<PAGE> PAGE 1
000 A000000 06/30/96
000 C000000 0000060335
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 2.2
000 J000000 U
001 A000000 CGM TRUST
001 B000000 811-82
001 C000000 6178597714
002 A000000 ONE INTERNATIONAL PLACE
002 B000000 BOSTON
002 C000000 MA
002 D010000 02110
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 4
007 C010100 1
007 C020100 CGM MUTUAL FUND
007 C030100 N
007 C010200 2
007 C020200 CGM FIXED INCOME FUND
007 C030200 N
007 C010300 3
007 C020300 CGM AMERICAN TAX FREE FUND
007 C030300 N
007 C010400 4
007 C020400 CGM REALTY FUND
007 C030400 N
020 A000001 MERRILL LYNCH PIERCE FENNER & SMITH
020 B000001 13-5674085
020 C000001 184
020 A000002 WERTHEIM & CO., INC.
020 B000002 13-2697272
020 C000002 163
020 A000003 ALEX BROWN & SONS
020 B000003 52-0256630
020 C000003 158
020 A000004 GOLDMAN SACHS & CO.
020 B000004 13-5108880
020 C000004 137
020 A000005 DONLADSON LUFKIN JENRETTE & CO.
020 B000005 13-5033225
020 C000005 115
020 A000006 PAINE WEBBER INC.
020 B000006 13-2638166
<PAGE> PAGE 2
020 C000006 96
020 A000007 NATWEST SECURITIES CORP.
020 C000007 96
020 A000008 LEHMAN BROTHERS
020 C000008 71
020 A000009 DEAN WITTER REYNOLDS INC.
020 C000009 69
020 A000010 ROBINSON HUMPHREY
020 B000010 58-1472560
020 C000010 66
021 000000 2414
022 A000001 SALOMAN BROTHERS INC.
022 B000001 13-3082694
022 C000001 504087
022 D000001 302604
022 A000002 AMERICAN EXPRESS CO.
022 B000002 13-2518466
022 C000002 527715
022 D000002 0
022 A000003 MERRILL LYNCH PIERCE FENNER & SMITH, INC.
022 B000003 13-5674085
022 C000003 84480
022 D000003 129521
022 A000004 WERTHEIM & CO., INC.
022 B000004 13-2697272
022 C000004 39683
022 D000004 125014
022 A000005 ALEX BROWN & SONS
022 B000005 52-0256630
022 C000005 119780
022 D000005 29521
022 A000006 DONALDSON LUFKIN JENRETTE & CO.
022 B000006 13-5033225
022 C000006 75253
022 D000006 52944
022 A000007 GOLDMAN SACHS & CO.
022 B000007 13-5108880
022 C000007 59684
022 D000007 54524
022 A000008 ROBINSON HUMPHREY
022 B000008 58-1472560
022 C000008 5183
022 D000008 81820
022 A000009 PAINE WEBBER INC.
022 B000009 13-2638166
022 C000009 42578
022 D000009 38696
022 A000010 LEHMAN BROTHERS
022 C000010 33595
022 D000010 45720
023 C000000 2280096
<PAGE> PAGE 3
023 D000000 1463278
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 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
077 Q020000 N
077 Q030000 N
078 000000 N
024 000100 N
028 A010100 11363
028 A020100 0
028 A030100 0
028 A040100 20544
028 B010100 9292
028 B020100 0
028 B030100 0
028 B040100 28883
028 C010100 7657
028 C020100 0
028 C030100 0
028 C040100 15552
028 D010100 9948
028 D020100 5425
028 D030100 0
028 D040100 16780
028 E010100 7249
028 E020100 0
028 E030100 0
028 E040100 21767
028 F010100 6536
028 F020100 0
028 F030100 0
028 F040100 18221
028 G010100 52045
028 G020100 5425
028 G030100 0
028 G040100 121747
028 H000100 0
<PAGE> PAGE 4
055 A000100 N
055 B000100 N
056 000100 Y
057 000100 N
062 A000100 N
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 0.0
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.0
070 A010100 Y
070 A020100 N
070 B010100 N
070 B020100 N
070 C010100 N
070 C020100 N
