RBB FUND INC
N-30D, 1998-04-30
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                              --------------------

                                   THE SANSOM
                                     STREET
                                     FAMILY

                             MONEY MARKET PORTFOLIO

                               Semi-Annual Report
                                February 28, 1998

                              =====================

<PAGE>

                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.

                     SEMI-ANNUAL INVESTMENT ADVISER'S REPORT


     Market participants were pleasantly surprised last year as the stock market
again racked up double digit gains, the bond market saw long-term interest rates
fall to near  record  lows and money  market  fund assets grew by 20% to over $1
trillion.  Early in 1997,  these robust  results were not widely  expected.  The
nation's  economy was  expanding at almost a 5% pace and higher prices for goods
and services were clearly anticipated. The Federal Reserve seemed biased towards
tightening  monetary  policy,  in what they suggested would be a preemptive move
against future  inflationary  pressures.  On March 25, the Fed raised short-term
rates by 25 basis  points to 5.50% and with the  benefit of  perfect  hindsight,
their action clearly achieved the desired results.  The economy slowed to a 3.1%
pace in the third quarter and 3.9% in the fourth  quarter,  while inflation fell
to its lowest level in a decade.  Wholesale prices,  in fact,  actually declined
1.2% in 1997,  while consumer prices rose only 1.7%. As the year came to an end,
the financial crisis among the Asian economies  became a significant  influencer
of global  economics  and the  direction of interest  rates.  U.S.  fixed income
securities did well, as a flight to quality and safety unfolded. In January, the
30-year treasury bond fell to a record low of 5.70%.  Sentiment towards monetary
policy also shifted,  given Mr. Greenspan's  comments about deflation,  and some
Fed watchers even began to talk about the  possibility  of an easing of monetary
policy.

     Short-term  taxable interest rates traded in a narrow range in 1997, as the
Federal Reserve made only one change to monetary policy.  Early in the year, the
yield curve inside of one year was positively sloped, reflecting the widely held
view that the Fed would tighten monetary policy. While overnight rates held near
5.50%,  one-year  maturities reached a peak near 6.25%. This scenario encouraged
the funds to extend portfolio maturities to the 50-60 day range. The second half
of the year, however, was a different story. Low inflation and the concerns over
the Asian crisis precipitated a significant flattening of the money market yield
curve.  The 50-75 basis point spread  available  earlier in the year declined to
10-15 basis points in the fourth and early first  quarters.  The Treasury market
experienced an even more dramatic shift, as the yield curve inverted.  Portfolio
maturities were shortened in this  environment,  with particular  focus given to
issuer credit quality and the deteriorating Asian economies.

     At the end of  February,  assets in the  Money  Market  Portfolio  stood at
$3,013,021,180, increasing from $2,700,025,629 last August.

                   PNC Institutional Management Corporation
                   (Please dial toll-free 800-430-9618 for questions regarding
                   your account or contact your broker.)

<PAGE>

                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                             MONEY MARKET PORTFOLIO
                             STATEMENT OF NET ASSETS
                                FEBRUARY 28, 1998
                                   (UNAUDITED)

                                                     PAR
                                                    (000)       VALUE
                                                  --------   ------------
AGENCY OBLIGATIONS--0.7%           
Student Loan Marketing Association(DAGGER)
   5.718% 03/03/98 ........................       $ 10,000   $ 10,000,000
   5.728% 03/03/98 ........................         10,000     10,000,000
                                                             ------------
     TOTAL AGENCY OBLIGATIONS
       (Cost $20,000,000) .................                    20,000,000
                                                             ------------
CERTIFICATES OF DEPOSIT--17.4%
BANK NOTES--3.3%
First National Bank of Boston
   5.700% 04/06/98 ........................         25,000     25,000,000
   5.800% 04/27/98 ........................         75,000     75,000,000
                                                             ------------
                                                              100,000,000
                                                             ------------
BANKS--2.2%
Banque Paribas
   5.530% 05/04/98 ........................         25,000     24,998,560
Credit Suisse
   6.240% 04/08/98 ........................         40,000     40,007,055
                                                             ------------
                                                               65,005,615
                                                             ------------
DOMESTIC CERTIFICATES OF DEPOSIT--5.0%
Bankers Trust Co. 
   5.980% 06/19/98 ........................         50,000     49,997,155
   5.820% 07/31/98 ........................         25,000     24,997,025
   5.880% 08/11/98 ........................         25,000     24,996,796
Chase Manhattan Bank-Delaware
   5.710% 03/09/98 ........................         50,000     50,000,000
                                                             ------------
                                                              149,990,976
                                                             ------------
YANKEE DOLLAR CERTIFICATES OF DEPOSIT--6.9%
Banque Nationale de Paris
   5.860% 08/10/98 ........................         25,000     24,993,635
Banque Paribas
   5.560% 05/26/98 ........................         25,000     25,000,000
Canadian Imperial Bank of Commerce
   5.660% 02/26/99 ........................         40,000     39,980,989
Deutsche Bank
   6.000% 03/25/98 ........................         50,000     50,005,942
Royal Bank of Canada
   6.200% 04/06/98 ........................         19,000     19,002,366
   5.940% 06/25/98 ........................         25,000     24,995,439


