RBB FUND INC
497, 1998-12-04
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<PAGE>
 
                     N/I NUMERIC INVESTORS family of funds



                   N/I NUMERIC INVESTORS Small Cap Value Fund



                        _______________________________

                       advised by NUMERIC INVESTORS LP(R)
                        _______________________________



                                                                      Prospectus

                                                                December 1, 1998
<PAGE>
 
          NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS OR IN RBB'S STATEMENT OF
ADDITIONAL INFORMATION INCORPORATED HEREIN BY REFERENCE, IN CONNECTION WITH THE
OFFERING MADE BY THIS PROSPECTUS AND, IF GIVEN OR MADE, SUCH REPRESENTATIONS
MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY RBB OR ITS DISTRIBUTOR.
THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFERING BY RBB OR BY THE DISTRIBUTOR IN
ANY JURISDICTION IN WHICH SUCH OFFERING MAY NOT LAWFULLY BE MADE.



                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
INTRODUCTION..............................................................     1
INVESTMENT OBJECTIVE AND POLICIES.........................................     6
INVESTMENT LIMITATIONS....................................................    11
MANAGEMENT................................................................    12
FUND TRANSACTIONS.........................................................    14
HOW TO PURCHASE SHARES....................................................    15
HOW TO REDEEM SHARES......................................................    19
NET ASSET VALUE...........................................................    21
DIVIDENDS AND DISTRIBUTIONS...............................................    22
DESCRIPTION OF SHARES.....................................................    23
OTHER INFORMATION.........................................................    24
APPENDIX A - PERFORMANCE BENCHMARKS.......................................   A-1
</TABLE>

                               INVESTMENT ADVISER
                             Numeric Investors L.P.
                            Cambridge, Massachusetts

                                   CUSTODIAN
                            Custodial Trust Company
                             Princeton, New Jersey

         CO-ADMINISTRATOR, TRANSFER AGENT AND DIVIDEND DISBURSING AGENT
                                   PFPC Inc.
                              Wilmington, Delaware

                                CO-ADMINISTRATOR
                       Bear Stearns Funds Management Inc.
                               New York, New York

                                      -i-
<PAGE>
 
                         ADMINISTRATIVE SERVICES AGENT
                          Provident Distributors, Inc.
                        West Conshohocken, Pennsylvania

                                  DISTRIBUTOR
                          Provident Distributors, Inc.
                        West Conshohocken, Pennsylvania

                                    COUNSEL
                           Drinker Biddle & Reath LLP
                           Philadelphia, Pennsylvania

                            INDEPENDENT ACCOUNTANTS
                           PricewaterhouseCoopers LLP
                           Philadelphia, Pennsylvania

                                     -ii-
<PAGE>
 
                     N/I NUMERIC INVESTORS family of funds
                                      of
                              The RBB Fund, Inc.

     The N/I NUMERIC INVESTORS family of funds consists of five classes of
common stock of The RBB Fund, Inc. ("RBB"), an open-end management investment
company. The shares ("Shares") offered by this Prospectus represent interests in
the N/I NUMERIC INVESTORS Small Cap Value Fund (the "Fund"), one of the
investment portfolios of RBB. The investment objective of the Fund is as
follows:

          N/I NUMERIC INVESTORS SMALL CAP VALUE FUND - to provide long-term
     capital appreciation.  The Fund invests generally in common stock of
     companies with smaller ($1.5 billion or less) market capitalizations.  The
     stock selection process for this Fund is primarily driven by the value
     stock model which seeks to identify companies whose securities have market
     valuations that are lower than the average market valuations of securities,
     as measured by such characteristics as price to earnings ratios and price
     to book ratios.  Also considered, but of less importance, is the growth
     stock model which seeks to identify companies whose earnings per share are
     improving more rapidly than the earnings per share of the average company.

IMPORTANT FUND CLOSING INFORMATION

     NUMERIC INVESTORS L.P. ("NUMERIC"), THE FUND'S INVESTMENT ADVISER, WILL
MONITOR THE FUND'S TOTAL ASSETS AND MAY CLOSE THE FUND AT ANY TIME TO NEW
INVESTMENT DUE TO CONCERNS THAT AN INCREASE IN THE SIZE OF THE FUND MAY
ADVERSELY AFFECT THE IMPLEMENTATION OF NUMERIC'S INVESTMENT STRATEGY. NUMERIC
MAY ALSO CHOOSE TO REOPEN A CLOSED FUND TO NEW INVESTMENT AT ANY TIME, AND MAY
SUBSEQUENTLY CLOSE SUCH FUND AGAIN SHOULD CONCERNS REGARDING FUND SIZE RECUR.

     Shares of the N/I NUMERIC INVESTORS family of funds are not deposits or
obligations of, or guaranteed or endorsed by, PNC Bank, National Association or
any other bank and shares are not federally insured by the Federal Deposit
Insurance Corporation, the Federal Reserve Board, or any other agency.
Investments in N/I NUMERIC INVESTORS family of funds Shares involve investment
risks, including the possible loss of principal.

     This Prospectus contains information that a prospective investor needs to
know before investing. Please keep it for future reference. A Statement of
Additional Information, dated December 1, 1998, has been filed with the
Securities and Exchange Commission and is incorporated by reference in this
Prospectus. The Prospectus and Statement of Additional Information are available
for reference, along with other related materials, on the SEC Internet Web Site
(http://www.sec.gov). It may also be obtained free of charge by calling (800)
NUMERIC [(800) 686-3742].
<PAGE>
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION OR
ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

PROSPECTUS                                                      December 1, 1998

                                      -2-
<PAGE>
 
INTRODUCTION

RBB is registered under the Investment Company Act of 1940 (the "1940 Act") as
an open-end management investment company and is currently operating or
proposing to operate seventeen separate investment portfolios.  The class of
Shares offered by this Prospectus represents interests in the N/I NUMERIC
INVESTORS Small Cap Value Fund, one of five investment portfolios of N/I NUMERIC
INVESTORS family of funds.  The other portfolios are:  N/I NUMERIC INVESTORS
Micro Cap Fund; N/I NUMERIC INVESTORS Growth Fund; N/I NUMERIC INVESTORS Growth
& Value Fund; and N/I NUMERIC INVESTORS Larger Cap Value Fund.  RBB was
incorporated under the laws of the State of Maryland on February 29, 1988.

WHO SHOULD INVEST: LONG-TERM INVESTORS SEEKING CAPITAL APPRECIATION

The Fund is intended for investors who are seeking long-term capital
appreciation, and who do not need to earn current income from their investment
in the Fund.  The net asset value per share of Shares representing interests in
the Funds will fluctuate as the value of the portfolio securities change in
response to changing market prices and other factors.  Because of the risks
associated with common stock investments, the Fund is intended to be a long-term
investment vehicle and is not designed to provide investors with a means of
speculating on short-term stock market movements.  The type of stocks held by
the Fund may be more volatile than stocks of larger companies.  Investors should
be able to tolerate sudden, sometimes substantial fluctuations in the value of
their investment.  Investors who engage in excessive account activity generate
additional costs that are borne by all of the Fund's shareholders.  In order to
minimize such costs, the Fund reserves the right to reject any purchase request
(including exchange purchases from other N/I NUMERIC INVESTORS Funds) that is
reasonably deemed to be disruptive to efficient portfolio management, either
because of the timing of the investment or previous excessive trading by the
investor.  Additionally, the Fund has adopted exchange privilege limitations
permitting three exchanges per year as described in the section "Exchange
Privilege Limitations."  Finally, the Fund reserves the right to suspend the
offering of its shares.

Because of these risks, the Fund should not be considered a complete investment
program.  Most investors should maintain diversified holdings of securities with
different risk characteristics--including common stocks, bonds and money market
instruments.  Investors may wish to purchase shares on a regular, periodic basis
(Automatic Investing), rather than investing in one lump sum, in order to reduce
the risk of investing all their monies in common stocks at a particularly
unfavorable time.  Investors may also wish to complement an investment in the
Fund with other types of common stock investments.

FUND MANAGEMENT

Numeric serves as the investment adviser to the Fund.  Numeric specializes in
the active management of U.S. equity portfolios using internally developed
quantitative stock selection and portfolio risk-control techniques, and
currently has over $3.7 billion in assets under management for individual,
limited partnership, mutual fund, offshore fund, pension plan and endowment
accounts.
<PAGE>
 
THE FUND

The investment objective and policies of the Fund are summarized in the table
below.  There is no assurance that the Fund will achieve its investment
objective.

<TABLE>
<CAPTION>
    N/I                               INVESTMENT                               PERFORMANCE
  NUMERIC                          OBJECTIVE/POLICY                            BENCHMARK*
 INVESTORS
    FUND
- ------------------------------------------------------------------------------------------
<S>           <C>                                                         <C>
Small Cap     Objective is to provide long-term capital appreciation.     Russell 2000 Value
 Value        The Fund invests generally in common stock of companies     Index
              with smaller ($1.5 billion or less) market
              capitalizations.  The stock selection process for this
              Fund is primarily driven by the value stock model which
              seeks to identify companies whose securities have market
              valuations that are lower than the average market
              valuations of securities, as measured by such
              characteristics as price to earnings ratios and price to
              book ratios.  Also considered, but of less importance, is
              the growth stock model which seeks to identify companies
              whose earnings per share are improving more rapidly than
              the earnings per share of the average company.
</TABLE>

_____________
*    For more information on the Fund's benchmark, see Appendix A at the back of
     this prospectus.

FEE TABLE

The following table illustrates all expenses and fees (after expected fee
waivers and expense reimbursements) that a shareholder would incur in the Fund.
The expenses and fees in the table for the N/I NUMERIC INVESTORS Small Cap Value
Fund are based on expenses expected to be incurred for the fiscal year ended
August 31, 1999.

SHAREHOLDER TRANSACTION EXPENSES

Maximum Sales Charge Imposed on Purchases (as
percentage of offering price)                                    NONE
Sales Charge Imposed on Reinvested Dividends                     NONE
Redemption Fees                                                  NONE
Exchange Fees/1/                                                 NONE

_____________
1    Exchanges are limited to three (3) per year.  See "How to Purchase 
     Shares -- Exchange Privilege Limitations."

                                      -2-
<PAGE>
 
                         Annual Fund Operating Expenses
                    (as a percentage of average net assets)

                                                                       SMALL CAP
                                                                      VALUE FUND
                                                                      ----------

Management Fees (after waivers)/1/..................................       0.44%
12b-1 Fees..........................................................       None
Other Expenses (after waivers and reimbursements)/1/................       0.56%
Total Fund Operating Expenses, (after waivers and reimbursements)/1/       1.00%
                                                                           =====
_________________

     /1/  Before expense reimbursements and waivers, Management Fees would be
          0.75%, Other Expenses would be 0.75% and Total Fund Operating Expenses
          would be 1.31%.

EXAMPLE

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

                                         ONE  THREE
                                         YEAR  YEARS
                                         ----  -----

Small Cap Value.......................    $10    $32

The Example in the Fee Table assumes that all dividends and distributions are
reinvested and that the amounts listed under "Annual Fund Operating Expenses"
remain the same in the years shown.  THE EXAMPLE SHOULD NOT BE CONSIDERED A
REPRESENTATION OF PAST OR FUTURE INVESTMENT RETURN OR OPERATING EXPENSES AND
ACTUAL INVESTMENT RETURN OR OPERATING EXPENSES MAY BE GREATER OR LESS THAN THOSE
SHOWN.

The Fee Table is designed to assist an investor in understanding the various
costs and expenses that an investor in the Fund will bear directly or
indirectly.  (For more complete descriptions of the various costs and expenses,
see "Management" and "Distribution of Shares" below.)  The Fee Table reflects
expense reimbursements and a voluntary waiver of Management Fees for the Fund
through the current fiscal year.  There can be no assurance that any future
expense reimbursements and waivers (if any) of Management Fees will not vary
from the figures reflected in the Fee Table.  Fee waivers and Expense
reimbursements will have the effect of lowering the Fund's overall expense ratio
and increasing its yield or total return to investors.  "Other Expenses" for the
Fund are based on estimated amounts for the current fiscal year.


_________________

                                      -3-
<PAGE>
 
OFFERING PRICES

Shares of the N/I NUMERIC INVESTORS Small Cap Value Fund are offered to the
public.  Purchase orders receive the next determined net asset value after
receipt of an order in proper form by PFPC Inc. ("PFPC"), the Fund's transfer
agent.  THE SHARES ARE OFFERED ON A NO-LOAD BASIS:  THERE IS NO SALES CHARGE
IMPOSED ON PURCHASES OF SHARES, NOR ARE THE SHARES SUBJECT TO A DISTRIBUTION
("12B-1") FEE.

MINIMUM INITIAL AND SUBSEQUENT INVESTMENTS

The minimum initial investment for the Fund is $3,000.  Subsequent investments
must be $100 or more.  The minimum initial investment for an Automatic
Investment Plan is $1,000 with minimum monthly payments of $100.  The minimum
investment for Individual Retirement Accounts ("IRAs"), or pension, profit-
sharing or other employee benefit plans is $1,000 and minimum subsequent
investments are $100.  See "How to Purchase Shares."

EXCHANGES

Shares of a N/I NUMERIC INVESTORS fund may be exchanged up to three (3) times
per year for Shares of another N/I NUMERIC INVESTORS fund that is not closed to
new investment at the net asset value next determined after receipt by PFPC of
an exchange request.  In addition, RBB reserves the right to impose an
administrative charge for each exchange or to reject any exchange request that
is reasonably deemed to be disruptive to efficient portfolio management.  See
"How to Purchase Shares--Exchange Privilege" and "Exchange Privilege
Limitation."

REDEMPTION PRICE

Shares generally may be redeemed at any time at their net asset value next
determined after receipt by PFPC of a redemption request.  See "How to Redeem
Shares."

RISK FACTORS TO CONSIDER

An investment in the Fund is subject to certain risks, as set forth in detail
under "Investment Objective and Policies."  As with other mutual funds, there
can be no assurance that the Fund will achieve its objective.  In addition to
its principal investment strategy, the Fund, to the extent set forth under
"Investment Objective and Policies," may engage in the following investment
practices: short sales, borrowings, the lending of portfolio securities, and
options and futures transactions.  All of these transactions involve certain
special risks, as set forth under "Investment Objective and Policies."  In
addition, the Fund may be subject to a high portfolio turnover rate.  See
"Investment Objective and Policies--Portfolio Turnover" and "Taxes."

TAX IMPLICATIONS FROM PORTFOLIO TURNOVER

          When the Fund sells a portfolio security, it may recognize a gain
that, for federal tax purposes, may be deemed to be a taxable capital gain.
Certain short-term capital gains typically are 

                                      -4-
<PAGE>
 
taxed at higher rates than are long-term capital gains. A Fund that is subject
to high portfolio turnover rates therefore may experience greater tax
consequences, which are passed to the Fund's shareholders, than a Fund with low
portfolio turnover.

SHAREHOLDER INQUIRIES

For questions regarding shareholder accounts, call toll-free:  1-800-348-5031.
Any questions regarding (i) new or existing accounts or (ii) purchases or
redemptions should be directed to PFPC by writing to it at:

               N/I NUMERIC INVESTORS family of funds
               c/o PFPC Inc.
               Bellevue Park Corporate Center
               400 Bellevue Parkway
               Wilmington, Delaware  19809

For overnight deliveries:

               N/I NUMERIC INVESTORS family of funds
               c/o PFPC Inc.
               Bellevue Park Corporate Center
               400 Bellevue Parkway, Suite 108
               Wilmington, Delaware  19809

or by calling PFPC toll-free at:

               1-800-348-5031.

To request a prospectus, call toll-free:

               1-800 NUMERIC 1-800-686-3742.

For any other questions, call toll-free:

               1-800-NUMERIC 1-800-686-3742.

To reach Numeric and the Fund on the Internet:  Information is available on the
Internet through the World Wide Web.  Shareholders and investment professionals
may obtain information on Numeric and the Fund by accessing:

               http://www.numeric.com

To reach Numeric through e-mail:

               [email protected]

                                      -5-
<PAGE>
 
INVESTMENT OBJECTIVE AND POLICIES

To meet its investment objective, the Fund employs a specific investment style,
as described below.  There is no assurance that the Fund will achieve its
investment objective.

The investment objective of the N/I NUMERIC INVESTORS Small Cap Value Fund is to
provide long-term capital appreciation.  The Fund invests generally in common
stock of companies with smaller ($1.5 billion or less) capitalizations, although
it may also invest in middle market-capitalization companies.  It may also hold
securities which are convertible into common stock, fixed income securities and
money market securities.  Under normal circumstances, the Fund invests at least
65% of its total assets in common stock of companies with market capitalizations
of $1.5 billion or less.  Numeric determines its stock selection decisions for
the Fund primarily on the basis of its value stock model which seeks to identify
companies whose securities have market valuations which are lower than the
average market valuations of securities, as measured by such characteristics as
price to earnings ratios and price to book ratios.  Also considered, but of less
importance, is the growth stock model which seeks to identify companies whose
earnings per share are improving more rapidly than the earnings per share of the
average company.

NUMERIC'S INVESTMENT STYLE.  Numeric employs a quantitative approach to
investment management.  Numeric relies on proprietary quantitative computer
models utilizing internally developed computer technology and financial
databases to assist in the stock selection process.  Numeric's proprietary
models are capable of ranking a large universe of eligible investments using a
wide array of financial data such as market price, book value, earnings, cash
flow and earnings growth rates.  The models also evaluate the degree to which
independent research analysts are changing their earnings forecasts for the
companies they follow.  The models are broadly classified into two types:
Numeric's value stock model seeks to identify companies whose securities have
market valuations that are lower than the average market valuation of
securities, as measured by characteristics including price to earnings ratios
and price to book ratios; Numeric's growth stock model, Estrend, seeks to
identify companies whose earnings per share are improving more rapidly than the
earnings per share of the average company.  Stocks are ranked according to their
relative attractiveness as determined by these models.  These rankings assist
Numeric in constructing a portfolio it believes is invested in the most
attractive securities consistent with a Fund's investment objectives.  The same
investment strategy used to manage a particular Fund also may be used for
institutional accounts managed by Numeric.  These models may be changed
periodically to capture the insights of Numeric's ongoing research efforts.

In pursuing the investment objectives of the Fund,  Numeric may use the
investment instruments and techniques discussed below:

EQUITY MARKETS.  The Fund invests primarily in equity markets at all times.
Equity markets can be highly volatile, so that investing in the Fund involves
substantial risk.  In addition, the Fund can and will typically invest in stocks
that are riskier and more volatile than the average stock.  As a result,
investing in the Fund involves risk of substantial loss of capital.

                                      -6-
<PAGE>
 
SMALL CAP STOCKS.  Securities of companies with small market capitalizations
tend to be riskier than securities of companies with medium or large market
capitalizations.  This is because small cap companies typically have smaller
product lines and less access to liquidity than mid cap or large cap companies,
and are therefore more sensitive to economic downturns.  In addition, growth
prospects of small cap companies tend to be less certain than mid or large cap
companies, and the dividends paid on small cap stocks are frequently negligible.
Moreover, small cap stocks have, on occasion, fluctuated in the opposite
direction of large cap stocks or the general stock market.  Consequently,
securities of small cap companies tend to be more volatile than those of mid and
large cap companies.

MARKET FLUCTUATION.  Because the investment alternatives available to the Fund
may be limited by the specific objective of the Fund, investors should be aware
that an investment in the Fund may be subject to greater market fluctuation than
an investment in a portfolio of securities representing a broader range of
investment alternatives.  In view of the specialized nature of the investment
activities of the Fund, an investment in the Fund should not be considered a
complete investment program.

OPTIONS AND FUTURES.  The Fund may write covered call options, buy put options,
buy call options and write put options, without limitation except as noted in
this paragraph.  Such options may relate to particular securities or to various
indexes and may or may not be listed on a national securities exchange or issued
by the Options Clearing Corporation.  The Fund may also invest in futures
contracts and options on futures contracts (index futures contracts or interest
rate futures contracts, as applicable) for hedging purposes, including
conversion of cash to equity.

Options trading is a highly specialized activity which entails greater than
ordinary investment risks.  A call option for a particular security gives the
purchaser of the option the right to buy, and a writer the obligation to sell,
the underlying security at the stated exercise price at any time prior to the
expiration of the option, regardless of the market price of the security.  The
premium paid to the writer is in consideration for undertaking the obligations
under the option contract.  A put option for a particular security gives the
purchaser the right to sell the underlying security at the stated exercise price
at any time prior to the expiration date of the option, regardless of the market
price of the security.  In contrast to an option on a particular security, an
option on an index provides the holder with the right to make or receive a cash
settlement upon exercise of the option.  The amount of this settlement will be
equal to the difference between the closing price of the index at the time of
exercise and the exercise price of the option expressed in dollars, times a
specified multiple.

The Fund will engage in unlisted over-the-counter options only with broker-
dealers deemed creditworthy by Numeric.  Closing transactions in certain options
are usually effected directly with the same broker-dealer that effected the
original option transaction.  The Fund bears the risk that the broker-dealer
will fail to meet its obligations.  There is no assurance that the Fund will he
able to close an unlisted option position.  Furthermore, unlisted options are
not subject to the protections afforded purchasers of listed options by the
Options Clearing Corporation, which performs the obligations of its members who
fail to do so in connection with the purchase or sale of options.

                                      -7-
<PAGE>
 
To enter into a futures contract, the Fund must make a deposit of an initial
margin either with its custodian in a segregated account in the name of the
futures broker or directly with the futures broker itself.  Subsequent payments
to or from the broker, called variation margin, will be made on a daily basis as
the price of the underlying security or index fluctuates, making the long and
short positions in the futures contracts more or less valuable.

The risks related to the use of options and futures contracts include:  (i) the
correlation between movements in the market price of the Fund's investments
(held or intended for purchase) being hedged and that the price of the futures
contract or option may be imperfect; (ii) possible lack of a liquid secondary
market for closing out options or futures positions; (iii) the need for
additional portfolio management skills and techniques; and (iv) losses due to
unanticipated market movements.  Successful use of options and futures by the
Fund is subject to Numeric's ability to predict correctly movements in the
direction of the market.  For example, if the Fund uses future contracts as a
hedge against the possibility of a decline in the market adversely affecting
securities held by it and securities prices increase instead, the Fund will lose
part or all of the benefit of the increased value of its securities which it has
hedged because it will have approximately equal offsetting losses in its futures
positions.  The risk of loss in trading futures contracts in some strategies can
be substantial, due both to the low margin deposits required, and the extremely
high degree of leverage involved in futures pricing.  As a result, a relatively
small price movement in a futures contract may result in immediate and
substantial loss or gain to the investor.  Thus, a purchase or sale of a futures
contract may result in losses or gains in excess of the amount invested in the
contract.  For a further discussion see "Investment Objective and Policies" in
the Statement of Additional Information.

SHORT SALES.  Short sales are transactions in which the Fund sells a security it
does not own in anticipation of a decline in the market value of that security.
To complete such a transaction, the Fund must borrow the security to make
delivery to the buyer.  The Fund then is obligated to replace the security
borrowed by purchasing it at the market price at the time of replacement.  The
price at such time may be more or less than the price at which the security was
sold by the Fund.  Until the security is replaced, the Fund is required to pay
to the lender amounts equal to any dividend which accrues during the period of
the loan.  To borrow the security, the Fund also may be required to pay a
premium, which would increase the cost of the security sold.  The proceeds of
the short sale will be retained by the broker, to the extent necessary to meet
margin requirements, until the short position is closed out.

Until the Fund replaces a borrowed security in connection with a short sale, the
Fund will: (a) maintain daily a segregated account, containing cash, cash
equivalents, or liquid marketable securities, at such a level that (i) the
amount deposited in the account plus the amount deposited with the broker as
collateral will equal the current value of the security sold short and (ii) the
amount deposited in the segregated account plus the amount deposited with the
broker as collateral will not be less than the market value of the security at
the time it was sold short; or (b) otherwise cover its short position in
accordance with positions taken by the Staff of the Securities and Exchange
Commission.

                                      -8-
<PAGE>
 
The Fund will incur a loss as a result of the short sale if the price of the
security increases between the date of the short sale and the date on which the
Fund replaces the borrowed security. The Fund will realize a gain if the
security declines in price between those dates.  This result is the opposite of
what one would expect from a cash purchase of a long position in a security.
The amount of any gain will be decreased, and the amount of any loss increased,
by the amount of any premium or amounts in lieu of interest the Fund may be
required to pay in connection with a short sale.  The Fund may purchase call
options to provide a hedge against an increase in the price of a security sold
short by the Fund.  See "Options and Futures Contracts" above.

The Fund anticipates that the frequency of short sales will vary substantially
in different periods, and they do not intend that any specified portion of their
assets, as a matter of practice, will be invested in short sales.  However, no
securities will be sold short if, after effect is given to any such short sale,
the total market value of all securities sold short would exceed 25% of the
value of the Fund's net assets.

In addition to the short sales discussed above, the Fund may make short sales
"against the box," a transaction in which the Fund enters into a short sale of a
security that the Fund owns.  The proceeds of the short sale will be held by a
broker until the settlement date at which time the Fund delivers the security to
close the short position.  The Fund receives the net proceeds from the short
sale.  It currently is anticipated that the Fund will make short sales against
the box for purposes of protecting the value of the Fund's net assets.

