................    13.8
Motor Vehicles......................................     9.7
Securities Brokers & Dealers........................     6.1
Business Credit (Finance)...........................     5.6
Life Insurance......................................     4.5
Fire Insurance......................................     3.4
Mortgage Banks......................................     3.2
Bank Holding Companies..............................     2.9
U.S. Gov't Agency...................................     2.7
Telephone & Communications..........................     1.9
Personal Credit Institutions........................     1.6
Office Machines.....................................     1.4
Electrical Services.................................     0.9
Regulating Controls.................................     0.5
Paper Board Mills...................................     0.3
Beverages...........................................     0.2
Construction........................................     0.2
                                                       -----
                                                       105.5
Liabilities in excess of other assets                   (5.5)
                                                       -----
                                                       100.0%
                                                       -----
                                                       -----
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-33

<PAGE>
                                                     CASH ACCUMULATION TRUST
Statement of Assets and Liabilities                  LIQUID ASSETS FUND
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                                                December 22,
                                                                                                                   1997(a)
                                                                                                                   Through
Assets                                                                                                         March 31, 1998
<S>                                                                                                           <C>
Investments, at amortized cost which approximates market value..........................................        $ 466,225,555
Cash....................................................................................................                  739
Receivable for Fund shares sold.........................................................................            9,888,416
Interest receivable.....................................................................................            2,591,843
Prepaid expenses and other assets.......................................................................                3,644
                                                                                                              -----------------
   Total assets.........................................................................................          478,710,197
                                                                                                              -----------------
Liabilities
Payable for investments purchased.......................................................................           23,877,703
Payable for Fund shares reacquired......................................................................           12,192,892
Dividends payable.......................................................................................              461,512
Accrued expenses........................................................................................              131,822
Management fee payable..................................................................................              101,780
                                                                                                              -----------------
   Total liabilities....................................................................................           36,765,709
                                                                                                              -----------------
Net Assets..............................................................................................        $ 441,944,488
                                                                                                              -----------------
Net assets were comprised of:
   Shares of beneficial interest, at par................................................................        $       4,419
   Paid-in capital in excess of par.....................................................................          441,940,069
                                                                                                              -----------------
Net assets, September 30, 1998..........................................................................        $ 441,944,488
                                                                                                              -----------------
                                                                                                              -----------------
Net asset value, offering and redemption price per share
   ($441,944,488 / 441,944,488 shares of beneficial interest issued and outstanding)....................                  $1.00
                                                                                                              -----------------
                                                                                                              -----------------
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-34

<PAGE>
CASH ACCUMULATION TRUST
LIQUID ASSETS FUND
Statement of Operations
- ------------------------------------------------------------
<TABLE>
<CAPTION>
                                                  December 22,
                                                     1997(a)
                                                     Through
                                                  September 30,
Net Investment Income                                 1998
<S>                                               <C>
Income
   Interest....................................    $ 16,647,803
                                                  -------------
Expenses
   Management fee..............................         190,000
   Registration fees...........................         163,000
   Transfer agent's fees and expenses..........          93,000
   Custodian's fees and expenses...............          61,000
   Legal fees and expenses.....................          41,000
   Audit fee and expenses......................          27,000
   Reports to shareholders.....................          20,000
   Trustees' fees and expenses.................           9,000
   Miscellaneous...............................           7,150
                                                  -------------
      Total expenses...........................         611,150
                                                  -------------
Net investment income..........................      16,036,653
                                                  -------------
Realized Gain on Investments
Net realized gain on investment transactions...           7,050
                                                  -------------
Net Increase in Net Assets
Resulting from Operations......................    $ 16,043,703
                                                  -------------
                                                  -------------
</TABLE>
- ---------------
(a) Commencement of investment operations.