                                                        PAR
                                                       (000)       VALUE
                                                     --------   ------------
YANKEE DOLLAR CERTIFICATES OF DEPOSIT--(CONTINUED)
Societe Generale
   5.780% 10/08/98 ............................     $  125,000   $ 24,974,541
                                                                 ------------
                                                                  208,952,912
                                                                 ------------
     TOTAL CERTIFICATES OF DEPOSIT
       (Cost $523,949,503) ....................                   523,949,503
                                                                 ------------
COMMERCIAL PAPER--51.1%
ASSET BACKED SECURITIES--7.8%
CXC, Inc.
   5.470% 04/01/98 ............................         50,000     49,764,486
   5.470% 04/20/98 ............................         50,000     49,620,139
Receivables Capital Corp.
   5.500% 04/06/98 ............................         45,082     44,834,049
Windmill Funding
   5.520% 03/02/98 ............................         50,000     49,992,333
   5.550% 04/24/98 ............................         40,517     40,179,696
                                                                 ------------
                                                                  234,390,703
                                                                 ------------
BANKS--8.7%
AB Spintab Swedmortgage
   5.740% 04/07/98 ............................         50,000     49,705,028
   5.740% 04/15/98 ............................         30,000     29,784,750
   5.470% 05/12/98 ............................         25,000     24,726,500
   5.450% 06/09/98 ............................         30,000     29,545,833
AMRO N.A. Finance Inc.
   5.560% 05/01/98 ............................         50,000     49,528,944
Unifunding Inc. 
   5.570% 03/03/98 ............................         30,000     29,990,717
   5.630% 04/22/98 ............................         50,000     49,593,389
                                                                 ------------
                                                                  262,875,161
                                                                 ------------
BUSINESS CREDIT INSTITUTIONS--1.8%
Enterprise Funding Corp.
   5.570% 04/06/98 ............................         38,728     38,512,285
   5.480% 04/14/98 ............................         17,179     17,063,939
                                                                 ------------
                                                                   55,576,224
                                                                 ------------
CONGLOMERATES--1.6%
BTR Dunlop Finance Inc. PLC
   5.450% 05/14/98 ............................         50,000     49,439,861
                                                                 ------------

                 See Accompanying Notes to Financial Statements.

                                        2

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                             MONEY MARKET PORTFOLIO
                       STATEMENT OF NET ASSETS (CONTINUED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)

                                                          PAR
                                                         (000)       VALUE
                                                       --------   ------------
FINANCE LESSORS--3.3%
General Electric Capital Corp. 
   5.450% 06/11/98 .............................       $100,000   $ 98,455,833
                                                                  ------------
FINANCE SERVICES--4.2%
Barton Capital Corp.
   5.540% 04/06/98 .............................         32,517     32,336,856
   5.490% 04/14/98 .............................         45,000     44,698,050
Old Line Funding Corp.
   5.520% 03/09/98 .............................         50,000     49,938,667
                                                                  ------------
                                                                   126,973,573
                                                                  ------------
FOOD & KINDRED PRODUCTS--2.7%
Diageo Capital PLC
   5.450% 05/11/98 .............................         25,000     24,731,285
   5.470% 04/29/98 .............................         25,000     24,775,882
Grand Metropolitan Capital Corp.
   5.620% 04/15/98 .............................         33,000     32,768,175
                                                                  ------------
                                                                    82,275,342
                                                                  ------------
HOUSEHOLD AUDIO & VIDEO EQUIPMENT--0.8%
Toshiba America, Inc. 
   5.470% 05/15/98 .............................         25,000     24,715,104
                                                                  ------------
MISCELLANEOUS BUSINESS CREDIT INSTITUTIONS--1.7%
Unifunding Inc.
   5.480% 03/09/98 .............................         50,000     49,939,111
                                                                  ------------
MOTOR VEHICLES & CAR BODIES--2.5%
Daimler-Benz North America Corp. 
   5.480% 03/06/98 .............................         75,000     74,942,917
                                                                  ------------
SECURITY BROKERS & DEALERS--7.6%
Lehman Brothers Holdings Inc.
   5.520% 03/18/98 .............................         50,000     49,869,667
Merrill Lynch & Co. Canandian DCP
   5.610% 03/04/98 .............................         50,000     49,976,625
Morgan Stanley Group, Inc. 
   5.430% 04/09/98 .............................         50,000     49,705,875
Lehman Brothers Holdings Inc. 
   5.520% 05/28/98 .............................         40,000     39,460,267
Morgan Stanley Group, Inc. 
   5.400% 07/23/98 .............................         40,000     39,136,000
                                                                  ------------
                                                                   228,148,434
                                                                  ------------
                                                         PAR
                                                        (000)         VALUE
                                                      --------   --------------
SHORT-TERM BUSINESS CREDIT INSTITUTIONS--4.3%
Asset Securitization Coop Corp. 
   5.550% 04/06/98 ..........................         $ 50,000   $   49,722,500
Delaware Funding Corp. 
   5.570% 03/16/98 ..........................           30,523       30,452,161
Sears Roebuck Acceptance Corp. 
   5.460% 05/19/98 ..........................           50,000       49,400,917
                                                                 --------------
                                                                    129,575,578
                                                                 --------------
WHOLESALE - MISCELLANEOUS DURABLE GOODS--2.5%
Mitsubishi International Corp. 
   5.510% 05/28/98 ..........................           25,000       24,663,278
   5.560% 04/28/98 ..........................           25,000       24,776,055
   5.560% 04/30/98 ..........................           25,000       24,768,333
                                                                 --------------
                                                                     74,207,666
                                                                 --------------
WHOLESALE GROCERIES & RELATED GOODS--1.6%
Mitsubishi International Corp. 
   5.510% 05/29/98 ..........................           50,000       49,318,903
                                                                 --------------
     TOTAL COMMERCIAL PAPER
       (Cost $1,540,834,410) ................                     1,540,834,410
                                                                 --------------
MUNICIPAL BONDS--2.7%
FLORIDA--0.1%
Coral Springs,VRDN IDR (Suntrust)(DAGGER)
   5.600% 03/04/98 ..........................            2,700        2,700,000
                                                                 --------------
GEORGIA--0.3%
De Kalb County Development
   Authority VRDN Series 1995 B
   (Emory University Project)(DAGGER)
   5.600% 02/28/98 ..........................            9,485        9,485,000
                                                                 --------------
ILLINOIS--0.2%
Illinois Health Facilities Authority
   Convertible/ VRDN Revenue Bond
   (The Streeterville Corp. Project)
   Series 1993-B(DAGGER)
   5.700% 03/04/98 ..........................            4,400        4,400,000
                                                                 --------------
INDIANA--0.2%
Bremen, Inc. TARN VRDN Series
   1996 B (Society National Bank,
   Cleveland)(DAGGER)
   5.610% 03/05/98 ..........................            4,400        4,400,000
                                                                 --------------