LENDING OF FUND SECURITIES.  The Fund may lend its portfolio securities to
financial institutions. Such loans would involve risks of delay in receiving
additional collateral in the event the value of the collateral decreases below
the value of the securities loaned or of delay in recovering the securities
loaned or even loss of rights in the collateral should the borrower of the
securities fail financially.  However, loans will be made only to borrowers
which Numeric deems to be of good standing and only when, in Numeric's judgment,
the income to be earned from the loans justifies the attendant risks.  The Fund
may not make loans in excess of 33% of the value of its total assets.

PORTFOLIO TURNOVER.   Numeric will effect portfolio transactions in the Fund
without regard to holding periods if, in its judgment, such transactions are
advisable in light of general market, economic or financial conditions.  The
annual portfolio turnover rate for the Fund is not expected to exceed 400%.
Portfolio turnover may vary greatly from year to year as well as within a
particular year.  High portfolio turnover rates (100% or more) will generally
result in higher transaction costs to the Fund and may result in the realization
of short-term capital gains that are taxable to shareholders as ordinary income.
The amount of portfolio activity will not be a limiting factor when making
portfolio decisions.  See the Statement of Additional Information, "Portfolio
Transactions" and "Taxes."

GENERAL CONSIDERATIONS FOR TAXABLE INVESTORS.  Investment strategies which
require periodic changes to portfolio holdings with the expectation of
outperforming equity indices are called "active" strategies.  These compare with
"passive" or "index" strategies which hold only the stocks in the equity
indices.  Passive strategies trade infrequently -- only as the indices change.

                                      -9-
<PAGE>
 
Most equity mutual funds pursue active strategies, which have higher turnover
than passive strategies.  The following describes the impact of portfolio
turnover on returns.
 
High portfolio turnover (100% or more) can adversely affect taxable investors,
especially those in higher marginal tax brackets, in two ways:  First, short
term capital gains, which are a by-product of high turnover investment
strategies, are currently taxed at rates comparable to ordinary income rates.
Ordinary income tax rates are higher than long term capital gain tax rates for
middle and upper income taxpayers.  Second, the frequent realization of gains,
which causes taxes to be paid frequently, is less advantageous than infrequent
realization of gains.  Infrequent realization of gains allows the payment of
taxes to be deferred to later years, allowing more of the gains to compound
before taxes are paid.  Consequently after-tax compound rates of return will
generally be higher for taxable investors using investment strategies with very
low turnover, all else being equal.
 
Although tax considerations should not typically drive an investment decision,
investors should consider their ability to allocate tax-deferred (such as IRAs
and 401(k) plans) versus taxable assets when considering where to invest.  All
else being equal, investors will earn better returns investing tax-deferred
assets in active strategies, while using lower turnover passive strategies for
taxable investments.

BORROWING MONEY.  As a fundamental policy, the Fund is permitted to borrow to
the extent permitted under the 1940 Act and to mortgage, pledge or hypothecate
its respective assets in connection with such borrowings in amounts not in
excess of 125% of the dollar amounts borrowed.  The 1940 Act permits an
investment company to borrow in an amount up to 33-1/3% of the value of such
company's total assets.  However, the Fund currently intends to borrow money
only for temporary or emergency (not leveraging) purposes, in an amount up to
15% of the value of its respective total assets (including the amount borrowed)
valued at the lesser of cost or market, less liabilities (not including the
amount borrowed) at the time the borrowing is made.  The Fund will not make any
investments while borrowings exceed 5% of its total assets.

DEBT SECURITIES.  The Fund may invest in debt securities rated no less than
investment grade by either Standard & Poor's Ratings Group ("S&P") or Moody's
Investors Service, Inc. ("Moody's"). Bonds in the lowest investment grade debt
category (e.g., bonds rated BBB by S&P or Baa by Moody's) have speculative
characteristics, and changes in economic conditions or other circumstances are
more likely to lead to a weakened capacity to make principal and interest
payments than is the case with higher grade bonds.  The Fund will not retain a
bond that was rated as investment grade at the time of purchase but whose rating
is subsequently downgraded below investment grade.  The value of debt securities
held by the Fund will tend to vary inversely in relation to changes in
prevailing interest rates.  Thus, if interest rates have increased from the time
a debt security was purchased, such security, if sold, might be sold at a price
less than its cost.  Conversely, if interest rates have declined from the time a
debt security was purchased, the debt security, if sold, might be sold at a
price greater than its cost.

SHORT-TERM DEBT OBLIGATIONS.  The Fund may purchase money market instruments to
the extent consistent with the investment objectives and policies.  Such
instruments include U.S. 

                                     -10-
<PAGE>
 
Government obligations, repurchase agreements, certificates of deposit, bankers
acceptances and commercial paper.

REPURCHASE AGREEMENTS.  The Fund may agree to purchase securities from financial
institutions subject to the seller's agreement to repurchase them at an agreed-
upon time and price ("repurchase agreements").  The financial institutions with
whom the Fund may enter into repurchase agreements will be banks and
broker/dealers which Numeric considers creditworthy pursuant to criteria
approved by the Board of Directors.  Numeric will consider, among other things,
whether a repurchase obligation of a seller involves minimal credit risk to the
Fund in determining whether to have the Fund enter into a repurchase agreement.
The seller under a repurchase agreement will be required to maintain the value
of the securities subject to the agreement at not less than the repurchase price
plus accrued interest.  Numeric will mark to market daily the value of the
securities and will, if necessary, require the seller to maintain additional
securities, to ensure that the value is not less than the repurchase price.
Default by or bankruptcy of the seller would, however, expose the Fund to a
possible loss because of adverse market action or delays in connection with the
disposition of the underlying obligations.

YEAR 2000.  The services provided to the Fund by Numeric and others depend in
large part upon the smooth functioning of their computer systems.  Many computer
software systems in use today cannot recognize the year 2000, but revert to 1900
or some other date, due to the manner in which dates were encoded or calculated.
PFPC, Numeric and the Fund's other service providers have advised RBB that they
have been reviewing all of their computer systems, are actively working on
necessary changes to those systems to prepare for the year 2000 and expect that,
given the extensive testing which they are undertaking, their systems will be
year 2000 compliant before that year.  There can, however, be no assurance that
PFPC, Numeric or any other service provider will be successful in achieving year
2000 compliance, or that interaction by Numeric or other service providers with
non-complying computer systems of other firms (such as broker-dealers or firms
that provide securities pricing information) will not impair services to the
Fund.

OTHER INVESTMENT INSTRUMENTS AND TECHNIQUES.  In addition to the above
investment instruments and techniques, the Fund presently intends to invest not
more than 5% of the Fund's net assets in when-issued and forward commitments,
illiquid securities, depositary receipts, investment company securities and
convertible securities.  These investment instruments and techniques and related
risks are described in greater detail in the Fund's Statement of Additional
Information under "Investment Objective and Policies."

The Fund's investment objective and policies described above may be changed by
RBB's Board of Directors without shareholder approval.  Shareholders will be
provided 30 days prior written notice of any change in the Fund's investment
objective.  There is no assurance that the investment objective of the Fund will
be achieved.

INVESTMENT LIMITATIONS

The Fund may not change the following investment limitations (with certain
exceptions, as noted below) without shareholder approval.  (A complete list of
the investment limitations that cannot 

                                     -11-
<PAGE>
 
be changed without such a vote of the shareholders is contained in the Statement
of Additional Information under "Investment Objective and Policies.")

THE FUND MAY NOT:

1.  Purchase the securities of any one issuer, other than securities issued or
guaranteed by the U.S. Government or its agencies or instrumentalities, if
immediately after and as a result of such purchase more than 5% of the value of
the Fund's total assets would be invested in the securities of such issuer, or
more than 10% of the outstanding voting securities of such issuer would be owned
by the Fund, except that up to 25% of the value of the Fund's total assets may
be invested without regard to such limitations.

2.  Borrow money, except to the extent permitted under the 1940 Act or mortgage,
pledge or hypothecate any of its assets in connection with any such borrowing
except in amounts not in excess of 125% of the dollar amounts borrowed.  For
purposes of this investment restriction, the entry into options, forward
contracts, futures contracts, including those relating to indexes, and options
on futures contracts or indexes shall not constitute borrowing.

3.  Purchase any securities which would cause, at the time of purchase, 25% or
more of the value of the total assets of the Fund to be invested in the
obligations of issuers in any industry, provided that there is no limitation
with respect to investments in U.S. Government obligations.

4.  Make loans, except that the Fund may purchase or hold debt obligations in
accordance with its investment objective, policies and limitations, may enter
into repurchase agreements for securities, and may lend portfolio securities
against collateral consisting of cash or securities which are consistent with
the Fund's permitted investments, which is equal at all times to at least 100%
of the value of the securities loaned.  There is no investment restriction on
the amount of securities that may be loaned, except that payments received on
such loans, including amounts received during the loan on account of interest on
the securities loaned, may not (together with all non-qualifying income) exceed
10% of the Fund's annual gross income (without offset for realized capital
gains) unless, in the opinion of counsel to RBB, such amounts are qualifying
income under federal income tax provisions applicable to regulated investment
companies.

If a percentage restriction under one of the Fund's investment policies or
restrictions or the use of assets is adhered to at the time a transaction is
effected, later changes in percentage resulting from changing values will not be
considered a violation (except with respect to any restrictions that may apply
to borrowings or senior securities issued by the Fund).

MANAGEMENT

BOARD OF DIRECTORS

The business and affairs of RBB and the Fund are managed under the direction of
RBB's Board of Directors.

                                     -12-
<PAGE>
 
INVESTMENT ADVISER

Numeric serves as investment adviser to the Fund.  Numeric, whose principal
business address is 1 Memorial Drive, Cambridge, Massachusetts 02142, was
organized in October 1989 as a Delaware limited partnership.  The firm, which
specializes in the active management of U.S. and international equity portfolios
using internally developed quantitative stock selection and portfolio risk-
control techniques, currently has over $3.7 billion in assets under management
for individuals, limited partnerships, mutual funds, offshore funds, pension
plans and endowment accounts.  Langdon B. Wheeler, CFA is the founder of
Numeric.  Mr. Wheeler received his MBA from Harvard University and an
undergraduate degree from Yale University.  All investment decisions with
respect to the Fund are made by a team of Numeric Investor's Portfolio
Management Department, which is subject to the supervision of John C. Bogle,
Jr., CFA and Mark F. Engerman, CFA.  No one person is responsible for making
recommendations to that team.  The general partner of Numeric is WBE &
Associates, LLC, a Delaware limited liability company.  The principal officers
of WBE & Associates, LLC are Messrs. Wheeler and Bogle.  Mr. Bogle received his
MBA and BS from Vanderbilt University.  Mr. Engerman received a BS in Applied
Mathematics and Economics from Brown University.

For the services provided and the expenses assumed by it, Numeric is entitled to
receive a fee from the Fund at an annual rate of 0.75% of the Fund's average
daily net assets, computed daily and payable monthly.  Numeric may from time to
time voluntarily agree to waive all or any portion of its advisory fee.  Numeric
presently intends to waive its fee for the current fiscal year and for the
following fiscal year to the extent necessary to maintain an annualized expense
ratio for the Fund of 1.00%, although there is no guarantee that Numeric will
maintain such waiver indefinitely.

CO-ADMINISTRATORS

Bear Stearns Funds Management Inc. ("BSFM"), an affiliate of Bear, Stearns & Co.
Inc. ("Bear Stearns"), serves as co-administrator to the Fund.  BSFM's principal
business address is 245 Park Avenue, 15th Floor, New York, New York 10167.  BSFM
generally assists the Fund in all aspects of its administration and operations.
For its services, BSFM is entitled to a monthly fee calculated at the annual
rate of .05% of the first $150 million of the Fund's average daily net assets
and .02% on all assets above $150 million.

PFPC Inc., an indirect wholly-owned subsidiary of PNC Bank, N.A. ("PNC"), also
serves as co-administrator to the Fund.  PFPC's principal business address is
Bellevue Corporate Center, 400 Bellevue Parkway, Wilmington, Delaware 19809.
PFPC assists the Fund in matters relating to the maintenance of financial
records and accounting.  For its services, PFPC is entitled to a fee calculated
at the annual rate of .125% of the Fund's average daily net assets.

ADMINISTRATIVE SERVICES AGENT

Provident Distributors, Inc. ("PDI"), with principal offices at Four Falls
Corporate Center, 6/th/ Floor, West Conshohocken, Pennsylvania 19428, provides
certain administrative services to the 

                                     -13-
<PAGE>
 
Funds not otherwise provided by BSFM or PFPC. PDI furnishes certain internal
quasi-legal, executive and administrative services to the Fund, acts as a
liaison between the Fund and its various services providers and coordinates and
assists in the preparation of proxy statements and reports prepared on behalf of
the Fund. For its services, PDI is entitled to a monthly fee calculated at the
annual rate of .15% of the Fund's average daily net assets.

TRANSFER AGENT AND DIVIDEND DISBURSING AGENT

PFPC serves as the Fund's transfer agent and dividend disbursing agent.  The
services provided and the fees payable by the Fund for these services are
described in the Statement of Additional Information under "Investment Advisory,
Distribution and Servicing Arrangements."

CUSTODIAN

Custodial Trust Company ("CTC"), an affiliate of Bear Stearns, serves as
custodian for the Fund. The services provided and the fees payable by the Fund
for these services are described in the Statement of Additional Information
under "Investment Advisory, Distribution and Servicing Arrangements."

DISTRIBUTOR

PDI acts as distributor for the Fund pursuant to a distribution agreement with
RBB on behalf of the Fund.

EXPENSES

The expenses of the Fund are deducted from its total income before dividends are
paid.  Any general expenses of RBB that are not readily identifiable as
belonging to a particular investment portfolio of RBB will be allocated among
all investment portfolios of RBB based upon the relative net assets of the
investment portfolios at the time such expenses are cited.

Numeric may assume additional expenses of the Fund from time to time.  In
certain circumstances, Numeric may assume such expenses on the condition that it
is reimbursed by the Fund for such amounts prior to the end of a fiscal year.
In such event, the reimbursement of such amounts will have the effect of
increasing the Fund's expense ratio and of decreasing the total return or yield
to investors.

FUND TRANSACTIONS

Numeric may consider a number of factors in determining which brokers to use in
purchasing or selling the Fund's securities.  These factors, which are more
fully discussed in the Statement of Additional Information, include, but are not
limited to, research services, the reasonableness of commissions and quality of
services and execution.  A higher rate of turnover (100% or more) of the Fund's
securities may involve correspondingly higher transaction costs, which will be
borne directly by the Fund.  The Fund may enter into brokerage transactions with
and pay brokerage 

                                     -14-
<PAGE>
 
commissions to brokers that are affiliated persons (as such term is defined in
the 1940 Act) provided that the terms of the brokerage transactions comply with
the provisions of the 1940 Act.

Numeric may allocate trades among any or all of its clients, including the Fund.
Numeric combines orders and allocates to each account its proportionate or "pro
rata" share of the trade.  Accounts included in the trade allocation may include
limited partnerships for which Numeric serves as general partner and in which
employees and/or partners of Numeric may own a substantial interest.  Numeric
may cause the Fund to pay brokerage commissions which may be in excess of the
lowest rates available to brokers who execute transactions for the Fund or who
otherwise provide brokerage and research services utilized by Numeric, provided
that Numeric determines in good faith that the amount of each such commission
paid to a broker is reasonable in relation to the value of the brokerage viewed
in terms of either the particular transaction to which the commission relates or
Numeric's overall responsibilities with respect to the Fund.

HOW TO PURCHASE SHARES

GENERAL

Shares representing interests in the Fund are offered continuously (subject to
closure of the Funds as described on page 19) for sale by the Distributor and
may be purchased without imposition of a sales charge through PFPC, the Fund's
transfer agent.  Shares may be purchased initially by completing the application
included in this Prospectus and forwarding the application and payment to PFPC.
Subsequent purchases of Shares may be effected by mailing a check or Federal
Reserve Draft payable to the order of "N/I NUMERIC INVESTORS family of funds" to
N/I NUMERIC INVESTORS family of funds, c/o PFPC, P.O. Box 8966, Wilmington,
Delaware 19899-8966.  The name of the Fund must also appear on the check or
Federal Reserve Draft.  Federal Reserve Drafts are available at national banks
or any state bank which is a member of the Federal Reserve System.  Initial
investments in the Fund must be at least $3,000 and subsequent investments must
be at least $100.  The minimum initial investment for an Automatic Investment
Plan is $1,000 with minimum monthly payments of $100.  RBB reserves the right to
reject any purchase order or to waive the minimum initial or subsequent
investment requirement.  Investors will be given notice of any increase in
minimum investment requirements.

Provided that the investment is at least $2,500, an investor may also purchase
Shares by having his bank or his broker wire Federal Funds to PFPC.  An
investor's bank or broker may impose a charge for this service.  The Fund does
not currently impose a sales charge for effecting wire transfers but reserve the
right to do so in the future.  In order to ensure prompt receipt of an
investor's Federal Funds wire, for an initial investment, it is important that
an investor follows these steps:

A.  Telephone the Fund's transfer agent, PFPC, toll-free at (800) 348-5031, and
provide your name, address, telephone number, Social Security or Tax
Identification Number, the name of the Fund, the amount being wired, and by
which bank or broker.  PFPC will then provide an investor with a Fund account
number.  Investors with existing accounts should also notify PFPC prior to
wiring funds.

                                     -15-
<PAGE>
 
B.   Instruct your bank or broker to wire the specified amount, together with
your assigned account number, to PFPC's account with PNC:

     PNC Bank, N.A.
     ABA-0310-0005-3
     CREDITING ACCOUNT NUMBER: 86-1108-2312
     FROM: (name of investor)
     ACCOUNT NUMBER: (investor's account number with the Fund)
     FOR PURCHASE OF: (name of the Fund)
     AMOUNT: (amount to be invested)

C.   Fully complete and sign the Application and mail it to the address shown
thereon.  PFPC will not process initial purchases until it receives a completed
and signed Application.

For subsequent investments, an investor should follow steps A and B above.

Shares of the Fund may be purchased on any Business Day.  A "Business Day" is
any day that the New York Stock Exchange (the "NYSE") is open for business.
Currently, the NYSE is closed on weekends and New Year's Day, Dr. Martin Luther
King, Jr. Day,  Presidents' Day, Good Friday, Memorial Day, Independence Day,
Labor Day, Thanksgiving Day and Christmas Day and the preceding Friday or
subsequent Monday when one of those holidays falls on a Saturday or Sunday.

The price paid for the Fund's Shares purchased initially or acquired through the
exercise of an exchange privilege is based on the net asset value next computed
after a purchase order is received in good order by PFPC, provided such order is
transmitted to and received by PFPC prior to the close of regular trading on the
NYSE (generally 4:00 p.m. Eastern Time) on such day.  Orders received by PFPC
after the close of regular trading on the NYSE are priced at the net asset value
next determined on the following Business Day.  In those cases where an investor
pays for Shares by check, the purchase will be effected at the net asset value
next determined after PFPC receives payment in good order.

Shareholders whose shares are held in a street name account and who desire to
transfer such shares to another street name account should contact the record
holder of their current street name account.

Some broker-dealers (other than the Distributor), financial institutions,
financial planners and other industry professionals ("Service Agents") may
impose certain conditions on their clients who invest in the Fund such as
initial and subsequent minimums and certain trading restrictions, which are in
addition to or different from those described in this Prospectus.  Service
Agents may impose transaction or administrative charges or other direct fees,
which charges and fees would not be imposed if Fund shares are purchased
directly from the Fund.  Therefore, a client or customer should contact the
organization acting on his behalf concerning the fees (if any) charged in
connection with a purchase or redemption of the Fund's shares and should read
this 

                                     -16-
<PAGE>
 
Prospectus in light of the terms governing his accounts with Service Agents.
Service Agents will be responsible for promptly transmitting client or customer
purchase and redemption orders to the Fund in accordance with their agreements
with clients or customers. Service Agents or, if applicable, their designees,
that have entered into agreements with the Fund or its agent may enter confirmed
purchase or redemption orders on behalf of clients and customers, with payment
to follow no later than the Fund's pricing on the following Business Day. If
payment is not received by such time, the Service Agent could be held liable for
resulting fees or losses. The Fund may be deemed to have received a purchase or
redemption order when a Service Agent, or, if applicable, its authorized
designee, accepts the order. Orders received by the Fund in proper form will be
priced at the Fund's net asset value next computed after they are accepted by
the Service Agent or its authorized designee.

AUTOMATIC INVESTMENT PLAN

Additional investments in Shares of the Fund may be made automatically by
authorizing PFPC to withdraw funds from your bank account through an Automatic
Investment Plan.  Investors desiring to participate in an Automatic Investment
Plan should call PFPC at (800) 348-5031 to obtain the appropriate forms, or
complete the appropriate section of the Application included with this
Prospectus.  The minimum initial investment for an Automatic Investment Plan is
$1,000, with minimum monthly payments of $100.

RETIREMENT PLANS

N/I NUMERIC INVESTORS family of funds Shares may be purchased in conjunction
with individual retirement accounts ("IRAs"), rollover IRAs, or pension, profit-
sharing or other employer benefit plans.  Contact PFPC for further information
as to applications and annual fees.  To determine whether the benefits of an IRA
are available and/or appropriate, a shareholder should consult with a tax
adviser.

EXCHANGE PRIVILEGE

The exchange privilege is available to shareholders residing in any state in
which the Shares of the Fund being exchanged for may be legally sold.  A
shareholder may exchange Shares of the Fund for Shares of any other N/I NUMERIC
INVESTORS Fund up to three (3) times per year (at least 30 days apart).  Such
exchange will be effected at the net asset value of the exchanged Fund and the
net asset value of the Fund to be acquired next determined after PFPC's receipt
of a request for an exchange.  In addition, RBB reserves the right to impose a
$5.00 administrative fee for each exchange.  An exchange of Shares will be
treated as a sale for federal income tax purposes.  See "Taxes."  A shareholder
wishing to make an exchange may do so by sending a written request to PFPC.

If the exchanging shareholder does not currently own Shares of the Fund whose
Shares are being acquired, a new account will be established with the same
registration, dividend and capital gain options as the account from which shares
are exchanged, unless otherwise specified in writing by the shareholder with all
signatures guaranteed.  A signature guarantee may be obtained from a 

                                     -17-
<PAGE>
 
domestic bank or trust company, broker, dealer, clearing agency or savings
association who are participants in a medallion program recognized by the
Securities Transfer Association. The three recognized medallion programs are
Securities Transfer Agents Medallion Program (STAMP), Stock Exchanges Medallion
Program (SEMP) and New York Stock Exchange, Inc. Medallion Signature Program
(MSP). Signature guarantees which are not a part of these programs will not be
accepted. The exchange privilege may be modified or terminated at any time, or
from time to time, by RBB, upon 60 days' written notice to shareholders.

If an exchange is to a new N/I NUMERIC INVESTORS family Fund, the dollar value
of Shares acquired must equal or exceed RBB's minimum for a new account; if to
an existing account, the dollar value must equal or exceed RBB's minimum for
subsequent investments.  If an amount remains in the N/I NUMERIC INVESTORS Fund
from which the exchange is being made that is below the minimum account value
required by RBB, the account will be subject to involuntary redemption.

PURCHASE AND EXCHANGE PRIVILEGE LIMITATIONS

The Fund's exchange privilege is not intended to afford shareholders a way to
speculate on short-term movements in the market.  Accordingly, in order to
prevent excessive use of the exchange privilege that may potentially disrupt the
management of the Fund and increase transaction costs, the Fund have established
a policy of limiting excessive exchange activity.

Shareholders are entitled to three (3) exchange redemptions (at least 30 days
apart) from the Fund during any twelve-month period.  Notwithstanding these
limitations, the Fund reserves the right to reject any purchase request
(including exchange purchases from other N/I NUMERIC INVESTORS Funds) that the
Adviser reasonably deems to be disruptive to efficient portfolio management.

TELEPHONE TRANSACTIONS

In order to request redemptions and exchanges by telephone, an investor must
have completed and returned an account application containing the appropriate
telephone election.  To add a telephone exchange feature to an existing account
that previously did not provide for this option, a Telephone Exchange
Authorization Form (available from PFPC) must be filed with PFPC.  Once this
election has been made, the shareholder may simply contact PFPC by telephone to
request the exchange by calling (800) 348-5031.  Neither RBB, the Fund, the
Distributor, the Co-Administrators, the Administrative Services Agent, the
transfer agent, nor any other Fund agent will be liable for any loss, liability,
cost or expense for following RBB's telephone transaction procedures described
below or for following instructions communicated by telephone that they
reasonably believe to be genuine.

RBB's telephone transaction procedures include the following measures:  (1)
requiring the appropriate telephone transaction privilege forms; (2) requiring
the caller to provide the names of the account owners, the account's federal tax
identification number and name of the Fund, all of which must match RBB's
records; (3) permitting exchanges only if the two account registrations 

                                     -18-
<PAGE>
 
are identical; (4) requiring that redemption proceeds be sent only by check to
the account owners of record at the address of record, or by wire only to the
owners of record at the bank account of record; (5) sending a written
confirmation for each telephone transaction to the owners of record at the
address of record within five (5) business days of the call; and (6) maintaining
tapes of telephone transactions for six months, if the Fund elects to record
shareholder telephone transactions.

