<PAGE> PAGE 1
000 A000000 09/30/99
000 C000000 863520
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
001 A000000 LM INSTITUTIONAL FUND ADVISORS I, INC.
001 B000000 811-06110
001 C000000 4105390000
002 A000000 100 LIGHT STREET
002 B000000 BALTIMORE
002 C000000 MD
002 D010000 21202
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 5
007 C010100 1
007 C020100 LMIFA I WESTERN ASSET CORE PORTFOLIO
007 C030100 N
007 C010200 2
007 C020200 LMIFA I WESTERN ASSET NON US PORTFOLIO
007 C030200 N
007 C010300 3
007 C020300 LMIFA I WESTERN ASSET INTERMEDIATE PORTFOLIO
007 C030300 N
007 C010400 4
007 C020400 LMIFA I WESTERN ASSET LIMITED DURATION PORT.
007 C030400 Y
007 C010500 5
007 C020500 LMIFA I WESTERN ASSET CORE PLUS PORTFOLIO
007 C030500 N
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
007 C011100 11
007 C011200 12
007 C011300 13
007 C011400 14
007 C011500 15
007 C011600 16
007 C011700 17
007 C011800 18
007 C011900 19
<PAGE> PAGE 2
007 C012000 20
007 C012100 21
007 C012200 22
007 C012300 23
007 C012400 24
007 C012500 25
007 C012600 26
007 C012700 27
007 C012800 28
007 C012900 29
007 C013000 30
008 A00AA01 WESTERN ASSET MANAGEMENT COMPANY
008 B00AA01 A
008 C00AA01 801-08162
008 D01AA01 PASADENA
008 D02AA01 CA
008 D03AA01 91105
008 A00AA02 WESTERN ASSET GLOBAL MANAGEMENT LIMITED
008 B00AA02 A
008 C00AA02 801-21068
008 D01AA02 LONDON
008 D05AA02 UNITED KINGDOM
008 D06AA02 EC2M3TY
011 A00AA01 LEGG MASON WOOD WALKER, INCORPORATED
011 B00AA01 8-01-6767
011 C01AA01 BALTIMORE
011 C02AA01 MD
011 C03AA01 21202
012 A00AA01 BOSTON FINANCIAL DATA SERVICES
012 B00AA01 84-00896
012 C01AA01 BOSTON
012 C02AA01 MA
012 C03AA01 02105
013 A00AA01 PRICEWATERHOUSECOOPERS, LLP.
013 B01AA01 BALTIMORE
013 B02AA01 MD
013 B03AA01 21202
014 A00AA01 LEGG MASON WOOD WALKER, INCORPORATED
014 B00AA01 8-01-6767
014 A00AA02 ARROYO SECO, INC.
014 B00AA02 8-48-671
015 A00AA01 STATE STREET BANK AND TRUST COMPANY N.A.
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02105
015 E01AA01 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 17
019 C00AA00 LMINSTITUT
<PAGE> PAGE 3
020 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
020 B000001 13-5674085
020 C000001 279
020 A000002 MORGAN (J.P.) SECURITIES INC.
020 B000002 13-3224016
020 C000002 5
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 284
022 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000001 13-5674085
022 C000001 9981940
022 D000001 268966
022 A000002 LEHMAN GOVERNMENT SECURITIES INC.
022 B000002 13-2518466
022 C000002 6803693
022 D000002 428
022 A000003 MORGAN (J.P.) SECURITIES INC.
022 B000003 13-3224016
022 C000003 1516448
022 D000003 202925
022 A000004 DONALDSON, LUFKIN, & JENRETTE SECURITIES CORP
022 B000004 13-2741729
022 C000004 483002
022 D000004 441838
022 A000005 LEHMAN BROTHERS
022 B000005 13-2518466
022 C000005 478734
022 D000005 92166
022 A000006 FIRST BOSTON CORP.
022 B000006 13-5659485
022 C000006 245757
022 D000006 244983
022 A000007 GOLDMAN SACHS
022 B000007 13-5108880
022 C000007 190385
022 D000007 229591