070 D010100 N
070 D020100 N
070 E010100 N
070 E020100 N
070 F010100 N
070 F020100 N
070 G010100 N
070 G020100 N
070 H010100 N
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 N
070 K010100 Y
070 K020100 N
070 L010100 Y
070 L020100 N
070 M010100 N
070 M020100 N
070 N010100 N
070 N020100 N
070 O010100 Y
<PAGE> PAGE 5
070 O020100 N
070 P010100 N
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
071 A000100 1597778
071 B000100 1388715
071 C000100 993376
071 D000100 140
072 A000100 6
072 B000100 9246
072 C000100 8729
072 D000100 0
072 E000100 0
072 F000100 3937
072 G000100 42
072 H000100 0
072 I000100 950
072 J000100 92
072 K000100 0
072 L000100 55
072 M000100 55
072 N000100 22
072 O000100 0
072 P000100 0
072 Q000100 0
072 R000100 16
072 S000100 30
072 T000100 0
072 U000100 0
072 V000100 0
072 W000100 8
072 X000100 5207
072 Y000100 0
072 Z000100 12768
072AA000100 35008
072BB000100 0
072CC010100 17575
072CC020100 0
072DD010100 6061
072DD020100 0
072EE000100 0
073 A010100 0.1600
073 A020100 0.0000
073 B000100 0.0000
073 C000100 0.0000
074 A000100 97
074 B000100 0
074 C000100 238733
<PAGE> PAGE 6
074 D000100 48835
074 E000100 16088
074 F000100 841454
074 G000100 0
074 H000100 0
074 I000100 0
074 J000100 3928
074 K000100 0
074 L000100 4248
074 M000100 0
074 N000100 1153383
074 O000100 1557
074 P000100 678
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 1696
074 S000100 0
074 T000100 1149452
074 U010100 37126
074 U020100 0
074 V010100 30.96
074 V020100 0.00
074 W000100 0.0000
074 X000100 72952
074 Y000100 0
075 A000100 0
075 B000100 1164210
076 000100 0.00
024 000200 Y
025 A000201 LEHMAN BROTHERS HOLDINGS, INC.
025 C000201 D
025 D000201 1051
025 D000202 0
025 D000203 0
025 D000204 0
025 D000205 0
025 D000206 0
025 D000207 0
025 D000208 0
028 A010200 602
028 A020200 0
028 A030200 0
028 A040200 611
028 B010200 899
028 B020200 123
028 B030200 0
028 B040200 744
028 C010200 667
028 C020200 127
<PAGE> PAGE 7
028 C030200 0
028 C040200 538
028 D010200 913
028 D020200 132
028 D030200 0
028 D040200 619
028 E010200 1476
028 E020200 141
028 E030200 0
028 E040200 704
028 F010200 629
028 F020200 147
028 F030200 0
028 F040200 398
028 G010200 5186
028 G020200 670
028 G030200 0
028 G040200 3614
028 H000200 0
055 A000200 N
055 B000200 N
056 000200 Y
057 000200 N
062 A000200 Y
062 B000200 8.3
062 C000200 0.0
062 D000200 0.0
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 0.5
062 J000200 0.0
062 K000200 0.0
062 L000200 0.0
062 M000200 0.0
062 N000200 0.0
062 O000200 0.0
062 P000200 49.1
062 Q000200 0.0
062 R000200 42.1
063 A000200 0
063 B000200 12.7
064 A000200 N
064 B000200 N
070 A010200 Y
070 A020200 N
070 B010200 N
070 B020200 N
070 C010200 Y
070 C020200 N
<PAGE> PAGE 8
070 D010200 N
070 D020200 N
070 E010200 N
070 E020200 N
070 F010200 N
070 F020200 N
070 G010200 N
070 G020200 N
070 H010200 N
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 Y
070 J020200 N
070 K010200 Y
070 K020200 N
070 L010200 Y
070 L020200 N
070 M010200 N
070 M020200 N
070 N010200 N
070 N020200 N
070 O010200 Y
070 O020200 N
070 P010200 N
070 P020200 N
070 Q010200 N
070 Q020200 N
070 R010200 N
070 R020200 N
071 A000200 33618
071 B000200 27469
