MAINSTAY INSTITUTIONAL FUNDS INC
NSAR-A, 1997-08-29
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<PAGE>      PAGE  1
000 A000000 06/30/97
000 C000000 868307
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 MAINSTAY INSTITUTIONAL FUNDS INC.
001 B000000 811-6175
001 C000000 2125768170
002 A000000 51 MADISON AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10010
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000 11
007 C010100  1
007 C020100 MONEY MARKET FUND
007 C030100 N
007 C010200  2
007 C020200 SHORT-TERM BOND FUND
007 C030200 N
007 C010300  3
007 C020300 BOND FUND
007 C030300 N
007 C010400  4
007 C020400 INDEXED BOND FUND
007 C030400 N
007 C010500  5
007 C020500 MULTI-ASSET FUND
007 C030500 N
007 C010600  6
007 C020600 VALUE EQUITY FUND
007 C030600 N
007 C010700  7
007 C020700 GROWTH EQUITY FUND
007 C030700 N
007 C010800  8
007 C020800 INDEXED EQUITY FUND
007 C030800 N
007 C010900  9
007 C020900 EAFE INDEX FUND
007 C030900 N
007 C011000 10
007 C021000 INTERNATIONAL BOND FUND
<PAGE>      PAGE  2
007 C031000 N
007 C011100 11
007 C021100 INTERNATIONAL EQUITY FUND
007 C031100 N
007 C011200 12
007 C011300 13
007 C011400 14
007 C011500 15
007 C011600 16
007 C011700 17
007 C011800 18
007 C011900 19
007 C012000 20
010 A00AA01 NEW YORK LIFE INSURANCE COMPANY
010 C01AA01 NEW YORK
010 C02AA01 NY
010 C03AA01 10010
011 A00AA01 NYLIFE DISTRIBUTORS INC.
011 B00AA01 8-46655
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10010
012 A00AA01 BOSTON FINANCIAL DATA SERVICES
012 B00AA01 84-0896
012 C01AA01 NORTH QUINCY
012 C02AA01 MA
012 C03AA01 02171
013 A00AA01 PRICE WATERHOUSE
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10022
014 A00AA01 NYLIFE SECURITIES INC.
014 B00AA01 8-15517
014 A00AA02 NYLIFE DISTRIBUTORS INC.
014 B00AA02 8-46655
015 A00AA01 BANK OF NEW YORK
015 B00AA01 C
015 C01AA01 NEW YORK
015 C02AA01 NY
015 C03AA01 10286
015 E01AA01 X
018  00AA00 Y
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019 B00AA00   11
019 C00AA00 THECOMPANY
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020 A000003 GOLDMAN SACHS
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<PAGE>      PAGE  3
020 A000004 AUTRANET
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020 A000005 DONALDSON LUFKIN & JENRE
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<PAGE>      PAGE  4
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<PAGE>      PAGE  5
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080 A00AA00 THE AETNA CASUALTY AND SURETY COMPANY
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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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008 A000201 MACKAY-SHIELDS FINANCIAL CORPORATION
008 B000201 A
008 C000201 801-5594
<PAGE>      PAGE  10
008 D010201 NEW YORK
008 D020201 NY
008 D030201 10019
024  000200 N
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<PAGE>      PAGE  11
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<PAGE>      PAGE  12
067  000200 N
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070 A010200 Y
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<PAGE>      PAGE  13
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<PAGE>      PAGE  14
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008 A000301 MACKAY-SHIELDS FINANCIAL CORPORATION
008 B000301 A
008 C000301 801-5594
008 D010301 NEW YORK
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024  000300 Y
025 A000301 LEHMAN BROTHERS
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025 A000302 SALOMON INC.
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<PAGE>      PAGE  15
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<PAGE>      PAGE  16
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070 J020300 N
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<PAGE>      PAGE  17
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<PAGE>      PAGE  18
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008 A000401 MONITOR CAPITAL ADVISORS, INC.
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025 A000401 DONALDSON LUFKIN & JENRE
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<PAGE>      PAGE  19
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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  26
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<PAGE>      PAGE  27
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<PAGE>      PAGE  29
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<PAGE>      PAGE  30
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<PAGE>      PAGE  34
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<PAGE>      PAGE  35
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<PAGE>      PAGE  38
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066 D000800 N
066 E000800 N
066 F000800 N
066 G000800 N
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068 A000800 N
068 B000800 N
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070 A010800 Y
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070 B020800 N
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070 C020800 N
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070 D020800 N
070 E010800 N
070 E020800 N
070 F010800 Y
070 F020800 Y
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070 H010800 Y
070 H020800 N
070 I010800 N
070 I020800 N
070 J010800 N
070 J020800 N
070 K010800 Y
070 K020800 N
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070 L020800 Y
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070 M020800 N
<PAGE>      PAGE  39
070 N010800 Y
070 N020800 N
070 O010800 Y
070 O020800 N
070 P010800 N
070 P020800 N
070 Q010800 N
070 Q020800 N
070 R010800 N
070 R020800 N
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<PAGE>      PAGE  40
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008 A000901 MONITOR CAPITAL ADVISORS, INC.
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<PAGE>      PAGE  41
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<PAGE>      PAGE  42
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050  000900 N
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052  000900 N
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066 B000900 N
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066 D000900 Y
066 E000900 N
066 F000900 N
066 G000900 N
067  000900 N
068 A000900 N
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070 B020900 N
070 C010900 Y
070 C020900 N
070 D010900 Y
070 D020900 N
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<PAGE>      PAGE  43
070 E020900 N
070 F010900 Y
070 F020900 Y
070 G010900 Y
070 G020900 N
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070 H020900 N
070 I010900 Y
070 I020900 N
070 J010900 N
070 J020900 N
070 K010900 Y
070 K020900 N
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070 L020900 Y
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070 M020900 N
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070 N020900 N
070 O010900 Y
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070 P010900 N
070 P020900 N
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070 Q020900 N
070 R010900 N
070 R020900 N
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<PAGE>      PAGE  44
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008 A001001 MACKAY-SHIELDS FINANCIAL CORPORATION
<PAGE>      PAGE  45
008 B001001 A
008 C001001 801-5594
008 D011001 NEW YORK
008 D021001 NY
008 D031001 10019
024  001000 Y
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025 A001005 BANK OF AMERICA (FORWARD CONTRACT)
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025 A001014 MLPF&S (FORWARD CONTRACT)
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<PAGE>      PAGE  46
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<PAGE>      PAGE  47
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<PAGE>      PAGE  48
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<PAGE>      PAGE  49
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070 D011000 N
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070 E021000 N
070 F011000 N
070 F021000 N
070 G011000 Y
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070 H011000 N
070 H021000 N
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<PAGE>      PAGE  50
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070 K021000 N
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070 L021000 Y
070 M011000 Y
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<PAGE>      PAGE  51
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008 A001101 MACKAY-SHIELDS FINANCIAL CORPORATION
008 B001101 A
008 C001101 801-5594
008 D011101 NEW YORK
008 D021101 NY
008 D031101 10019
024  001100 Y
025 A001101 AXA
025 C001101 E
<PAGE>      PAGE  52
025 D001101     631
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<PAGE>      PAGE  53
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<PAGE>      PAGE  54
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052  001100 N
<PAGE>      PAGE  55
053 A001100 Y
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066 A001100 Y
066 B001100 N
066 C001100 N
066 D001100 Y
066 E001100 N
066 F001100 N
066 G001100 N
067  001100 N
068 A001100 N
068 B001100 Y
069  001100 N
070 A011100 Y
070 A021100 N
070 B011100 Y
070 B021100 N
070 C011100 N
070 C021100 N
070 D011100 Y
070 D021100 N
070 E011100 N
070 E021100 N
070 F011100 Y
070 F021100 N
070 G011100 Y
070 G021100 N
<PAGE>      PAGE  56
070 H011100 Y
070 H021100 N
070 I011100 Y
070 I021100 N
070 J011100 Y
070 J021100 N
070 K011100 Y
070 K021100 N
070 L011100 Y
070 L021100 Y
070 M011100 Y
070 M021100 Y
070 N011100 Y
070 N021100 N
070 O011100 Y
070 O021100 N
070 P011100 Y
070 P021100 N
070 Q011100 N
070 Q021100 N
070 R011100 N
070 R021100 N
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071 D001100   15
072 A001100  6
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072 C001100     1466
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072 G001100      323
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072 J001100       35
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072 P001100        0
072 Q001100        0
072 R001100       18
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<PAGE>      PAGE  57
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072AA001100    15957
072BB001100     5379
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072DD021100        0
072EE001100        0
073 A011100   0.0000
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074 C001100     1500
074 D001100        0
074 E001100       96
074 F001100   125147
074 G001100        0
074 H001100      307
074 I001100      628
074 J001100     6938
074 K001100        0
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074 M001100        6
074 N001100   147096
074 O001100     5838
074 P001100       95
074 Q001100        0
074 R011100        0
074 R021100        0
074 R031100        0
074 R041100       56
074 S001100        0
074 T001100   141107
074 U011100    11777
074 U021100       67
074 V011100    11.91
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074 W001100   0.0000
074 X001100       79
074 Y001100    27986
075 A001100        0
075 B001100   130328
076  001100     0.00
SIGNATURE   JENNIFER B. MCHUGH                           
TITLE       ATTORNEY            
 