022 A000008 STATE STREET BANK AND TRUST
022 B000008 04-1867445
022 C000008 288367
022 D000008 0
022 A000009 DEUSTSCHE BANK
022 B000009 13-2730828
022 C000009 95889
022 D000009 98263
<PAGE> PAGE 4
022 A000010 PAINE WEBBER INC.
022 B000010 13-2638166
022 C000010 76300
022 D000010 75461
023 C000000 20741445
023 D000000 2141901
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
029 00AA00 N
030 A00AA00 0
030 B00AA00 0.00
030 C00AA00 0.00
031 A00AA00 0
031 B00AA00 0
032 00AA00 0
033 00AA00 0
034 00AA00 N
035 00AA00 0
036 B00AA00 0
037 00AA00 N
038 00AA00 0
039 00AA00 N
040 00AA00 Y
041 00AA00 Y
049 00AA00 N
050 00AA00 N
051 00AA00 N
052 00AA00 N
053 A00AA00 Y
053 B00AA00 Y
054 A00AA00 Y
054 B00AA00 N
054 C00AA00 Y
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 Y
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
054 M00AA00 Y
<PAGE> PAGE 5
054 N00AA00 N
054 O00AA00 Y
055 A00AA00 N
055 B00AA00 N
056 00AA00 Y
057 00AA00 N
077 A000000 N
078 000000 N
080 A00AA00 ICI MUTUAL INSURANCE CO.
080 C00AA00 20000
081 A00AA00 Y
081 B00AA00 40
082 A00AA00 N
082 B00AA00 0
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 N
085 B00AA00 N
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
024 000100 Y
025 A000101 JP MORGAN & COMPANY, INC.
025 B000101 13-3224016
025 C000101 D
025 D000101 1753
025 A000102 DELETE
025 D000102 0
025 D000103 0
025 D000104 0
025 D000105 0
025 D000106 0
025 D000107 0
025 D000108 0
025 D000109 0
025 D000110 0
025 D000111 0
025 D000112 0
025 D000113 0
025 D000114 0
<PAGE> PAGE 6
025 D000115 0
025 D000116 0
028 A010100 11274
028 A020100 0
028 A030100 0
028 A040100 11127
028 B010100 5927
028 B020100 8913
028 B030100 0
028 B040100 2946
028 C010100 3364
028 C020100 0
028 C030100 0
028 C040100 5471
028 D010100 7730
028 D020100 9498
028 D030100 0
028 D040100 4730
028 E010100 1378
028 E020100 0
028 E030100 0
028 E040100 4472
028 F010100 1892
028 F020100 0
028 F030100 0
028 F040100 14206
028 G010100 31565
028 G020100 18411
028 G030100 0
028 G040100 42952
028 H000100 0
042 A000100 0
042 B000100 0
042 C000100 0
042 D000100 100
042 E000100 0
042 F000100 0
042 G000100 0
042 H000100 0
043 000100 1
044 000100 0
045 000100 Y
046 000100 N
047 000100 Y
048 000100 0.450
048 A010100 0
048 A020100 0.000
048 B010100 0
048 B020100 0.000
048 C010100 0
048 C020100 0.000
<PAGE> PAGE 7
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 0
048 K020100 0.000
058 A000100 N
059 000100 Y
060 A000100 Y
060 B000100 Y
061 000100 1000000
062 A000100 Y
062 B000100 0.1
062 C000100 0.6
062 D000100 5.6
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 4.7
062 M000100 25.1
062 N000100 49.1
062 O000100 0.0
062 P000100 17.6
062 Q000100 10.8
062 R000100 0.6
063 A000100 0
063 B000100 10.0
064 A000100 N
064 B000100 N
066 A000100 N
067 000100 N
068 A000100 N
068 B000100 N
069 000100 N
070 A010100 Y
070 A020100 Y
070 B010100 N
<PAGE> PAGE 8
070 B020100 N
070 C010100 Y
070 C020100 Y
070 D010100 N
070 D020100 N
070 E010100 Y
070 E020100 Y
070 F010100 N
070 F020100 N
070 G010100 Y