For accounts held of record by Service Agents, additional documentation or
information regarding the scope of a caller's authority is required.  Finally,
for telephone transactions in accounts held jointly, additional information
regarding other account holders is required.  Telephone transactions will not be
permitted in connection with IRA or other retirement plan accounts or by an
attorney-in-fact under power of attorney.

CLOSING OF FUND

Numeric will monitor the Fund's total assets and may close the Fund at any time
to new investment or new accounts due to concerns that a significant increase in
the size of the Fund may adversely affect the implementation of Numeric's
investment strategy.  Numeric may also choose to reopen a closed Fund to new
investment at any time, and may subsequently close such Fund again should
concerns regarding Fund size recur.  Numeric reserves the right while the Fund
is closed to accept new investments from any of its employees or their spouses,
parents or children.

HOW TO REDEEM SHARES

REDEMPTION IN WRITING

Shareholders may redeem for cash some or all of their Fund Shares at any time.
To do so, a written request in proper form must be sent directly to The N/I
NUMERIC INVESTORS family of funds c/o PFPC, P.O. Box 8966, Wilmington, Delaware
19899-8966.  Shareholders may also place redemption requests through a Service
Agent, but such Service Agent might charge a fee for this service.

A request for redemption must be signed by all persons in whose names the Shares
are registered.  Signatures must conform exactly to the account registration.
If the proceeds of the redemption would exceed $10,000, or if the proceeds are
not to be paid to the record owner at the record address, or if the shareholder
is a corporation, partnership, trust or fiduciary, signature(s) must be
guaranteed according to the procedures described above under "How to Purchase
Shares -- Exchange Privilege."  A signature guarantee verifies the authenticity
of your signature.  You may call PFPC at (800) 348-5031 with respect to
questions about signature guarantees.

Generally, a properly signed written request with any required signature
guarantee is all that is required for a redemption.  In some cases, however,
other documents may be necessary.  Additional documentary evidence of authority
is also required by PFPC in the event redemption is requested by a corporation,
partnership, trust, fiduciary, executor or administrator.

                                     -19-
<PAGE>
 
REDEMPTION BY TELEPHONE

Investors may redeem shares without charge by telephone if they have checked the
appropriate box and supplied the necessary information on the Application, or
have filed a Telephone Authorization with PFPC.  An investor may obtain a
Telephone Authorization from PFPC by calling (800) 348-5031.  The proceeds will
be mailed by check to an investor's registered address unless he has designated
in his Application or Telephone Authorization that such proceeds are to be sent
by wire transfer to a specified checking or savings account.  If proceeds are to
be sent by wire transfer, a telephone redemption request received prior to the
close of regular trading on the NYSE will result in redemption proceeds being
wired to the investor's bank account on the next bank business day and the
redemption price will be the net asset value completed as of the close of
regular trading on the NYSE on that Business Day.  A redemption request received
after the close of regular trading on the NYSE will be priced at the net asset
value computed on the next Business Day.  All redemption requests must be in
good order before being processed.  The minimum redemption for proceeds sent by
wire transfer is $2,500.  There is no maximum for proceeds sent by wire
transfer.  The Fund may modify this redemption service at any time or charge a
service fee upon prior notice to shareholders.  No service fee is currently
contemplated, although RBB and PFPC reserve the right to refuse a telephone
redemption request if they deem it advisable to do so.  RBB's telephone
procedures are set forth under "How to Purchase Shares -- Telephone
Transactions" above.

OTHER INFORMATION ON REDEMPTIONS

The Fund is not responsible for the efficiency of the Federal Wire System or a
shareholder's investment adviser, broker-dealer or bank.  The shareholder is
responsible for any charges imposed by the shareholder's bank.  To change the
name of the single designated bank account to receive redemptions, it is
necessary to send a written request (with a signature guaranteed as set forth
above) to The N/I NUMERIC INVESTORS family of funds, c/o PFPC Inc., P. 0. Box
8966, Wilmington, Delaware 19899-8966.

INVOLUNTARY REDEMPTION

RBB reserves the right to redeem a shareholder's account in the Fund at any time
the net asset value of the account in the Fund falls below $500 as the result of
a redemption or an exchange request.  Shareholders will be notified in writing
that the value of their account in the Fund is less than $500 and will be
allowed 30 days to make additional investments before the redemption is
processed.

PAYMENT OF REDEMPTION PROCEEDS

In all cases, the redemption price is the net asset value per share next
determined after the request for redemption is received in proper form by PFPC.
Payment for Shares redeemed is made by check mailed within seven days after
acceptance by PFPC of the request and any other necessary documents in proper
order.  Such payment may be postponed or the right of redemption 

                                     -20-
<PAGE>
 
suspended as provided by the rules of the SEC. If the Shares to be redeemed have
been recently purchased by check, PFPC may delay mailing a redemption check,
which may be a period of up to 15 days, pending a determination that the check
has cleared.

REDEMPTION IN-KIND

The Fund reserves the right, if conditions exist which make cash payments
undesirable, to honor any request for redemption of the Fund's shares by making
payment in whole or in part in securities chosen by the Fund and valued in the
same way as they would be valued for purposes of computing the Fund's net asset
value.  If payment is made in securities, a shareholder may incur transaction
costs in converting these securities into cash after they have redeemed their
Shares.  The Fund has elected, however, to be governed by Rule 18f-1 under the
1940 Act, so that the Fund is obligated to redeem its Shares solely in cash up
to the lesser of $250,000 or 1% of its net asset value during any 90-day period
for any one shareholder of the Fund.

AUTOMATIC WITHDRAWAL

Automatic withdrawal permits investors to request withdrawal of a specified
dollar amount (minimum of $25) on either a monthly, quarterly or annual basis if
the investor has a $10,000 minimum account.  An application for automatic
withdrawal can be obtained from PFPC.  Automatic withdrawal may be ended at any
time by the investor, RBB or PFPC.  Purchases of additional shares concurrently
with withdrawals generally are undesirable.

NET ASSET VALUE

The net asset value of the Fund is calculated as of the close of regular trading
on the NYSE on each Business Day.  The net asset value for the Fund is
calculated by adding the value of all its securities, cash and other assets,
deducting its actual and accrued liabilities and dividing the result by the
number of outstanding Shares of the Fund.  The net asset value of the Fund is
calculated independently of each other N/I NUMERIC INVESTORS Fund.

Valuation of securities held by the Fund is as follows:  securities traded on a
national securities exchange or on the NASDAQ National Market System are valued
at the last reported sale price that day; securities traded on a national
securities exchange or on the NASDAQ National Market System for which there were
no sales on that day and securities traded on other over-the-counter markets for
which market quotations are readily available are valued at the mean of the bid
and asked prices; and securities for which market quotations are not readily
available are valued at fair market value as determined in good faith under
procedures established by RBB's Board of Directors.  The amortized cost method
of valuation may also be used with respect to debt obligations with sixty days
or less remaining to maturity.

With the approval of RBB's Board of Directors, the Fund may use a pricing
service, bank or broker-dealer experienced in such matters to value the Fund's
securities.  A more detailed discussion of net asset value and security
valuation is contained in the Statement of Additional Information.

                                     -21-
<PAGE>
 
DIVIDENDS AND DISTRIBUTIONS

The Fund will distribute substantially all of its net investment income and net
realized capital gains, if any, to the Fund's shareholders.  All distributions
are reinvested in the form of additional full and fractional Shares of the Fund
unless a shareholder elects otherwise.

The Fund expects to declare and pay dividends from net investment income
annually, generally near the end of the year.  Net realized capital gains
(including net short-term capital gains), if any, will be distributed at least
annually.

TAXES

     The following discussion is only a brief summary of some of the important
tax considerations generally affecting the Fund and its shareholders and is not
intended as a substitute for careful tax planning. Accordingly, investors in the
Fund should consult their tax advisers with specific reference to their own tax
situation.

     The Fund will elect to be taxed as a regulated investment company for
federal income tax purposes. So long as the Fund qualifies for this tax
treatment, it will be relieved of federal income tax on amounts distributed to
shareholders.

     Fund shareholders, unless otherwise exempt, will be taxed on Fund
distributions (except distributions that are treated for federal income tax
purposes as a return of capital) regardless of whether the distributions are
received in cash or reinvested in additional shares.  Distributions by the Fund
attributable to its "net capital gain" (the excess of its net long-term capital
gain - i.e., gains or assets held more than 12 months - over its net short-term
capital loss), if any, qualify as "capital gains distributions."  These
distributions are taxable to shareholders as long-term capital gain, regardless
of how long each shareholder has held shares.  For individuals, long-term
capital gain is generally subject to a maximum federal tax rate of 20%.

     RBB will send written notices to shareholders annually regarding the tax
status of distributions made by the Fund. Dividends declared in October,
November or December of any year payable to shareholders of record on a
specified date in such a month will be deemed to have been received by the
shareholders on December 31, if such dividends are paid during January of the
following year.

     Investors should be careful to consider the tax implications of buying
shares just prior to a distribution. The price of shares purchased at that time
will reflect the amount of the forthcoming distribution. Those investors
purchasing shares just prior to a distribution will nevertheless be taxed on the
entire amount of the distribution received, although the distribution is, in
effect, a return of capital.

     Shareholders who sell or redeem shares, or exchange shares representing
interests in one Fund for shares representing interests in another Fund, will
generally recognize capital gain or 

                                     -22-
<PAGE>
 
loss for federal income tax purposes. The gain or loss will be long-term capital
gain or loss if the shares have been held for more than 12 months, and short-
term otherwise, except that a loss on shares held six months or less will be
treated as long term capital loss to the extent of any capital gains
distributions received on the shares.

     Shareholders who are nonresident alien individuals, foreign trusts or
estates, foreign corporations or foreign partnerships are generally subject to
different U.S. federal income tax treatment from that described above.

DESCRIPTION OF SHARES

RBB has authorized capital of thirty billion shares of Common Stock, $.001 par
value per share, of which 18.326 billion shares are currently classified into 97
different classes of Common Stock (see "Description of Shares" in the Statement
of Additional Information).

Exchanges between the N/I NUMERIC INVESTORS family of funds and other families
of RBB are not permitted.  In addition, persons who are shareholders of the Fund
are not permitted to simultaneously acquire shares of the N/I NUMERIC INVESTORS
Growth Fund or N/I NUMERIC INVESTORS Micro Cap Fund by exchange.

THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION INCORPORATED HEREIN
RELATE PRIMARILY TO THE N/I NUMERIC INVESTORS SMALL CAP VALUE FUND AND DESCRIBE
ONLY THE INVESTMENT OBJECTIVE AND POLICIES, OPERATIONS, CONTRACTS AND OTHER
MATTERS RELATING TO THE N/I NUMERIC INVESTORS SMALL CAP VALUE FUND.

Each share that represents an interest in the Fund has an equal proportionate
interest in the assets belonging to the Fund with each other share that
represents an interest in such Fund, even where a share has a different class
designation than another share representing an interest in the Fund.  Shares of
RBB do not have preemptive or conversion rights.  When issued for payment as
described in this Prospectus, shares of RBB will be fully paid and non-
assessable.

RBB currently does not intend to hold annual meetings of shareholders except as
required by the 1940 Act or other applicable law.  The law under certain
circumstances provides shareholders with the right to call for a meeting of
shareholders to consider the removal of one or more directors.  To the extent
required by law, RBB will assist in shareholder communication in such matters.

Holders of shares of each of the N/I NUMERIC INVESTORS Funds will vote in the
aggregate and not by class on all matters, except where otherwise required by
law.  Further, shareholders of all investment portfolios of RBB will vote in the
aggregate and not by portfolio except as otherwise required by law or when the
Board of Directors determines that the matter to be voted upon affects only the
interests of the shareholders of a particular investment portfolio.  (See the
Statement of Additional Information under "Additional Information Concerning
Fund Shares" for examples when the 1940 Act requires voting by investment
portfolio or by class.)  

                                     -23-
<PAGE>
 
Shareholders of RBB are entitled to one vote for each full share held
(irrespective of class or portfolio) and fractional votes for fractional shares
held. Voting rights are not cumulative and, accordingly, the holders of more
than 50% of the aggregate shares of Common Stock of RBB may elect all of the
directors.

As of November 16, 1998, to RBB's knowledge, no person held of record or
beneficially 25% or more of the outstanding shares of all classes of RBB.

OTHER INFORMATION

REPORTS AND INQUIRIES

Shareholders will receive unaudited semi-annual reports describing the Fund's
investment operations and annual financial statements audited by independent
accountants.  Shareholder inquiries should be addressed to PFPC, Bellevue Park
Corporate Center, 400 Bellevue Parkway, Wilmington, Delaware 19809, toll-free
(800) 348-5031.

FUND PERFORMANCE INFORMATION

From time to time, the Fund may advertise its performance, including comparisons
to other mutual funds with similar investment objectives or to stock or other
relevant indices.  All such advertisements will show the average annual total
return over one, five and ten year periods or, if such periods have not yet
elapsed, shorter periods corresponding to the life of the Fund.  Such total
return quotations will be computed by finding the compounded average annual
total return for each time period that would equate the assumed initial
investment of $1,000 to the ending redeemable value, net of fees, according to a
required standardized calculation.  The standard calculation is required by the
SEC to provide consistency and comparability in investment company advertising.
The Fund may also from time to time include in such advertising an aggregate
total return figure or a total return figure that is not calculated according to
the standardized formula in order to compare more accurately the Fund's
performance with other measures of investment return.  For example, the Fund's
total return may be compared with data published by Lipper Analytical Services,
Inc., CDA Investment Technologies, Inc. or Weisenberger Investment Company
Service, or with the performance of the Standard & Poor's 500 Stock Index or the
Dow Jones Industrial Average, as well as the benchmark described in the Appendix
to this Prospectus.  Performance information may also include evaluation of the
Fund by nationally recognized ranking services and information as reported in
financial publications such as Barron's, Business Week, Forbes, Fortune, Money
Magazine, Mutual Fund Magazine, The New York Times, The Wall Street Journal, or
other national, regional or local publications.  All advertisements containing
performance data will include a legend disclosing that such performance data
represents past performance and that the investment return and principal value
of an investment will fluctuate so that an investor's Shares, when redeemed, may
be worth more or less than their original cost.

                                     -24-
<PAGE>
 
                                  APPENDIX A

                            PERFORMANCE BENCHMARKS

<TABLE>
<CAPTION>
N/I NUMERIC              PERFORMANCE
INVESTORS FUND            BENCHMARK                            DESCRIPTION
- -------------------------------------------------------------------------------------------
<S>                 <C>                    <C>
Small Cap Value     Russell 2000 Value     The Russell 2000 is an index of stocks 1001
                    Index                  through 3000 in the Russell 3000 Index as ranked
                                           by total market capitalization.  This index is
                                           segmented into growth and value categories.  The
                                           Russell 2000 Value Index contains stocks from the
                                           Russell 2000 with less than average growth
                                           orientation.  Companies in this index generally
                                           have low price to book and price/earnings ratios,
                                           higher dividend yields, and lower forecasted
                                           growth values.
- -------------------------------------------------------------------------------------------
</TABLE>

                                    App.A-1
<PAGE>
 
                     N/I NUMERIC INVESTORS family of funds
                           1-800-NUMERIC (686-3742)


                              ACCOUNT APPLICATION

Please Note: Do not use this form to open an individual retirement plan account
(such as an IRA). For an IRA application or help with this Application, please
call 1-800-NUMERIC (686-3742).

- --------------------------------------------------------------------------------
1.   ACCOUNT REGISTRATION:  (PLEASE CHECK THE APPROPRIATE BOX(ES) BELOW.)
- --------------------------------------------------------------------------------

     [_] Individual           [_] Joint Tenant


________________________________________________________________________________
NAME

________________________________________________________________________________
SOCIAL SECURITY NUMBER OF PRIMARY OWNER

________________________________________________________________________________
NAME OF JOINT OWNER (if applicable)

________________________________________________________________________________
JOINT OWNER SOCIAL SECURITY NUMBER


For joint accounts, the account registrants will be joint tenants with right of
survivorship and not tenants in common unless tenants in common or community
property registrations are requested.


GIFT TO MINOR (IF APPLICABLE):

[_]  UNIFORM GIFTS/TRANSFERS TO MINOR'S ACT


________________________________________________________________________________
NAME OF ADULT CUSTODIAN (ONLY ONE PERMITTED)

________________________________________________________________________________
NAME OF MINOR (ONLY ONE PERMITTED)
<PAGE>
 
________________________________________________________________________________
MINOR'S SOCIAL SECURITY NUMBER                                     DATE OF BIRTH


CORPORATION, PARTNERSHIP, TRUST OR OTHER ENTITY (IF APPLICABLE):

________________________________________________________________________________


________________________________________________________________________________
NAME OF CORPORATION, PARTNERSHIP, OR OTHER

________________________________________________________________________________
NAME(S) OF TRUSTEE(S)

________________________________________________________________________________
TAXPAYER IDENTIFICATION NUMBER

________________________________________________________________________________
TRUST DATE

- --------------------------------------------------------------------------------
2.  MAILING ADDRESS:
- --------------------------------------------------------------------------------


________________________________________________________________________________
STREET OR P.O. BOX                                              APARTMENT NUMBER

________________________________________________________________________________
CITY                               STATE                                ZIP  
CODE

(  )               (  )
- --------------------------------------------------------------------------------
DAY PHONE NUMBER                                       EVENING PHONE NUMBER


- --------------------------------------------------------------------------------
3.  INVESTMENT AMOUNT:
- --------------------------------------------------------------------------------

Minimum initial investment of $3,000 per Fund or $1,000 for an automatic
investment plan.
 
     [_]  N/I NUMERIC INVESTORS MICRO CAP                   $ CLOSED
                                                              ----------
 
     [_]  N/I NUMERIC INVESTORS GROWTH                      $ CLOSED
                                                              ----------
<PAGE>
 
     [_]  N/I NUMERIC INVESTORS GROWTH & VALUE              $_________

     [_]  N/I NUMERIC INVESTORS LARGER CAP VALUE            $_________

     [_]  N/I NUMERIC INVESTORS SMALL CAP VALUE             $_________

Make the check payable to N/I NUMERIC INVESTORS family of funds.


Shareholders may not purchase shares of the N/I NUMERIC INVESTORS Funds with a
check issued by a third party and endorsed over to the Funds.  Checks for
investment must be made payable to the N/I NUMERIC INVESTORS family of funds.


- --------------------------------------------------------------------------------
4.  DISTRIBUTION OPTIONS:
- --------------------------------------------------------------------------------

NOTE:  Dividends and capital gains may be reinvested or paid by check.  If no
options are selected below, both dividends and capital gains will be reinvested
in additional Fund shares.

DIVIDENDS           [_]  Pay by check         [_] Reinvest
CAPITAL GAINS       [_]  Pay by check         [_] Reinvest


Please check one of the following options:

[_]  Please mail checks to Address of Record
        (Named in Section 2)

[_]  Please electronically credit my Bank of Record
        (Named in Section 8)

- --------------------------------------------------------------------------------
5.   TELEPHONE EXCHANGE AND REDEMPTION:
- --------------------------------------------------------------------------------

To use either or both of these options, you must initial the appropriate line
below.

I authorize the Transfer Agent to accept instructions from any person to
exchange shares in my account(s) by telephone in accordance with the procedures
and conditions set forth in the Fund's current prospectus.


                              Exchange shares for shares of another N/I
- ---------  -------------
initial    joint initial      NUMERIC INVESTORS Fund.
<PAGE>
 
                              Redeem shares, and send the proceeds to the
- ---------  -------------
initial    joint initial      address of record.


- --------------------------------------------------------------------------------
6.  AUTOMATIC INVESTMENT PLAN (IF APPLICABLE):
- --------------------------------------------------------------------------------

Please attach an unsigned, voided check.

The Automatic Investment Plan ($1,000 minimum initial investment), makes
possible regularly scheduled purchases of Fund shares.  The Fund's Transfer
Agent can arrange for an amount of money selected by you ($100 minimum to be
deducted from your checking account and used to purchase shares of a specified
N/I NUMERIC INVESTORS Fund.

Please debit $______ from my checking account (named below) on or about the 20th
of every month.


$ ________ into the __________ Fund __________ Start Month.
$100 minimum


$ ________ into the __________ Fund __________ Start Month.
$100 minimum

$ ________ into the __________ Fund __________ Start Month.
$100 minimum


$ ________ into the __________ Fund __________ Start Month.
$100 minimum


$ ________ into the __________ Fund __________ Start Month.
$100 minimum

- --------------------------------------------------------------------------------
7.  SYSTEMATIC WITHDRAWAL PLAN (IF APPLICABLE):
- --------------------------------------------------------------------------------

Please attach an unsigned, voided check.

To select this option please fill out the information below:

Fund Name ___________________   Amount ______________________
<PAGE>
 
Startup Month __________________________

Frequency Options:   [_] Annually   [_] Monthly   [_] Quarterly


 .    A minimum account value of $10,000 in a single account is required to
     establish a Systematic Withdrawal Plan
 .    Payments will be made on or near the 25th of the month
     Complete only if using Automatic Investment Plan or Systematic Withdrawal
     Plan

- --------------------------------------------------------------------------------
8.  BANK OF RECORD:
- --------------------------------------------------------------------------------

Complete only if using Automatic Investment Plan (Section 6) or Systematic
Withdrawal Plan (Section 7)


________________________________________________________________________________
BANK NAME

________________________________________________________________________________
STREET ADDRESS OR P.O. BOX

________________________________________________________________________________
CITY                                STATE                             ZIP CODE

________________________________________________________________________________
BANK ABA NUMBER                                        BANK ACCOUNT NUMBER


- --------------------------------------------------------------------------------
9.  SIGNATURES:
- --------------------------------------------------------------------------------

The undersigned warrants that I (we) have full authority and, if a natural
person, I (we) am (are) of legal age to purchase shares pursuant to this Account
Information Form, and I (we) have received a current prospectus for the N/I
NUMERIC INVESTORS Fund(s) in which I (we) am (are) investing.

Under the Interest and Dividend Tax Compliance Act of 1983, the Fund is required
to have the following certification:

UNDER PENALTIES OF PERJURY, I CERTIFY THAT:
(1)  THE NUMBER SHOWN ON THIS FORM IS MY CORRECT TAXPAYER IDENTIFICATION NUMBER
(OR I AM WAITING FOR A NUMBER TO BE ISSUED TO ME), AND
(2)  I AM NOT SUBJECT TO BACKUP WITHHOLDING BECAUSE (A) I AM EXEMPT FROM BACKUP
WITHHOLDING, OR (B) I HAVE NOT BEEN NOTIFIED BY THE INTERNAL REVENUE SERVICE
THAT I AM SUBJECT
<PAGE>
 
TO 31% BACKUP WITHHOLDING AS A RESULT OF A FAILURE TO REPORT ALL INTEREST OR
DIVIDENDS, OR (C) THE IRS HAS NOTIFIED ME THAT I AM NO LONGER SUBJECT TO BACKUP
WITHHOLDING.

NOTE:  YOU MUST CROSS OUT ITEM (2) ABOVE IF YOU HAVE BEEN NOTIFIED BY THE IRS
THAT YOU ARE CURRENTLY SUBJECT TO BACKUP WITHHOLDING BECAUSE YOU HAVE FAILED TO
REPORT ALL INTEREST AND DIVIDENDS ON YOUR TAX RETURN.  THE INTERNAL REVENUE
SERVICE DOES NOT REQUIRE YOUR CONSENT TO ANY PROVISION OF THIS DOCUMENT OTHER
THAN THE CERTIFICATION REQUIRED TO AUDIT BACKUP WITHHOLDING.

________________________________________________________________________________
SIGNATURE OF APPLICANT                                                     DATE

________________________________________________________________________________
PRINT NAME                                                 TITLE (IF APPLICABLE)

________________________________________________________________________________
SIGNATURE OF JOINT OWNER                                                    DATE

________________________________________________________________________________
PRINT NAME                                                 TITLE (IF APPLICABLE)


(If you are signing for a corporation, you must indicate corporate office or
title. If you wish additional signatories on the account, please include a
corporate resolution. If signing as a fiduciary, you must indicate capacity.)

For information on additional options, such as IRA Applications, rollover
requests for qualified retirement plans, or for wire instructions, please call
us at 1-800-NUMERIC (686-3742).  For information on new or existing accounts
call 1-800-348-5031.

MAIL COMPLETED ACCOUNT APPLICATION AND CHECK TO:
          N/I NUMERIC INVESTORS FAMILY OF FUNDS
          C/O PFPC INC.
          P.O. BOX 8966
          WILMINGTON, DE 19899-8966

                     N/I NUMERIC INVESTORS FAMILY OF FUNDS
                            1-800-NUMERIC [686-3742]
                            HTTP://WWW.NUMERIC.COM
<PAGE>
 
INVESTMENT ADVISER
     Numeric Investors L.P.
     One Memorial Drive
     Cambridge, MA 02142

CUSTODIAN
     Custodial Trust Company
     101 Carnegie Center
     Princeton, NJ 05840

CO-ADMINISTRATOR, TRANSFER AGENT
 AND DIVIDEND DISBURSING AGENT
     PFPC Inc.
     Bellevue Corporate Center
     400 Bellevue Parkway
     Wilmington, DE 19809

CO-ADMINISTRATOR
     Bear Stearns Funds Management Inc.
     245 Park Avenue, 15th floor
     New York, NY 10167

ADMINISTRATIVE SERVICES AGENT AND DISTRIBUTOR
     Provident Distributors, Inc.
     Four Falls Corporate Center, 6/th/ Floor
     West Conshohocken, Pennsylvania  19428

COUNSEL
     Drinker Biddle & Reath LLP
     1345 Chestnut Street
     Philadelphia, PA 19107-3496

INDEPENDENT ACCOUNTANTS
     PricewaterhouseCoopers LLP
     2400 Eleven Penn Center
     Philadelphia, PA 19103
<PAGE>
 
                  N/I NUMERIC INVESTORS Small Cap Value Fund

                 (Investment Portfolio of The RBB Fund, Inc.)


