<PAGE> PAGE 1
000 A000000 09/30/97
000 C000000 0000893247
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 BEAR STEARNS INVESTMENT TRUST
001 B000000 811-7290
001 C000000 3027912919
002 A000000 245 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10167
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 1
007 C010100 1
007 C020100 EMERGING MARKETS DEBT PORTFOLIO
007 C030100 N
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 BEAR STEARNS FUNDS MANAGEMENT INC.
008 B00AA01 A
008 C00AA01 801-29862
008 D01AA01 NEW YORK
008 D02AA01 NY
008 D03AA01 10167
010 A00AA01 BEAR STEARNS FUNDS MANAGEMENT INC.
010 B00AA01 801-29862
010 C01AA01 NEW YORK
010 C02AA01 NY
010 C03AA01 10167
010 A00AA02 PFPC INC.
010 B00AA02 85-1196
010 C01AA02 WILMINGTON
010 C02AA02 DE
010 C03AA02 19809
011 A00AA01 BEAR, STEARNS & CO. INC.
<PAGE> PAGE 2
011 B00AA01 8-35008
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10167
012 A00AA01 PFPC INC.
012 B00AA01 85-1196
012 C01AA01 WILMINGTON
012 C02AA01 DE
012 C03AA01 19809
013 A00AA01 DELOITTE & TOUCHE LLP
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10281
013 B04AA01 1434
014 A00AA01 BEAR STEARNS & CO., INC.
014 B00AA01 8-01-29862
015 A00AA01 BROWN BROTHERS HARRIMAN & CO
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02109
015 E02AA01 X
015 A00AA02 BROWN BROTHERS HARRIMAN & CO.
015 B00AA02 C
015 C01AA02 BOSTON
015 C02AA02 MA
015 C03AA02 02109
015 E04AA02 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 8
019 C00AA00 THEBEARSTE
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 BROWN BROTHER HARRIMAN & CO.
022 B000001 13-4973745
022 C000001 14995
022 D000001 15070
022 A000002 SALOMON BROTHERS, INC.
022 B000002 13-3082694
022 C000002 8361
022 D000002 6323
<PAGE> PAGE 3
022 A000003 J.P. MORGAN SECURITIES
022 B000003 13-3224016
022 C000003 4281
022 D000003 6622
022 A000004 PARIBAS CORP.
022 B000004 13-3235334
022 C000004 2625
022 D000004 4102
022 A000005 GUARNATIA (GLOBAL)
022 B000005 00-0000000
022 C000005 2228
022 D000005 1665
022 A000006 GOLDMAN SACHS & CO.
022 B000006 13-5108880
022 C000006 1497
022 D000006 2385
022 A000007 INTERNATIONALE NEDERLANDEN GROUP
022 B000007 00-0000000
022 C000007 1208
022 D000007 1700
022 A000008 MORGAN STANLEY & CO., INC.
022 B000008 13-2655998
022 C000008 1019
022 D000008 1088
022 A000009 CHASE MANHATTAN BANK
022 B000009 13-3112953
022 C000009 1679
022 D000009 0
022 A000010 MERRILL LYNCH
022 B000010 13-5674085
022 C000010 0
022 D000010 898
023 C000000 39630
023 D000000 41562
024 00AA00 N
025 D00AA01 0
025 D00AA02 0
025 D00AA03 0
025 D00AA04 0
025 D00AA05 0
025 D00AA06 0
025 D00AA07 0
025 D00AA08 0
026 A000000 N
026 B000000 Y
026 C000000 Y
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
<PAGE> PAGE 4
026 H000000 N
027 000000 Y
077 A000000 Y
077 B000000 N
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 Y
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 C00AA00 0
081 B00AA00 0
082 B00AA00 0
083 B00AA00 0
084 B00AA00 0
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
086 A01AA00 0
086 A02AA00 0
086 B01AA00 0
086 B02AA00 0
086 C01AA00 0
086 C02AA00 0
086 D01AA00 0
086 D02AA00 0
086 E01AA00 0
086 E02AA00 0
086 F01AA00 0
086 F02AA00 0
<PAGE> PAGE 5
028 A010100 1029
028 A020100 0
028 A030100 0
028 A040100 448
028 B010100 496
028 B020100 0
028 B030100 0
028 B040100 1380
028 C010100 565
028 C020100 411
028 C030100 0
028 C040100 851
028 D010100 508
028 D020100 0
028 D030100 0
028 D040100 954
028 E010100 737
