<TABLE> <S> <C>
<PAGE>
<ARTICLE> BD
<LEGEND>
THIS SCHEDULE CONTAINS RESTATED 1999 SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE CONSOLIDATED STATEMENT OF INCOME AND CONSOLIDATED STATEMENT OF
FINANCIAL CONDITION IN THE COMPANY'S QUARTERLY REPORT ON FORM 10Q FOR THE
QUARTERLY PERIOD ENDED SEPTEMBER 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> JAN-01-1999
<PERIOD-END> SEP-30-1999
<CASH> 265,471
<RECEIVABLES> 110,533
<SECURITIES-RESALE> 0
<SECURITIES-BORROWED> 0
<INSTRUMENTS-OWNED> 512,237
<PP&E> 22,198
<TOTAL-ASSETS> 1,001,943
<SHORT-TERM> 7,268
<PAYABLES> 112,869
<REPOS-SOLD> 10,269
<SECURITIES-LOANED> 0
<INSTRUMENTS-SOLD> 412,134
<LONG-TERM> 0
0
0
<COMMON> 1,218
<OTHER-SE> 458,185
<TOTAL-LIABILITY-AND-EQUITY> 1,001,943
<TRADING-REVENUE> 577,469
<INTEREST-DIVIDENDS> 14,425
<COMMISSIONS> 11,688
<INVESTMENT-BANKING-REVENUES> 0
<FEE-REVENUE> 14,909
<INTEREST-EXPENSE> 7,393
<COMPENSATION> 181,544
<INCOME-PRETAX> 224,451
<INCOME-PRE-EXTRAORDINARY> 224,451
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 148,733
<EPS-BASIC> 1.24
<EPS-DILUTED> 1.19
</TABLE>