CASH ACCUMULATION TRUST
LIQUID ASSETS FUND
Statement of Changes in Net Assets
- ------------------------------------------------------------
<TABLE>
<CAPTION>
                                                 December 22,
                                                    1997(a)
                                                    Through
Increase (Decrease)                              September 30,
in Net Assets                                        1998
<S>                                             <C>
Operations
   Net investment income......................  $    16,036,653
   Net realized gain on investment
      transactions............................            7,050
                                                ---------------
   Net increase in net assets resulting from
      operations..............................       16,043,703
                                                ---------------
Dividends and distributions (Note 1)..........      (16,043,703)
                                                ---------------
Fund share transactions
   Net proceeds from shares sold..............    3,011,683,905(b)
   Net asset value of shares issued in
      reinvestment of dividends and
      distributions...........................       15,377,615
   Cost of shares reacquired..................   (2,585,117,032)
                                                ---------------
   Net increase in net assets from Fund share
      transactions............................      441,944,488
                                                ---------------
   Total increase.............................      441,944,488
Net Assets
Beginning of period...........................               --
                                                ---------------
End of period.................................  $   441,944,488
                                                ---------------
                                                ---------------
- ---------------
(b) Includes $295,683,132 that was transferred from the
    National Money Market Fund. (See Note 4)
</TABLE>
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-35

<PAGE>
                                                       CASH ACCUMULATION TRUST
Notes to Financial Statements                          LIQUID ASSETS FUND
- --------------------------------------------------------------------------------
Cash Accumulation Trust (the "Trust") is registered under the Investment Company
Act of 1940 as an open-end, diversified management investment company. The Trust
consists of two series - the National Money Market Fund and the Liquid Assets
Fund (the "Fund"). The Fund commenced investment operations on December 22,
1997, when $295,683,132 was transferred from the National Money Market Fund to
the Fund. The investment objective of the Fund is current income to the extent
consistent with the preservation of capital and liquidity. The Fund invests
primarily in a portfolio of U.S. Government obligations, financial institution
obligations and other high quality money market instruments maturing in thirteen
months or less whose ratings are within the two highest ratings categories by a
nationally recognized statistical rating organization or, if not rated, are of
comparable quality. The ability of the issuers of the securities held by the
Fund to meet its obligations may be affected by economic developments in a
specific industry or region.
- ------------------------------------------------------------
NOTE 1. ACCOUNTING POLICIES

The following is a summary of significant accounting policies followed by the
Trust and the Fund in the preparation of its financial statements.

SECURITIES VALUATIONS: Portfolio securities are valued at amortized cost, which
approximates market value. The amortized cost method involves valuing a security
at its cost on the date of purchase and thereafter assuming a constant
amortization to maturity of any discount or premium.

SECURITIES TRANSACTIONS AND NET INVESTMENT INCOME: Securities transactions are
recorded on the trade date. Realized gains and losses on sales of investments
are calculated on the identified cost basis. Interest income is recorded on the
accrual basis. Expenses are recorded on the accrual basis which may require the
use of certain estimates by management.

FEDERAL INCOME TAXES: For Federal income tax purposes, each fund in the Trust is
treated as a separate tax paying entity. It is the intent of the Fund to meet
the requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable net income to its shareholders.
Therefore, no federal income tax provision is required.

DIVIDENDS AND DISTRIBUTIONS: The Fund declares all of its net investment income
and net realized short-term capital gains or losses, if any, as dividends daily
to its shareholders of record at the time of such declaration. Net investment
income for dividend purposes includes interest accrued or discount earned less
amortization of premium and the estimated expenses applicable to the dividend
period. Payment of dividends is made monthly. The Fund does not expect to
realize long-term capital gains or losses.

NORE 2. AGREEMENTS

The Trust has a management agreement with Prudential Investments Fund Management
LLC ("PIFM"). Pursuant to this agreement, PIFM has responsibility for all
investment advisory services and supervises the subadviser's performance of such
services. PIFM has entered into a subadvisory agreement with The Prudential
Investment Corporation ("PIC"), doing business as Prudential Investments ("PI",
the Subadviser or the investment adviser). PI furnishes investment advisory
services in connection with the management of the Trust. PIFM pays for the cost
of the subadviser's services, the compensation of officers of the Trust,
occupancy and certain clerical and bookkeeping costs of the Trust. The Trust
bears all other costs and expenses.

Under the management agreement, PIFM is reimbursed by the Fund for its direct
administrative costs and expenses, excluding overhead and profit incurred in
providing services to the Fund up to a maximum of .39% of the average daily net
assets.