070 G020100 Y
070 H010100 N
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 Y
070 K010100 Y
070 K020100 Y
070 L010100 Y
070 L020100 Y
070 M010100 Y
070 M020100 N
070 N010100 Y
070 N020100 Y
070 O010100 Y
070 O020100 N
070 P010100 Y
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
071 A000100 1067006
071 B000100 1003907
071 C000100 691106
071 D000100 291
072 A000100 6
072 B000100 22073
072 C000100 312
072 D000100 0
072 E000100 0
072 F000100 1537
072 G000100 0
072 H000100 0
072 I000100 17
072 J000100 110
072 K000100 0
072 L000100 17
072 M000100 9
072 N000100 36
<PAGE> PAGE 9
072 O000100 0
072 P000100 0
072 Q000100 0
072 R000100 10
072 S000100 5
072 T000100 1
072 U000100 0
072 V000100 0
072 W000100 7
072 X000100 1749
072 Y000100 40
072 Z000100 20676
072AA000100 0
072BB000100 7184
072CC010100 0
072CC020100 15494
072DD010100 17596
072DD020100 0
072EE000100 1930
073 A010100 0.2800
073 A020100 0.0000
073 B000100 0.0300
073 C000100 0.0000
074 A000100 41
074 B000100 37382
074 C000100 36186
074 D000100 689134
074 E000100 3781
074 F000100 0
074 G000100 0
074 H000100 52
074 I000100 0
074 J000100 2297
074 K000100 0
074 L000100 7780
074 M000100 3
074 N000100 776656
074 O000100 103890
074 P000100 210
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 640
074 R040100 931
074 S000100 0
074 T000100 670985
074 U010100 62785
074 U020100 126
074 V010100 10.67
074 V020100 10.66
074 W000100 0.0000
<PAGE> PAGE 10
074 X000100 84
074 Y000100 0
075 A000100 0
075 B000100 683053
076 000100 0.00
024 000200 N
025 A000201 DELETE
025 D000201 0
025 D000202 0
025 D000203 0
025 D000204 0
025 D000205 0
025 D000206 0
025 D000207 0
025 D000208 0
025 D000209 0
025 D000210 0
025 D000211 0
025 D000212 0
025 D000213 0
025 D000214 0
025 D000215 0
025 D000216 0
028 A010200 0
028 A020200 0
028 A030200 0
028 A040200 0
028 B010200 0
028 B020200 2690
028 B030200 0
028 B040200 0
028 C010200 0
028 C020200 0
028 C030200 0
028 C040200 0
028 D010200 0
028 D020200 668
028 D030200 0
028 D040200 0
028 E010200 0
028 E020200 0
028 E030200 0
028 E040200 0
028 F010200 7880
028 F020200 0
028 F030200 0
028 F040200 0
028 G010200 7880
028 G020200 3358
028 G030200 0
028 G040200 0
<PAGE> PAGE 11
028 H000200 0
042 A000200 0
042 B000200 0
042 C000200 0
042 D000200 0
042 E000200 0
042 F000200 0
042 G000200 0
042 H000200 0
043 000200 0
044 000200 0
045 000200 Y
046 000200 N
047 000200 Y
048 000200 0.450
048 A010200 0
048 A020200 0.000
048 B010200 0
048 B020200 0.000
048 C010200 0
048 C020200 0.000
048 D010200 0
048 D020200 0.000
048 E010200 0
048 E020200 0.000
048 F010200 0
048 F020200 0.000
048 G010200 0
048 G020200 0.000
048 H010200 0
048 H020200 0.000
048 I010200 0
048 I020200 0.000
048 J010200 0
048 J020200 0.000
048 K010200 0
048 K020200 0.000
058 A000200 N
059 000200 Y
060 A000200 N
060 B000200 N
061 000200 1000000
062 A000200 Y
062 B000200 0.0
062 C000200 0.0
062 D000200 1.9
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 0.0
<PAGE> PAGE 12
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 0.0
062 Q000200 89.3