028 E020100 0
028 E030100 0
028 E040100 202
028 F010100 1084
028 F020100 427
028 F030100 0
028 F040100 1553
028 G010100 4419
028 G020100 838
028 G030100 0
028 G040100 5388
028 H000100 3234
029 000100 Y
030 A000100 40
030 B000100 3.75
030 C000100 0.00
031 A000100 9
031 B000100 0
032 000100 22
033 000100 9
034 000100 Y
035 000100 1
036 A000100 Y
036 B000100 0
037 000100 N
038 000100 0
039 000100 N
040 000100 Y
041 000100 Y
042 A000100 0
042 B000100 0
042 C000100 0
042 D000100 100
042 E000100 0
<PAGE> PAGE 6
042 F000100 0
042 G000100 0
042 H000100 0
043 000100 75
044 000100 0
045 000100 Y
046 000100 N
047 000100 Y
048 000100 0.000
048 A010100 50000
048 A020100 1.150
048 B010100 50000
048 B020100 1.000
048 C010100 0
048 C020100 0.000
048 D010100 0
048 D020100 0.000
048 E010100 0
048 E020100 0.000
048 F010100 0
048 F020100 0.000
048 G010100 0
048 G020100 0.000
048 H010100 0
048 H020100 0.000
048 I010100 0
048 I020100 0.000
048 J010100 0
048 J020100 0.000
048 K010100 100000
048 K020100 0.700
049 000100 N
050 000100 N
051 000100 N
052 000100 N
053 A000100 Y
053 B000100 Y
053 C000100 N
054 A000100 Y
054 B000100 Y
054 C000100 N
054 D000100 N
054 E000100 N
054 F000100 N
054 G000100 N
054 H000100 N
054 I000100 N
054 J000100 Y
054 K000100 N
054 L000100 N
054 M000100 Y
<PAGE> PAGE 7
054 N000100 N
054 O000100 N
055 A000100 Y
055 B000100 N
056 000100 Y
057 000100 N
058 A000100 N
059 000100 Y
060 A000100 N
060 B000100 N
061 000100 1000
062 A000100 Y
062 B000100 0.0
062 C000100 0.0
062 D000100 0.0
062 E000100 0.0
062 F000100 0.0
062 G000100 0.0
062 H000100 0.0
062 I000100 0.0
062 J000100 0.0
062 K000100 0.0
062 L000100 6.4
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 92.0
062 R000100 0.0
063 A000100 0
063 B000100 15.6
064 A000100 Y
064 B000100 N
066 A000100 N
067 000100 N
068 A000100 N
068 B000100 Y
069 000100 N
070 A010100 Y
070 A020100 N
070 B010100 Y
070 B020100 N
070 C010100 Y
070 C020100 N
070 D010100 Y
070 D020100 N
070 E010100 Y
070 E020100 N
070 F010100 Y
070 F020100 N
070 G010100 Y
<PAGE> PAGE 8
070 G020100 N
070 H010100 Y
070 H020100 N
070 I010100 Y
070 I020100 N
070 J010100 Y
070 J020100 N
070 K010100 Y
070 K020100 N
070 L010100 Y
070 L020100 Y
070 M010100 Y
070 M020100 N
070 N010100 Y
070 N020100 N
070 O010100 Y
070 O020100 N
070 P010100 N
070 P020100 N
070 Q010100 Y
070 Q020100 N
070 R010100 Y
070 R020100 N
071 A000100 24635
071 B000100 25144
071 C000100 36555
071 D000100 67
072 A000100 6
072 B000100 1741
072 C000100 0
072 D000100 0
072 E000100 0
072 F000100 222
072 G000100 0
072 H000100 0
072 I000100 25
072 J000100 22
072 K000100 0
072 L000100 32
072 M000100 10
072 N000100 36
072 O000100 0
072 P000100 0
072 Q000100 36
072 R000100 16
072 S000100 34
072 T000100 75
072 U000100 27
072 V000100 0
072 W000100 9
072 X000100 544
<PAGE> PAGE 9
072 Y000100 149
072 Z000100 1346
072AA000100 2818
072BB000100 145
072CC010100 2368
072CC020100 0
072DD010100 1209
072DD020100 119
072EE000100 0
073 A010100 0.4200
073 A020100 0.4100
073 B000100 0.0000
073 C000100 0.0000
074 A000100 0
074 B000100 0
074 C000100 0
074 D000100 37442
074 E000100 0
074 F000100 0
074 G000100 0
074 H000100 0
074 I000100 2605
074 J000100 956
074 K000100 0
074 L000100 817
074 M000100 70
074 N000100 41890
074 O000100 1022
074 P000100 49
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 124
074 S000100 0
074 T000100 40695
074 U010100 2875
074 U020100 325
074 V010100 12.72
074 V020100 12.70
074 W000100 0.0000
074 X000100 1439
