LOOMIS SAYLES INVESTMENT TRUST
NSAR-A, 1996-09-12
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<PAGE>      PAGE  1
000 A000000 06/30/96
000 C000000 000917469
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 LOOMIS SAYLES INVESTMENT TRUST
001 B000000 811-08282
001 C000000 6174822450
002 A000000 ONE FINANCIAL CENTER
002 B000000 BOSTON
002 C000000 MA
002 D010000 02111
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  7
007 C010100  1
007 C020100 LSIT INVESTMENT GRADE FIXED INCOME FUND
007 C030100 N
007 C010200  2
007 C020200 LSIT FIXED INCOME FUND
007 C030200 N
007 C010300  3
007 C020300 LSIT CALIFORNIA TAX FREE INCOME FUND
007 C030300 N
007 C010400  4
007 C020400 LSIT MORTGAGE SECURITIES FUND
007 C030400 N
007 C010500  5
007 C020500 LSIT CORE GROWTH FUND
007 C030500 N
007 C010600  6
007 C020600 LSIT CORE FIXED INCOME FUND
007 C030600 N
007 C010700  7
007 C020700 LSIT HIGH YIELD FIXED INCOME FUND
007 C030700 N
007 C010800  8
007 C010900  9
007 C011000 10
008 A00AA01 LOOMIS, SAYLES & COMPANY, L.P.
008 B00AA01 A
008 C00AA01 801-170
008 D01AA01 BOSTON
008 D02AA01 MA
<PAGE>      PAGE  2
008 D03AA01 02111
010 A00AA01 COOPERS & LYBRAND, L.L.P.
010 C01AA01 BOSTON
010 C02AA01 MA
010 C03AA01 02109
013 A00AA01 COOPERS & LYBRAND. L.L.P.
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02109
015 A00AA01 STATE STREET BANK AND TRUST COMPANY
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02102
015 E01AA01 X
018  00AA00 Y
019 A00AA00 Y
019 B00AA00    9
019 C00AA00 LSITPOOLED
020 A000001 WILLIAM O'NEIL & CO.
020 B000001 95-2269163
020 C000001     12
020 A000002 FIRST BOSTON
020 B000002 13-5659485
020 C000002      3
020 A000003 SALOMON BROTHERS
020 B000003 13-3082694
020 C000003      2
020 A000004 NATWEST SECURITY CORP.
020 B000004 13-3312778
020 C000004      2
020 A000005 DONALDSON, LUFKIN & JENRETTE
020 B000005 13-2741729
020 C000005      2
020 A000006 PRUDENTIAL SECURITIES
020 B000006 22-2347336
020 C000006      1
020 A000007 LEHMAN BROTHERS, INC
020 B000007 13-2518466
020 C000007      1
020 C000008      0
020 C000009      0
020 C000010      0
021  000000       24
022 A000001 STATE STREET BANK & TRUST
022 B000001 04-1867445
022 C000001    585570
022 D000001         0
022 A000002 MORGAN STANLEY & COMPANY
022 B000002 13-2655998
022 C000002     17613
<PAGE>      PAGE  3
022 D000002     12983
022 A000003 LEHMAN BROTHERS, INC.
022 B000003 13-2518468
022 C000003      8618
022 D000003      7722
022 A000004 PAINE WEBBER
022 B000004 13-2638166
022 C000004     15330
022 D000004      1009
022 A000005 MERRILL LYNCH PIERCE FENNER SMITH & CO.
022 B000005 13-5674085
022 C000005      9016
022 D000005      6768
022 A000006 DONALDSON LUFKIN & JENRETTE
022 B000006 13-2741729
022 C000006      8106
022 D000006      7343
022 A000007 GOLMAN SACHS & CO.
022 B000007 13-5108880
022 C000007      8586
022 D000007      4300
022 A000008 SCOTIA MCCLEOD
022 B000008 13-5239583
022 C000008     10498
022 D000008      1178
022 A000009 MORGAN J.P., SECURITIES INC.
022 B000009 13-3224016
022 C000009      6784
022 D000009      3773
022 A000010 WILLIAM O'NEIL & CO.
022 B000010 95-2269163
022 C000010     10443
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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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<PAGE>      PAGE  10
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<PAGE>      PAGE  11
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<PAGE>      PAGE  12
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<PAGE>      PAGE  13
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<PAGE>      PAGE  14
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<PAGE>      PAGE  15
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<PAGE>      PAGE  16
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<PAGE>      PAGE  17
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<PAGE>      PAGE  18
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<PAGE>      PAGE  19
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070 C020400 N
070 D010400 N
070 D020400 N
070 E010400 N
070 E020400 N
070 F010400 N
070 F020400 N
070 G010400 N
070 G020400 N
070 H010400 N
070 H020400 N
070 I010400 N
070 I020400 N
070 J010400 Y
070 J020400 N
070 K010400 Y
070 K020400 N
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070 L020400 N
070 M010400 N
070 M020400 N
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070 N020400 N
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<PAGE>      PAGE  20
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<PAGE>      PAGE  21
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<PAGE>      PAGE  22
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<PAGE>      PAGE  23
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070 I020500 N
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<PAGE>      PAGE  24
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<PAGE>      PAGE  25
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<PAGE>      PAGE  26
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<PAGE>      PAGE  27
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<PAGE>      PAGE  28
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<PAGE>      PAGE  29
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<PAGE>      PAGE  31
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<PAGE>      PAGE  32
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SIGNATURE   NICK PALMERINO                               