                      STATEMENT OF ADDITIONAL INFORMATION

    This Statement of Additional Information provides supplementary information
pertaining to shares of the class (the "Shares") representing interests in the
N/I NUMERIC INVESTORS Small Cap Value Fund (the "Fund"), of The RBB Fund, Inc.
("RBB").  This Statement of Additional Information is not a prospectus and
should be read only in conjunction with the Fund's Prospectus dated December 1,
1998 (the "Prospectus").  A copy of the Prospectus may be obtained from Numeric
by calling toll-free (800) NUMERIC [(800) 686-3742]. This Statement of
Additional Information is dated December 1, 1998.

<TABLE>
<CAPTION>
                                                   Page
                                                   ----
<S>                                                <C>
General..........................................     2
Investment Objective And Policies................     2
Investment Limitations...........................    12
Directors And Officers...........................    13
Investment Advisory, Distribution And Servicing
     Arrangements................................    17
Fund Transactions................................    20
Purchase And Redemption Information..............    21
Valuation Of Shares..............................    22
Performance Information..........................    23
Taxes............................................    25
Description Of Shares............................    28
Additional Information Concerning Fund Shares....    30
Miscellaneous....................................    31
Appendix A.......................................   A-1
</TABLE>

NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS NOT CONTAINED IN THIS STATEMENT OF ADDITIONAL INFORMATION IN
CONNECTION WITH THE OFFERING MADE BY THE PROSPECTUS AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED
BY RBB OR ITS DISTRIBUTOR.  THE STATEMENT OF ADDITIONAL INFORMATION DOES NOT
CONSTITUTE AN OFFERING BY RBB OR BY THE DISTRIBUTOR IN ANY JURISDICTION IN WHICH
SUCH OFFERING MAY NOT LAWFULLY BE MADE.
<PAGE>
 
                                 GENERAL

     RBB is an open-end management investment company currently operating or
proposing to operate seventeen separate investment portfolios.  RBB is
registered as an open-end investment company under the Investment Company Act of
1940 (the "1940 Act") and was organized as a Maryland corporation on February
29, 1988. This Statement of Additional Information pertains to Shares
representing interests in the Fund offered by the Prospectus dated December 1,
1998.

     Capitalized terms used herein and not otherwise defined have the same
meanings as are given to them in the Prospectus.


                       INVESTMENT OBJECTIVE AND POLICIES

     The following supplements the information contained in the Prospectus
concerning the investment objective and policies of the Funds.

FUTURES

     Futures Contracts. When the Fund purchases a futures contract, it agrees to
purchase a specified underlying instrument at a specified future date. When the
Fund sells a futures contract, it agrees to sell the underlying instrument at a
specified future date. The price at which the purchase and sale will take place
is fixed when the Fund enters into the contract. The underlying instrument may
be a specified type of security, such as U.S. Treasury bonds or notes.

     The majority of futures contracts are closed out by entering into an
offsetting purchase or sale transaction in the same contract on the exchange
where they are traded, rather than being held for the life of the contract.
Futures contracts are closed out at their current prices, which may result in a
gain or loss.

     If the Fund holds a futures contract until the delivery date, it will be
required to complete the purchase and sale contemplated by the contract.  In the
case of futures contracts on securities, the purchaser generally must deliver
the agreed-upon purchase price in cash, and the seller must deliver securities
that meet the specified characteristics of the contract.

     The Fund may purchase futures contracts as an alternative to purchasing
actual securities. For example, if the Fund intended to purchase bonds but had
not yet done so, it could purchase a futures contract in order to lock in
current bond prices while deciding on particular investments. This strategy is
sometimes known as an anticipatory hedge. Alternatively, the Fund could purchase
a futures contract if it had cash and short-term securities on hand that it
wished to invest in longer-term securities, but at the same time the Fund wished
to maintain a highly liquid position in order to be prepared to meet redemption
requests or other obligations. In these 

                                      -2-
<PAGE>
 
strategies the Fund would use futures contracts to attempt to achieve an overall
return --whether positive or negative -- similar to the return from longer-term
securities, while taking advantage of potentially greater liquidity that futures
contracts may offer. Although the Fund would hold cash and liquid debt
securities in a segregated account with a value sufficient to cover its open
futures obligations, the segregated assets would be available to the Fund
immediately upon closing out the futures position, while settlement of
securities transactions can take several days. However, because the Fund's cash
that would otherwise have been invested in higher-yielding bonds would be held
uninvested or invested in short-term securities so long as the futures position
remains open, the Fund's return would involve a smaller amount of interest
income and potentially a greater amount of capital gain or loss.

    The Fund may sell futures contracts to hedge its other investments against
changes in value, or as an alternative to sales of securities.  For example, if
the investment adviser anticipated a decline in bond prices, but did not wish to
sell bonds owned by the Fund, it could sell a futures contract in order to lock
in a current sale price.  If prices subsequently fell, the future contract's
value would be expected to rise and offset all or a portion of the loss in the
bonds that the Fund had hedged.  Of course, if prices subsequently rose, the
futures contract's value could be expected to fall and offset all or a portion
of the benefit of the Fund.  In this type of strategy, the Fund's return will
tend to involve a larger component of interest income, because the Fund will
remain invested in longer-term securities rather than selling them and investing
the proceeds in short-term securities which generally provide lower yields.

    Futures margin payments. The purchaser or seller of a futures contract is
not required to deliver or pay for the underlying instrument unless the contract
is held until the delivery date. However, both the purchaser and seller are
required to deposit "initial margin" with a futures broker (known as a futures
commission merchant, or FCM), when the contract is entered into. Initial margin
deposits are equal to a percentage of the contract's value, as set by the
exchange where the contract is traded, and may be maintained in cash or high
quality liquid securities. If the value of either party's position declines,
that party will be required to make additional "variation margin" payments to
settle the change in value on a daily basis. The party that has a gain may be
entitled to receive all or a portion of this amount. Initial and variation
margin payments are similar to good faith deposits or performance bonds, unlike
margin extended by a securities broker, and initial and variation margin
payments do not constitute purchasing securities on margin for purposes of the
Fund's investment limitations. In the event of the bankruptcy of an FCM that
holds margin on behalf of the Fund, the Fund may be entitled to a return of
margin owed to it only in proportion to the amount received by the FCM's other
customers. The investment adviser will attempt to minimize this risk by careful
monitoring of the creditworthiness of the FCMs with which the Fund does
business.

    Correlation of price changes.  The prices of futures contracts depend
primarily on the value of their underlying instruments.  Because there are a
limited number of types of futures contracts, it is likely that the standardized
futures contracts available to the Fund will not match the Fund's current or
anticipated investments.  Futures prices can also diverge from the prices of
their underlying instruments, even if the underlying instruments match the
Fund's investments well. Futures prices are affected by such factors as current
and anticipated short-term interest rates, changes in volatility of the
underlying instrument, and the time remaining until expiration

                                      -3-
<PAGE>
 
of the contract, which may not affect security prices the same way. Imperfect
correlation between the Fund's investments and its futures positions may also
result from differing levels of demand in the futures markets and the securities
markets, from structural differences in how futures and securities are traded,
or from imposition of daily price fluctuation limits for futures contracts. The
Fund may purchase or sell futures contracts with a greater or lesser value than
the securities they wish to hedge or intend to purchase in order to attempt to
compensate for differences in historical volatility between the futures contract
and the securities, although this may not be successful in all cases. If price
changes in the Fund's futures positions are poorly correlated with its other
investments, its futures positions may fail to produce anticipated gains or
result in losses that are not offset by the gains in the Fund's other
investments.

    Liquidity of futures contracts.  Because futures contracts are generally
settled within a day from the date they are closed out, compared with a
settlement period of seven days for some types of securities, the futures
markets can provide liquidity superior to the securities markets in many cases.
Nevertheless, there is no assurance a liquid secondary market will exist for any
particular futures contract at any particular time.  In addition, futures
exchanges may establish daily price fluctuation limits for futures contracts and
may halt trading if a contract's price moves upward or downward more than the
limit in a given day.  On volatile trading days when the price fluctuation limit
is reached, it may be impossible for the Fund to enter into new positions or
close out existing positions.  If the secondary market for a futures contract is
not liquid because of price fluctuation limits or otherwise, it would prevent
prompt liquidation of unfavorable futures positions, and potentially could
require the Fund to continue to hold a futures position until the delivery date
regardless of changes in its value. As a result, the Fund's access to other
assets held to cover its futures positions could also be impaired.

PUT AND CALL OPTIONS

    Purchasing Put Options.  By purchasing a put option, the Fund obtains the
right (but not the obligation) to sell the option's underlying instrument at a
fixed strike price.  The option may give the Fund the right to sell only on the
option's expiration date, or may be exercisable at any time up to and including
that date.  In return for this right, the Fund pays the current market price for
the option (known as the option premium).  The option's underlying instrument
may be a security or a futures contract.

    The Fund may terminate its position in a put option it has purchased by
allowing it to expire or by exercising the option.  If the option is allowed to
expire, the Fund will lose the entire premium it paid.  If the Fund exercises
the option, it completes the sale of the underlying instrument at the strike
price.  If the Fund exercises a put option on a futures contract, it assumes a
seller's position in the underlying futures contract.  Purchasing an option on a
futures contract does not require the Fund to make futures margin payments
unless it exercises the option.  The Fund may also terminate a put option
position by closing it out in the secondary market at its current price, if a
liquid secondary market exists.

    Put options may be used by the Fund to hedge securities it owns, in a manner
similar to selling futures contracts, by locking in a minimum price at which the
Fund can sell.  If security prices fall, the value of the put option would be
expected to rise and offset all or a portion of the 

                                      -4-
<PAGE>
 
Fund's resulting losses. The put thus acts as a hedge against a fall in the
price of such securities. However, all other things being equal (including
securities prices) option premiums tend to decrease over time as the expiration
date nears. Therefore, because of the cost of the option in the form of the
premium (and transaction costs), the Fund would expect to suffer a loss in the
put option if prices do not decline sufficiently to offset the deterioration in
the value of the option premium. This potential loss represents the cost of the
hedge against a fall in prices. At the same time, because the maximum the Fund
has at risk is the cost of the option, purchasing put options does not eliminate
the potential for the Fund to profit from an increase in the value of the
securities hedged to the same extent as selling a futures contract.

   Purchasing Call Options.  The features of call options are essentially the
same as those of put options, except that the purchaser of a call option obtains
the right to purchase, rather than sell, the underlying instrument at the
option's strike price (call options on futures contracts are settled by
purchasing the underlying futures contract).  By purchasing a call option, the
Fund would attempt to participate in potential price increases of the underlying
instrument, with results similar to those obtainable from purchasing a futures
contract, but with risk limited to the cost of the option if security prices
fell.  At the same time, the Fund can expect to suffer a loss if security prices
do not rise sufficiently to offset the cost of the option.

   The Fund will purchase call options only in connection with "closing purchase
transactions."  The Fund may terminate its position in a call option by entering
into a closing purchase transaction.  A closing purchase transaction is the
purchase of a call option on the same security with the same exercise price and
call period as the option previously written by the Fund.  If the Fund is unable
to enter into a closing purchase transaction, the Fund may be required to hold a
security that it might otherwise have sold to protect against depreciation.

   Writing Put Options. When the Fund writes a put option, it takes the opposite
side of the transaction from the option's purchaser. In return for receipt of
the premium, the Fund assumes the obligation to pay the strike price for the
option's underlying instrument if the other party to the option chooses to
exercise it. When writing an option on a futures contract the Fund will be
required to make margin payments to an FCM as described above for futures
contracts. The Fund may seek to terminate its position in a put option it writes
before exercise by closing out the option in the secondary market at its current
price. If the secondary market is not liquid for an option the Fund has written,
however, the Fund must continue to be prepared to pay the strike price while the
option is outstanding, regardless of price changes, and must continue to set
aside assets to cover its position.

   The Fund may write put options as an alternative to purchasing actual
securities.  If security prices rise, the Fund would expect to profit from a
written put option, although its gain would be limited to the amount of the
premium it received.  If security prices remain the same over time, it is likely
that the Fund will also profit, because it should be able to close out the
option at a lower price.  If security prices fall, the Fund would expect to
suffer a loss. This loss should be less than the loss the Fund would have
experienced from purchasing the underlying instrument directly, however, because
the premium received for writing the option should mitigate the effects of the
decline. As with other futures and options strategies used as alternatives for
purchasing securities, the Fund's return from writing put options generally will

                                      -5-
<PAGE>
 
involve a smaller amount of interest income than purchasing longer-term
securities directly, because the Fund's cash will be invested in shorter-term
securities which usually offer lower yields.

    Writing Call Options.  Writing a call option obligates the Fund to sell or
deliver the option's underlying instrument, in return for the strike price, upon
exercise of the option.  The characteristics of writing call options are similar
to those of writing put options, as described above, except that writing covered
call options generally is a profitable strategy if prices remain the same or
fall.  Through receipt of the option premium, a Fund would seek to mitigate the
effects of a price decline.  At the same time, because a Fund would have to be
prepared to deliver the underlying instrument in return for the strike price,
even if its current value is greater, the Fund would give up some ability to
participate in security price increases when writing call options.

    Combined Option Positions.  The Fund may purchase and write options in
combination with each other to adjust the risk and return characteristics of the
overall position.  For example, the Fund may purchase a put option and write a
call option on the same underlying instrument, in order to construct a combined
position whose risk and return characteristics are similar to selling a futures
contract.  Another possible combined position would involve writing a call
option at one strike price and buying a call option at a lower price, in order
to reduce the risk of the written call option in the event of a substantial
price increase.  Because combined options positions involve multiple trades,
they result in higher transaction costs and may be more difficult to open and
close out.

    Risks of Options Transactions. Options are subject to risks similar to those
described above with respect to futures contracts, including the risk of
imperfect correlation between the option and the Fund's other investments and
the risk that there might not be a liquid secondary market for the option. In
the case of options on futures contracts, there is also a risk of imperfect
correlation between the option and the underlying futures contract. Options are
also subject to the risks of an illiquid secondary market, particularly in
strategies involving writing options, which the Fund cannot terminate by
exercise. In general, options whose strike prices are close to their underlying
instruments' current value will have the highest trading volume, while options
whose strike prices are further away may be less liquid. The liquidity of
options may also be affected if options exchanges impose trading halts,
particularly when markets are volatile.

    Asset Coverage for Futures and Options Positions.  The Fund will not use
leverage in its options and futures strategies.  The Fund will hold securities
or other options or futures positions whose values are expected to offset its
obligations under the hedge strategies.  The Fund will not enter into an option
or futures position that exposes the Fund to an obligation to another party
unless it owns either (i) an offsetting position in securities or other options
or futures contracts or (ii) cash, receivables and short-term debt securities
with a value sufficient to cover its potential obligations.  The Fund will
comply with guidelines established by the SEC with respect to
coverage of options and futures strategies by mutual funds, and if the
guidelines so require will set aside cash and high grade liquid debt securities
in a segregated account with its custodian bank in the amount prescribed.
Securities held in a segregated account cannot be sold while the futures or
option strategy is outstanding, unless they are replaced with similar
securities.  As a 

                                      -6-
<PAGE>
 
result, there is a possibility that segregation of a large percentage of the
Fund's assets could impede portfolio management or the Fund's ability to meet
redemption requests or other current obligations.

    Limitations on Futures and Options Transactions. RBB, on behalf of the
Funds, has filed a notice of eligibility for exclusion from the definition of
the term "commodity pool operator" with the Commodity Futures Trading Commission
("CFTC") and the National Futures Association, which regulate trading in the
futures markets. Pursuant to Section 4.5 of the regulations under the Commodity
Exchange Act, the Fund will not enter into any commodity futures contract or
option on a commodity futures contract for non-hedging purposes if, as a result,
the sum of initial margin deposits on commodity futures contracts and related
commodity options and premiums paid for options on commodity futures contracts
the Fund has purchased would exceed 5% of the Fund's net assets after taking
into account unrealized profits and losses on such contracts.

    The Fund's limitations on investments in futures contracts and their
policies regarding futures contracts and the limitations on investments in
options and its policies regarding options discussed above in this Statement of
Additional Information are not fundamental policies and may be changed as
regulatory agencies permit. The Fund will not modify the above limitations to
increase its permissible futures and options activities without supplying
additional information in a current Prospectus or Statement of Additional
Information that has been distributed or made available to the Fund's
shareholders.

SHORT SALES "AGAINST THE BOX"

    In a short sale, the Fund sells a borrowed security and has a corresponding
obligation to the lender to return the identical security.  The Fund may engage
in short sales if at the time of the short sale it owns or has the right to
obtain, at no additional cost, an equal amount of the security being sold short.
This investment technique is known as a short sale "against the box."  In a
short sale, a seller does not immediately deliver the securities sold and is
said to have a short position in those securities until delivery occurs.  If the
Fund engages in a short sale, the collateral for the short position will be
maintained by the Fund's custodian or a qualified sub-custodian.  While the
short sale is open, the Fund will maintain in a segregated account an amount of
securities equal in kind and amount to the securities sold short or securities
convertible into or exchangeable for such equivalent securities.  These
securities constitute the Fund's long position.  The Fund will not engage in
short sales against the box for speculative purposes.  The Fund may, however,
make a short sale as a hedge, when it believes that the price of a security may
decline, causing a decline in the value of a security owned by the Fund (or a
security convertible or exchangeable for such security), or when the Fund wants
to sell the security at an attractive current price, but also wishes possibly to
defer recognition of gain or loss for federal income tax purposes.  (A short
sale against the box will defer recognition of gain for federal income tax
purposes only if the Portfolio subsequently closes the short position by making
a purchase of the relevant securities no later than
30 days after the end of the taxable year.)  In such case, any future losses in
the Fund's long position should be reduced by a gain in the short position.
Conversely, any gain in the long position should be reduced by a loss in the
short position.  The extent to which such gains or losses are reduced will
depend upon the 

                                      -7-
<PAGE>
 
amount of the security sold short relative to the amount the Fund owns. There
will be certain additional transaction costs associated with short sales against
the box, but the Fund will endeavor to offset these costs with the income from
the investment of the cash proceeds of short sales.

SECTION 4(2) PAPER

    "Section 4(2) paper" is commercial paper which is issued in reliance on the
"private placement" exemption from registration which is afforded by Section
4(2) of the Securities Act of 1933.  Section 4(2) paper is restricted as to
disposition under the federal securities laws and is generally sold to
institutional investors such as the Fund which agrees that it is purchasing the
paper for investment and not with a view to public distribution.  Any resale by
the purchaser must be in an exempt transaction.  Section 4(2) paper normally is
resold to other institutional investors through or with the assistance of
investment dealers who make a market in the Section 4(2) paper, thereby
providing liquidity.  See "Illiquid Securities" below and Appendix "A" for a
list of commercial paper ratings.

RIGHTS OFFERINGS AND PURCHASE WARRANTS

    Rights offerings and purchase warrants are privileges issued by a
corporation which enable the owner to subscribe to and purchase a specified
number of shares of the corporation at a specified price during a specified
period of time. Subscription rights normally have a short lifespan to
expiration. The purchase of rights or warrants involves the risk that the Fund
could lose the purchase value of a right or warrant if the right to subscribe to
additional shares is not executed prior to the rights and warrants expiration.
Also, the purchase of rights and/or warrants involves the risk that the
effective price paid for the right and/or warrant added to the subscription
price of the related security may exceed the value of the subscribed security's
market price such as when there is no movement in the level of the underlying
security.

ILLIQUID SECURITIES

    The Fund may not invest more than 15% of its net assets in illiquid
securities, including repurchase agreements which have a maturity of longer than
seven days and securities that are illiquid by virtue of the absence of a
readily available market or legal or contractual restrictions on resale.
Securities that have legal or contractual restrictions on resale but have a
readily available market are not considered illiquid for purposes of this
limitation. Repurchase agreements subject to demand are deemed to have a
maturity equal to the notice period.

    Mutual funds do not typically hold a significant amount of 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.

                                      -8-
<PAGE>
 
    The Fund may purchase securities which are not registered under the
Securities Act but which may be sold to "qualified institutional buyers" in
accordance with Rule 144A under the Securities Act. These securities will not be
considered illiquid so long as it is determined by the Fund's adviser that an
adequate trading market exists for the securities. This investment practice
could have the effect of increasing the level of illiquidity in the Fund during
any period that qualified institutional buyers become uninterested in purchasing
restricted securities.

    The Adviser will monitor the liquidity of restricted securities in the Fund
under the supervision of the Board of Directors.  In reaching liquidity
decisions, the Adviser may consider, among others, the following factors:  (1)
the unregistered nature of the security; (2) the frequency of trades and quotes
for the security; (3) the number of dealers wishing to purchase or sell the
security and the number of other potential purchasers; (4) dealer undertakings
to make a market in the security and (5) 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).

DEPOSITARY RECEIPTS

    The Fund's assets may be invested in the securities of foreign issuers in
the form of American Depositary Receipts ("ADRs"), European Depositary Receipts
("EDRs") or Global Depositary Receipts ("GDRs"). These securities may not
necessarily be denominated in the same currency as the securities into which
they may be converted. ADRs and EDRs are receipts typically issued by a United
States or European bank or trust company which evidence ownership of underlying
securities issued by a foreign corporation. GDRs are depositary receipts
structured like global debt issues to facilitate international trading. The Fund
may invest in ADRs, EDRs and GDRs through "sponsored" or "unsponsored"
facilities. A sponsored facility is established jointly by the issuer of the
underlying security and a depositary, whereas a depositary may establish an
unsponsored facility without participation by the issuer of the deposited
security. Holders of unsponsored depositary receipts generally bear all the
costs of such facilities and the depositary of an unsponsored facility
frequently is under no obligation to distribute shareholder communications
received from the issuer of the deposited security or to pass through voting
rights to the holders of such receipts in respect of the deposited securities.

INVESTMENT COMPANY SECURITIES

    The Fund may invest in securities issued by other investment companies.
Under the 1940 Act, the Fund's investments in such securities currently are
limited to, subject to certain exceptions, (i) 3% of the total voting stock of
any one investment company, (ii) 5% of the Fund's net assets with respect to any
one investment company and (iii) 10% of the Fund's net assets in the aggregate.
Investments in the securities of other investment companies will involve
duplication of advisory fees and certain other expenses. The Fund presently
intends to invest in other investment companies only as investment vehicles for
short-term cash. The Fund will only invest in securities of other investment
companies which are purchased on the open market with no commission or profit to
a sponsor or dealer, other than the customary broker's commission, or when the
purchase is part of a plan of merger, consolidation, reorganization or
acquisition.

                                      -9-
<PAGE>
 
CONVERTIBLE SECURITIES

    The Fund may invest in convertible securities, such as convertible
debentures, bonds and preferred stock, primarily for their equity
characteristics. Convertible securities may be converted into common stock at a
specified share price or ratio. Because the price of the common stock may
fluctuate above or below the specified price or ratio, the Fund may have the
opportunity to purchase the common stock at below market price. On the other
hand, fluctuations in the price of the common stock could render the right of
conversion worthless.

REPURCHASE AGREEMENTS

    The repurchase price under repurchase agreements generally equals the price
paid by the Fund involved plus interest negotiated on the basis of current
short-term rates (which may be more or less than the rate on the securities
underlying the repurchase agreement).  Securities subject to repurchase
agreements will be held by RBB's custodian in the Federal Reserve/Treasury book-
entry system or by another authorized securities depository.  Repurchase
agreements are considered to be loans by the Fund involved under the 1940 Act.

REVERSE REPURCHASE AGREEMENTS

    Reverse repurchase agreements involve the sale of securities held by the
Fund pursuant to the Fund's agreement to repurchase the securities at an agreed
upon price, date and rate of interest. Such agreements are considered to be
borrowings under the 1940 Act, and may be entered into only for temporary or
emergency purposes. While reverse repurchase transactions are outstanding, the
Fund will maintain in a segregated account with its custodian or a qualified 
sub-custodian, cash, U.S. Government securities or other liquid, high-grade debt
securities of an amount at least equal to the market value of the securities,
plus accrued interest, subject to the agreement and will monitor the account to
ensure that such value is maintained. Reverse repurchase agreements involve the
risk that the market value of the securities sold by the Fund may decline below
the price of the securities the Fund is obligated to repurchase.

U.S. GOVERNMENT OBLIGATIONS

    Examples of types of U.S. Government obligations include U.S. Treasury
Bills, Treasury Notes and Treasury Bonds and the obligations of Federal Home
Loan Banks, Federal Farm Credit Banks, Federal Land Banks, the Federal Housing
Administration, Farmers Home Administration, Export-Import Bank of the United
States, Small Business Administration, Federal National Mortgage Association,
Government National Mortgage Association, General Services Administration,
Student Loan Marketing Association, Federal Home Loan Mortgage Corporation,
Federal Intermediate Credit Banks, and the Maritime Administration.