                 See Accompanying Notes to Financial Statements.

                                        3

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                             MONEY MARKET PORTFOLIO
                       STATEMENT OF NET ASSETS (CONTINUED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)

                                                  PAR
                                                 (000)       VALUE
                                               --------   ------------
KENTUCKY--0.1%
Boone County Taxable IDR Refunding
   Bonds VRDN (Square D Company
   Project) Series 1994-B(DAGGER)
   5.700% 03/04/98 .......................      $ 4,200   $ 4,200,000
                                                          -----------
MISSISSIPPI--0.9%
Hinds County, IDR Revenue Bond
   VRDN Series 1992(DAGGER)
   5.600% 03/04/98 .......................        1,860     1,860,000
Mississippi Business Finance Corp. 
   IDR Revenue Bond VRDN (Dana
   Lighting Project) Series 1995(DAGGER)
   5.600% 03/07/98 .......................        6,100     6,100,000
Mississippi Business Finance Corp.       
   Taxable IDR Revenue Bond VRDN                
   (Bryan Foods, Inc. Project)                  
   Series 1994(DAGGER)                          
   5.700% 03/04/98 .......................       14,000    14,000,000
Mississippi Business Finance Corp.  
   Taxable IDR Revenue Bond VRDN                
   Series 1995(DAGGER)                          
   5.600% 03/07/98 .......................        7,000     7,000,000
                                                          -----------
                                                           28,960,000
                                                          -----------
NORTH CAROLINA--0.4%                            
City of Asheville Tax Corp. VRDN(DAGGER)        
   5.650% 03/04/98 .......................       11,700    11,700,000
                                                          -----------
TEXAS--0.5%                                      
South Central Texas Industrial
   Development Corp. Taxable IDR
   Revenue Bond VRDN (Rohr
   Industries Project Series 1990)(DAGGER)
   5.700% 03/04/98 .......................      14,800    14,800,000
                                                         -----------
     TOTAL MUNICIPAL BONDS
       (Cost $80,645,000) ................                80,645,000
                                                         -----------

                                               PAR
                                              (000)        VALUE
                                             --------   ------------
MEDIUM TERM NOTES--15.2%
BANKS--3.3%
Skandinaviska Enskilda Banken
   Funding Inc.(DAGGER)
   5.550% 03/12/98 ...................       $ 50,000   $ 49,974,367
Skandinaviska Enskilda(DAGGER)
   5.610% 02/25/99 ...................         50,000     49,981,031
                                                        ------------
                                                          99,955,398
                                                        ------------
FINANCE SERVICES--6.1%
General American Life(DAGGER)
   5.820% 03/02/98 ...................         50,000     50,000,000
SMM Trust 1997-A(DAGGER)
   5.906% 03/23/98 ...................         20,000     20,000,000
SMM Trust 1997-L(DAGGER)
   5.625% 03/29/98 ...................         13,200     13,200,000
SMM Trust 1997-X(DAGGER)
   5.625% 03/12/98 ...................        100,000    100,000,000
                                                        ------------
                                                         183,200,000
                                                        ------------
SECURITY BROKERS & DEALERS--4.8%
Bear Stearns Companies, Inc.(DAGGER)
   5.601% 03/06/98 ...................         25,000     25,000,000
   5.595% 03/24/98 ...................         40,000     40,000,000
   5.605% 03/26/98 ...................         30,000     30,000,000
Lehman Brothers Holdings, Inc.(DAGGER)
   5.958% 03/05/98 ...................         50,000     50,000,000
                                                        ------------
                                                         145,000,000
                                                        ------------
SERVICES - AUTO RENT & LEASE--1.0%
PHH Corp(DAGGER)
   5.565% 03/13/98 ...................         30,000     29,991,082
                                                        ------------
     TOTAL MEDIUM TERM NOTES
       (Cost $458,146,480) ...........                   458,146,480
                                                        ------------

                 See Accompanying Notes to Financial Statements.