The Trust had a distribution agreement with Prudential Securities Incorporated
("PSI") which acted as the distributor of the shares of the Trust through May
31, 1998. Prudential Investment Management Services LLC ("PIMS") became the
distributor of the Trust effective June 1, 1998 and is serving the Trust under
the same terms and conditions as under the arrangement with PSI. No distribution
or service fees are paid to PIMS as distributor of the Fund.

PIFM, PIC and PIMS are wholly owned subsidiaries of The Prudential Insurance
Company of America.
- ------------------------------------------------------------
NOTE 3. OTHER TRANSACTIONS WITH AFFILIATES

Prudential Mutual Fund Services LLC ("PMFS"), a wholly owned subsidiary of PIFM,
serves as the Fund's transfer agent. Transfer agent fees and expenses in the
Statement of Operations include certain out-of-pocket expenses paid to
nonaffiliates.
- ------------------------------------------------------------
NOTE 4. CAPITAL

On December 22, 1997, $295,683,132 was transferred from the National Money
Market Fund to the Fund. The transfer established the Liquid Assets Fund as the
primary money sweep fund for certain investment advisory clients of Prudential
Securities enrolled in Prudential Securities' automatic investment procedures
(Autosweep) program.
- --------------------------------------------------------------------------------
                                       B-36

<PAGE>
                                                       CASH ACCUMULATION TRUST
Financial Highlights (Unaudited)                       LIQUID ASSETS FUND
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                                                    December 22,
                                                                                                                       1997(a)
                                                                                                                       Through
                                                                                                                    September 30,
                                                                                                                        1998
                                                                                                                    -------------
<S>                                                                                                                 <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period...........................................................................       $    1.00
                                                                                                                    -------------
Net investment income and net realized gains...................................................................             .04
Dividends and distributions to shareholders....................................................................            (.04)
                                                                                                                    -------------
Net asset value, end of period.................................................................................       $    1.00
                                                                                                                    -------------
                                                                                                                    -------------
TOTAL RETURN(b):...............................................................................................            4.52%
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period (000)................................................................................       $ 441,944
Average net assets (000).......................................................................................       $ 374,141
Ratios to average net assets:
   Expenses....................................................................................................             .21%(c)
   Net investment income.......................................................................................            5.53%(c)
</TABLE>
- ---------------
(a) Commencement of investment operations.
(b) Total return is calculated assuming a purchase of shares on the first day
    and a sale on the last day of each period reported and includes reinvestment
    of dividends and distributions. Total returns for less than a full year are
    not annualized.
(c) Annualized.
- --------------------------------------------------------------------------------
See Notes to Financial Statements.     B-37

<PAGE>
                                                        CASH ACCUMULATION TRUST
Report of Independent Accountants                       LIQUID ASSETS FUND
- --------------------------------------------------------------------------------
To the Shareholders and Board of Trustees of
Cash Accumulation Trust--Liquid Assets Fund

In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of Cash Accumulation Trust--Liquid
Assets Fund (the "Fund" one of the portfolios constituting Cash Accumulation
Trust) at September 30, 1998, and the results of its operations, the changes in
its net assets and the financial highlights for the period December 22, 1997
(commencement of operations) through September 30, 1998, in conformity with
generally accepted accounting principles. These financial statements and
financial highlights (hereafter referred to as "financial statements") are the
responsibility of the Fund's management; our responsibility is to express an
opinion on these financial statements based on our audit. We conducted our audit
of these financial statements in accordance with generally accepted auditing
standards which require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audit, which included confirmation of securities at September 30, 1998 by
correspondence with the custodian and brokers, provides a reasonable basis for
the opinion expressed above.

PricewaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York
November 20, 1998

                                       B-38

<PAGE>
                       APPENDIX I--DESCRIPTION OF RATINGS
 
BOND RATINGS
 
    MOODY'S INVESTORS SERVICE--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 edged." 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. 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 Aaa securities. 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 some time in the future. Mood's
applies numerical modifiers "1", "2" and "3" in each generic rating
classification from Aa through B in its corporate bond rating system. The
modifier "1" indicates that the company ranks in the higher end of its generic
rating category; the modifier "2" indicates a mid-range ranking; and the
modifier "3" indicates that the company ranks in the lower end of its generic
rating category.
 