                                     -10-
<PAGE>
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS

     The Fund may purchase securities on a "when-issued" basis and may purchase
or sell securities on a "forward commitment" basis. These transactions involve a
commitment by the Fund to purchase or sell particular securities with payment
and delivery taking place at a future date (perhaps one or two months later),
and permit the Fund to lock-in a price or yield on a security it owns or intends
to purchase, regardless of future changes in interest rates. When-issued and
forward commitment transactions involve the risk, however, that the price or
yield obtained in a transaction may be less favorable that the price or yield
available in the market when the securities delivery takes place. The Fund's
when-issued purchases and forward commitments are not expected to exceed 25% of
the value of its total assets absent unusual market conditions. The Fund does
not intend to engage in when-issued purchases and forward commitments for
speculative purposes but only in furtherance of their investment objectives.

PORTFOLIO TURNOVER

     The Fund may be subject to a greater degree of turnover and thus a higher
incidence of short-term capital gains taxable as ordinary income than might be
expected from portfolios which invest substantially all of their assets on a
long-term basis, and correspondingly larger brokerage charges and other
transaction costs can be expected to be borne by the Fund.  Investment
strategies which require periodic changes to portfolio holdings with the
expectation of outperforming equity indices are called "active" strategies.
These compare with "passive" or "index" strategies which hold only the stocks in
the equity indices.  Passive strategies trade infrequently -- only as the
indices change.  Most equity mutual funds, including the Fund, pursue active
strategies, which have higher turnover than passive strategies.

     High portfolio turnover (100% or more) can adversely affect taxable
investors, especially those in higher marginal tax brackets, in two ways:
First, short term capital gains, which are a by-product or high turnover
investment strategies, are currently taxed at rates comparable to ordinary
income rates.  Ordinary income tax rates are higher than long term capital gain
tax rates for middle and upper income taxpayers.  Second, the frequent
realization of gains, which causes taxes to be paid frequently, is less
advantageous than infrequent realization of gains.  Infrequent realization of
gains allows the payment of taxes to be deferred to later years, allowing more
of the gains to compound before taxes are paid.  Consequently after-tax compound
rates of return will generally be higher for taxable investors using investment
strategies with very low turnover, all else being equal.

     Although tax considerations should not typically drive an investment
decision, investors should consider their ability to allocate tax-deferred (such
as IRAs and 401(k) plans) versus taxable assets when considering where to
invest.  All else being equal, investors will earn better returns investing tax-
deferred assets in active strategies, while using lower turnover passive
strategies for taxable investments.  For further information, see "Taxes" below.

                                      -11-
<PAGE>
 
     The Portfolio turnover rate is calculated by dividing the lesser of the
Fund's annual sales or purchases of portfolio securities (exclusive of purchases
or sales of securities whose maturities at the time of acquisition were one year
or less) by the monthly average value of the securities in the portfolio during
the year.

                            INVESTMENT LIMITATIONS

     The Fund has adopted the following fundamental investment limitations which
may not be changed without the affirmative vote of the holders of a majority of
the Fund's outstanding shares (as defined in Section 2(a)(42) of the 1940 Act).
The Fund may not:

     1.  Purchase securities of any one issuer, other than securities issued or
guaranteed by the U.S. Government or its agencies or instrumentalities, if
immediately after and as a result of such purchase more than 5% of the Fund's
total assets would be invested in the securities of such issuer, or more than
10% of the outstanding voting securities of such issuer would be owned by the
Fund, except that up to 25% of the value of the Fund's assets may be invested
without regard to such limitation.

     2.  Borrow money, except to the extent permitted under the 1940 Act or
mortgage, pledge or hypothecate any of their respective assets in connection
with any such borrowing except in amounts not in excess of 125% of the dollar
amounts borrowed.  The 1940 Act permits an investment company to borrow in an
amount up to 33 1/3% of the value of such company's total assets.  For purposes
of this Investment Restriction, the entry into options, forward contracts,
futures contracts, including those relating to indexes, and options on futures
contracts or indexes shall not constitute borrowing.

     3.  Purchase any securities which would cause, at the time of purchase, 25%
or more of the value of the total assets of the Fund to be invested in the
obligations of issuers in any industry, provided that there is no limitation
with respect to investments in U.S. Government obligations.

     4.  Make loans, except that the Fund may purchase or hold debt obligations
in accordance with its investment objective, policies and limitations, may enter
into repurchase agreements for securities, and may lend portfolio securities
against collateral consisting of cash or securities which are consistent with
the Fund's permitted investments, which is equal at all times to at least 100%
of the value of the securities loaned. There is no investment restriction on the
amount of securities that may be loaned, except that payments received on such
loans, including amounts received during the loan on account of interest on the
securities loaned, may not (together with all non-qualifying income) exceed 10%
of the Fund's annual gross income (without offset for realized capital gains)
unless, in the opinion of counsel to RBB, such amounts are qualifying income
under Federal income tax provisions applicable to regulated investment
companies.

     5.  Purchase securities on margin, except for short-term credit necessary
for clearance of portfolio transactions, and except that the Fund may establish
margin accounts in connection 

                                      -12-
<PAGE>
 
with its use of options, forward contracts, futures contracts, including those
relating to indexes, and options on futures contracts or indexes.

     6.  Underwrite securities of other issuers, except to the extent that, in
connection with the disposition of portfolio securities, the Fund may be deemed
an underwriter under federal securities laws.

     7.  Purchase or sell real estate or real estate limited partnership
interests, provided that the Fund may invest in securities secured by real
estate or interests therein or issued by companies which invest in real estate
or interests therein or in real estate investment trusts.

     8.  Purchase or sell commodities or commodity contracts, except that the
Fund may purchase and sell options, forward contracts, futures contracts,
including those relating to indexes, and options on futures contracts or
indexes.

     9.  Invest in oil, gas or mineral-related exploration or development
programs or leases.

     10.  Purchase any securities issued by any other investment company, except
to the extent permitted by the 1940 Act and except in connection with the
merger, consolidation or acquisition of all the securities or assets of such an
issuer.

     11.  Make investments for the purpose of exercising control or management,
but each Fund will vote those securities it owns in its portfolio as a
shareholder in accordance with its views.

     12.  Issue any senior security, as defined in section 18(f) of the 1940
Act, except to the extent permitted by the 1940 Act.

     13.  Pledge, mortgage or hypothecate its assets, except to the extent
necessary to secure permitted borrowings as described in Limitation 2 above and
to the extent related to the purchase of securities on a when-issued or forward
commitment basis and the deposit of assets in escrow in connection with writing
covered put and call options and collateral and initial or variation margin
arrangements with respect to options, forward contracts, futures contracts,
including those relating to indexes, and options on futures contracts or
indexes.

                            DIRECTORS AND OFFICERS

     The directors and executive officers of RBB, their ages, business addresses
and principal occupations during the past five years are:

<TABLE>
<CAPTION>
                                           Position          Principal Occupation
Name and Address and Age                   with Fund         During Past Five Years
- ------------------------                   ---------         ----------------------
<S>                                        <C>               <C>
*Arnold M. Reichman 50                     Director          Senior Managing Director, Chief
</TABLE> 

                                      -13-
<PAGE>
 
<TABLE> 
<CAPTION> 
                                           Position          Principal Occupation
Name and Address and Age                   with Fund         During Past Five Years
- ------------------------                   ---------         ----------------------
<S>                                        <C>               <C>
466 Lexington  Avenue                                        Operating Officer and Assistant
New York, NY 10017                                           Secretary, Warburg Pincus Asset
                                                             Management, Inc.; Director and
                                                             Executive Officer of Counsellors
                                                             Securities Inc.; Director/Trustee
                                                             of various investment companies
                                                             advised by Warburg Pincus Asset
                                                             Management, Inc.
 
*Robert Sablowsky 59                       Director          Senior Vice President, Fahnestock
110 Wall Street                                              Co., Inc. (a registered
New York, NY 10005                                           broker-dealer); Prior to October
                                                             1996, Executive Vice President of
                                                             Gruntal & Co., Inc. (a registered
                                                             broker-dealer).
 
Francis J. McKay 61                        Director          Since 1963, Executive Vice
7701 Burholme Avenue                                         President, Fox Chase Cancer Center
Philadelphia, PA 19111                                       (biomedical research and medical
                                                             care).
 
Marvin E. Sternberg 63                     Director          Since 1974, Chairman, Director and
937 Mt. Pleasant Road                                        President, Moyco Industries, Inc.
Bryn Mawr, PA  19010                                         (manufacturer of dental supplies
                                                             and precision coated abrasives);
                                                             since 1968, Director and
                                                             President, Mart MMM, Inc.
                                                             (formerly Montgomeryville
                                                             Merchandise Mart Inc.) and Mart
                                                             PMM, Inc. (formerly Pennsauken
                                                             Merchandise Mart, Inc.) (shopping
                                                             centers); and since 1975, Director
                                                             and Executive Vice President,
                                                             Cellucap Mfg. Co., Inc.
                                                             (manufacturer of disposable
                                                             headwear).

Julian A. Brodsky 64                       Director          Director and Vice Chairman since
1234 Market Street                                           1969 Comcast Corporation (cable
16th Floor                                                   television and communications);
Philadelphia, PA 19107-3723                                  Director Comcast Cablevision of
                                                             Philadelphia (cable television and
                                                             communications) and Nextel
                                                             (wireless communications).
</TABLE> 

                                      -14-
<PAGE>
 
<TABLE> 
<CAPTION> 
                                           Position          Principal Occupation
Name and Address and Age                   with Fund         During Past Five Years
- ------------------------                   ---------         ----------------------
<S>                                        <C>               <C>
Donald van Roden 73                        Director          Self-employed businessman.  From
1200 Old Mill Lane                         and Chairman of   February 1980 to March 1987, Vice
Wyomissing, PA  19610                      the Board         Chairman, SmithKline Beecham
                                                             Corporation (pharmaceuticals);
                                                             Director, AAA Mid-Atlantic (auto
                                                             service); Director, Keystone
                                                             Insurance Co.
 
Edward J. Roach 74                         President         Certified Public Accountant; Vice
Suite 100                                  and               Chairman of the Board, Fox Chase
Bellevue Park                              Treasurer         Cancer Center; Trustee Emeritus,
Corporate Center                                             Pennsylvania School for the Deaf;
400 Bellevue Parkway                                         Trustee Emeritus, Immaculata
Wilmington, DE  19809                                        College; President or Vice
                                                             President and Treasurer of various
                                                             investment companies advised by
                                                             PNC Institutional Management
                                                             Corporation; Director, The
                                                             Bradford Funds, Inc.
 
Morgan R. Jones 59                         Secretary         Chairman of the law firm of
Drinker Biddle & Reath LLP                                   Drinker Biddle & Reath LLP;
1345 Chestnut Street                                         Director, Rocking Horse Child Care
Philadelphia, PA 19107-3496                                  Centers of America, Inc.
</TABLE>

______________________

*    Each of Mr. Sablowsky and Mr. Reichman are "interested persons" of RBB, as
     that term is defined in the 1940 Act, by virtue of their respective
     positions with Fahnestock Co., Inc. and Counsellors Securities, Inc.,
     respectively, each a registered broker-dealer.

          Messrs. McKay, Sternberg and Brodsky are members of the Audit
Committee of the Board of Directors. The Audit Committee, among other things,
reviews results of the annual audit and recommends to RBB the firm to be
selected as independent auditors.

          Messrs. Reichman, McKay and van Roden are members of the Executive
Committee of the Board of Directors. The Executive Committee may generally carry
on and manage the business of RBB when the Board of Directors is not in session.

                                      -15-
<PAGE>
 
          Messrs. McKay, Sternberg, Brodsky and van Roden are members of the
Nominating Committee of the Board of Directors. The Nominating Committee
recommends to the Board all persons to be nominated as directors of RBB.

          RBB pays directors who are not "affiliated persons" (as that term is
defined in the 1940 Act) of any investment adviser or sub-adviser of the Fund or
the Distributor and Mr. Sablowsky, who is considered to be an affiliated person,
$12,000 annually and $1,000 per meeting of the Board or any committee thereof
that is not held in conjunction with a Board meeting. In addition, the Chairman
of the Board receives an additional fee of $5,000 per year for his services in
this capacity. Directors who are not affiliated persons of RBB and Mr. Sablowsky
are reimbursed for any expenses incurred in attending meetings of the Board of
Directors or any committee thereof. For the year ended August 31, 1997, each of
the following members of the Board of Directors received compensation from RBB
in the following amounts:

                            Directors' Compensation
                            -----------------------

<TABLE>
<CAPTION>
                                                  PENSION OR
                                                  RETIREMENT
                                                  BENEFITS            ESTIMATED 
                            AGGREGATE             ACCRUED AS          ANNUAL
                            COMPENSATION          PART OF FUND        BENEFITS UPON    
NAME OF PERSON/ POSITION    FROM REGISTRANT       EXPENSES            RETIREMENT
- ------------------------    ---------------       --------            ----------
<S>                         <C>                   <C>                 <C>
Julian A. Brodsky,           $16,000                  N/A                 N/A
Director                                                                     
Francis J. McKay,            $19,000                  N/A                 N/A
Director                                                                     
Arnold M. Reichman,          $     0                  N/A                 N/A
Director                                                                     
Robert Sablowsky,            $ 8,000                  N/A                 N/A 
Director
Marvin E. Sternberg,         $19,000                  N/A                 N/A
Director                                                                     
Donald van Roden,            $24,000                  N/A                 N/A 
Director and Chairman
</TABLE>

______________________

          On October 24, 1990, RBB adopted, as a participating employer, the
Fund Office Retirement Profit-Sharing Plan and Trust Agreement, a retirement
plan for employees (currently Edward J. Roach and one other employee), pursuant
to which RBB will contribute on a quarterly basis amounts equal to 10% of the
quarterly compensation of each eligible employee.  By virtue 

                                      -16-
<PAGE>
 
of the services performed by RBB's advisers, custodians, administrators and
distributor, RBB itself requires only two part-time employees. Drinker Biddle &
Reath LLP, of which Mr. Jones is a partner, receives legal fees as counsel to
RBB. No officer, director or employee of Numeric or the Distributor currently
receives any compensation from RBB.

INVESTMENT ADVISORY, DISTRIBUTION AND SERVICING ARRANGEMENTS

ADVISORY AGREEMENTS

     Numeric renders advisory services to the Fund pursuant to an Investment
Advisory Agreement.  The Advisory Agreement relating to the Fund is dated
November 30, 1998.  Under the Advisory Agreement, Numeric is entitled to receive
a fee from the Fund calculated at an annual rate of 0.75% of the Fund's average
daily net assets.  For the fiscal year ended August 31, 1999, Numeric intends to
waive its fees to the extent necessary to maintain an annualized expense ratio
for the Fund of 1.00%.  There can be no assurance that Numeric will continue
such waivers indefinitely.

     The Fund bears all of its own expenses not specifically assumed by Numeric.
General expenses of RBB not readily identifiable as belonging to a portfolio of
RBB are allocated among all investment portfolios by or under the direction of
RBB's Board of Directors in such manner as the Board determines to be fair and
equitable. Expenses borne by the Fund include, but are not limited to the
expenses listed in the prospectus and the following (or the Fund's share of the
following): (a) the cost (including brokerage commissions) of securities
purchased or sold by the Fund and any losses incurred in connection therewith;
(b) expenses of organizing RBB that are not attributable to a class of RBB; (c)
any costs, expenses or losses arising out of a liability of or claim for damages
or other relief asserted against RBB or the Fund for violation of any law; (d)
any extraordinary expenses; (e) fees, voluntary assessments and other expenses
incurred in connection with membership in investment company organizations; (f)
costs of mailing and tabulating proxies and costs of shareholders' and
directors' meetings; and (g) the cost of investment company literature and other
publications provided by RBB to its directors and officers. Distribution
expenses, transfer agency expenses, expenses of preparation, printing and
mailing prospectuses, statements of additional information, proxy statements and
reports to shareholders, and organizational expenses and registration fees,
identified as belonging to a particular class of RBB, are allocated to such
class.

     Under the Advisory Agreements, Numeric will not be liable for any error of
judgment or mistake of law or for any loss suffered by RBB or the Fund in
connection with the performance of an Advisory Agreement, except a loss
resulting from willful misfeasance, bad faith or gross negligence on the part of
Numeric in the performance of its duties or from reckless disregard of its
duties and obligations thereunder.

     The Advisory Agreement for the Small Cap Value Fund was approved on October
28, 1998 by vote of RBB's Board of Directors, including a majority of those
directors who are not parties to the Advisory Agreement or interested persons
(as defined in the 1940 Act) of such parties.  The Advisory Agreement is
terminable by vote of RBB's Board of Directors or by the holders of a majority
of the outstanding voting securities of the Fund, at any time without 

                                      -17-
<PAGE>
 
penalty, on 60 days' written notice to Numeric. The Advisory Agreement for the
Small Cap Value Fund became effective on November 30, 1998 and was approved by
written consent of the sole shareholder of the Fund on November 30, 1998. The
Advisory Agreement terminates automatically in the event of assignment thereof.

     The Advisory Agreement provides that Numeric shall at all times have all
rights in and to the Fund's name and all investment models used by or on behalf
of the Fund.  Numeric may use the Fund's name or any portion thereof in
connection with any other mutual fund or business activity without the consent
of any shareholder, and RBB has agreed to execute and deliver any and all
documents required to indicate its consent to such use.

     The Advisory Agreement further provides that no public reference to, or
description of, Numeric or its methodology or work shall be made by RBB, whether
in the Prospectus, Statement of Additional Information or otherwise, without the
prior written consent of Numeric, which consent shall not be unreasonably
withheld.  In each case, RBB has agreed to provide Numeric a reasonable
opportunity to review any such reference or description before being asked for
such consent.

CUSTODIAN AGREEMENTS

     Custodial Trust Company ("CTC") is custodian of the N/I NUMERIC INVESTORS
Funds' (the "Funds") assets pursuant to custodian agreements dated as of May 20,
1996, as amended (the "Custodian Agreements").  Under the Custodian Agreements,
CTC (a) maintains a separate account or accounts in the name of each of the
Funds, (b) holds and transfers portfolio securities on account of each of the
Funds, (c) accepts receipts and makes disbursements of money on behalf of each
of the Funds, (d) collects and receives all income and other payments and
distributions on account of each of the Funds' portfolio securities and (e)
makes periodic reports to the RBB's Board of Directors concerning the Funds'
operations.  CTC is authorized to select one or more banks or trust companies to
serve as sub-custodian on behalf of the Funds, provided that CTC remains
responsible for the performance of all its duties under the Custodian Agreements
and holds RBB harmless from the acts and omissions of any sub-custodian.  For
its services to the Funds under the Custodian Agreements, CTC receives a fee
calculated at .015% of each Fund's average daily gross assets, with a minimum
monthly fee of $417 per Fund, exclusive of transaction charges and out-of-pocket
expenses, which are also charged to the Funds.

                                      -18-
<PAGE>
 
TRANSFER AGENCY AGREEMENTS

     PFPC Inc. ("PFPC"), an affiliate of PNC Bank, serves as the transfer and
dividend disbursing agent for the Funds pursuant to a Transfer Agency Agreement
dated August 16, 1988, as supplemented (collectively, the "Transfer Agency
Agreement").  Under the Transfer Agency Agreement, PFPC (a) issues and redeems
Shares of each of the Funds, (b) addresses and mails all communications by the
Funds to record owners of shares of the Funds, including reports to
shareholders, dividend and distribution notices and proxy materials for its
meetings of shareholders, (c) maintains shareholder accounts and, if requested,
sub-accounts and (d) makes periodic reports to RBB's Board of Directors
concerning the operations of the Funds.  For its services to the Funds under the
Transfer Agency Agreement, PFPC receives a fee at the annual rate of $12 per
account for the Funds, exclusive of out-of-pocket expenses, and also receives
reimbursement of its out-of-pocket expenses.

CO-ADMINISTRATION AGREEMENTS

     Bear Stearns Funds Management Inc. ("BSFM") serves as co-administrator to
the Funds pursuant to Co-Administration Agreements dated April 24, 1996, as
amended, for each of the Funds (the "BSFM Co-Administration Agreements").  BSFM
has agreed to assist each of the Funds in all significant aspects of their
administration and operations.  The BSFM Co-Administration Agreements provide
that BSFM shall not be liable for any error of judgment or mistake of law or any
loss suffered by RBB or the Funds in connection with the performance of the
agreement, except a loss resulting from willful misfeasance, bad faith or
negligence, or reckless disregard of its duties and obligations thereunder.  In
consideration for providing services pursuant to the BSFM Co-Administration
Agreements, BSFM receives a fee with respect to each of the Funds calculated at
an annual rate of .05% of the first $150 million of each Fund's average daily
net assets and .02% on all assets above $150 million.

     PFPC also serves as co-administrator to Funds pursuant to Co-Administration
Agreements dated as of April 24, 1996, as amended (the "PFPC Co-Administration
Agreements").  PFPC has agreed to calculate the Funds' net asset values, provide
all accounting services for the Funds and assist in related aspects of the
Funds' operations. The PFPC Co-Administration Agreements provide that PFPC shall
not be liable for any error of judgment or mistake of law or any loss suffered
by RBB or the Funds in connection with the performance of the agreement, except
a loss resulting from willful misfeasance, bad faith or negligence, or reckless
disregard of its duties and obligations thereunder.  In consideration for
providing services pursuant to the PFPC Co-Administration Agreements, PFPC
receives a fee with respect to each of the Funds calculated at an annual rate of
 .125% of each Fund's average daily net assets, exclusive of out-of-pocket
expenses and pricing charges.  PFPC is currently waiving fees in excess of .115%
of each Fund's average daily net assets.

ADMINISTRATIVE SERVICES AGENT

     Provident Distributors, Inc. ("PDI") provides certain administrative
services to the Fund that are not provided by BSFM or PFPC.  These services
include furnishing corporate secretarial, data processing and clerical services,
acting as liaison between the Fund and various service

                                      -19-
<PAGE>
 
providers and coordinating the preparation of proxy statements and annual, semi-
annual and quarterly reports. As compensation for such administrative services,
PDI is entitled to a monthly fee calculated at the annual rate of .15% of the
Fund's average daily net assets. PDI is currently waiving fees in excess of .03%
of the Fund's average daily net assets.


DISTRIBUTOR

     PDI serves as distributor of the Shares pursuant to the terms of a
distribution agreement dated as of May 29, 1998 (the "Distribution Agreement"),
entered into by PDI and RBB.  No compensation is payable by RBB to PDI for
distribution services with respect to the Fund.


                               FUND TRANSACTIONS

     Subject to policies established by the Board of Directors, Numeric is
responsible for the execution of portfolio transactions and the allocation of
brokerage transactions for the Fund.  In executing portfolio transactions,
Numeric seeks to obtain the best price and most favorable execution for the
Fund, taking into account such factors as the price (including the applicable
brokerage commission or dealer spread), size of the order, difficulty of
execution and operational facilities of the firm involved.  While Numeric
generally seeks reasonably competitive commission rates, payment of the lowest
commission or spread is not necessarily consistent with obtaining the best price
and execution in particular transactions.

     The Fund has no obligation to deal with any broker or group of brokers in
the execution of portfolio transactions.  Numeric may, consistent with the
interests of the Fund and subject to the approval of the Board of Directors,
select brokers on the basis of the research, statistical and pricing services
they provide to the Fund and other clients of Numeric.  Information and research
received from such brokers will be in addition to, and not in lieu of, the
services required to be performed by Numeric under its respective contracts. A
commission paid to such brokers may be higher than that which another qualified
broker would have charged for effecting the same transaction, provided that
Numeric, as applicable, determines in good faith that such commission is
reasonable in terms either of the transaction or the overall responsibility of
Numeric, as applicable, to the Fund and its other clients and that the total
commissions paid by the Fund will be reasonable in relation to the benefits to
the Fund over the long-term.

     Corporate debt and U.S. Government securities and many small-cap stocks are
generally traded on the over-the-counter market on a "net" basis without a
stated commission, through dealers acting for their own account and not as
brokers.  The Fund will primarily engage in transactions with these dealers or
deal directly with the issuer unless a better price or execution could be
obtained by using a broker.  Prices paid to a dealer in debt or small-cap
securities will generally include a "spread," which is the difference between
the prices at which the dealer is willing to purchase and sell the specific
security at the time, and includes the dealer's normal profit.

                                      -20-
<PAGE>
 
     Numeric may seek to obtain an undertaking from issuers of commercial paper
or dealers selling commercial paper to consider the repurchase of such
securities from the Fund prior to their maturity at their original cost plus
interest (sometimes adjusted to reflect the actual maturity of the securities),
if it believes that the Fund's anticipated need for liquidity makes such action
desirable.  Any such repurchase prior to maturity reduces the possibility that
the Fund would incur a capital loss in liquidating commercial paper (for which
there is no established market), especially if interest rates have risen since
acquisition of the particular commercial paper.