074 Y000100 0
075 A000100 0
075 B000100 38678
076 000100 0.00
SIGNATURE KATHY THREN
TITLE COUNSEL
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000893247
<NAME> BEAR STEARNS INVESTMENT TRUST
<SERIES>
<NUMBER> 011
<NAME> EMERGING MARKETS DEBT PORTFOLIO - CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1997
<PERIOD-END> SEP-30-1997
<INVESTMENTS-AT-COST> 35041512
<INVESTMENTS-AT-VALUE> 40046582
<RECEIVABLES> 1773158
<ASSETS-OTHER> 70322
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 41890062
<PAYABLE-FOR-SECURITIES> 1021653
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 173124
<TOTAL-LIABILITIES> 1194777
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 35066081
<SHARES-COMMON-STOCK> 3200054
<SHARES-COMMON-PRIOR> 3210788
<ACCUMULATED-NII-CURRENT> 36335
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 587799
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5005070
<NET-ASSETS> 40695285
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1740987
<OTHER-INCOME> 0
<EXPENSES-NET> 395094
<NET-INVESTMENT-INCOME> 1345893
<REALIZED-GAINS-CURRENT> 2672664
<APPREC-INCREASE-CURRENT> 2368010
<NET-CHANGE-FROM-OPS> 6386567
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1327488
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 365143
<NUMBER-OF-SHARES-REDEEMED> 443622
<SHARES-REINVESTED> 67745
<NET-CHANGE-IN-ASSETS> 4927677
<ACCUMULATED-NII-PRIOR> 17930
<ACCUMULATED-GAINS-PRIOR> (2084865)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 221802
<INTEREST-EXPENSE> 407
<GROSS-EXPENSE> 544102
<AVERAGE-NET-ASSETS> 35292296
<PER-SHARE-NAV-BEGIN> 11.14
<PER-SHARE-NII> .43
<PER-SHARE-GAIN-APPREC> 1.57
<PER-SHARE-DIVIDEND> (.42)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.72
<EXPENSE-RATIO> 2.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000893247
<NAME> BEAR STEARNS INVESTMENT TRUST
<SERIES>
<NUMBER> 012
<NAME> EMERGING MARKETS DEBT PORTFOLIO - CLASS C
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1997
<PERIOD-END> SEP-30-1997
<INVESTMENTS-AT-COST> 35041512
<INVESTMENTS-AT-VALUE> 40046582
<RECEIVABLES> 1773158
<ASSETS-OTHER> 70322
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 41890062
<PAYABLE-FOR-SECURITIES> 1021653
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 173124
<TOTAL-LIABILITIES> 1194777
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 35066081
<SHARES-COMMON-STOCK> 3200054
<SHARES-COMMON-PRIOR> 3210788
<ACCUMULATED-NII-CURRENT> 36335
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 587799
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5005070
<NET-ASSETS> 40695285
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1740987
<OTHER-INCOME> 0
<EXPENSES-NET> 395094
<NET-INVESTMENT-INCOME> 1345893
<REALIZED-GAINS-CURRENT> 2672664
<APPREC-INCREASE-CURRENT> 2368010
<NET-CHANGE-FROM-OPS> 6386567
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1327488
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 365143
<NUMBER-OF-SHARES-REDEEMED> 443622
<SHARES-REINVESTED> 67745
<NET-CHANGE-IN-ASSETS> 4927677
<ACCUMULATED-NII-PRIOR> 17930
<ACCUMULATED-GAINS-PRIOR> (2084865)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 221802
<INTEREST-EXPENSE> 407
<GROSS-EXPENSE> 544102
<AVERAGE-NET-ASSETS> 3389168
<PER-SHARE-NAV-BEGIN> 11.14
<PER-SHARE-NII> .41
<PER-SHARE-GAIN-APPREC> 1.56
<PER-SHARE-DIVIDEND> (.41)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.70
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>