    STANDARD & POOR'S RATINGS GROUP--Debt rated AAA has the highest rating
assigned by S&P. Capacity to pay interest and repay principal is extremely
strong. Debt rated AA has a very strong capacity to pay interest and repay
principal and differs from the highest rated issues only in small degree. 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.
 
    DUFF AND PHELPS CREDIT RATING CO.--The following summarizes the ratings used
by Duff & Phelps for long-term debt:
 
       "AAA": Highest credit quality. The risk factors are negligible, being
       only slightly more than for risk-free U.S. Treasury debt.
 
       "AA+", "AA" or "AA-": High credit quality. Protection factors are strong.
       Risk is modest but may vary slightly from time to time because of
       economic conditions.
 
       "A+", "A" or "A-": Protection factors are average but adequate. However,
       risk factors are more variable and greater in periods of economic stress.
 
    FITCH IBCA--The following summarizes the ratings used by Fitch IBCA for
long-term debt:
 
       "AAA": Highest credit quality. "AAA" ratings denote the lowest
       expectation of credit risk. They are assigned only in case of
       exceptionally strong capacity for timely payment of financial
       commitments. This capacity is highly unlikely to be adversely affected by
       foreseeable events.
 
       "AA": Very high credit quality. "AA" ratings denote a very low
       expectation of credit risk. They indicate very strong capacity for timely
       payment of financial commitments. This capacity is not significantly
       vulnerable to foreseeable events.
 
       "A": High credit quality. "A" ratings denote a low expectation of credit
       risk. The capacity for timely payment of financial commitments is
       considered strong. This capacity may, nevertheless, be more vulnerable to
       changes in circumstances or in economic conditions than is the case for
       higher ratings.
 
       "BBB": Good credit quality. "BBB" ratings indicate that there is
       currently a low expectation of credit risk. The capacity for timely
       payment of financial commitments is considered adequate, but adverse
       changes in circumstances and in economic conditions are more likely to
       impair this capacity. This is the lowest investment grade category.
 
"+" or "-" may be appended to a rating to denote relative status within major
rating categories. Such suffixes are not added to the "AAA" long-term rating
category or to categories below "CCC".
 
COMMERCIAL PAPER RATINGS
 
    Moody's short-term debt ratings are opinions of the ability of issuers to
repay punctually senior debt obligations which have an original maturity not
exceeding one year. Issuers rated "Prime-1" (or supporting institutions) have a
superior ability for
 
                                      I-I
<PAGE>
repayment of senior short-term debt obligations. Issuers rated "Prime-2" (or
supporting institutions) have a strong ability for repayment of senior
short-term debt obligations. Issuers rated "Prime-3" (or supporting
institutions) have an acceptable ability for repayment of senior short-term
obligations.
 
    An S&P commercial paper rating is a current assessment of the likelihood of
timely payment of debt considered short-term in the relevant market. The
designation A-1 indicates that the degree of safety regarding timely payment is
strong. A "+" designation is applied to those issues rated A-1 which possess
extremely strong safety characteristics. Capacity for timely payment on issues
with the designation A-2 is satisfactory. However, the relative degree of safety
is not as high as for issues designated A-1. Issues carrying the designation A-3
have adequate capacity for timely payment. They are however, somewhat more
vulnerable to the adverse effects of changes in circumstances than obligations
carrying the higher designations.
 
    The following summarizes the ratings used by Duff & Phelps for short-term
debt, which apply to all obligations with maturities of under one year,
including commercial paper.
 
    D-1+: Highest certainty of timely payment. Short-term liquidity, including
internal operating factors and/or access to alternative sources of funds, is
outstanding and safety is just below risk-free U.S. Treasury short-term
obligations.
 
    D-1: Very high certainty of timely payment. Liquidity factors are excellent
and supported by good fundamental protection factors. Risk factors are minor.
 
    D-1-: High certainty of timely payment. Liquidity factors are strong and
supported by good fundamental protection factors. Risk factors are very small.
 
    D-2: Good certainty of timely payment. Liquidity factors and company
fundamentals are sound. Although ongoing funding needs may enlarge total
financing requirements, access to capital markets is good. Risk factors are
small.
 
    D-3: Satisfactory liquidity and other protection factors qualify issue as to
investment grade. Risk factors are larger and subject to more variation.
Nevertheless, timely payment is expected.
 