     Investment decisions for the Fund and for other investment accounts managed
by Numeric are made independently of each other in the light of differing
conditions.  However, the same investment decision may occasionally be made for
two or more of such accounts. In such cases, simultaneous transactions are
inevitable. Purchases or sales are then averaged as to price and allocated as to
amount according to a formula deemed equitable to each such account. While in
some cases this practice could have a detrimental effect upon the price or value
of the security as far as the Fund is concerned, in other cases it is believed
to be beneficial to the Fund. The Fund will not purchase securities during the
existence of any underwriting or selling group relating to such security of
which Numeric or any affiliated person (as defined in the 1940 Act) thereof is a
member except pursuant to procedures adopted by RBB's Board of Directors
pursuant to Rule 10f-3 under the 1940 Act.

     In no instance will portfolio securities be purchased from or sold to PDI,
PNC Bank or Numeric or any affiliated person of the foregoing entities except as
permitted by SEC exemptive order or by applicable law.

                      PURCHASE AND REDEMPTION INFORMATION

     The Fund reserves the right, if conditions exist that make cash payments
undesirable, to honor any request for redemption or repurchase of the Fund's
shares by making payment in whole or in part in securities chosen by RBB and
valued in the same way as they would be valued for purposes of computing a
Fund's net asset value.  If payment is made in securities, a shareholder may
incur transaction costs in converting these securities into cash.  RBB has
elected, however, to be governed by Rule 18f-1 under the 1940 Act so that the
Fund is obligated to redeem its shares solely in cash up to the lesser of
$250,000 or 1% of its net asset value during any 90-day period for any one
shareholder of the Fund.

     Under the 1940 Act, the Fund may suspend the right to redemption or
postpone the date of payment upon redemption for any period during which the New
York Stock Exchange (the "NYSE") is closed (other than customary weekend and
holiday closings), or during which trading on the NYSE is restricted, or during
which (as determined by the SEC by rule or regulation) an emergency exists as a
result of which disposal or valuation of portfolio securities is not reasonably
practicable, or for such other periods as the SEC may permit.  (The Fund may
also suspend or postpone the recordation of the transfer of its shares upon the
occurrence of any of the foregoing conditions.)

     In addition to the situations described in the Prospectus, the Fund may
redeem shares involuntarily to reimburse it for any loss sustained by reason of
the failure of a shareholder to 

                                      -21-
<PAGE>
 
make full payment for shares purchased by the shareholder or to collect any
charge relating to a transaction effected for the benefit of a shareholder as
provided in the Prospectus from time to time.

     An illustration of the computation of the public offering price per share
of each of the Fund, based on the value of the Fund's net assets as of September
15, 1998, is as follows:

<TABLE>
<CAPTION>
               ---------------------------------------------
                                                    Small        
                                                  Cap Value      
                                                  ---------      
               ---------------------------------------------
               <S>                                <C>                 
               Net assets.......................    $10.00
               ---------------------------------------------
               Outstanding shares...............         1
               ---------------------------------------------
               Net asset value per share........                      
                                                    $10.00
               ---------------------------------------------
               Maximum sales charge.............        --
               ---------------------------------------------
               Maximum Offering Price to 
               Public...........................    $10.00
               ---------------------------------------------
</TABLE>

                              VALUATION OF SHARES

     The net asset value per share of the Fund is calculated as of the close of
regular trading on the NYSE (generally 4:00 p.m. Eastern Time) on each Business
Day.  "Business Day" means each weekday when the NYSE is open.  Currently, the
NYSE is closed on New Year's Day, Dr. Martin Luther King, Jr. Day, Presidents'
Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day
and Christmas Day and on the preceding Friday or subsequent Monday when one of
those holidays falls on a Saturday or Sunday. Securities which are listed on
stock exchanges are valued at the last sale price on the day the securities are
valued or, lacking any sales on such day, at the mean of the bid and asked
prices available prior to the evaluation.  In cases where securities are traded
on more than one exchange, the securities are generally valued on the exchange
designated by the Board of Directors as the primary market.  Securities traded
in the over-the-counter market and listed on the National Association of
Securities Dealers Automatic Quotation System ("NASDAQ") are valued at the last
trade price listed on the NASDAQ at the close of regular trading (generally 4:00
p.m. Eastern Time); securities listed on NASDAQ for which there were no sales on
that day and other over-the-counter securities are valued at the mean of the bid
and asked prices available prior to valuation. Securities for which market
quotations are not readily available are valued at fair value as determined in
good faith by or under the direction of RBB's Board of Directors.  The amortized
cost method of valuation may also be used with respect to debt obligations with
sixty days or less remaining to maturity.  Net asset value per share is
calculated by adding the value of the Fund's securities, cash and other assets,
subtracting the actual and accrued liabilities of the Fund, and dividing the
result by the number of outstanding shares of the Fund.

                                      -22-
<PAGE>
 
     In determining the approximate market value of portfolio investments, the
Fund may employ outside organizations, which may use a matrix or formula method
that takes into consideration market indices, matrices, yield curves and other
specific adjustments.  This may result in the securities being valued at a price
different from the price that would have been determined had the matrix or
formula method not been used.  All cash, receivables and current payables are
carried on the Fund's books at their face value.  Other assets, if any, are
valued at fair value as determined in good faith by or under the direction of
RBB's Board of Directors.


                            PERFORMANCE INFORMATION

     TOTAL RETURN.  For purposes of quoting and comparing the performance of the
Fund to that of other mutual funds and to stock or other relevant indices in
advertisements or in reports to shareholders, performance may be stated in terms
of total return.  Under the rules of the Securities and Exchange Commission,
funds advertising performance must include total return quotes calculated
according to the following formula:

     P(1 + T)/n/ = ERV

     Where:    P =  hypothetical initial payment of $1,000

                    T = average annual total return

                    n = number of years (1, 5 or 10)

                    ERV = ending redeemable value at the end of the 1, 5 or 10
                             year periods (or fractional portion thereof) of a
                             hypothetical $1,000 payment made at the beginning
                             of the 1, 5 or 10 year periods.

     Under the foregoing formula, the time periods used in advertising will be
based on rolling calendar quarters, updated to the last day of the most recent
quarter prior to submission of the advertisement for publication, and will cover
one, five and ten year periods or a shorter period dating from the effectiveness
of the Fund's registration statement.  In calculating the ending redeemable
value, the maximum sales load is deducted from the initial $1,000 payment and
all dividends and distributions by the Fund are assumed to have been reinvested
at net asset value, as described in the Prospectus, on the reinvestment dates
during the period.  Total return, or "T" in the formula above, is computed by
finding the average annual compounded rates of return over the 1, 5 and 10 year
periods (or fractional portion thereof) that would equate the initial amount
invested to the ending redeemable value.  Any sales loads that might in the
future be made applicable at the time to reinvestments would be included as
would any recurring account charges that might be imposed by the Fund.

     The formula for calculating aggregate total return is as follows:

                                      -23-
<PAGE>
 
                                                     ERV
                         Aggregate Total Return = [(----) - 1]
                                                      P

          The calculations are made assuming that (1) all dividends and capital
gain distributions are reinvested on the reinvestment dates at the price per
share existing on the reinvestment date, (2) all recurring fees charged to all
shareholder accounts are included, and (3) for any account fees that vary with
the size of the account, a mean (or median) account size in the Fund during the
periods is reflected. The ending redeemable value (variable "ERV" in the
formula) is determined by assuming complete redemption of the hypothetical
investment after deduction of all non-recurring charges at the end of the
measuring period.

     PERFORMANCE. From time to time, the Fund may advertise its average annual
total return over various periods of time. These total return figures show the
average percentage change in value of an investment in the Fund from the
beginning of the measuring period to the end of the measuring period. The
figures reflect changes in the price of the Fund's shares assuming that any
income dividends and/or capital gain distributions made by the Fund during the
period were reinvested in shares of the Fund. Total return will be shown for
recent one-, five- and ten-year periods, and may be shown for other periods as
well (such as from commencement of the Fund's operations or on a year-by-year,
quarterly or current year-to-date basis).

     When considering average total return figures for periods longer than one
year, it is important to note that the Fund's annual total return for one year
in the period might have been greater or less than the average for the entire
period.  When considering total return figures for periods shorter than one
year, investors should bear in mind that the Fund seeks long-term appreciation
and that such return may not be representative of the Fund's return over a
longer market cycle.  The Fund may also advertise aggregate total return figures
for various periods, representing the cumulative change in value of an
investment in the Fund for the specific period (again reflecting changes in the
Fund's share prices and assuming reinvestment of dividends and distributions).
Aggregate and average total returns may be shown by means of schedules, charts
or graphs, may indicate various components of total return (i.e., change in
value of initial investment, income dividends and capital gain distributions)
and would be quoted separately for each class of the Fund's shares.

                                      -24-
<PAGE>
 
     Investors should note that total return figures are based on historical
earnings and are not intended to indicate future performance.

     In reports or other communications to investors or in advertising material,
the Fund may describe general economic and market conditions affecting the Fund
and may compare its performance with (1) that of other mutual funds as listed in
the rankings prepared by Lipper Analytical Services, Inc. or similar investment
services that monitor the performance of mutual funds or as set forth in the
publications listed below; (2) with their benchmark indices, as well as the S&P
500 or (3) other appropriate indices of investment securities or with data
developed by Numeric derived from such indices.  Performance information may
also include evaluation of the Fund by nationally recognized ranking services
and information as reported in financial publications such as Business Week,
Fortune, Institutional Investor, Money Magazine, Forbes,  Barron's, The Wall
Street Journal, The New York Times, or other national, regional or local
publications.

     In reports or other communications to investors or in advertising, the Fund
may also describe the general biography or work experience of the portfolio
managers of the Fund and may include quotations attributable to the portfolio
managers describing approaches taken in managing the Fund's investments,
research methodology, underlying stock selection or the Fund's investment
objective.  The Fund may also discuss the continuum of risk and return relating
to different investments, and the potential impact of foreign stock on a
portfolio otherwise composed of domestic securities.  In addition, the Fund may
from time to time compare its expense ratio to those of investment companies
with similar objective and policies, as advertised by Lipper Analytical
Services, Inc. or similar investment services that monitor mutual funds.

                                     TAXES

          The following is only a summary of certain additional tax
considerations generally affecting the Fund and its shareholders that are not
described in the Prospectus. No attempt is made to present a detailed
explanation of the tax treatment of the Fund or its shareholders, and the
discussion in this Statement of Additional Information and in the Prospectus is
not intended as a substitute for careful tax planning. Investors are urged to
consult their tax advisers with specific reference to their own tax situation.

          The Fund has elected to be taxed as a regulated investment company
under Part I of Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue
Code of 1986, as amended (the "Code"). As a regulated investment company, the
Fund is exempt from federal income tax on its net investment income and realized
capital gains that it distributes to shareholders, provided that it distributes
an amount equal to the sum of (a) at least 90% of its investment company taxable
income (net taxable investment income and the excess of net short-term capital
gain over net long-term capital loss, if any, for the year) and (b) at least 90%
of its net tax-exempt interest income, if any, for the year (the "Distribution
Requirement") and satisfies certain

                                      -25-
<PAGE>
 
other requirements of the Code that are described below. Distributions of
investment company taxable income made during the taxable year or, under
specified circumstances, within twelve months after the close of the taxable
year will satisfy the Distribution Requirement.

     In addition to the foregoing requirements, at the close of each quarter of
the Fund's taxable year, at least 50% of the value of the Fund's assets must
consist of cash and cash items, U.S. Government securities, securities of other
regulated investment companies, and securities of other issuers (as to which the
Fund has not invested more than 5% of the value of its total assets in
securities of such issuer and as to which the Fund does not hold more than 10%
of the outstanding voting securities of such issuer), and no more than 25% of
the value of the Fund's total assets may be invested in the securities of any
one issuer (other than U.S. Government securities and securities of other
regulated investment companies), or in two or more issuers which the Fund
controls and which are engaged in the same or similar trades or businesses (the
"Asset Diversification Requirement").   

     Distributions of investment company taxable income will be taxable (subject
to the possible allowance of the dividend received deduction described below) to
shareholders as ordinary income, regardless of whether such distributions are
paid in cash or are reinvested in shares. Shareholders receiving any
distribution from the Fund in the form of additional shares will be treated as
receiving a taxable distribution in an amount equal to the fair market value of
the shares received, determined as of the reinvestment date.

     The Fund intends to distribute to shareholders its net capital gain (excess
of net long-term capital gain over net short-term capital loss), if any, for
each taxable year. Such gain is distributed as a capital gain dividend and is
taxable to shareholders as long-term capital gain, regardless of the length of
time the shareholder has held his shares, whether such gain was recognized by
the Fund prior to the date on which a shareholder acquired shares of the Fund
and whether the distribution was paid in cash or reinvested in shares. The
aggregate amount of distributed designated by the Fund as capital gain dividends
may not exceed the net capital gain of a Fund for any taxable year, determined
by excluding any net capital loss or net long-term capital loss attributable to
transactions occurring after October 31 of such year and by treating any such
loss as if it arose on the first day of the following taxable year. Such
distributions will be designated as capital gain dividends in a written notice
mailed by the Fund to shareholders not later than 60 days after the close of the
Fund's taxable year.

     In the case of shareholders that are corporations, distributions (other
than capital gain dividends) of the Fund for any taxable year generally qualify
for the dividends received deduction to the extent of the gross amount of
"qualifying dividends" received by the Fund for the year. Generally, a dividend
will be treated as a "qualifying dividend" if it has been received from a
domestic corporation. Distributions of net investment income received by the
Fund from investments in debt securities will be taxable to shareholders as
ordinary income and will not be treated as "qualifying dividends" for purposes
of the dividends received deduction. The Fund will designate the portion, if
any, of the distribution made by the Fund that qualifies for the dividends
received deduction in a written notice mailed by the Fund to corporate
shareholders not later than 60 days after the close of the Fund's taxable year.

                                      -26-
<PAGE>
 
     If for any taxable year the Fund were to fail to qualify as a regulated
investment company, all of its taxable income would be subject to tax at regular
corporate rates without any deduction for distributions to shareholders, and all
distributions would be taxable as ordinary dividends to the extent of the Fund's
current and accumulated earnings and profits.  Such distributions would be
eligible for the dividends received deduction in the case of corporate
shareholders.

     A shareholder will recognize gain or loss upon a redemption of shares or an
exchange of shares of the Fund for shares of another N/I NUMERIC INVESTORS Fund
upon exercise of the exchange privilege, to the extent of any difference between
the price at which the shares are redeemed or exchanged and the price or prices
at which the shares were originally purchased for cash.  However, any loss
realized on a sale of shares of the Fund will be disallowed to the extent an
investor repurchases shares of the Fund within a period of 61 days (beginning 30
days before and ending 30 days after the day of disposition of the shares).
Dividends paid by the Fund in the form of shares within the 61-day period would
be treated as a purchase for this purpose.

     The Code imposes a nondeductible 4% excise tax on regulated investment
companies that do not distribute with respect to each calendar year an amount
equal to 98% of their ordinary income for the calendar year plus 98% of their
capital gain net income for the 1-year period ending on October 31 of such
calendar year.  The balance of such income must be distributed during the next
calendar year.  For the foregoing purposes, a company is treated as having
distributed any amount on which it is subject to income tax for any taxable year
ending in such calendar year.  Investors should note that a Fund may in certain
circumstances be required to liquidate investments in order to make sufficient
distributions to avoid excise tax liability.

     The Fund will be required in certain cases to withhold and remit to the
United States Treasury 31% of dividends paid to any shareholder (1) who has
provided either an incorrect tax identification number or no number at all, (2)
who is subject to backup withholding by the Internal Revenue Service for failure
to report the receipt of interest or dividend income properly, or (3) who has
failed to certify to the Fund that he is not subject to backup withholding or
that he is an "exempt recipient."

     The foregoing general discussion of federal income tax consequences is
based on the Code and the regulations issued thereunder as in effect on the date
of this Statement of Additional Information. Future legislative or
administrative changes or court decisions may significantly change the
conclusions expressed herein, and any such changes or decisions may have a
retroactive effect with respect to the transactions contemplated herein.

     Although the Fund expects to qualify as a "regulated investment company"
and to be relieved of all or substantially all federal income taxes, depending
upon the extent of its activities in states and localities in which its offices
are maintained, in which its agents or independent contractors are located or in
which it is otherwise deemed to be conducting business, the Fund may be subject
to the tax laws of such states or localities.

                                      -27-
<PAGE>
 
                             DESCRIPTION OF SHARES

     RBB has authorized capital of thirty billion shares of Common Stock, $.001
par value per share, of which 18.326 billion shares are currently classified in
97 classes as follows: 100 million shares are classified as Class A Common Stock
(Growth & Income), 100 million shares are classified as Class B Common Stock,
100 million shares are classified as Class C Common Stock (Balanced), 100
million shares are classified as Class D Common Stock (Tax-Free), 500 million
shares are classified as Class E Common Stock (Money), 500 million shares are
classified as Class F Common Stock (Municipal Money), 500 million shares are
classified as Class G Common Stock (Money), 500 million shares are classified as
Class H Common Stock (Municipal Money), 1 billion five hundred million shares
are classified as Class I Common Stock (Money), 500 million shares are
classified as Class J Common Stock (Municipal Money), 500 million shares are
classified as Class K Common Stock (Government Money), 1,500 million shares are
classified as Class L Common Stock (Money), 500 million shares are classified as
Class M Common Stock (Municipal Money), 500 million shares are classified as
Class N Common Stock (Government Money), 500 million shares are classified as
Class O Common Stock (N.Y. Money), 100 million shares are classified as Class P
Common Stock (Government), 100 million shares are classified as Class Q Common
Stock, 500 million shares are classified as Class R Common Stock (Municipal
Money), 500 million shares are classified as Class S Common Stock (Government
Money), 500 million shares are classified as Class T Common Stock, 500 million
shares are classified as Class U Common Stock, 500 million shares are classified
as Class V Common Stock, 100 million shares are classified as Class W Common
Stock, 50 million shares are classified as Class X Common Stock, 50 million
shares are classified as Class Y Common Stock, 50 million shares are classified
as Class Z Common Stock, 50 million shares are classified as Class AA Common
Stock, 50 million shares are classified as Class BB Common Stock, 50 million
shares are classified as Class CC Common Stock, 100 million shares are
classified as Class DD Common Stock, 100 million shares are classified as Class
EE Common Stock, 50 million shares are classified as Class FF Common Stock (n/i
Numeric Investors Micro Cap), 50 million shares are classified as Class GG
Common Stock (n/i Numeric Investors Growth), 50 million shares are classified as
Class HH (n/i Numeric Investors Growth & Value), 100 million shares are
classified as Class II Common Stock, 100 million shares are classified as Class
JJ Common Stock, 100 million shares are classified as Class KK Common Stock, 100
million shares are classified as Class LL Common Stock, 100 million shares are
classified as Class MM Common Stock, 100 million shares are classified as Class
NN Common Stock, 100 million shares are classified as Class OO Common Stock, 100
million shares are classified as Class PP Common Stock, 100 million shares are
classified as Class QQ Common Stock (Boston Partners Institutional Large Cap),
100 million shares are classified as Class RR Common Stock (Boston Partners
Investor Large Cap), 100 million shares are classified as Class SS Common Stock
(Boston Partners Advisor Large Cap), 100 million shares are classified as Class
TT Common Stock (Boston Partners Investor Mid Cap), 100 million shares are
classified as Class UU Common Stock (Boston Partners Institutional Mid Cap), 100
million shares are classified as Class VV Common Stock (Boston Partners
Institutional Bond), 100 million shares are classified as Class WW Common Stock
(Boston Partners Investor Bond), 50 million shares are classified as Class XX
Common Stock (n/i Numeric Investors Larger Cap Value), 100 million shares are
classified as Class YY Common Stock (Schneider Capital Management Small Cap
Value), 100 million shares are classified as Class ZZ Common Stock,

                                      -28-
<PAGE>
 
100 million shares of Class AAA Common Stock, 100 million shares are classified
as Class BBB Common Stock, 100 million shares of Class CCC Common Stock, 100
million shares are classified as Class DDD Common Stock (Boston Partners
Institutional Micro Cap), 100 million shares are classified as Class EEE Common
Stock (Boston Partners Investors Micro Cap), 100 million shares are classified
as Class FFF Common Stock, 100 million shares are classified as Class GGG Common
Stock, 100 million shares are classified as Class HHH Common Stock, 100 million
shares are classified as Class III Common Stock (Boston Partners Institutional
Market Neutral), 100 million shares are classified as Class JJJ Common Stock
(Boston Partners Investor Market Neutral), 100 million shares are classified as
Class KKK Common Stock (Boston Partners Institutional Long-Short Equity) 100
million shares are classified as Class LLL common stock (Boston Partners
Investor Long-Short Equity), 100 million shares are classified as Class MMM
Common Stock (n/i Small Cap Value), 1.5 billion shares are classified as Class
Janney Money Common Stock (Money), 200 million shares are classified as Class
Janney Municipal Money Common Stock (Municipal Money), 200 million shares are
classified as Class Janney Government Money Common Stock (Government Money), 100
million shares are classified as Class Janney N.Y. Municipal Money Common Stock
(N.Y. Money), 700 million shares are classified as Class Select Common Stock
(Money), 1 million shares are classified as Class Beta 2 Common Stock (Municipal
Money), 1 million shares are classified as Class Beta 3 Common Stock (Government
Money), 1 million shares are classified as Class Beta 4 Common Stock (N.Y.
Money), 700 million shares are classified as Principal Class Money Common Stock
(Money), 1 million shares are classified as Gamma 2 Common Stock (Municipal
Money), 1 million shares are classified as Gamma 3 Common Stock (Government
Money), 1 million shares are classified as Gamma 4 Common Stock (N.Y. Money), 1
million shares are classified as Delta 1 Common Stock (Money), 1 million shares
are classified as Delta 2 Common Stock (Municipal Money), 1 million shares are
classified as Delta 3 Common Stock (Government Money), 1 million shares are
classified as Delta 4 Common Stock (N.Y. Money), 1 million shares are classified
as Epsilon 1 Common Stock (Money), 1 million shares are classified as Epsilon 2
Common Stock (Municipal Money), 1 million shares are classified as Epsilon 3
Common Stock (Government Money), 1 million shares are classified as Epsilon 4
Common Stock (N.Y. Money), 1 million shares are classified as Zeta 1 Common
Stock (Money), 1 million shares are classified as Zeta 2 Common Stock (Municipal
Money), 1 million shares are classified as Zeta 3 Common Stock (Government
Money), 1 million shares are classified as Zeta 4 Common Stock (N.Y. Money), 1
million shares are classified as Eta 1 Common Stock (Money), 1 million shares
are classified as Eta 2 Common Stock (Municipal Money), 1 million shares are
classified as Eta 3 Common Stock (Government Money), 1 million shares are
classified as Eta 4 Common Stock (N.Y. Money), 1 million shares are classified
as Theta 1 Common Stock (Money), 1 million shares are classified as Theta 2
Common Stock (Municipal Money), 1 million shares are classified as Theta 3
Common Stock (Government Money), and 1 million shares are classified as Theta 4
Common Stock (N.Y. Money). Shares of the Class MMM Common Stock constitute the
N/I NUMERIC INVESTORS Small Cap Value Fund. Under RBB's charter, the Board of
Directors has the power to classify or reclassify any unissued shares of Common
Stock from time to time.

     The classes of Common Stock have been grouped into fifteen separate
"families":  the RBB Family, the Cash Preservation Family, the Sansom Street
Family, the Bedford Family, the Principal (Gamma) Family, the Janney Montgomery
Scott Money Family, the Select (Beta) Family, the Schneider Capital Management
Family, the N/I NUMERIC INVESTORS family of funds, 

                                      -29-
<PAGE>
 
the Boston Partners Family, the Delta Family, the Epsilon Family, the Zeta
Family, the Eta Family and the Theta Family. The RBB Family represents interests
in the Government Securities Portfolio; the Cash Preservation Family represents
interests in the Money Market and Municipal Money Market Portfolios; the Sansom
Street Family represents interests in the Money Market, Municipal Money Market
and Government Obligations Money Market Portfolios; the Bedford Family
represents interests in the Money Market, Municipal Money Market, Government
Obligations Money Market and New York Municipal Money Market Portfolios; the N/I
NUMERIC INVESTORS family of funds represents interests in five non-money market
portfolios; the Boston Partners Family represents interests in five non-money
market portfolios; the Schneider Capital Management Family represents interests
in one non-money market portfolio; the Janney Montgomery Scott Family, the
Select (Beta) Family, the Principal (Gamma) Family and the Delta, Epsilon, Zeta,
Eta and Theta Families represent interests in the Money Market, Municipal Money
Market, Government Obligations Money Market and New York Municipal Money Market
Funds.

                 ADDITIONAL INFORMATION CONCERNING FUND SHARES

     RBB does not currently intend to hold annual meetings of shareholders
except as required by the 1940 Act or other applicable law. RBB's amended By-
Laws provide that shareholders collectively owning at least ten percent of the
outstanding shares of all classes of Common Stock of RBB have the right to call
for a meeting of shareholders to consider the removal of one or more directors.
To the extent required by law, RBB will assist in shareholder communication in
such matters.