062 R000200 0.0
063 A000200 0
063 B000200 13.4
064 A000200 N
064 B000200 N
066 A000200 N
067 000200 N
068 A000200 N
068 B000200 Y
069 000200 N
070 A010200 Y
070 A020200 Y
070 B010200 N
070 B020200 N
070 C010200 Y
070 C020200 N
070 D010200 N
070 D020200 N
070 E010200 Y
070 E020200 Y
070 F010200 N
070 F020200 N
070 G010200 Y
070 G020200 N
070 H010200 N
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 Y
070 J020200 Y
070 K010200 N
070 K020200 N
070 L010200 Y
070 L020200 Y
070 M010200 Y
070 M020200 Y
070 N010200 Y
070 N020200 N
070 O010200 Y
070 O020200 N
070 P010200 Y
070 P020200 N
070 Q010200 N
<PAGE> PAGE 13
070 Q020200 N
070 R010200 N
070 R020200 N
071 A000200 174056
071 B000200 161457
071 C000200 139599
071 D000200 231
072 A000200 6
072 B000200 1798
072 C000200 0
072 D000200 0
072 E000200 0
072 F000200 148
072 G000200 0
072 H000200 0
072 I000200 7
072 J000200 71
072 K000200 0
072 L000200 1
072 M000200 8
072 N000200 13
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 15
072 S000200 3
072 T000200 0
072 U000200 0
072 V000200 0
072 W000200 0
072 X000200 266
072 Y000200 86
072 Z000200 1618
072AA000200 0
072BB000200 813
072CC010200 0
072CC020200 2446
072DD010200 2461
072DD020200 0
072EE000200 897
073 A010200 0.3800
073 A020200 0.0000
073 B000200 0.1400
073 C000200 0.0000
074 A000200 3857
074 B000200 1333
074 C000200 0
074 D000200 63982
074 E000200 0
074 F000200 0
074 G000200 0
<PAGE> PAGE 14
074 H000200 0
074 I000200 0
074 J000200 1177
074 K000200 0
074 L000200 3036
074 M000200 1
074 N000200 73386
074 O000200 0
074 P000200 10
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 1779
074 S000200 0
074 T000200 71597
074 U010200 7580
074 U020200 0
074 V010200 9.45
074 V020200 0.00
074 W000200 0.0000
074 X000200 4
074 Y000200 0
075 A000200 0
075 B000200 65740
076 000200 0.00
024 000300 Y
025 A000301 LEHMAN BROTHERS HOLDINGS INCORPORATED
025 B000301 13-2518466
025 C000301 D
025 D000301 3107
025 A000302 JP MORGAN & COMPANY, INC.
025 B000302 13-3224016
025 C000302 D
025 D000302 622
025 A000303 SOLOMON SMITH BARNEY
025 B000303 13-1912900
025 C000303 D
025 D000303 1265
025 A000304 NATIONSBANK CAPITAL TRUST III
025 B000304 75-0520130
025 C000304 D
025 D000304 1241
025 D000305 0
025 D000306 0
025 D000307 0
025 D000308 0
028 A010300 10339
028 A020300 0
028 A030300 0
028 A040300 2061
<PAGE> PAGE 15
028 B010300 919
028 B020300 4511
028 B030300 0
028 B040300 59023
028 C010300 41433
028 C020300 0
028 C030300 0
028 C040300 3218
028 D010300 1657
028 D020300 4596
028 D030300 0
028 D040300 4736
028 E010300 1177
028 E020300 0
028 E030300 0
028 E040300 1446
028 F010300 15225
028 F020300 0
028 F030300 0
028 F040300 5564
028 G010300 70750
028 G020300 9107
028 G030300 0
028 G040300 76048
028 H000300 0
042 A000300 0
042 B000300 0
042 C000300 0
042 D000300 100
042 E000300 0
042 F000300 0
042 G000300 0
042 H000300 0
043 000300 5
044 000300 0
045 000300 Y
046 000300 N
047 000300 Y
048 000300 0.400
048 A010300 0
048 A020300 0.000
048 B010300 0
048 B020300 0.000
048 C010300 0
048 C020300 0.000
