<ARTICLE> 7
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET OF ARCH CAPITAL GROUP LTD AND ITS SUBSIDIARY AT
SEPTEMBER 30, 2000 AND THE RELATED STATEMENT OF INCOME, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               SEP-30-2000
<DEBT-HELD-FOR-SALE>                            94,838
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                     112,860
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                                 254,734
<CASH>                                          15,756
<RECOVER-REINSURE>                                   0
<DEFERRED-ACQUISITION>                               0
<TOTAL-ASSETS>                                 277,011
<POLICY-LOSSES>                                      0
<UNEARNED-PREMIUMS>                                  0
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                                      0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           172
<OTHER-SE>                                     268,254
<TOTAL-LIABILITY-AND-EQUITY>                   277,011
<PREMIUMS>                                      87,530
<INVESTMENT-INCOME>                             12,906
<INVESTMENT-GAINS>                              29,661
<OTHER-INCOME>                                   2,191
<BENEFITS>                                      76,263
<UNDERWRITING-AMORTIZATION>                     26,756
<UNDERWRITING-OTHER>                             6,907
<INCOME-PRETAX>                                 22,362
<INCOME-TAX>                                    18,030
<INCOME-CONTINUING>                              5,515<F1>
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,515<F1>
<EPS-BASIC>                                       0.41<F1>
<EPS-DILUTED>                                     0.41<F1>
<RESERVE-OPEN>                                 308,628
<PROVISION-CURRENT>                             76,262
<PROVISION-PRIOR>                                    0
<PAYMENTS-CURRENT>                              76,263
<PAYMENTS-PRIOR>                               308,628
<RESERVE-CLOSE>                                      0<F2>
<CUMULATIVE-DEFICIENCY>                              0
<FN>
<F1>Incudes equity in net income of investees of $1,183. Net income excludes Other
Comprehensive income (loss) which the Company adopted 1st Qtr 1998 in a one
financial statement approach. Comprehensive loss was $19,690 or $1.47 per share
Basic and Diluted.
<F2>Loss reserves net of reinsurance.
</FN>