    The following summarizes the ratings used by Fitch IBCA for short-term debt,
which apply to most obligations with maturities of less than 12 months, or up to
three years for U.S. public finance securities:
 
    "F1": Highest credit quality. Indicates the strongest capacity for timely
payment of financial commitments; may have an added "+" to denote any
exceptionally strong credit feature.
 
    "F2": Good credit quality. A satisfactory capacity for timely payment of
financial commitments, but the margin of safety is not as great as in the case
of the higher ratings.
 
    "F3": Fair credit quality. The capacity for timely payment of financial
commitments is adequate, however, near-term adverse changes could result in a
reduction to non-investment grade.
 
    "B": Speculative. Minimal capacity for timely payment of financial
commitments, plus vulnerability to near-term adverse changes in financial and
economic conditions.
 
    "C": High default risk. Default is a real possibility. Capacity for meeting
financial commitments is solely reliant upon a sustained, favorable business and
economic environment.
 
    "D": Default. Denotes actual or imminent payment default.
 
"+" or "-" may be appended to a rating to denote relative status within major
rating categories. Such suffixes are not added to short-term ratings other than
"F1".
 
                                      I-II
<PAGE>
                APPENDIX II--INFORMATION RELATING TO PRUDENTIAL
 
    Set forth below is information relating to The Prudential Insurance Company
of America (Prudential) and its subsidiaries as well as information relating to
the Prudential Mutual Funds. See "Manager" in the Prospectus. The data will be
used in sales materials relating to the Prudential Mutual Funds. Unless
otherwise indicated, the information is as of December 31, 1995 and is subject
to change thereafter. All information relies on data provided by The Prudential
Investment Corporation (PIC) or from other sources believed by the Manager to be
reliable. Such information has not been verified by the Fund.
 
INFORMATION ABOUT PRUDENTIAL
 
    The Manager and PIC(1) are subsidiaries of Prudential, which is one of the
largest diversified financial services institutions in the world and, based on
total assets, the largest insurance company in North America as of December 31,
1996. Principal products and services include life and health insurance, other
healthcare products, property and casualty insurance, securities brokerage,
asset management, investment advisory services and real estate brokerage.
Prudential (together with its subsidiaries) employs almost 79,000 persons
worldwide, and maintains a sales force of approximately 10,100 agents and nearly
6,500 financial advisors. Prudential is a major issuer of annuities, including
variable annuities. Prudential seeks to develop innovative products and services
to meet consumer needs in each of its business areas. Prudential uses the rock
of Gibraltar as its symbol. The Prudential rock is a recognized brand name
throughout the world.
 
    INSURANCE. Prudential has been engaged in the insurance business since 1875.
It insures or provides financial services to nearly 40 million people worldwide.
Long one of the largest issuers of individual life insurance, the Prudential has
25 million life insurance policies and group certificates in force today with a
face value of almost $1 trillion. Prudential has the largest capital base ($12.3
billion) of any life insurance company in the United States. Prudential provides
auto insurance for approximately 1.5 million cars and insures approximately 1.2
million homes.
 
    MONEY MANAGEMENT. Prudential is one of the largest pension fund managers in
the country, providing pension services to 1 in 3 Fortune 500 firms. It manages
$36 billion of individual retirement plan assets, such as 401(k) plans. As of
December 31, 1997, Prudential had more than $370 billion in assets under
management. Prudential Investments, a business group of Prudential (of which
Prudential Mutual Funds is a key part) manages over $211 billion in assets of
institutions and individuals. In Pensions & Investments, May 12, 1997,
Prudential was ranked third in terms of total assets under management.
 
    REAL ESTATE. Prudential Real Estate Affiliates, the fourth largest real
estate brokerage network in the United States, has more than 37,000 brokers and
agents across the United States.(2)
 
    HEALTHCARE. Over two decades ago, Prudential introduced the first
federally-funded, for-profit HMO in the country. Today, approximately 4.9
million Americans receive healthcare from a Prudential managed care membership.
 
    FINANCIAL SERVICES. The Prudential Bank, a wholly-owned subsidiary of
Prudential, has over $4 billion in assets and serves nearly 1.5 million
customers across 50 states.
 