048 D010300 0
048 D020300 0.000
048 E010300 0
048 E020300 0.000
048 F010300 0
048 F020300 0.000
<PAGE> PAGE 16
048 G010300 0
048 G020300 0.000
048 H010300 0
048 H020300 0.000
048 I010300 0
048 I020300 0.000
048 J010300 0
048 J020300 0.000
048 K010300 0
048 K020300 0.000
058 A000300 N
059 000300 Y
060 A000300 Y
060 B000300 Y
061 000300 1000000
062 A000300 Y
062 B000300 0.0
062 C000300 0.8
062 D000300 13.4
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 0.0
062 J000300 0.0
062 K000300 0.0
062 L000300 2.5
062 M000300 24.7
062 N000300 23.9
062 O000300 0.0
062 P000300 26.8
062 Q000300 18.7
062 R000300 0.0
063 A000300 0
063 B000300 6.2
064 A000300 N
064 B000300 N
066 A000300 N
067 000300 N
068 A000300 N
068 B000300 N
069 000300 N
070 A010300 Y
070 A020300 Y
070 B010300 N
070 B020300 N
070 C010300 Y
070 C020300 Y
070 D010300 N
070 D020300 N
070 E010300 Y
<PAGE> PAGE 17
070 E020300 Y
070 F010300 N
070 F020300 N
070 G010300 Y
070 G020300 Y
070 H010300 N
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
070 J020300 Y
070 K010300 Y
070 K020300 Y
070 L010300 Y
070 L020300 Y
070 M010300 Y
070 M020300 N
070 N010300 Y
070 N020300 Y
070 O010300 Y
070 O020300 N
070 P010300 Y
070 P020300 N
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000300 729182
071 B000300 742238
071 C000300 302659
071 D000300 482
072 A000300 6
072 B000300 9982
072 C000300 6
072 D000300 0
072 E000300 0
072 F000300 607
072 G000300 0
072 H000300 0
072 I000300 11
072 J000300 69
072 K000300 0
072 L000300 3
072 M000300 9
072 N000300 27
072 O000300 0
072 P000300 0
072 Q000300 0
072 R000300 7
072 S000300 5
072 T000300 5
<PAGE> PAGE 18
072 U000300 0
072 V000300 0
072 W000300 0
072 X000300 743
072 Y000300 54
072 Z000300 9299
072AA000300 0
072BB000300 4899
072CC010300 0
072CC020300 2027
072DD010300 9086
072DD020300 104
072EE000300 0
073 A010300 0.3100
073 A020300 0.2900
073 B000300 0.0000
073 C000300 0.0000
074 A000300 1
074 B000300 42235
074 C000300 10447
074 D000300 296591
074 E000300 0
074 F000300 0
074 G000300 0
074 H000300 0
074 I000300 0
074 J000300 14935
074 K000300 0
074 L000300 9552
074 M000300 0
074 N000300 373761
074 O000300 58033
074 P000300 107
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 107
074 R040300 196
074 S000300 0
074 T000300 315318
074 U010300 30013
074 U020300 356
074 V010300 10.38
074 V020300 10.38
074 W000300 0.0000
074 X000300 36
074 Y000300 0
075 A000300 0
075 B000300 303445
076 000300 0.00
024 000400 N
<PAGE> PAGE 19
025 A000401 DELETE
025 D000401 0
025 D000402 0
025 D000403 0
025 D000404 0
025 D000405 0
025 D000406 0
025 D000407 0
025 D000408 0
028 A010400 0
028 A020400 0
028 A030400 0
028 A040400 3500
028 B010400 0
028 B020400 398
028 B030400 0
028 B040400 3350
028 C010400 0
028 C020400 0
028 C030400 0
028 C040400 3000
028 D010400 0
028 D020400 417
028 D030400 0
028 D040400 4000
028 E010400 0
028 E020400 0
028 E030400 0
028 E040400 2000
028 F010400 0
028 F020400 0
028 F030400 0
028 F040400 8043
028 G010400 0
028 G020400 815
028 G030400 0
028 G040400 23893
028 H000400 0