071 C000200 30662
071 D000200 90
072 A000200 6
072 B000200 926
072 C000200 259
072 D000200 0
072 E000200 0
072 F000200 93
072 G000200 5
072 H000200 0
072 I000200 29
072 J000200 26
072 K000200 0
072 L000200 12
072 M000200 11
072 N000200 11
072 O000200 0
072 P000200 0
072 Q000200 0
<PAGE> PAGE 9
072 R000200 15
072 S000200 17
072 T000200 0
072 U000200 8
072 V000200 0
072 W000200 0
072 X000200 227
072 Y000200 84
072 Z000200 1042
072AA000200 2676
072BB000200 0
072CC010200 0
072CC020200 1095
072DD010200 818
072DD020200 0
072EE000200 0
073 A010200 0.2900
073 A020200 0.0000
073 B000200 0.0000
073 C000200 0.0000
074 A000200 4
074 B000200 0
074 C000200 3150
074 D000200 17609
074 E000200 10467
074 F000200 3102
074 G000200 0
074 H000200 0
074 I000200 10
074 J000200 1064
074 K000200 0
074 L000200 501
074 M000200 11
074 N000200 35918
074 O000200 0
074 P000200 6
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 73
074 S000200 0
074 T000200 35839
074 U010200 2974
074 U020200 0
074 V010200 12.05
074 V020200 0.00
074 W000200 0.0000
074 X000200 2391
074 Y000200 0
075 A000200 0
<PAGE> PAGE 10
075 B000200 33849
076 000200 0.00
028 A010300 105
028 A020300 0
028 A030300 0
028 A040300 139
028 B010300 198
028 B020300 46
028 B030300 0
028 B040300 120
028 C010300 127
028 C020300 45
028 C030300 0
028 C040300 122
028 D010300 145
028 D020300 45
028 D030300 0
028 D040300 269
028 E010300 327
028 E020300 45
028 E030300 0
028 E040300 254
028 F010300 113
028 F020300 46
028 F030300 0
028 F040300 152
028 G010300 1015
028 G020300 227
028 G030300 0
028 G040300 1056
028 H000300 0
055 A000300 N
055 B000300 N
056 000300 Y
057 000300 N
062 A000300 Y
062 B000300 0.0
062 C000300 0.0
062 D000300 0.0
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 4.8
062 J000300 0.0
062 K000300 0.0
062 L000300 0.0
062 M000300 0.0
062 N000300 0.0
062 O000300 94.0
062 P000300 0.0
<PAGE> PAGE 11
062 Q000300 0.0
062 R000300 1.2
063 A000300 0
063 B000300 13.0
064 A000300 N
064 B000300 N
070 A010300 Y
070 A020300 N
070 B010300 N
070 B020300 N
070 C010300 Y
070 C020300 N
070 D010300 N
070 D020300 N
070 E010300 Y
070 E020300 N
070 F010300 N
070 F020300 N
070 G010300 Y
070 G020300 N
070 H010300 N
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
070 J020300 N
070 K010300 Y
070 K020300 N
070 L010300 N
070 L020300 N
070 M010300 N
070 M020300 N
070 N010300 N
070 N020300 N
070 O010300 Y
070 O020300 N
070 P010300 N
070 P020300 N
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000300 8789
071 B000300 8929
071 C000300 11315
071 D000300 78
072 A000300 6
072 B000300 352
072 C000300 0
072 D000300 0
072 E000300 0
<PAGE> PAGE 12
072 F000300 35
072 G000300 2
072 H000300 0
072 I000300 14
072 J000300 28
072 K000300 0
072 L000300 9
072 M000300 10
072 N000300 10
072 O000300 0
072 P000300 0
072 Q000300 0
072 R000300 10
072 S000300 12
072 T000300 0
072 U000300 0
072 V000300 0
072 W000300 0
072 X000300 130
072 Y000300 130
072 Z000300 352
072AA000300 0
072BB000300 253
072CC010300 0
072CC020300 363
072DD010300 294
072DD020300 0
072EE000300 0
073 A010300 0.2400
073 A020300 0.0000
073 B000300 0.0000
073 C000300 0.0000
074 A000300 4
074 B000300 0
074 C000300 555
