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001 A000000 MONTGOMERY STREET INCOME SECURITIES, INC.
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002 A000000 101 CALIFORNIA STREET, SUITE 4100
002 B000000 SAN FRANCISCO
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008 A000001 SCUDDER KEMPER INVESTMENTS
008 B000001 A
008 C000001 801-252
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10154
008 D040001 0010
010 A000001 SCUDDER KEMPER INVESTMENTS
010 C010001 BOSTON
010 C020001 MA
010 C030001 02110
010 C040001 4103
012 A000001 STATE STREET BANK & TRUST COMPANY
012 B000001 85-5003
012 C010001 BOSTON
012 C020001 MA
012 C030001 02102
013 A000001 ERNST & YOUNG LLP
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<PAGE> PAGE 2
013 B020001 MA
013 B030001 02116
014 A000001 SCUDDER INVESTOR SERVICES, INC.
014 B000001 8-298
014 A000002 GRUNTAL & CO., INC.
014 B000002 8-31022
014 A000003 GMS GROUP LLC (A GRUNTAL AFFILIATE)
014 B000003 8-23936
014 A000004 ZURICH CAPITAL MARKETS
014 B000004 8-49827
014 A000005 BANK HANDLOWY
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022 A000001 GENERAL ELECTRIC CREDIT CORP.
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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SIGNATURE THOMAS F. MCDONOUGH
TITLE VICE PRESIDENT
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from the
Montgomery Street Income Securities, Inc. Semiannual Report for the six months
ended 6/30/98 and is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<SERIES>
<NUMBER> 0
<NAME> Montgomery Street Income Securities, Inc.
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 206,392,433
<INVESTMENTS-AT-VALUE> 212,863,303
<RECEIVABLES> 6,838,136
<ASSETS-OTHER> 3,413
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 219,704,852
<PAYABLE-FOR-SECURITIES> 8,003,658
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 190,875
<TOTAL-LIABILITIES> 8,194,533
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 199,988,981
<SHARES-COMMON-STOCK> 10,232,751
<SHARES-COMMON-PRIOR> 10,219,267
<ACCUMULATED-NII-CURRENT> 3,650,545
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,399,965
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 6,470,828
<NET-ASSETS> 211,510,319
<DIVIDEND-INCOME> 184,499
<INTEREST-INCOME> 7,493,055
<OTHER-INCOME> 0
<EXPENSES-NET> 720,722
<NET-INVESTMENT-INCOME> 6,956,832
<REALIZED-GAINS-CURRENT> 1,562,197
<APPREC-INCREASE-CURRENT> (1,106,146)
<NET-CHANGE-FROM-OPS> 7,412,883
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3,474,489)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
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<NET-CHANGE-IN-ASSETS> 4,194,617
<ACCUMULATED-NII-PRIOR> 168,202
<ACCUMULATED-GAINS-PRIOR> (162,232)
<OVERDISTRIB-NII-PRIOR> 0
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<GROSS-ADVISORY-FEES> 505,319
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 720,722
<AVERAGE-NET-ASSETS> 209,942,346
<PER-SHARE-NAV-BEGIN> 20.29
<PER-SHARE-NII> 0.68
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</TABLE>