<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NUMBER> 011
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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000868307
<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
<SERIES>
   <NUMBER> 031
   <NAME> MAINSTAY INSTITUTIONAL BOND FUND-INSTITUTIONAL CLASS
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000868307
<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
<SERIES>
   <NUMBER> 032
   <NAME> MAINSTAY INSTITUTIONAL BOND FUND-INSTITUTIONAL SERVICE CLASS
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000868307
<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
<SERIES>
   <NUMBER> 041
   <NAME> MAINSTAY INSTITUTIONAL INDEXED BOND FUND-INSTITUTIONAL CLASS
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NUMBER> 052
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
<SERIES>
   <NUMBER> 061
   <NAME> MAINSTAY INSTITUTIONAL VALUE FUND-INSTITUTIONAL CLASS
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
<SERIES>
   <NUMBER> 062
   <NAME> MAINSTAY INSTIT. VALUE FUND-INSTIT. SERVICE CLASS
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000868307
<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
<SERIES>
   <NUMBER> 071
   <NAME> MAINSTAY INSTITUTIONAL GROWTH EQUITY FUND-INSTIT. CLASS
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NUMBER> 072
   <NAME> MAINSTAY INSTIT. GROWTH EQUITY FUND-INSTIT. SERVICE CLASS
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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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<TABLE> <S> <C>

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<TABLE> <S> <C>

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   <NAME> MAINSTAY INSTITUTIONAL EAFE INDEX FUND-INSTITUTIONAL CLASS
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</TABLE>

<TABLE> <S> <C>

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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NUMBER> 101
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NAME> INSTIT. INTERNATIONAL BOND FUND-INSTIT. SERVICE CLASS
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NAME> INSTITUTIONAL INTERNATIONAL EQUITY FUND-INSTITUTIONAL CLASS
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</TABLE>

<TABLE> <S> <C>

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<NAME> MAINSTAY INSTITUTIONAL FUNDS INC.
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   <NAME> INSTITUTIONAL INTERNATIONAL EQUITY FUND-INSTIT. SERVICE CLASS
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