074 D000300 10786
074 E000300 0
074 F000300 0
074 G000300 0
074 H000300 0
074 I000300 0
074 J000300 0
074 K000300 0
074 L000300 206
074 M000300 0
074 N000300 11551
074 O000300 0
074 P000300 0
074 Q000300 0
074 R010300 0
074 R020300 0
<PAGE> PAGE 13
074 R030300 0
074 R040300 68
074 S000300 0
074 T000300 11483
074 U010300 1232
074 U020300 0
074 V010300 9.32
074 V020300 0.00
074 W000300 0.0000
074 X000300 995
074 Y000300 0
075 A000300 0
075 B000300 11567
076 000300 0.00
028 A010400 12627
028 A020400 0
028 A030400 0
028 A040400 1568
028 B010400 5122
028 B020400 0
028 B030400 0
028 B040400 1900
028 C010400 4345
028 C020400 0
028 C030400 0
028 C040400 2629
028 D010400 3298
028 D020400 658
028 D030400 0
028 D040400 1704
028 E010400 5039
028 E020400 0
028 E030400 0
028 E040400 2401
028 F010400 2964
028 F020400 0
028 F030400 0
028 F040400 868
028 G010400 33395
028 G020400 658
028 G030400 0
028 G040400 11070
028 H000400 0
055 A000400 N
055 B000400 N
056 000400 Y
057 000400 N
062 A000400 N
062 B000400 0.0
062 C000400 0.0
062 D000400 0.0
<PAGE> PAGE 14
062 E000400 0.0
062 F000400 0.0
062 G000400 0.0
062 H000400 0.0
062 I000400 0.0
062 J000400 0.0
062 K000400 0.0
062 L000400 0.0
062 M000400 0.0
062 N000400 0.0
062 O000400 0.0
062 P000400 0.0
062 Q000400 0.0
062 R000400 0.0
070 A010400 Y
070 A020400 N
070 B010400 Y
070 B020400 N
070 C010400 Y
070 C020400 N
070 D010400 Y
070 D020400 N
070 E010400 Y
070 E020400 N
070 F010400 Y
070 F020400 N
070 G010400 Y
070 G020400 N
070 H010400 Y
070 H020400 N
070 I010400 N
070 I020400 N
070 J010400 Y
070 J020400 N
070 K010400 Y
070 K020400 N
070 L010400 N
070 L020400 N
070 M010400 N
070 M020400 N
070 N010400 N
070 N020400 N
070 O010400 Y
070 O020400 N
070 P010400 N
070 P020400 N
070 Q010400 N
070 Q020400 N
070 R010400 N
070 R020400 N
071 A000400 40456
<PAGE> PAGE 15
071 B000400 16307
071 C000400 64833
071 D000400 25
072 A000400 6
072 B000400 19
072 C000400 2193
072 D000400 0
072 E000400 0
072 F000400 278
072 G000400 9
072 H000400 0
072 I000400 55
072 J000400 33
072 K000400 0
072 L000400 22
072 M000400 12
072 N000400 14
072 O000400 0
072 P000400 0
072 Q000400 0
072 R000400 13
072 S000400 21
072 T000400 0
072 U000400 7
072 V000400 0
072 W000400 0
072 X000400 464
072 Y000400 137
072 Z000400 1885
072AA000400 2532
072BB000400 0
072CC010400 581
072CC020400 0
072DD010400 770
072DD020400 0
072EE000400 0
073 A010400 0.1300
073 A020400 0.0000
073 B000400 0.0000
073 C000400 0.0000
074 A000400 4
074 B000400 0
074 C000400 180
074 D000400 0
074 E000400 0
074 F000400 74357
074 G000400 0
074 H000400 0
074 I000400 0
074 J000400 51
074 K000400 0
<PAGE> PAGE 16
074 L000400 606
074 M000400 40
074 N000400 75238
074 O000400 206
074 P000400 41
074 Q000400 0
074 R010400 0
074 R020400 0
074 R030400 0
074 R040400 85
074 S000400 0
074 T000400 74906
074 U010400 6419
074 U020400 0
074 V010400 11.67
074 V020400 0.00
074 W000400 0.0000
074 X000400 6039
074 Y000400 0
075 A000400 0
075 B000400 65724
076 000400 0.00
SIGNATURE FRANK STRAUSS
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000060335
<NAME> CGM TRUST
<SERIES>
<NUMBER> 1
<NAME> CGM MUTUAL FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1996