     Holders of shares of each class of RBB will vote in the aggregate and not
by class on all matters, except where otherwise required by law. Further,
shareholders of RBB will vote in the aggregate and not by portfolio except as
otherwise required by law or when the Board of Directors determines that the
matter to be voted upon affects only the interests of the shareholders of a
particular portfolio. Rule 18f-2 under the 1940 Act provides that any matter
required to be submitted by the provisions of such Act or applicable state law,
or otherwise, to the holders of the outstanding voting securities of an
investment company such as RBB shall not be deemed to have been effectively
acted upon unless approved by the holders of a majority of the outstanding
voting securities, as defined in the 1940 Act, of each portfolio affected by the
matter. Rule 18f-2 further provides that a portfolio shall be deemed to be
affected by a matter unless it is clear that the interests of each portfolio in
the matter are identical or that the matter does not affect any interest of the
portfolio. Under the Rule, the approval of an investment advisory agreement or
any change in a fundamental investment policy would be effectively acted upon
with respect to a portfolio only if approved by the holders of a majority of the
outstanding voting securities (as defined by the 1940 Act) of such portfolio.
However, the Rule also provides that the ratification of the selection of
independent public accountants, the approval of principal underwriting contracts
and the election of directors are not subject to the separate voting
requirements and may be effectively acted upon by shareholders of an investment
company voting without regard to portfolio.

                                      -30-
<PAGE>
 
  Notwithstanding any provision of Maryland law requiring a greater vote of
shares of RBB's common stock (or of any class voting as a class) in connection
with any corporate action, unless otherwise provided by law or by RBB's Charter,
RBB may take or authorize such action upon the favorable vote of the holders of
more than 50% of all of the outstanding shares of Common Stock entitled to vote
on the matter voting without regard to class (or portfolio).  The name "N/I
NUMERIC INVESTORS" may be used in the name of other portfolios managed by
Numeric.


                                 MISCELLANEOUS

  COUNSEL.  The law firm of Drinker Biddle & Reath LLP, 1100 Philadelphia
National Bank Building, 1345 Chestnut Street, Philadelphia, Pennsylvania 19107-
3496, serves as counsel to RBB and RBB's non-interested directors.

  INDEPENDENT ACCOUNTANTS.  PricewaterhouseCoopers LLP, 2400 Eleven Penn Center,
Philadelphia, Pennsylvania 19103, serves as RBB's independent accountants.

  CONTROL PERSONS.  As of  August 28, 1998, to RBB's knowledge, the following
named persons at the addresses shown below owned of record approximately 5% or
more of the total outstanding shares of the class of RBB indicated below.  See
"Description of Shares" above.  RBB does not know whether such persons also
beneficially own such shares.


<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
         FUND NAME                 SHAREHOLDER NAME AND                PERCENTAGE OF 
                                         ADDRESS                         FUND HELD
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                       <C>
BEA INT'L EQUITY-            Employees Ret Plan Marshfield Clini              7.23%
INSTITUTIONAL                1000 N. Oak Avenue
                             Marshfield, WI 54449-5772
- -------------------------------------------------------------------------------------------------
                             Indiana University Foundation                    5.05%
                             Attn: Walter L. Koon, Jr.
                             P.O. Box 500
                             Bloomington, IN 47402-0500
- -------------------------------------------------------------------------------------------------
BEA EMERGING MARKETS         Wachovia Bank North Carolina                    47.78%
EQUITY-INSTITUTIONAL         Trust Carolina Power & Light Co.
                             Supplemental Retirement Trust
                             P.O. Box 3073
                             301 N. Main Street, MC NC 31057
                             Winston-Salem, NC 27101-3819
- -------------------------------------------------------------------------------------------------
                             Clariden Bank                                    6.93%
                             Clariden Str. 26
                             CH-8002 Zurich
                             Switzerland
- -------------------------------------------------------------------------------------------------
                             National Academy of Sciences                     5.36%
                             2101 Constitution Ave. NW
                             Washington, DC 20418-0006
- -------------------------------------------------------------------------------------------------
</TABLE> 

                                      -31-
<PAGE>
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
         FUND NAME                 SHAREHOLDER NAME AND                PERCENTAGE OF 
                                         ADDRESS                         FUND HELD
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                       <C>
                             Arkansas Public Emp. Retirement Syst.             32.00%
                             124 W. Capitol Ave.
                             Little Rock, AR 72201-3704
- -------------------------------------------------------------------------------------------------
BEA LONG-SHORT MARKET        Michael A. Wall TTEE                              95.80%
 NEUTRAL-INSTITUTIONAL       Michael A. Wall Trust
                             U/A DTD 12/29/1997
                             P.O. Box 4579
                             Jackson, WY   83001-4579
- -------------------------------------------------------------------------------------------------
BEA SELECT ECONOMIC VALUE    Patterson & Co.                                   91.54%
 EQUITY-INSTITUTIONAL        P.O. Box 7829
                             Philadelphia, PA 19101-7829
- -------------------------------------------------------------------------------------------------
                             BEA Associates                                     5.56%
                             FAO Pension Trust
                             153 E. 53rd St.
                             New York, NY  10022-4611
- -------------------------------------------------------------------------------------------------
BEA U.S. CORE EQUITY         Werner & Pfleiderer Pension Plan                   8.91%
- -INSTITUTIONAL               Employees
                             663 E. Crescent Ave.
                             Ramsey, NJ 07446-1287
- -------------------------------------------------------------------------------------------------
                             Credit Suisse Private Banking Dividend             8.98%
                             Reinvest Plan
                             C/o Credit Suisse Pvt Bkg
                             12 E. 49th St., 40th Floor
                             New York, NY 10017-1028
- -------------------------------------------------------------------------------------------------
                             Washington Hebrew Congregation                    16.18%
                             3935 Macomb St., NW
                             Washington, DC 20016-3799
- -------------------------------------------------------------------------------------------------
                             Fleet National Bank Trst.                          8.02%
                             Hospital St. Raphael Malpractice
                             Attn: 1958875010
                             P.O. Box 92800
                             Rochester, NY 14692-8900
- -------------------------------------------------------------------------------------------------
                             Patterson & Co.                                   32.75%
                             P.O. Box 7829
                             Philadelphia, PA 19101-7829
- -------------------------------------------------------------------------------------------------
                             FTC & Co.                                          6.14%
                             Attn. Datalynx # House Acct.
                             P.O. Box 173736
                             Denver, CO  80217-3736
- -------------------------------------------------------------------------------------------------
                             Sema & Co.                                         5.14%
                             12 E. 49th St. -  Fl. 41
                             New York, NY  10017-1028
- -------------------------------------------------------------------------------------------------
</TABLE> 

                                      -32-
<PAGE>
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
         FUND NAME                 SHAREHOLDER NAME AND                PERCENTAGE OF 
                                         ADDRESS                         FUND HELD
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                       <C>
BEA U.S. CORE FIXED INCOME   The Northern Trust Company TTEE                  12.80%
 INSTITUTIONAL               Uniroyal Holdings Bond Fund
                             c/o Uniroyal Holding Inc.
                             70 Great Hill Road
                             Naugatuck, CT 06770-2224
- -------------------------------------------------------------------------------------------------
                             Winifred Masterson Burke Foundation               6.17%
                             785 Mamaroneck Ave.
                             White Plains, NY 10605-2593
- -------------------------------------------------------------------------------------------------
                             New England UFCW & Employers' Pension            11.86%
                             Fund Board of Trustees
                             161 Forbes Rd, Ste. 201
                             Braintree, MA 02184-2606
- -------------------------------------------------------------------------------------------------
BEA STRATEGIC GLOBAL FIXED   Sunkist Master Trust                             52.73%
 INCOME FUND                 14130 Riverside Dr.
                             Sherman Oaks, CA 91423-2392
- -------------------------------------------------------------------------------------------------
                             Patterson & Co.                                  37.70%
                             P.O. Box 7829
                             Philadelphia, PA 19101-7829
- -------------------------------------------------------------------------------------------------
                             State St. Bank & Trust TTEE                       5.48%
                             Fenway Holdings LLC Master Trust
                             P.O. Box 470
                             Boston, MA 02102-0470
- -------------------------------------------------------------------------------------------------
BEA HIGH YIELD-              Carl F Besenbach                                 18.35%
 INSTITUTIONAL               Trst Michelin North America Inc.
                             Master Trust
                             P.O. Box 19001
                             Greenville, SC 29602-9001
- -------------------------------------------------------------------------------------------------
                             Southdown Inc. Pension Pl                         9.61%
                             Mac & Co A/C SDIF8575302
                             Mutual Fund Operations
                             P.O. Box 3l98
                             Pittsburgh, PA  15230-3198
- -------------------------------------------------------------------------------------------------
                             Edward J. Demske TTEE                             5.54%
                             Miami University Foundation
                             202 Roudebush Hall
                             Oxford, OH 45056
- -------------------------------------------------------------------------------------------------
                             Fidelity Investments Institutional               16.89%
                             Operations Co. Inc. as Agent for
                             Certain Employee Benefits Plan
                             100 Magellan Way #KWIC
                             Covington, KY 41015-1987
- -------------------------------------------------------------------------------------------------
                             MAC & CO A/C CSBF8605082                          5.18%
                             Mutual Fund Operations
- -------------------------------------------------------------------------------------------------
</TABLE> 

                                      -33-
<PAGE>
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
         FUND NAME                 SHAREHOLDER NAME AND                PERCENTAGE OF 
                                         ADDRESS                         FUND HELD
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                       <C>
                             P.O. Box 3198
                             Pittsburgh, PA 15230-3198
- -------------------------------------------------------------------------------------------------
BEA MUNI BOND-               Arnold Leon                                      12.59%
INSTITUTIONAL                c/o Fiduciary Trust Company
                             P.O. Box 3199 Church Street Station
                             New York, NY 10008-3199
- -------------------------------------------------------------------------------------------------
                             William A. Marquard                              36.03%
                             2199 Maysville Rd.
                             Carlisle, KY 40311-9716
- -------------------------------------------------------------------------------------------------
                             Leo Bogart                                        5.21%
                             135 Central Park West 9N
                             New York, NY 10023-2465
- -------------------------------------------------------------------------------------------------
                             Howard Isermann                                   8.86%
                             9 Tulane Dr.
                             Livingston, NJ 07039-6212
- -------------------------------------------------------------------------------------------------
BEA INT'L EQUITY ADVISOR     TRANSCORP                                         9.45%
                             FBO William E Burns
                             P.O. Box 6535
                             Englewood, CO  80155-6535
- -------------------------------------------------------------------------------------------------
                             Charles Schwab & Co.                              8.53%
                             Special Custody Account for the
                             Exclusive Benefit of Customers
                             101 Montgomery Street
                             San Francisco, CA 94104-4122
- -------------------------------------------------------------------------------------------------
                             Bob & Co.                                        76.46%
                             P.O. Box 1809
                             Boston, MA 02105-1809
- -------------------------------------------------------------------------------------------------
</TABLE>

                                      -34-
<PAGE>
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
         FUND NAME                 SHAREHOLDER NAME AND                PERCENTAGE OF 
                                         ADDRESS                         FUND HELD
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                       <C>
BEA EMERGING MARKETS         SEMA & Co.                                       97.75%
 EQUITY-ADVISOR              12E 49th St. Fl. 41
                             New York, NY 10017-1028
- -------------------------------------------------------------------------------------------------
BEA GLOBAL TELE-             E. M. Warburg Pincus & Co. Inc.                  18.48%
 COMMUNICATIONS ADVISOR      Attn: Sandra Correale
                             466 Lexington Ave.
                             New York, NY 10017-3140
- -------------------------------------------------------------------------------------------------
                             Charles Schwab & Co.                             14.52%
                             Special Custody Account for the
                             Exclusive Benefit of Customers
                             101 Montgomery St.
                             San Francisco, CA 94104-4122
- -------------------------------------------------------------------------------------------------
                             William W. Priest                                 5.03%
                             2 E. 70th St. #5
                             New York, NY  10021-4913
- -------------------------------------------------------------------------------------------------
                             FTC & Co.                                        25.50%
                             Attn: DATALYNX #148
                             P.O. Box 173736
                             Denver, CO 80217-3736
- -------------------------------------------------------------------------------------------------
BEA HIGH YIELD-ADVISOR       Charles Schwab & Co.                             83.14%
                             Special Custody Account for the
                             Exclusive Benefit of Customers
                             101 Montgomery St.
                             San Francisco, CA 94104-4122
- -------------------------------------------------------------------------------------------------
                             Richard A. Wilson TTEE                           14.19%
                             E. Francis Wilson TTEE
                             The Wilson Family Trust
                             U/A 11/1/95
                             7612 March Ave.
                             West Hills, CA  91304-5232
- -------------------------------------------------------------------------------------------------
CASH PRESERVATION MONEY      Jewish Family and Children's Agency of           47.10%
 MARKET                      Phil Capital Campaign
                             Attn: S. Ramm
                             1610 Spruce Street
                             Philadelphia, PA 19103
- -------------------------------------------------------------------------------------------------
                             Marian E. Kunz                                   12.60%
                             52 Weiss Ave.
                             Flourtown, PA 19031
- -------------------------------------------------------------------------------------------------
</TABLE>

                                      -35-
<PAGE>
 
<TABLE>
<CAPTION> 
- -------------------------------------------------------------------------------------------------------
FUND NAME                     SHAREHOLDER NAME AND                                        PERCENTAGE OF 
                                    ADDRESS                                                 FUND HELD
- -------------------------------------------------------------------------------------------------------
<S>                           <C>                                                         <C>            
SAMSON STREET MONEY MARKET    Saxon and Co.                                                  78.00%
                              FBO Paine Webber                                                    
                              A/C 32 32 400 4000038                                               
                              P.O. Box 7780 1888                                                  
                              Phila., PA 19182                                                    
- ------------------------------------------------------------------------------------------------------
                              Wasner & Co. for Account of                                    21.20%
                              Paine Webber and Managed Assets Sundry                              
                              Holdings                                                            
                              Attn: Joe Domizio                                                   
                              76 A 260 ABC 200 Stevens Drive                                      
                              Lester, PA 19113                                                    
- ------------------------------------------------------------------------------------------------------
CASH PRESERVATOIN             Gary L. Lange                                                  36.70%
MUNICIPAL MONEY MARKET        and Susan D. Lange                                                  
                              JT TEN                                                              
                              1354 Shady Knoll Ct.                                                
                              Longwood, FL 32750                                                  
- ------------------------------------------------------------------------------------------------------
                              Andrew Diederich                                                6.70%
                              Doris Diederich                                                     
                              JT TEN                                                              
                              1003 Lindeman                                                       
                              Des Peres, MO 63131                                                 
- ------------------------------------------------------------------------------------------------------
                              Kenneth Farwell                                                12.10%
                              and Valerie Farwell                                                 
                              3854 Sullivan                                                       
                              St. Louis, MO 63107                                                 
- ------------------------------------------------------------------------------------------------------
                              Gwendolyn Haynes                                                5.40%
                              2757 Geyer                                                          
                              St. Louis, MO 63104                                                 
- ------------------------------------------------------------------------------------------------------
                              Emil R. Hunter and                                              7.60%
                              Mary J. Hunter JT TEN                                               
                              428 W. Jefferson                                                    
                              Kirkwood, MO 63122                                                  
- ------------------------------------------------------------------------------------------------------
N/I MICRO CAP FUND            Charles Schwab & Co. Inc                                       14.00%
                              Special Custody Account for the                                     
                              Exclusive Benefit of Customers                                      
                              Attn: Mutual Funds                                                  
                              101 Montgomery St.                                                  
                              San Francisco, CA 94104                                             
- ------------------------------------------------------------------------------------------------------
</TABLE>

                                      -36-
<PAGE>
 
<TABLE>
<CAPTION> 
- -------------------------------------------------------------------------------------------------------
FUND NAME                     SHAREHOLDER NAME AND                                        PERCENTAGE OF 
                                    ADDRESS                                                 FUND HELD
- -------------------------------------------------------------------------------------------------------
<S>                           <C>                                                         <C>           
                              Janis Claflin, Bruce Fetzer and                                 5.20%
                              Winston Franklin, Robert Lehman Trst                                
                              the John E. Fetzer Institute, Inc.                                  
                              U/A DTD 06-1992                                                     
                              Attn: Christina Adams                                               
                              9292 West KL Ave.                                                   
                              Kalamazoo, MI 49009                                                 
- -------------------------------------------------------------------------------------------------------
                              Public Inst. For Social Security                                7.30%
                              1001 19th St., N. 16th Flr.                                         
                              Arlington, VA 22209                                                 
- -------------------------------------------------------------------------------------------------------
                              Portland General Holdings Inc.                                 16.60%
                              DTD 01/29/90                                                        
                              Attn: William J. Valach                                             
                              121 S.W. Salmon St.                                                 
                              Portland, OR 97202                                                  
- -------------------------------------------------------------------------------------------------------
                              State Street Bank and Trust Company                             8.50%
                              FBO Yale Univ. Ret. Pln for Staff Emp                               
                              State Street Bank & Tr Co. Master Tr.                               
                              Div                                                                 
                              Attn: Kevin Sutton                                                  
                              Solomon Williard Bldg. One Enterprise                               
                              Dr.                                                                 
                              North Quincy, MA 02171                                              
- -------------------------------------------------------------------------------------------------------
N/I GROWTH FUND               Charles Schwab & Co. Inc                                       18.60%
                              Special Custody Account for the                                     
                              Exclusive Benefit of Customers                                      
                              Attn: Mutual Funds                                                  
                              101 Montgomery St.                                                  
                              San Francisco, CA 94104                                             
- -------------------------------------------------------------------------------------------------------
                              Citibank North America Inc.                                    20.60%
                              Trst Sargent & Lundy Retirement Trust                               
                              DTD 06/01/96                                                        
                              Mutual Fund Unit                                                    
                              Bld. B Floor 1 Zone 7                                               
                              3800 Citibank Center Tampa                                          
                              Tampa, FL 33610-9122                                                
- -------------------------------------------------------------------------------------------------------
                              U.S. Equity Investment Portfolio LP                             6.20%
                              1001 N. US Hwy One Suite 800                                        
                              Jupiter, FL 33477                                                   
- -------------------------------------------------------------------------------------------------------
</TABLE> 

                                      -37-
<PAGE>
 
<TABLE>
<CAPTION> 
- -------------------------------------------------------------------------------------------------------
FUND NAME                     SHAREHOLDER NAME AND                                        PERCENTAGE OF 
                                    ADDRESS                                                 FUND HELD
- -------------------------------------------------------------------------------------------------------
<S>                           <C>                                                         <C>            
                              Union Bank of California                                        5.20%
                              Trst Sunkist Growers-Match-Svgspln                                  
                              Trst No. 610001154-03                                               
                              Mutual Funds Dept. P.O. Box 109                                     
                              San Diego, CA 92112                                                 
- -------------------------------------------------------------------------------------------------------
N/I GROWTH AND VALUE FUND     Charles Schwab & Co. Inc.                                      21.80%
                              Special Custody Account for the                                     
                              Exclusive Benefit of Customers                                      
                              Attn: Mutual Funds                                                  
                              101 Montgomery St.                                                  
                              San Francisco, CA 94104                                             
- -------------------------------------------------------------------------------------------------------
                              The John E. Fetzer Institute Inc.                               7.80%
                              Attn: Christina Adams                                               
                              9292 W. KL Ave.                                                     
                              Kalamazoo, MI 49009                                                 
- -------------------------------------------------------------------------------------------------------
                              Bankers Trust Cust Pge-Enron Foundation                         5.40%
                              Attn: Procy Fernandez                                               
                              300 S. Grand Ave. 40th Floor                                        
                              Los Angeles, CA 90071                                               
- -------------------------------------------------------------------------------------------------------
N/I LARGER CAP VALUE FUND     Charles Schwab & Co. Inc                                       18.60%
                              Special Custody Account for the                                     
                              Exclusive Benefit of Customers                                      
                              Attn: Mutual Funds                                                  
                              101 Montgomery St.                                                  
                              San Francisco, CA 94104                                             
- -------------------------------------------------------------------------------------------------------
                              Bank of America NT & SA                                        17.90%
                              FBO Community Hospital Central Cal Pn Pl                            
                              A/C 10-35-155-2048506                                               
                              Attn: Mutual Funds 38615                                            
                              P.O. Box 513577                                                     
                              Los Angeles, CA 90051                                               
- -------------------------------------------------------------------------------------------------------
                              The John E. Fetzer Institute, Inc.                             47.40%
                              Attn. Christina Adams                                               
                              9292 W. KL Ave.                                                     
                              Kalamazoo, MI 49009                                                 
- -------------------------------------------------------------------------------------------------------
BOSTON PARTNERS LARGE CAP     Dr. Janice B. Yost                                             16.90%
 FUND INST SHARES             Trst Mary Black Foundation Inc.                                     
                              Bell Hill - 945 E. Main St.                                          
                              Spartanburg, SC 29302                                               
                                                                                                  
- -------------------------------------------------------------------------------------------------------
</TABLE>

                                      -38-
<PAGE>
 
<TABLE>
<CAPTION> 
- ---------------------------------------------------------------------------------------------------------
FUND NAME                     SHAREHOLDER NAME AND                                        PERCENTAGE OF 
                                    ADDRESS                                                 FUND HELD
- ---------------------------------------------------------------------------------------------------------
<S>                           <C>                                                         <C>            
                              Saxon And Co.                                                   6.20%
                              FBO UJF Equity Funds                                                
                              AC 10-01-001-0578481                                                
                              P.O. Box 7780-1888                                                  
                              Philadelphia, PA 19182                                              
- ---------------------------------------------------------------------------------------------------------
                              Irving Fireman's Relief & Ret Fund                              7.60%
                              Attn: Edith Auston                                                  
                              825 W. Irving Blvd.                                                 
                              Irvin, TX 75060                                                     
- ---------------------------------------------------------------------------------------------------------
                              Wells Fargo Bank                                                6.80%
                              Trst Stoel Rives                                                    
                              Tr 008125                                                           
                              P.O. Box 9800                                                       
                              Calabasas, CA 91308                                                 
- ---------------------------------------------------------------------------------------------------------
                              James B. Beam                                                   6.40%
                              Trst World Publishing Co Pft Shr Trust                              
                              P.O. Box 1511                                                       
                              Wenatchee, WA 98807                                                
- ---------------------------------------------------------------------------------------------------------
                              Swanee Hunt and Charles Ansbacher                               8.20%
                              Trst The Swanee Hunt Family Fund                                    
                              C/o Elizabeth Alberti                                              
                              168 Brattle St.                                                     
                              Cambridge, MA 02138                                                 
- ---------------------------------------------------------------------------------------------------------
                              Swanee Hunt and Charles Ansbacher                               6.30%
                              Trst The Hunt Alternatives Fund                                    
                              C/o Elizabeth Alberti                                              
                              168 Brattle St.                                                     
                              Cambridge, MA 02138                                                 
- ---------------------------------------------------------------------------------------------------------
                              Samuel Gary and Ronald Williams                                 7.20%
                              And David Younggren                                                 
                              Trst Gary Tax Advantaged PRO+ PSP                                   
                              370 17th St. Suite 5300                                             
                              Denver, CO 80202                                                    
- ---------------------------------------------------------------------------------------------------------
BOSTON PARTNERS LARGE CAP     National Financial Services Corp.                              17.60%
 FUND INVESTOR SHARES         For the Exclusive Bene of Our Customers                            
                              Attn: Mutual Funds 5th Floor                                        
                              200 Liberty St I World Financial Center                             
                              New York, NY 10281                                                  
- ---------------------------------------------------------------------------------------------------------
</TABLE>

                                      -39-
<PAGE>
 
<TABLE>
<CAPTION> 
- -------------------------------------------------------------------------------------------------------
FUND NAME                     SHAREHOLDER NAME AND                                        PERCENTAGE OF 
                                    ADDRESS                                                 FUND HELD
- -------------------------------------------------------------------------------------------------------
<S>                           <C>                                                         <C>            
                              Charles Schwab & Co. Inc.                                      74.50%
                              Special Custody Account for the Benefit                             
                              of Customers                                                        
                              Attn: Mutual Funds                                                  
                              101 Montgomery St.                                                  
                              San Francisco, CA 94104                                             
- -------------------------------------------------------------------------------------------------------
BOSTON PARTNERS MID CAP       Donaldson Lufkin & Jenrette                                    11.50%
 VALUE FUND INST. SHARES      Securities Corporation                                              
                              Attn: Mutual Funds                                                  
                              P.O. Box 2052                                                       
                              Jersey City, NJ 07303                                               
- -------------------------------------------------------------------------------------------------------
                              North American Trst. Co.                                        5.80%
                              FBO Cooley Godward                                                  
                              P.O. Box 84419                                                      
                              San Diego, CA 92138                                                 
- -------------------------------------------------------------------------------------------------------
                              John Carroll University                                         6.70%
                              20700 N. Park Blvd.                                                 
                              University Heights, OH 44118                                        
- -------------------------------------------------------------------------------------------------------
                              MAC & CO.                                                       9.50%
                              A/C BPHF 3006002                                                    
                              Mutual Funds Operations                                             
                              P.O. Box 3198                                                       
                              Pittsburgh, PA 15230-3198                                           
- -------------------------------------------------------------------------------------------------------
                              ISTCO                                                           6.80%
                              P.O. Box 523                                                        
                              Belleville, IL 62222-0523                                           
- -------------------------------------------------------------------------------------------------------
                              Coastal Insurance Enterprises Inc.                              8.70%
                              Attn: Chris Baldwin                                                 
                              P.O. Box 240429                                                     
                              Montgomery AL 36124                                                 
- -------------------------------------------------------------------------------------------------------
                              Healthcare Workers Compensation Fund                            6.00%
                              Attn: Chris Baldwin                                                 
                              P.O. Box 240429                                                     
                              Montgomery AL 36124                                                 
- -------------------------------------------------------------------------------------------------------
BOSTON PARTNERS MID CAP       National Financial Svcs Corp. for                              12.50%
 VALUE FUND INV SHARES        Exclusive Bene of Our Customers Sal                                 
                              Vella                                                               
                              200 Liberty St.                                                     
                              New York, NY 10281                                                  
- -------------------------------------------------------------------------------------------------------
</TABLE>