                                        4

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                             MONEY MARKET PORTFOLIO
                       STATEMENT OF NET ASSETS (CONCLUDED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)

                                                  PAR
                                                 (000)       VALUE
                                               --------   ------------
REPURCHASE AGREEMENTS--12.4%
  Goldman Sachs & Co.
    (Agreement dated 02/27/98 to be
    repurchased at $100,047,083,
    collateralized by $85,579,720 
    Federal Home Loan Mortgage 
    Corporation due 09/15/04 to
    11/15/23 and $63,500,000 Federal
    National Mortgage Association 
    due 04/25/23. Market value of 
    collateral is $103,000,000.)
    5.650% 03/02/98 ......................... $100,000  $ 100,000,000
  Lehman Government Securities Inc.
    (Agreement dated 02/27/98 to be
    repurchased at $100,045,000,
    collateralized by $71,305,000
    Federal Home Loan Mortgage 
    Corporation due 10/15/22 to
    01/15/26 and $62,778,948 Federal
    National Mortgage Association
    due 10/25/08 to 10/25/22. Market
    value of collateral is 
    $103,003,354.)
    5.400% 03/02/98 .........................  100,000    100,000,000
  Swiss Bank Corp.
   (Agreement dated 02/27/98 to be 
   repurchased at $75,034,625 and 
   $100,047,333, respectively,
   collateralized by $77,625,000
   Government National Mortgage
   Association due 10/20/27 and
   $102,914,000 Federal National
   Mortgage Association due 01/01/28.
   Market value of collateral is
   $184,783,604.)
   5.540% 03/02/98 ..........................   75,000    75,000,000
   5.680% 03/02/98 ..........................  100,000   100,000,000
                                                        ------------
     TOTAL REPURCHASE
       AGREEMENTS
       (Cost $375,000,000) ..................            375,000,000
                                                        ------------
TOTAL INVESTMENTS--99.5%
   (Cost $2,998,575,393) ....................          2,998,575,393

                                                            VALUE
                                                      --------------
OTHER ASSETS IN EXCESS
   OF LIABILITIES--0.5% .....................         $   14,445,787
                                                      --------------
NET ASSETS (Applicable to
   1,504,186,443 Bedford shares,
   198,797 Cash Preservation shares,
   822,075,114 Janney Montgomery 
   Scott shares, 686,561,111
   Sansom Street shares
   and 800 other shares)--100.0% ............        $3,013,021,180
                                                     ==============
NET ASSET VALUE, Offering and
   Redemption Price Per Share
   ($3,013,021,180 (DIVIDE) 3,013,022,265) ..                 $1.00
                                                              =====
*  Also cost for Federal income tax purposes.
(DAGGER) Variable Rate  Obligations -- The interest rate shown is the rate as of
     February  28,  1998 and the  maturity  date shown is the longer of the next
     interest rate  readjustment date or the date the principal amount shown can
     be recovered through demand.
(DOUBLE  DAGGER) Put Bonds --  Maturity  date is the put date.

INVESTMENT ABBREVIATIONS 
VRDN ..................................................Variable Rate Demand Note
LOC ............................................................Letter of Credit
IDR ..............................................Industrial Development Revenue

                 See Accompanying Notes to Financial Statements.

                                        5

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                             MONEY MARKET PORTFOLIO
                             STATEMENT OF OPERATIONS
             FOR THE SIX MONTHS ENDED FEBRUARY 28, 1998 (UNAUDITED)

Investment Income
   Interest ..................................................      $79,170,730
                                                                    -----------
Expenses
   Investment advisory fees ..................................        5,016,420
   Distribution fees .........................................        6,201,939
   Service organization fees .................................          281,246
   Directors' fees ...........................................           24,442
   Custodian fees ............................................          220,426
   Transfer agent fees .......................................        1,885,453
   Legal fees ................................................           52,774
   Audit fees ................................................           32,785
   Registration fees .........................................          209,692
   Insurance expense .........................................           25,693
   Printing fees .............................................          264,667
   Miscellaneous .............................................              897
                                                                    -----------
                                                                     14,216,434

   Less fees waived ..........................................       (1,872,337)
   Less expense reimbursement by advisor .....................         (273,085)
                                                                    -----------
        Total expenses .......................................       12,071,012
                                                                    -----------
   Net investment income .....................................       67,099,718
                                                                    -----------
   Realized gain on investments ..............................           10,099
                                                                    -----------
   Net increase in net assets resulting from operations ......      $67,109,817
                                                                    ===========


                 See Accompanying Notes to Financial Statements.