<PERIOD-END> JUN-30-1996
<INVESTMENTS-AT-COST> 988062006
<INVESTMENTS-AT-VALUE> 1145109733
<RECEIVABLES> 8175729
<ASSETS-OTHER> 97028
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1153382490
<PAYABLE-FOR-SECURITIES> 1556860
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2373782
<TOTAL-LIABILITIES> 3930642
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 953356911
<SHARES-COMMON-STOCK> 37126024
<SHARES-COMMON-PRIOR> 39230204
<ACCUMULATED-NII-CURRENT> 6707083
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 32340127
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 157047727
<NET-ASSETS> 1149451848
<DIVIDEND-INCOME> 8729113
<INTEREST-INCOME> 9245744
<OTHER-INCOME> 0
<EXPENSES-NET> 5207190
<NET-INVESTMENT-INCOME> 12767667
<REALIZED-GAINS-CURRENT> 35007920
<APPREC-INCREASE-CURRENT> 17575439
<NET-CHANGE-FROM-OPS> 65351026
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6060584)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1711548
<NUMBER-OF-SHARES-REDEEMED> (3993499)
<SHARES-REINVESTED> 177771
<NET-CHANGE-IN-ASSETS> (4986911)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (2667793)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3937052
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5207190
<AVERAGE-NET-ASSETS> 1164210367
<PER-SHARE-NAV-BEGIN> 29.43
<PER-SHARE-NII> 0.34
<PER-SHARE-GAIN-APPREC> 1.35
<PER-SHARE-DIVIDEND> (0.16)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 30.96
<EXPENSE-RATIO> 0.90
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000060335
<NAME> CGM TRUST
<SERIES>
<NUMBER> 2
<NAME> CGM FIXED INCOME FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1996
<PERIOD-END> JUN-30-1996
<INVESTMENTS-AT-COST> 32386427
<INVESTMENTS-AT-VALUE> 34338458
<RECEIVABLES> 1565132
<ASSETS-OTHER> 14505
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 35918095
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 78839
<TOTAL-LIABILITIES> 78839
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 33145503
<SHARES-COMMON-STOCK> 2973587
<SHARES-COMMON-PRIOR> 2786879
<ACCUMULATED-NII-CURRENT> 224294
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 517428
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1952031
<NET-ASSETS> 35839256
<DIVIDEND-INCOME> 258700
<INTEREST-INCOME> 926342
<OTHER-INCOME> 0
<EXPENSES-NET> 143074
<NET-INVESTMENT-INCOME> 1041968
<REALIZED-GAINS-CURRENT> 2675537
<APPREC-INCREASE-CURRENT> (1095476)
<NET-CHANGE-FROM-OPS> 2622029
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (817674)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 435798
<NUMBER-OF-SHARES-REDEEMED> (305354)
<SHARES-REINVESTED> 56264
<NET-CHANGE-IN-ASSETS> 4046282
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (2158109)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 92577
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 226864
<AVERAGE-NET-ASSETS> 33849380
<PER-SHARE-NAV-BEGIN> 11.41
<PER-SHARE-NII> 0.36
<PER-SHARE-GAIN-APPREC> 0.57
<PER-SHARE-DIVIDEND> (0.29)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.05
<EXPENSE-RATIO> 0.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000060335
<NAME> CGM TRUST
<SERIES>
<NUMBER> 3