                                      -40-
<PAGE>
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
                                   SHAREHOLDER NAME AND                         PERCENTAGE OF 
         FUND NAME                       ADDRESS                                   FUND HELD
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                                <C>
                             Charles Schwab & Co. Inc.                                46.00%
                             Special Custody Account for Benefit of
                             Customers
                             Attn: Mutual Funds
                             101 Montgomery St.
                             San Francisco, CA 94104
- -------------------------------------------------------------------------------------------------
                             George B. Smithy, Jr                                      5.20%
                             38 Greenwood Rd.
                             Wellesley, MA 02181
- -------------------------------------------------------------------------------------------------
                             Jupiter & Co.                                             6.00%
                             c/o Investors Bank
                             P.O. Box 9130 FPG 90
                             Boston, MA 02010
- -------------------------------------------------------------------------------------------------
BOSTON PARTNERS              Boston Partners Asset Mgmt LP                            35.10%
BOND FUND                    One Financial Center 43rd Fl.
INSTITUTIONAL                Boston, MA 02111
SHARES
- -------------------------------------------------------------------------------------------------
                             Chiles Foundation                                        16.70%
                             111 S.W. Fifth Ave.
                             4010 US Bancorp Tower
                             Portland, OR 97204
- -------------------------------------------------------------------------------------------------
                             The Roman Catholic Diocese of                            39.10%
                             Raleigh, NC
                             General Endowment
                             715 Nazareth St.
                             Raleigh, NC 27606
- -------------------------------------------------------------------------------------------------
                             The Roman Catholic Diocese of                             9.00%
                             Raleigh, NC
                             Clergy Trust
                             715 Nazareth St.
                             Raleigh, NC 27606
- -------------------------------------------------------------------------------------------------
BOSTON PARTNERS              Charles Schwab & Co. Inc                                 77.00%
BOND FUND INVESTOR           Special Custody Account for Benefit of
SHARES                       Customers
                             Attn: Mutual Funds
                             101 Montgomery St.
                             San Francisco, CA 94104
- -------------------------------------------------------------------------------------------------
                             Donaldson Lufkin & Jenrette                               5.10%
                             Securities Corporation
                             Attn:  Mutual Funds
                             P.O. Box 2052
                             Jersey City, NJ 07303
- -------------------------------------------------------------------------------------------------
</TABLE>

                                      -41-
<PAGE>
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
                                SHAREHOLDER NAME AND                          PERCENTAGE OF
         FUND NAME                    ADDRESS                                   FUND HELD      
- -------------------------------------------------------------------------------------------------
<S>                          <C>                                              <C>
                             Stephen W. Hamilton                                   15.30%
                             17 Lakeside Ln
                             N. Barrington, IL 60010
- -------------------------------------------------------------------------------------------------
BOSTON PARTNERS              Desmond J. Heathwood                                   6.80%
MICRO CAP VALUE              41 Chestnut St.
FUND- INSTITUTIONAL          Boston, MA 02108
SHARES
- -------------------------------------------------------------------------------------------------
                             Boston Partners Asset Management LP                   67.70%
                             One Financial Center
                             43rd Floor
                             Boston, MA 02111
- -------------------------------------------------------------------------------------------------
                             Wayne Archambo                                         6.80%
                             42 DeLopa Circle
                             Westwood, MA 02090
- -------------------------------------------------------------------------------------------------
                             David M. Dabora                                        6.80%
                             11 White Plains Ct.
                             San Anselmo, CA 94960
- -------------------------------------------------------------------------------------------------
BOSTON PARTNERS              National Financial Services Corp.                     34.90%
MICRO CAPVALUE               For the Exclusive Bene of our Customers
FUND- INVESTOR               Attn. Mutual Funds 5th Floor
SHARES                       200 Liberty St.
                             1 World Financial Center
                             New York, NY 10281
- -------------------------------------------------------------------------------------------------
                             Scott J. Harrington                                   62.10%
                             54 Torino Ct.
                             Danville, CA 94526
- -------------------------------------------------------------------------------------------------
</TABLE>


     As of the same date, directors and officers as a group owned less than one
percent of the shares of the Fund.

     BANKING LAWS. Banking laws and regulations currently prohibit a bank
holding company registered under the Federal Bank Holding Company Act of 1956 or
any bank or non-bank affiliate thereof from sponsoring, organizing, controlling
or distributing the shares of a registered, open-end investment company
continuously engaged in the issuance of its shares, and prohibit banks generally
from underwriting securities, but such banking laws and regulations do not
prohibit such a holding company or affiliate or banks generally from acting as
investment adviser, administrator, transfer agent or custodian to such an
investment company, or from purchasing shares of such a company as agent for and
upon the order of customers. BIMC, PNC Bank and other institutions that are
banks or bank affiliates are subject to such banking laws and regulations.

                                      -42-
<PAGE>
 
     BIMC and PNC Bank believe they may perform the services for the Fund
contemplated by their respective agreements with RBB without violation of
applicable banking laws or regulations.  It should be noted, however, that there
have been no cases deciding whether bank and non-bank subsidiaries of a
registered bank holding company may perform services comparable to those that
are to be performed by these companies, and future changes in either federal or
state statutes and regulations relating to permissible activities of banks and
their subsidiaries or affiliates, as well as further judicial or administrative
decisions or interpretations of present and future statutes and regulations,
could prevent these companies from continuing to perform such services for RBB.
If such were to occur, it is expected that the Board of Directors would
recommend that RBB enter into new agreements or would consider the possible
termination of RBB.  Any new advisory or sub-advisory agreement would normally
be subject to shareholder approval.  It is not anticipated that any change in
RBB's method of operations as a result of these occurrences would affect its net
asset value per share or result in a financial loss to any shareholder.

     SHAREHOLDER APPROVALS. As used in this Statement of Additional Information
and in the Prospectuses, "shareholder approval" and a "majority of the
outstanding shares" of a class, series or Portfolio means, with respect to the
approval of an investment advisory agreement, a distribution plan or a change in
a fundamental investment limitation, the lesser of (1) 67% of the shares of the
particular class, series or Portfolio represented at a meeting at which the
holders of more than 50% of the outstanding shares of such class, series or
Portfolio are present in person or by proxy, or (2) more than 50% of the
outstanding shares of such class, series or Portfolio.

                                      -43-
<PAGE>
 
                                  APPENDIX A
                                  ----------

COMMERCIAL PAPER RATINGS
- ------------------------

     A Standard & Poor's ("S&P") commercial paper rating is a current assessment
of the likelihood of timely payment of debt having an original maturity of no
more than 365 days. The following summarizes the rating categories used by
Standard and Poor's for commercial paper:

     "A-1" - Obligations are rated in the highest category indicating that the
obligor's capacity to meet its financial commitment on the obligation is strong.
Within this category, certain obligations are designated with a plus sign (+).
This indicates that the obligor's capacity to meet its financial commitment on
these obligations is extremely strong.

     "A-2" - Obligations are somewhat more susceptible to the adverse effects of
changes in circumstances and economic conditions than obligations in higher
rating categories. However, the obligor's capacity to meet its financial
commitment on the obligation is satisfactory.

     "A-3" - Obligations exhibit adequate protection parameters. However,
adverse economic conditions or changing circumstances are more likely to lead to
a weakened capacity of the obligor to meet its financial commitment on the
obligation.

     "B" - Obligations are regarded as having significant speculative
characteristics. The obligor currently has the capacity to meet its financial
commitment on the obligation; however, it faces major ongoing uncertainties
which could lead to the obligor's inadequate capacity to meet its financial
commitment on the obligation.

     "C" - Obligations are currently vulnerable to nonpayment and are dependent
upon favorable business, financial, and economic conditions for the obligor to
meet its financial commitment on the obligation.

     "D" - Obligations are in payment default. The "D" rating category is used
when payments on an obligation are not made on the date due even if the
applicable grace period has not expired, unless S&P believes that such payments
will be made during such grace period. The "D" rating will be used upon the
filing of a bankruptcy petition or the taking of a similar action if payments on
an obligation are jeopardized.

     Moody's commercial paper ratings are opinions of the ability of issuers to
repay punctually senior debt obligations not having an original maturity in
excess of one year, unless explicitly noted. The following summarizes the rating
categories used by Moody's for commercial paper:

     "Prime-1" - Issuers (or supporting institutions) have a superior ability
for repayment of senior short-term debt obligations. Prime-1 repayment ability
will often be evidenced by many of the following characteristics: leading market
positions in well-established

                                      A-1
<PAGE>
 
industries; high rates of return on funds employed; conservative capitalization
structure with moderate reliance on debt and ample asset protection; broad
margins in earnings coverage of fixed financial charges and high internal cash
generation; and well-established access to a range of financial markets and
assured sources of alternate liquidity.

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

     "Prime-3" - Issuers (or supporting institutions) have an acceptable ability
for repayment of senior short-term debt obligations. The effect of industry
characteristics and market compositions may be more pronounced. Variability in
earnings and profitability may result in changes in the level of debt protection
measurements and may require relatively high financial leverage. Adequate
alternate liquidity is maintained.

     "Not Prime" - Issuers do not fall within any of the Prime rating
categories.


     The three rating categories of Duff & Phelps for investment grade
commercial paper and short-term debt are "D-1," "D-2" and "D-3." Duff & Phelps
employs three designations, "D-1+," "D-1" and "D-1-," within the highest rating
category. The following summarizes the rating categories used by Duff & Phelps
for commercial paper:

     "D-1+" - Debt possesses the 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" - Debt possesses very high certainty of timely payment. Liquidity
factors are excellent and supported by good fundamental protection factors. Risk
factors are minor.

     "D-1-" - Debt possesses high certainty of timely payment. Liquidity factors
are strong and supported by good fundamental protection factors. Risk factors
are very small.

     "D-2" - Debt possesses 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" - Debt possesses satisfactory liquidity and other protection factors
qualify issues as to investment grade. Risk factors are larger and subject to
more variation. Nevertheless, timely payment is expected.

     "D-4" - Debt possesses speculative investment characteristics. Liquidity is
not sufficient to insure against disruption in debt service. Operating factors
and market access may be subject to a high degree of variation.

                                      A-2
<PAGE>
 
     "D-5" - Issuer has failed to meet scheduled principal and/or interest
payments.


     Fitch IBCA short-term ratings apply to debt obligations that have time
horizons of less than 12 months for most obligations, or up to three years for
U.S. public finance securities.  The following summarizes the rating categories
used by Fitch IBCA for short-term obligations:

     "F1" - Securities possess the highest credit quality.  This designation
indicates the strongest capacity for timely payment of financial commitments and
may have an added "+" to denote any exceptionally strong credit feature.

     "F2" - Securities possess good credit quality. This designation indicates 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" - Securities possess fair credit quality.  This designation indicates
that 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" - Securities possess speculative credit quality.  This designation
indicates minimal capacity for timely payment of financial commitments, plus
vulnerability to near-term adverse changes in financial and economic conditions.

     "C" - Securities possess high default risk. This designation indicates that
default is a real possibility and that the capacity for meeting financial
commitments is solely reliant upon a sustained, favorable business and economic
environment.

     "D" - Securities are in actual or imminent payment default.

     Thomson BankWatch short-term ratings assess the likelihood of an untimely
payment of principal and interest of debt instruments with original maturities
of one year or less.  The following summarizes the ratings used by Thomson
BankWatch:

     "TBW-1" - This designation represents Thomson BankWatch's highest category
and indicates a very high likelihood that principal and interest will be paid on
a timely basis.

     "TBW-2" - This designation represents Thomson BankWatch's second-highest
category and indicates that while the degree of safety regarding timely
repayment of principal and interest is strong, the relative degree of safety is
not as high as for issues rated "TBW-1."

     "TBW-3" - This designation represents Thomson BankWatch's lowest 
investment-grade category and indicates that while the obligation is more 
susceptible to adverse developments (both internal and external) than those with
higher ratings, the capacity to service principal and interest in a timely 
fashion is considered adequate.

                                      A-3
<PAGE>
 
          "TBW-4" - This designation represents Thomson BankWatch's lowest
rating category and indicates that the obligation is regarded as non-investment
grade and therefore speculative.

CORPORATE AND MUNICIPAL LONG-TERM DEBT RATINGS
- ----------------------------------------------

     The following summarizes the ratings used by Standard & Poor's for
corporate and municipal debt:

     "AAA" - An obligation rated "AAA" has the highest rating assigned by
Standard & Poor's. The obligor's capacity to meet its financial commitment on
the obligation is extremely strong.

     "AA" - An obligation rated "AA" differs from the highest rated obligations
only in small degree.  The obligor's capacity to meet its financial commitment
on the obligation is very strong.

     "A" - An obligation rated "A" is somewhat more susceptible to the adverse
effects of changes in circumstances and economic conditions than obligations in
higher-rated categories.  However, the obligor's capacity to meet its financial
commitment on the obligation is still strong.

     "BBB" - An obligation rated "BBB" exhibits adequate protection parameters.
However, adverse economic conditions or changing circumstances are more likely
to lead to a weakened capacity of the obligor to meet its financial commitment
on the obligation.

     Obligations rated "BB," "B," "CCC," "CC" and "C" are regarded as having
significant speculative characteristics.  "BB" indicates the least degree of
speculation and "C" the highest.  While such obligations will likely have some
quality and protective characteristics, these may be outweighed by large
uncertainties or major exposures to adverse conditions.

     "BB" - An obligation rated "BB" is less vulnerable to nonpayment than other
speculative issues.  However, it faces major ongoing uncertainties or exposure
to adverse business, financial or economic conditions which could lead to the
obligor's inadequate capacity to meet its financial commitment on the
obligation.

     "B" - An obligation rated "B" is more vulnerable to nonpayment than
obligations rated "BB", but the obligor currently has the capacity to meet its
financial commitment on the obligation.  Adverse business, financial or economic
conditions will likely impair the obligor's capacity or willingness to meet its
financial commitment on the obligation.

     "CCC" - An obligation rated "CCC" is currently vulnerable to nonpayment,
and is dependent upon favorable business, financial and economic conditions for
the obligor to meet its financial commitment on the obligation. In the event of
adverse business, financial, or economic 

                                      A-4
<PAGE>
 
conditions, the obligor is not likely to have the capacity to meet its financial
commitment on the obligation.

     "CC" - An obligation rated "CC" is currently highly vulnerable to
nonpayment.

     "C" - The "C" rating may be used to cover a situation where a bankruptcy
petition has been filed or similar action has been taken, but payments on this
obligation are being continued.

     "D" - An obligation rated "D" is in payment default. The "D" rating
category is used when payments on an obligation are not made on the date due
even if the applicable grace period has not expired, unless S&P believes that
such payments will be made during such grace period. The "D" rating also will be
used upon the filing of a bankruptcy petition or the taking of a similar action
if payments on an obligation are jeopardized.

     PLUS (+) OR MINUS (-) - The ratings from "AA" through "CCC" may be modified
by the addition of a plus or minus sign to show relative standing within the
major rating categories.

     "r" - This symbol is attached to the ratings of instruments with
significant noncredit risks. It highlights risks to principal or volatility of
expected returns which are not addressed in the credit rating. Examples include:
obligations linked or indexed to equities, currencies, or commodities;
obligations exposed to severe prepayment risk such as interest-only or 
principal-only mortgage securities; and obligations with unusually risky 
interest terms, such as inverse floaters.

  The following summarizes the ratings used by Moody's for corporate and
municipal long-term debt:

     "Aaa" - Bonds 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.

     "Aa" - Bonds 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 risk appear somewhat larger than the "Aaa" securities.

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

                                      A-5
<PAGE>
 
     "Baa" - Bonds are considered as medium-grade obligations, (i.e., they are
neither highly protected nor poorly secured).  Interest payments and principal
security appear adequate for the present but certain protective elements may be
lacking or may be characteristically unreliable over any great length of time.
Such bonds lack outstanding investment characteristics and in fact have
speculative characteristics as well.

     "Ba," "B," "Caa," "Ca," and "C" - Bonds that possess one of these ratings
provide questionable protection of interest and principal ("Ba" indicates
speculative elements; "B" indicates a general lack of characteristics of
desirable investment; "Caa" are of poor standing; "Ca" represents obligations
which are speculative in a high degree; and "C" represents the lowest rated
class of bonds). "Caa," "Ca" and "C" bonds may be in default.

     Con. (---) - Bonds for which the security depends upon the completion of
some act or the fulfillment of some condition are rated conditionally. These are
bonds secured by (a) earnings of projects under construction, (b) earnings of
projects unseasoned in operating experience, (c) rentals which begin when
facilities are completed, or (d) payments to which some other limiting condition
attaches. Parenthetical rating denotes probable credit stature upon completion
of construction or elimination of basis of condition.

     Note: Moody's applies numerical modifiers 1, 2, and 3 in each generic
rating classification from "Aa" through "Caa". The modifier 1 indicates that the
obligation ranks in the higher end of its generic rating category; the modifier
2 indicates a mid-range ranking; and the modifier 3 indicates a ranking in the
lower end of its generic rating category.

     The following summarizes the long-term debt ratings used by Duff & Phelps
for corporate and municipal long-term debt:

     "AAA" - Debt is considered to be of the highest credit quality.  The risk
factors are negligible, being only slightly more than for risk-free U.S.
Treasury debt.

     "AA" - Debt is considered to be of high credit quality.  Protection factors
are strong.  Risk is modest but may vary slightly from time to time because of
economic conditions.

     "A" - Debt possesses protection factors which are average but adequate.
However, risk factors are more variable in periods of greater economic stress.

     "BBB" - Debt possesses below-average protection factors but such protection
factors are still considered sufficient for prudent investment.  Considerable
variability in risk is present during economic cycles.

     "BB," "B," "CCC," "DD," and "DP" - Debt that possesses one of these ratings
is considered to be below investment grade. Although below investment grade,
debt rated "BB" is deemed likely to meet obligations when due. Debt rated "B"
possesses the risk that obligations will not be met when due. Debt rated "CCC"
is well below investment grade and has considerable uncertainty as to timely
payment of principal, interest or preferred dividends. Debt 

                                      A-6
<PAGE>
 
rated "DD" is a defaulted debt obligation, and the rating "DP" represents
preferred stock with dividend arrearages.

     To provide more detailed indications of credit quality, the "AA," "A,"
"BBB," "BB" and "B" ratings may be modified by the addition of a plus (+) or
minus (-) sign to show relative standing within these major categories.

     The following summarizes the ratings used by Fitch IBCA for corporate and
municipal bonds:

     "AAA" - Bonds considered to be investment grade and of the highest credit
quality.  These ratings denote the lowest expectation of credit risk and 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" - Bonds considered to be investment grade and of very high credit
quality.  These ratings denote a very low expectation of credit risk and
indicate very strong capacity for timely payment of financial commitments.  This
capacity is not significantly vulnerable to foreseeable events.

     "A" - Bonds considered to be investment grade and of high credit quality.
These ratings denote a low expectation of credit risk and indicate strong
capacity for timely payment of financial commitments.  This capacity may,
nevertheless, be more vulnerable to changes in circumstances or in economic
conditions than is the case for higher ratings.

     "BBB" - Bonds considered to be investment grade and of good credit quality.
These ratings denote 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.

     "BB" - Bonds considered to be speculative. These ratings indicate that
there is a possibility of credit risk developing, particularly as the result of
adverse economic changes over time; however, business or financial alternatives
may be available to allow financial commitments to be met. Securities rated in
this category are not investment grade.

     "B" - Bonds are considered highly speculative.  These ratings indicate that
significant credit risk is present, but a limited margin of safety remains.
Financial commitments are currently being met; however, capacity for continued
payment is contingent upon a sustained, favorable business and economic
environment.

                                      A-7
<PAGE>
 
     "CCC", "CC", "C" - Bonds have high default risk.  Default is a real
possibility, and capacity for meeting financial commitments is solely reliant
upon sustained, favorable business or economic developments.  "CC" ratings
indicate that default of some kind appears probable, and "C" ratings signal
imminent default.

     "DDD," "DD" and "D" - Bonds are in default.  Securities are not meeting
obligations and are extremely speculative.  "DDD" designates the highest
potential for recovery of amounts outstanding on any securities involved and "D"
represents the lowest potential for recovery.

     To provide more detailed indications of credit quality, the Fitch IBCA
ratings from and including "AA" to "B" may be modified by the addition of a plus
(+) or minus (-) sign to show relative standing within these major rating
categories.

     Thomson BankWatch assesses the likelihood of an untimely repayment of
principal or interest over the term to maturity of long term debt and preferred
stock which are issued by United States commercial banks, thrifts and non-bank
banks; non-United States banks; and broker-dealers.  The following summarizes
the rating categories used by Thomson BankWatch for long-term debt ratings:

     "AAA" - This designation indicates that the ability to repay principal and
interest on a timely basis is extremely high.

     "AA" - This designation indicates a very strong ability to repay principal
and interest on a timely basis, with limited incremental risk compared to issues
rated in the highest category.

     "A" - This designation indicates that the ability to repay principal and
interest is strong.  Issues rated "A" could be more vulnerable to adverse
developments (both internal and external) than obligations with higher ratings.

     "BBB" - This designation represents the lowest investment-grade category
and indicates an acceptable capacity to repay principal and interest. Issues
rated "BBB" are more vulnerable to adverse developments (both internal and
external) than obligations with higher ratings.

     "BB," "B," "CCC," and "CC," - These designations are assigned by Thomson
BankWatch to non-investment grade long-term debt.  Such issues are regarded as
having speculative characteristics regarding the likelihood of timely payment of
principal and interest.  "BB" indicates the lowest degree of speculation and
"CC" the highest degree of speculation.

     "D" - This designation indicates that the long-term debt is in default.

                                      A-8
<PAGE>
 
     PLUS (+) OR MINUS (-) - The ratings from "AAA" through "CC" may include a
plus or minus sign designation which indicates where within the respective
category the issue is placed.

MUNICIPAL NOTE RATINGS
- ----------------------

     A Standard and Poor's rating reflects the liquidity concerns and market
access risks unique to notes due in three years or less. The following
summarizes the ratings used by Standard & Poor's Ratings Group for municipal
notes:

     "SP-1" - The issuers of these municipal notes exhibit a strong capacity to
pay principal and interest. Those issues determined to possess very strong
characteristics are given a plus (+) designation.

     "SP-2" - The issuers of these municipal notes exhibit satisfactory capacity
to pay principal and interest, with some vulnerability to adverse financial and
economic changes over the term of the notes.

     "SP-3" - The issuers of these municipal notes exhibit speculative capacity
to pay principal and interest.

 
     Moody's ratings for state and municipal notes and other short-term loans
are designated Moody's Investment Grade ("MIG") and variable rate demand
obligations are designated Variable Moody's Investment Grade ("VMIG"). Such
ratings recognize the differences between short-term credit risk and long-term
risk. The following summarizes the ratings by Moody's Investors Service, Inc.
for short-term notes:

     "MIG-1"/"VMIG-1" - This designation denotes best quality.  There is present
strong protection by established cash flows, superior liquidity support or
demonstrated broad-based access to the market for refinancing.

     "MIG-2"/"VMIG-2" - This designation denotes high quality, with margins of
protection that are ample although not so large as in the preceding group.

     "MIG-3"/"VMIG-3" - This designation denotes favorable quality, with all
security elements accounted for but lacking the undeniable strength of the
preceding grades.  Liquidity and cash flow protection may be narrow and market
access for refinancing is likely to be less well established.

     "MIG-4"/"VMIG-4" - This designation denotes adequate quality.  Protection
commonly regarded as required of an investment security is present and although
not distinctly or predominantly speculative, there is specific risk.

                                      A-9
<PAGE>
 
     "SG" - This designation denotes speculative quality. Debt instruments in
this category lack of margins of protection.

     Fitch IBCA and Duff & Phelps use the short-term ratings described under
Commercial Paper Ratings for municipal notes.

                                     A-10
<PAGE>
 
                                  Law Offices
                          Drinker Biddle & Reath LLP
                      Philadelphia National Bank Building
                             1345 Chestnut Street
                          Philadelphia, PA 19107-3496
                          Telephone:  (215) 988-2700
                             Fax:  (215) 988-2757



                               December 4, 1998

VIA EDGAR TRANSMISSION
- ----------------------

Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C.  20549

               Re:  The RBB Fund, Inc. (the "Registrant")
                      Registration Nos. 33-20827/811-5518
                      -----------------------------------

Ladies and Gentlemen:

     On behalf of the Registrant and pursuant to Rule 497 (c) under the
Securities Act of 1933, filed herewith are:

     1)   the Prospectus, dated December 1, 1998, relating to Registrant's n/i
          numeric investors Small Cap Value Fund and

     2)   the Statement of Additional Information dated December 1, 1998,
          relating to Registrant's n/i numeric investors Small Cap Value Fund.

     Questions and comments concerning the enclosed materials may be directed to
the undersigned at (215) 988-2935.


                                        Very truly yours,

                                        /s/ Allan J. Oster
                                        ------------------
                                        Allan J. Oster


Enclosures


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