                                        6

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                             MONEY MARKET PORTFOLIO
                       STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                                FOR THE               FOR THE
                                                           SIX MONTHS ENDED         YEAR ENDED
                                                           FEBRUARY 28, 1998      AUGUST 31, 1997
                                                           -----------------      ---------------
                                                              (UNAUDITED)
<S>                                                         <C>                    <C>           
Increase (decrease) in net assets:
Operations:
  Net investment income .................................   $   67,099,718         $  116,087,132
  Net gain on investments ...............................           10,099                 22,330
                                                            --------------         --------------
  Net increase in net assets resulting from operations ..       67,109,817            116,109,462
                                                            --------------         --------------
Distributions to shareholders:                                                     
Dividends to shareholders from net investment income:                              
    Bedford shares ......................................      (33,334,065)           (56,929,832)
    Cash Preservation shares ............................           (5,235)               (10,852)
    Janney Montgomery Scott shares ......................      (18,087,563)           (29,943,530)
    RBB shares ..........................................               --                 (1,286)
    Sansom Street shares ................................      (15,672,855)           (29,201,632)
                                                            --------------         --------------
    Total dividends to shareholders .....................      (67,099,718)          (116,087,132)
                                                            --------------         --------------
Net capital share transactions ..........................      312,985,452            504,179,861
                                                            --------------         --------------
Total increase in net assets ............................      312,995,551            504,202,191
Net Assets:                                                                        
  Beginning of period ...................................    2,700,025,629          2,195,823,438
                                                            --------------         --------------
  End of period .........................................   $3,013,021,180         $2,700,025,629
                                                            ==============         ==============
</TABLE>
                 See Accompanying Notes to Financial Statements.

                                        7

<PAGE>

                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                            FINANCIAL HIGHLIGHTS (b)
                (FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD)

<TABLE>
<CAPTION>
                                                                              MONEY MARKET PORTFOLIO
                                           -----------------------------------------------------------------------------------------
                                                 FOR THE           FOR THE           FOR THE           FOR THE           FOR THE
                                                SIX MONTHS           YEAR             YEAR              YEAR              YEAR
                                                  ENDED             ENDED             ENDED             ENDED             ENDED
                                           FEBRUARY 28, 1998   AUGUST 31, 1997   AUGUST 31, 1996   AUGUST 31, 1995   AUGUST 31, 1994
                                           -----------------   ---------------   ---------------   ---------------   ---------------
                                              (UNAUDITED)

<S>                                             <C>               <C>                <C>               <C>               <C>     
Net asset value, beginning of period .........  $   1.00          $   1.00           $   1.00          $   1.00          $   1.00
                                                --------          --------           --------          --------          --------
Income from investment operations:
  Net investment income ......................    0.0260            0.0510             0.0518            0.0543            0.0334
                                                --------          --------           --------          --------          --------
    Total from investment operations .........    0.0260            0.0510             0.0518            0.0543            0.0334
                                                --------          --------           --------          --------          --------
Less distributions
  Dividends (from net investment income) .....   (0.0260)          (0.0510)           (0.0518)          (0.0543)          (0.0334)
                                                --------          --------           --------          --------          --------
Total distributions ..........................   (0.0260)          (0.0510)           (0.0518)          (0.0543)          (0.0334)
                                                --------          --------           --------          --------          --------
Net asset value, end of period ...............  $   1.00          $   1.00           $   1.00          $   1.00          $   1.00
                                                ========          ========           ========          ========          ========
Total Return .................................   5.37%(c)            5.22%              5.30%             5.57%             3.39%
Ratios /Supplemental Data
  Net assets, end of period ..................  $686,552          $570,018           $524,359          $441,614          $373,745
  Ratios of expenses to average net assets ... .49%(a)(c)           .49%(a)            .48%(a)           .39%(a)           .39%(a)
  Ratios of net investment income to
    average net assets .......................   5.23%(c)            5.10%              5.18%             5.43%             3.34%

<FN>
(a)  Without  the waiver of  advisory  and  transfer  agent fees and without the
     reimbursement  of certain  operating  expenses,  the ratios of  expenses to
     average net assets for the Money Market  Portfolio would have been .63% for
     the six months ended February 28, 1998,  .64%,  .65%, .59% and .60% for the
     years ended August 31, 1997, 1996, 1995 and 1994, respectively.
(b)  Financial  highlights  relate  soley to the Sansom  Street  Class of shares
     within the portfolio.
(c)  Annualized.
</FN>
</TABLE>


                 See Accompanying Notes to Financial Statements.

                                        8

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                          NOTES TO FINANCIAL STATEMENTS
                                FEBRUARY 28, 1998
                                   (UNAUDITED)



NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     The RBB Fund, Inc. (the "Fund") is registered under the Investment  Company
Act of 1940, as amended, as an open-end management  investment company. The Fund
was incorporated in Maryland on February 29, 1988.

     The Fund has authorized capital of thirty billion shares of common stock of
which 14.03 billion shares are currently  classified into eighty-three  classes.
Each class represents an interest in one of twenty-three  investment  portfolios
of the Fund.  The classes have been grouped  into fifteen  separate  "families",
eight of which have begun investment operations: the RBB Family, the BEA Family,
the Sansom Street Family, the Bedford Family, the Cash Preservation  Family, the
Janney  Montgomery Money Family,  the n/i Family and the Boston Partners Family.
The Sansom Street  Family  represents  interests in the Money Market  Portfolio,
which is covered in this report.