TITLE       ASSITANT TREASURER  
 


<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 01
   <NAME> LSIT INVESTMENT GRADE FIXED INCOME FUND
       
<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 02
   <NAME> LSIT FIXED INCOME FUND
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 03
   <NAME> LSIT CALIFORNIA TAX FREE INCOME FUND
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                         10001894
<INVESTMENTS-AT-VALUE>                         9996292
<RECEIVABLES>                                   163577
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                10159869
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        23542
<TOTAL-LIABILITIES>                              23542
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      10133603
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                           97
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           8229
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        (5602)
<NET-ASSETS>                                  10136327
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               236293
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   29663
<NET-INVESTMENT-INCOME>                         206630
<REALIZED-GAINS-CURRENT>                          6054
<APPREC-INCREASE-CURRENT>                     (186120)
<NET-CHANGE-FROM-OPS>                            26564
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       206955
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        2471090
<NUMBER-OF-SHARES-REDEEMED>                      80000
<SHARES-REINVESTED>                              45805
<NET-CHANGE-IN-ASSETS>                         2256504
<ACCUMULATED-NII-PRIOR>                         178634
<ACCUMULATED-GAINS-PRIOR>                         2175
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            22950
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  29663
<AVERAGE-NET-ASSETS>                           9152227
<PER-SHARE-NAV-BEGIN>                           10.230
<PER-SHARE-NII>                                   .260
<PER-SHARE-GAIN-APPREC>                         (.200)
<PER-SHARE-DIVIDEND>                            (.260)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                             10.030
<EXPENSE-RATIO>                                    .65
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                             0.000
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 04
   <NAME> LSIT MORTGAGE SECURITIES FUND
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                         52664353
<INVESTMENTS-AT-VALUE>                        51782650
<RECEIVABLES>                                   348797
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                52131447
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          417
<TOTAL-LIABILITIES>                                417
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      51261886
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                      1792704
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (41857)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                      (881703)
<NET-ASSETS>                                  52131030
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              1790024
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     813
<NET-INVESTMENT-INCOME>                        1789211
<REALIZED-GAINS-CURRENT>                      (121751)
<APPREC-INCREASE-CURRENT>                    (1931146)
<NET-CHANGE-FROM-OPS>                         (263686)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        (263686)
<ACCUMULATED-NII-PRIOR>                        1265369
<ACCUMULATED-GAINS-PRIOR>                        79894
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    817
<AVERAGE-NET-ASSETS>                          51969052
<PER-SHARE-NAV-BEGIN>                           10.290
<PER-SHARE-NII>                                   .350
<PER-SHARE-GAIN-APPREC>                         (.400)
<PER-SHARE-DIVIDEND>                             0.000
<PER-SHARE-DISTRIBUTIONS>                        0.000
<RETURNS-OF-CAPITAL>                             0.000
<PER-SHARE-NAV-END>                              10.24
<EXPENSE-RATIO>                                  0.000
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                             0.000
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 05
   <NAME> LSIT CORE GROWTH FUND
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                         18969299
<INVESTMENTS-AT-VALUE>                        19976488
<RECEIVABLES>                                    22448
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                19998936
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        34911
<TOTAL-LIABILITIES>                              34911
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      19150597
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        98191
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (291951)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       1007188
<NET-ASSETS>                                  19964025
<DIVIDEND-INCOME>                               125465
<INTEREST-INCOME>                                22670
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   52274