INFORMATION ABOUT THE PRUDENTIAL MUTUAL FUNDS
 
    As of December 31, 1997, Prudential Investments Fund Management LLC is the
eighteenth largest mutual fund company in the country, with over 2.5 million
shareholders invested in more than 50 mutual fund portfolios and variable
annuities with more than 3.7 million shareholder accounts.
 
    The Prudential Mutual Funds have over 30 portfolio managers who manage over
$55 billion in mutual fund and variable annuity assets. Some of Prudential's
portfolio managers have over 20 years of experience managing investment
portfolios.
 
    From time to time, there may be media coverage of portfolio managers and
other investment professionals associated with the Manager and the Subadviser in
national and regional publications, on television and in other media.
Additionally, individual mutual fund portfolios are frequently cited in surveys
conducted by national and regional publications and media organizations such as
THE WALL STREET JOURNAL, THE NEW YORK TIMES, BARRON'S and USA TODAY.
 
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(1)Prudential Investments, a business group of PIC, serves as the subadviser to
substantially all of the Prudential Mutual Funds. Wellington Management Company
serves as subadviser to Global Utility Fund, Inc., Nicholas-Applegate Capital
Management as the subadviser to Nicholas-Applegate Fund, Inc., Jennison
Associates LLC as one of the subadvisers to The Prudential Investment
Portfolios, Inc. and Mercator Assets Management LP, as the subadviser to
International Stock Series, a portfolio of Prudential World Fund, Inc. There are
multiple subadvisers for The Target Portfolio Trust.
(2)As of December 31, 1996.
 
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<PAGE>
    EQUITY FUNDS. FORBES magazine listed Prudential Equity Fund among twenty
mutual funds on its Honor Roll in its mutual fund issue of August 28, 1995.
Honorees are chosen annually among mutual funds (excluding sector funds) which
are open to new investors and have had the same management for at least five
years. Forbes considers, among other criteria, the total return of a mutual fund
in both bull and bear markets as well as a fund's risk profile. Prudential
Equity Fund is managed with a "value" investment style by PIC. In 1995,
Prudential Securities introduced Prudential Jennison Fund, a growth-style equity
fund managed by Jennison Associates Capital Corp., a premier institutional
equity manager and a subsidiary of Prudential.
 
    HIGH YIELD FUNDS. Investing in high yield bonds is a complex and research
intensive pursuit. A separate team of high yield bond analysts monitor
approximately 200 issues held in the Prudential High Yield Fund (currently the
largest fund of its kind in the country) along with 100 or so other high yield
bonds, which may be considered for purchase.(3) Noninvestment grade bonds, also
known as junk bonds or high yield bonds, are subject to a greater risk of loss
of principal and interest including default risk than higher-rated bonds.
Prudential high yield portfolio managers and analysts meet face-to-face with
almost every bond issuer in the High Yield Fund's portfolio annually, and have
additional telephone contact throughout the year.
 
    Prudential's portfolio managers are supported by a large and sophisticated
research organization. Fourteen investment grade bond analysts monitor the
financial viability of approximately 1,750 different bond issuers in the
investment grade corporate and municipal bond markets--from IBM to small
municipalities, such as Rockaway Township, New Jersey. These analysts consider
among other things sinking fund provisions and interest coverage ratios.
 
    Prudential's portfolio managers and analysts receive research services from
almost 200 brokers and market service vendors. They also receive nearly 100
trade publications and newspapers--from PULP AND PAPER FORECASTER to WOMEN'S
WEAR DAILY--to keep them informed of the industries they follow.
 
    Prudential Mutual Funds' traders scan over 100 computer monitors to collect
detailed information on which to trade. From natural gas prices in the Rocky
Mountains to the results of local municipal elections, a Prudential portfolio
manager or trader is able to monitor it if it's important to a Prudential mutual
fund.
 
    Prudential Mutual Funds trade approximately $31 billion in U.S. and foreign
government securities a year. PIC seeks information from government policy
makers. In 1995, Prudential's portfolio managers met with several senior U.S.
and foreign government officials, on issues ranging from economic conditions in
foreign countries to the viability of index-linked securities in the United
States.
 
    Prudential Mutual Funds' portfolio managers and analysts met with over 1,200
companies in 1995, often with the Chief Executive Officer (CEO) or Chief
Financial Officer (CFO). They also attended over 250 industry conferences.
 