<NAME> CGM AMERICAN TAX FREE FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1996
<PERIOD-END> JUN-30-1996
<INVESTMENTS-AT-COST> 11202764
<INVESTMENTS-AT-VALUE> 11341094
<RECEIVABLES> 205426
<ASSETS-OTHER> 4219
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 11550739
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 68055
<TOTAL-LIABILITIES> 68055
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 12425206
<SHARES-COMMON-STOCK> 1232444
<SHARES-COMMON-PRIOR> 1213241
<ACCUMULATED-NII-CURRENT> 58715
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1139567)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 138330
<NET-ASSETS> 11482684
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 351918
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 351918
<REALIZED-GAINS-CURRENT> (252581)
<APPREC-INCREASE-CURRENT> (363477)
<NET-CHANGE-FROM-OPS> (264140)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (294274)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 107592
<NUMBER-OF-SHARES-REDEEMED> (112405)
<SHARES-REINVESTED> 24016
<NET-CHANGE-IN-ASSETS> (372605)
<ACCUMULATED-NII-PRIOR> 1071
<ACCUMULATED-GAINS-PRIOR> (886986)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 34510
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 130112
<AVERAGE-NET-ASSETS> 11566513
<PER-SHARE-NAV-BEGIN> 9.77
<PER-SHARE-NII> 0.29
<PER-SHARE-GAIN-APPREC> (0.50)
<PER-SHARE-DIVIDEND> (0.24)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.32
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000060335
<NAME> CGM TRUST
<SERIES>
<NUMBER> 4
<NAME> CGM REALTY FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1996
<PERIOD-END> JUN-30-1996
<INVESTMENTS-AT-COST> 67490875
<INVESTMENTS-AT-VALUE> 74537288
<RECEIVABLES> 657478
<ASSETS-OTHER> 43658
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 75238424
<PAYABLE-FOR-SECURITIES> 205715
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 126418
<TOTAL-LIABILITIES> 332133
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 65731123
<SHARES-COMMON-STOCK> 6419232
<SHARES-COMMON-PRIOR> 4378566
<ACCUMULATED-NII-CURRENT> 1115258
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1013497
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7046413
<NET-ASSETS> 74906291
<DIVIDEND-INCOME> 2193416
<INTEREST-INCOME> 18655
<OTHER-INCOME> 0
<EXPENSES-NET> 326826
<NET-INVESTMENT-INCOME> 1885245
<REALIZED-GAINS-CURRENT> 2531953
<APPREC-INCREASE-CURRENT> 581340
<NET-CHANGE-FROM-OPS> 4998538
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (769987)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2953296
<NUMBER-OF-SHARES-REDEEMED> (970845)
<SHARES-REINVESTED> 58215
<NET-CHANGE-IN-ASSETS> 27211899
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1518456)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 277802
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 464200
<AVERAGE-NET-ASSETS> 65724333
<PER-SHARE-NAV-BEGIN> 10.89
<PER-SHARE-NII> 0.30
<PER-SHARE-GAIN-APPREC> 0.61
<PER-SHARE-DIVIDEND> (0.13)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.67
<EXPENSE-RATIO> 1.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>