              A) SECURITY VALUATION -- Portfolio securities are valued under the
     amortized cost method,  which approximates current market value. Under this
     method,  securities  are valued at cost when  purchased  and  thereafter  a
     constant proportionate  amortization of any discount or premium is recorded
     until  maturity  of the  security.  Regular  review and  monitoring  of the
     valuation  is  performed  in an attempt to avoid  dilution or other  unfair
     results to  shareholders.  The Portfolio  seeks to maintain net asset value
     per share at $1.00.

              B)  SECURITY   TRANSACTIONS  AND  INVESTMENT  INCOME  --  Security
     transactions  are accounted for on the trade date.  The cost of investments
     sold is  determined by use of the specific  identification  method for both
     financial reporting and income tax purposes. Interest income is recorded on
     the accrual basis.  Certain expenses,  principally  distribution,  transfer
     agency  and  printing,  are  class  specific  expenses  and vary by  class.
     Expenses not  directly  attributable  to a specific  portfolio or class are
     allocated  based on  relative  net  assets  of each  portfolio  and  class,
     respectively.

              C)  DISTRIBUTIONS TO SHAREHOLDERS -- Dividends from net investment
     income are declared daily and paid monthly.  Any net realized capital gains
     are distributed at least annually.  Income  distributions  and capital gain
     distributions  are  determined  in accordance  with income tax  regulations
     which may differ from generally accepted accounting principals.

              D) FEDERAL  INCOME TAXES -- No provision is made for Federal taxes
     as it is the Fund's intention to have each portfolio to continue to qualify
     for  and  elect  the  tax  treatment  applicable  to  regulated  investment
     companies   under  the  Internal   Revenue  Code  and  make  the  requisite
     distributions  to its  shareholders  which will be sufficient to relieve it
     from Federal income and excise taxes.

              E)  REPURCHASE  AGREEMENTS  --  Money  market  instruments  may be
     purchased subject to the seller's agreement to repurchase them at an agreed
     upon date and  price.  The  seller  will be  required  on a daily  basis to
     maintain the value of the  securities  subject to the agreement at not less
     than  the  repurchase  price.  The  agreements  are  conditioned  upon  the
     collateral being deposited under the Federal Reserve  book-entry  system or
     with the Fund's custodian or a third party sub-custodian.

              F) USE OF ESTIMATES -- The preparation of financial  statements in
     conformity  with  generally   accepted   accounting   principles   requires
     management  to make  estimates  and  assumption  that  affect the  reported
     amounts of assets and liabilities  and disclosure of contingent  assets and
     liabilities  at the  date of the  financial  statements  and  the  reported
     amounts of  revenues  and  expenses  during the  reporting  period.  Actual
     results could differ from those estimates.


                                        9

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)


NOTE 2. TRANSACTIONS WITH AFFILIATES AND RELATED PARTIES

     Pursuant to Investment Advisory  Agreements,  PNC Institutional  Management
Corporation  ("PIMC")*, a wholly owned subsidiary of PNC Asset Management Group,
Inc.,  which  is in  turn  a  wholly-owned  subsidiary  of  PNC  Bank,  National
Association  ("PNC  Bank"),  serves  as  investment  advisor  for the  portfolio
described  herein.  PNC Bank  serves as the  sub-advisor  for the  Money  Market
Portfolio.

     For its advisory services,  PIMC is entitled to receive the following fees,
computed daily and payable  monthly based on the  portfolio's  average daily net
assets:

                     .45% of first $250 million of net assets;
                     .40% of next $250  million of net assets;
                     .35%  of net  assets  in  excess  of $500 million.

     PIMC may, at its  discretion,  voluntarily  waive all or any portion of its
advisory fee for this  portfolio.  For each class of shares  within a respective
portfolio,  the net advisory fee charged to each class is the same on a relative
basis. For the six months ended February 28, 1998, advisory fees and waivers for
the investment portfolio were as follows:

                  Gross                                         Net
                ADVISORY                                     ADVISORY
                   FEE                  WAIVER                  FEE
               ----------            -----------            ----------
               $5,016,420            $(1,867,833)           $3,148,587

     The  investment  advisor has agreed to  reimburse  each  portfolio  for the
amount, if any, by which the total operating and management  expenses exceed the
cap. For the six months ended  February 28, 1998 the  reimbursed  expenses  were
$273,084 for the Money Market Portfolio.

     PNC Bank,  as  sub-advisor,  receives a fee  directly  from  PIMC,  not the
portfolio.  In addition, PNC Bank serves as custodian for the Fund's portfolios.
PFPC Inc.  ("PFPC"),  an indirect  wholly  owned  subsidiary  of PNC Bank Corp.,
serves as each class's transfer and dividend disbursing agent.