    Prudential Mutual Fund global equity managers conducted many of their visits
overseas, often holding private meetings with a company in a foreign language
(our global equity managers speak 7 different languages, including Mandarin
Chinese).
 
    TRADING DATA.(4) On an average day, Prudential Mutual Funds' U.S. and
foreign equity trading desks traded $77 million in securities representing over
3.8 million shares with nearly 200 different firms. Prudential Mutual Funds'
bond trading desks traded $157 million in government and corporate bonds on an
average day. That represents more in daily trading than most bond funds tracked
by Lipper even have in assets.(5) Prudential Mutual Funds' money market desk
traded $3.2 billion in money market securities on an average day, or over $800
billion a year. They made a trade every 3 minutes of every trading day. In 1994,
the Prudential Mutual Funds effected more than 40,000 trades in money market
securities and held on average $20 billion of money market securities.(6)
 
    Based on complex-wide data, on an average day, over 7,250 shareholders
telephoned Prudential Mutual Fund Services, Inc., the Transfer Agent of the
Prudential Mutual Funds, on the Prudential Mutual Funds' toll-free number. On an
annual basis, that represents approximately 1.8 million telephone calls
answered.
 
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(3)As of December 31, 1995. The number of bonds and the size of the Fund are
subject to change.
(4)Trading data represents average daily transactions for portfolios of the
Prudential Mutual Funds for which PIC serves as the subadviser, portfolios of
the Prudential Series Fund and institutional and non-US accounts managed by
Prudential Mutual Fund Investment Management, a division of PIC, for the year
ended December 31, 1995.
(5)Based on 669 funds in Lipper Analytical Services categories of Short U.S.
Treasury, Short U.S. Government, Intermediate U.S. Treasury, Intermediate U.S.
Government, Short Investment Grade Debt, Intermediate Investment Grade Debt,
General U.S. Treasury, General U.S. Government and Mortgage funds.
(6)As of December 31, 1994.
 
                                     II-II
<PAGE>
INFORMATION ABOUT PRUDENTIAL SECURITIES
 
    Prudential Securities is the fifth largest retail brokerage firm in the
United States with approximately 6,000 financial advisors. It offers to its
clients a wide range of products, including Prudential Mutual Funds and
annuities. As of December 31, 1997, assets held by Prudential Securities for its
clients approximated $235 billion.
 
    During 1997, approximately 29,000 new customer accounts were opened each
month at Prudential Securities.(7)
 
    Prudential Securities has a two-year Financial Advisor training program plus
advanced education programs, including Prudential Securities "university," which
provides advanced education in a wide array of investment areas. Prudential
Securities is the only Wall Street firm to have its own in-house Certified
Financial Planner (CFP) program. In the December 1995 issue of REGISTERED REP,
an industry publication, Prudential Securities Financial Advisor training
programs received a grade of A- (compared to an industry average of B+).
 
    In 1995, Prudential Securities' equity research team ranked 8th in
INSTITUTIONAL INVESTOR magazine's 1995 "All America Research Team" survey. Five
Prudential Securities analysts were ranked as first-team finishers.(8)
 
    In addition to training, Prudential Securities provides its financial
advisors with access to firm economists and market analysts. It has also
developed proprietary tools for use by financial advisors, including the
Financial Architect, a state-of-the-art asset allocation software program which
helps Financial Advisors to evaluate a client's objectives and overall financial
plan, and a comprehensive mutual fund information and analysis system that
compares different mutual funds.
 
    Standard & Poor's rates Prudential Securities Incorporated BBB+, with a
"stable outlook."
 
    For more complete information about any of the Prudential Mutual Funds,
including charges and expenses, call your Prudential Securities financial
advisor or Pruco/Prudential representative for a free prospectus. Read it
carefully before you invest or send money.
 
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(7)As of December 31, 1997.
(8)On an annual basis, INSTITUTIONAL INVESTOR magazine surveys more than 700
institutional money managers, chief investment officers and research directors,
asking them to evaluate analysts in 76 industry sectors. Scores are produced by
taking the number of votes awarded to an individual analyst and weighting them
based on the size of the voting institution. In total, the magazine sends its
survey to approximately 2,000 institutions and a group of European and Asian
institutions.
 
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