<NET-INVESTMENT-INCOME>                          95861
<REALIZED-GAINS-CURRENT>                      (143892)
<APPREC-INCREASE-CURRENT>                       827669
<NET-CHANGE-FROM-OPS>                           779638
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                       11575426
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        12355064
<ACCUMULATED-NII-PRIOR>                          19087
<ACCUMULATED-GAINS-PRIOR>                       148059
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            40211
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  52274
<AVERAGE-NET-ASSETS>                          16128696
<PER-SHARE-NAV-BEGIN>                           10.020
<PER-SHARE-NII>                                   .050
<PER-SHARE-GAIN-APPREC>                           .440
<PER-SHARE-DIVIDEND>                             0.000
<PER-SHARE-DISTRIBUTIONS>                        0.000
<RETURNS-OF-CAPITAL>                             0.000
<PER-SHARE-NAV-END>                             10.510
<EXPENSE-RATIO>                                   .650
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                             0.000
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 06
   <NAME> LSIT CORE FIXED INCOME FUND
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                          4340682
<INVESTMENTS-AT-VALUE>                         4322555
<RECEIVABLES>                                   292686
<ASSETS-OTHER>                                    3941
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 4619182
<PAYABLE-FOR-SECURITIES>                        182902
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        18807
<TOTAL-LIABILITIES>                             201709
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       4392784
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        46224
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         (3408)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       (18127)
<NET-ASSETS>                                   4417473
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                51430
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    5206
<NET-INVESTMENT-INCOME>                          46224
<REALIZED-GAINS-CURRENT>                        (3408)
<APPREC-INCREASE-CURRENT>                      (18127)
<NET-CHANGE-FROM-OPS>                            24689
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        4392784
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                         4417473
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4004
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5206
<AVERAGE-NET-ASSETS>                           4363028
<PER-SHARE-NAV-BEGIN>                           10.000
<PER-SHARE-NII>                                   .110
<PER-SHARE-GAIN-APPREC>                        (0.050)
<PER-SHARE-DIVIDEND>                             0.000
<PER-SHARE-DISTRIBUTIONS>                        0.000
<RETURNS-OF-CAPITAL>                             0.000
<PER-SHARE-NAV-END>                             10.060
<EXPENSE-RATIO>                                  0.650
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                             0.000
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000917469
<NAME> LOOMIS SAYLES INVESTMENT TRUST
<SERIES>
   <NUMBER> 07
   <NAME> LSIT HIGH YIELD FIXED INCOME FUND
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                          2866543
<INVESTMENTS-AT-VALUE>                         2858981
<RECEIVABLES>                                    82108
<ASSETS-OTHER>                                      54
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2941143
<PAYABLE-FOR-SECURITIES>                         39932
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        13438
<TOTAL-LIABILITIES>                              53370
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2879350
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        15985
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        (7562)
<NET-ASSETS>                                   2887773
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                17434
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1449
<NET-INVESTMENT-INCOME>                          15985
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                       (7562)
<NET-CHANGE-FROM-OPS>                             8423
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        2879350
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                         2887773
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1160
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1449
<AVERAGE-NET-ASSETS>                           2713183
<PER-SHARE-NAV-BEGIN>                           10.000
<PER-SHARE-NII>                                   .060
<PER-SHARE-GAIN-APPREC>                        (0.030)
<PER-SHARE-DIVIDEND>                             0.000
<PER-SHARE-DISTRIBUTIONS>                        0.000
<RETURNS-OF-CAPITAL>                             0.000
<PER-SHARE-NAV-END>                             10.030
<EXPENSE-RATIO>                                   0.75
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                             0.000
        

</TABLE>


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