     PFPC may, at its  discretion,  voluntarily  waive all or any portion of its
transfer  agency fee for any class of shares.  For the six months ended February
28, 1998,  transfer  agency fees and waivers for each class of shares within the
investment portfolio were as follows:
                                        GROSS                          NET
                                   TRANSFER AGENCY               TRANSFER AGENCY
                                         FEE          WAIVER           FEE
                                   ---------------    -------    --------------
     Bedford Class                   $  994,000       $    --      $  994,000
     Cash Preservation Class              4,812        (4,504)            308
     Janney Montgomery Scott Class      698,290            --         698,290
     Sansom Street Class                188,351            --         188,351
                                     ----------       -------      ----------
            Total                    $1,885,453       $(4,504)     $1,880,949
                                     ==========       =======      ==========

     The  Fund,  on  behalf  of each  class of  shares  within  this  investment
portfolio,  has  adopted  Distribution  Plans  pursuant  to Rule 12b-1 under the
Investment  Company Act of 1940, as amended,  and has entered into  Distribution
Contracts with Counsellors  Securities Inc.  ("Counsellors"),  which provide for
each class to make monthly payments, based on average net assets, to Counsellors
of up to .65% on an  annualized  basis for the Bedford,  Cash  Preservation  and
Janney  Montgomery  Scott Classes and up to .20% on an annualized  basis for the
Sansom Street Class.

*As of March 31, 1998, PNC Institutional  Management  Corporation has officially
 changed their name to BlackRock Institutional Management Corporation.


                                       10

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)



NOTE 2. TRANSACTIONS WITH AFFILIATES AND RELATED PARTIES (CONTINUED)

     For the six months  ended  February 28,  1998,  distribution  fees for each
class were as follows:

                                                         DISTRIBUTION
                                                              FEE
                                                         ------------
                    Bedford Class                         $3,750,884
                    Cash Preservation Class                      438
                    Janney Montgomery Scott Class          2,291,871
                    Sansom Street Class                      158,746
                                                          ----------
                           Total                          $6,201,939
                                                          ==========

     The Fund has entered into service agreements with banks affiliated with PNC
Bank who render support  services to customers who are the beneficial  owners of
the Sansom Street Class in consideration of the payment of .10% of the daily net
asset value of such shares.  For the six months ended  February 28, 1998 service
organization fees were $281,246 for the Money Market Portfolio.

NOTE 3. CAPITAL SHARES

     Transactions  in capital  shares (at $1.00 per capital share) for each year
were as follows:

                                                    MONEY MARKET PORTFOLIO
                                            -----------------------------------
                                                 FOR THE            FOR THE
                                            SIX MONTHS ENDED      YEAR ENDED
                                            FEBRUARY 28, 1998   AUGUST 31, 1997
                                            -----------------   ---------------
                                               (UNAUDITED)
                                                  VALUE              VALUE
                                            -----------------   ---------------
Shares Sold:
   Bedford Class                             $2,522,717,905     $ 4,513,203,668
   Cash Preservation Class                           26,316             175,000
   Janney Montgomery Scott Class              1,839,610,433       3,087,651,502
   RBB Class                                             --               4,744
   Sansom Street Class                        1,087,883,963      1,965,226,666
Shares issued in reinvestment of dividends:
   Bedford Class                                 33,898,767          55,886,643
   Cash Preservation Class                            5,415              10,748
   Janney Montgomery Scott Class                 18,501,314          29,670,134
   RBB Class                                             --               1,361
   Sansom Street Class                           11,686,521          20,645,930
Shares repurchased:
   Bedford Class                             (2,445,340,436)     (4,285,531,838)
   Cash Preservation Class                          (75,149)           (145,893)
   Janney Montgomery Scott Class             (1,772,888,931)     (2,942,342,585)
   RBB Class                                             --             (67,517)
   Sansom Street Class                         (983,040,666)     (1,940,208,702)
                                             --------------    ---------------
Net increase                                 $  312,985,452     $   504,179,861
                                             ==============     ===============
   Sansom Street Shares authorized            1,000,000,000       1,000,000,000
                                             ==============     ===============


                                       11

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)


NOTE 4. NET ASSETS

     At February 28, 1998, net assets consisted of the following:

           Capital paid-in
              Bedford Class                               $1,504,186,443
              Cash Preservation Class                            198,797
              Janney Montgomery Scott Class                  822,075,114
              Sansom Street Class                            686,561,111
              Other Classes                                          800
           Accumulated net realized loss on investments
              Bedford Class                                         (839)
              Janney Montgomery Scott Class                        1,028
              Sansom Street Class                                 (1,274)
                                                          --------------
                                                          $3,013,021,180
                                                          ==============

NOTE 5. OTHER FINANCIAL HIGHLIGHTS

     The Fund  currently  offers  three  other  classes  of shares  representing
interest in the Money Market  Portfolio:  Bedford,  Cash Preservation and Janney
Montgomery  Scott.  Each class is  marketed  to  different  types of  investors.
Financial  Highlights  of the Cash  Preservation  class is not presented in this
report due to its  immateriality.  Such  information  is available in the annual
report of the Cash Preservation  family. The financial  highlights of certain of
the other classes are as follows:

THE BEDFORD FAMILY
<TABLE>
<CAPTION>
                                                                MONEY MARKET PORTFOLIO
                                           -----------------------------------------------------------------------------------------
                                                FOR THE             FOR THE          FOR THE          FOR THE           FOR THE
                                               SIX MONTHS            YEAR             YEAR              YEAR              YEAR
                                                  ENDED              ENDED            ENDED             ENDED             ENDED
                                           FEBRUARY 28, 1998   AUGUST 31, 1997   AUGUST 31, 1996   AUGUST 31, 1995   AUGUST 31, 1994
                                           -----------------   ---------------   ---------------   ---------------   ---------------
                                              (UNAUDITED)
<S>                                           <C>               <C>               <C>                <C>               <C>     
Net asset value, beginning of period ........ $     1.00        $     1.00        $     1.00         $   1.00          $   1.00
                                              ----------        ----------        ----------         --------          --------
Income from investment operations:
  Net investment income .....................     0.0236            0.0462            0.0469           0.0486            0.0278
                                              ----------        ----------        ----------         --------          --------
    Total from investment operations ........     0.0236            0.0462            0.0469           0.0486            0.0278
                                              ----------        ----------        ----------         --------          --------
Less distributions
  Dividends (from net investment income) ....    (0.0236)          (0.0462)          (0.0469)         (0.0486)          (0.0278)
                                              ----------        ----------        ----------         --------          --------
    Total distributions .....................    (0.0236)          (0.0462)          (0.0469)         (0.0486)          (0.0278)
                                              ----------        ----------        ----------         --------          --------
Net asset value, end of period .............. $     1.00        $     1.00        $     1.00         $   1.00          $   1.00
                                              ==========        ==========        ==========         ========          ========
Total Return ................................     4.87(b)            4.72%             4.79%            4.97%             2.81%
Ratios /Supplemental Data
  Net assets, end of period (000) ........... $1,504,190        $1,392,911        $1,109,334         $935,821          $710,737
  Ratios of expenses to average net assets ..  .97%(a)(b)           .97%(a)           .97%(a)          .96%(a)           .95%(a)
  Ratios of net investment income to 
    average net assets ......................    4.76%(b)          4.62%               4.69%            4.86%             2.78%

<FN>
(a)  Without  the waiver of  advisory  and  administration  fees and without the
     reimbursement  of certain  operating  expenses,  the ratios of  expenses to
     average  net assets for the Money  Market  Portfolio  would have been 1.11%
     annualized for the six months ended February 28, 1998, 1.12%,  1.14%, 1.17%
     and  1.16%  for the years  ended  August  31,  1997,  1996,  1995 and 1994,
     respectively.
(b)  Annualized.

</FN>
</TABLE>

                                       12

<PAGE>


                            THE SANSOM STREET FAMILY
                               THE RBB FUND, INC.
                    NOTES TO FINANCIAL STATEMENTS (CONCLUDED)
                                FEBRUARY 28, 1998
                                   (UNAUDITED)



NOTE 5. OTHER FINANCIAL HIGHLIGHTS (CONTINUED)

THE JANNEY MONTGOMERY SCOTT MONEY FUNDS

<TABLE>
<CAPTION>
                                                                                    MONEY MARKET PORTFOLIO
                                                        ---------------------------------------------------------------------------
                                                                                                                     FOR THE PERIOD
                                                              FOR THE             FOR THE            FOR THE          JUNE 12, 1995
                                                            SIX MONTHS             YEAR               YEAR          (COMMENCEMENT OF
                                                               ENDED               ENDED              ENDED          OPERATIONS) TO
                                                         FEBRUARY 28, 1998    AUGUST 31, 1997    AUGUST 31, 1996     AUGUST 31, 1995
                                                        ------------------    ---------------    ---------------    ----------------
                                                           (UNAUDITED)
                                                     
<S>                                                          <C>                 <C>                 <C>                 <C>     
Net asset value, beginning of period ....................    $   1.00            $   1.00            $   1.00            $   1.00
                                                             --------            --------            --------            --------
Income from investment operations:                                                                
  Net investment income .................................      0.0235              0.0459              0.0465              0.0112
                                                             --------            --------            --------            --------
    Total from investment operations ....................      0.0235              0.0459              0.0465              0.0112
                                                             --------            --------            --------            --------
Less distributions                                                                                
  Dividends (from net investment income) ................     (0.0235)            (0.0459)            (0.0465)            (0.0112)
                                                             --------            --------            --------            --------
    Total distributions .................................     (0.0235)            (0.0459)            (0.0465)            (0.0112)
                                                             --------            --------            --------            --------
Net asset value, end of period ..........................    $   1.00            $   1.00            $   1.00            $   1.00
                                                             ========            ========            ========            ========
Total Return ............................................     4.84%(b)              4.69%               4.76%             5.30%(b)
Ratios /Supplemental Data                                                                         
  Net assets, end of period (000) .......................    $822,080            $736,855            $561,865            $443,645
  Ratios of expenses to average net assets ..............  1.00%(a)(b)            1.00%(a)            1.00%(a)         1.00%(a)(b)
  Ratios of net investment income to averagenet assets ..     4.76%(b)              4.59%               4.65%             5.04%(b)
                                                         
<FN>
(a)  Without the waiver of advisory,  administration and transfer agent fees and
     without the  reimbursement  of certain  operating  expenses,  the ratios of
     expenses to average net assets for the Money  Market  Portfolio  would have
     been 1.21% for six months ended February 28, 1998,  1.22%,  1.23% and 1.23%
     for the years ended August 31, 1997, 1996 and 1995, respectively.
(b)  Annualized.
</FN>
</TABLE>


                                       13

<PAGE>




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