042 A000400 0
042 B000400 0
042 C000400 0
042 D000400 0
042 E000400 0
042 F000400 0
042 G000400 0
042 H000400 0
043 000400 0
044 000400 0
045 000400 Y
046 000400 N
047 000400 Y
<PAGE> PAGE 20
048 000400 0.350
048 A010400 0
048 A020400 0.000
048 B010400 0
048 B020400 0.000
048 C010400 0
048 C020400 0.000
048 D010400 0
048 D020400 0.000
048 E010400 0
048 E020400 0.000
048 F010400 0
048 F020400 0.000
048 G010400 0
048 G020400 0.000
048 H010400 0
048 H020400 0.000
048 I010400 0
048 I020400 0.000
048 J010400 0
048 J020400 0.000
048 K010400 0
048 K020400 0.000
058 A000400 N
059 000400 Y
060 A000400 Y
060 B000400 Y
061 000400 1000000
062 A000400 Y
062 B000400 0.0
062 C000400 174.7
062 D000400 134.2
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 1.9
062 M000400 41.7
062 N000400 0.0
062 O000400 0.0
062 P000400 0.0
062 Q000400 0.0
062 R000400 0.0
063 A000400 0
063 B000400 0.2
064 A000400 N
064 B000400 N
066 A000400 N
<PAGE> PAGE 21
067 000400 N
068 A000400 N
068 B000400 N
069 000400 N
070 A010400 Y
070 A020400 Y
070 B010400 N
070 B020400 N
070 C010400 Y
070 C020400 Y
070 D010400 N
070 D020400 N
070 E010400 Y
070 E020400 Y
070 F010400 N
070 F020400 N
070 G010400 Y
070 G020400 Y
070 H010400 N
070 H020400 N
070 I010400 N
070 I020400 N
070 J010400 Y
070 J020400 Y
070 K010400 Y
070 K020400 Y
070 L010400 Y
070 L020400 Y
070 M010400 Y
070 M020400 N
070 N010400 Y
070 N020400 N
070 O010400 Y
070 O020400 N
070 P010400 Y
070 P020400 N
070 Q010400 N
070 Q020400 N
070 R010400 N
070 R020400 N
071 A000400 21408
071 B000400 45103
071 C000400 14226
071 D000400 300
072 A000400 6
072 B000400 516
072 C000400 1
072 D000400 0
072 E000400 0
072 F000400 28
072 G000400 0
<PAGE> PAGE 22
072 H000400 0
072 I000400 7
072 J000400 29
072 K000400 0
072 L000400 0
072 M000400 20
072 N000400 20
072 O000400 0
072 P000400 0
072 Q000400 0
072 R000400 15
072 S000400 3
072 T000400 0
072 U000400 0
072 V000400 0
072 W000400 0
072 X000400 122
072 Y000400 90
072 Z000400 485
072AA000400 0
072BB000400 836
072CC010400 547
072CC020400 0
072DD010400 752
072DD020400 0
072EE000400 63
073 A010400 0.5000
073 A020400 0.0000
073 B000400 0.0300
073 C000400 0.0000
074 A000400 1
074 B000400 3227
074 C000400 4200
074 D000400 1001
074 E000400 0
074 F000400 0
074 G000400 0
074 H000400 0
074 I000400 0
074 J000400 0
074 K000400 45
074 L000400 14
074 M000400 29
074 N000400 8517
074 O000400 0
074 P000400 0
074 Q000400 0
074 R010400 0
074 R020400 0
074 R030400 0
074 R040400 6113
<PAGE> PAGE 23
074 S000400 0
074 T000400 2404
074 U010400 252
074 U020400 0
074 V010400 9.55
074 V020400 0.00
074 W000400 0.0000
074 X000400 1
074 Y000400 0
075 A000400 0
075 B000400 15995
076 000400 0.00
024 000500 Y
025 A000501 LEHMAN BROTHERS HOLDINGS INCORPORATED
025 B000501 13-2518466
025 C000501 D
025 D000501 993
025 D000502 0
025 D000503 0
025 D000504 0
025 D000505 0
025 D000506 0
025 D000507 0
025 D000508 0
028 A010500 27005
028 A020500 0
028 A030500 0
028 A040500 70
028 B010500 0
028 B020500 1614
028 B030500 0
028 B040500 41
028 C010500 1699
028 C020500 0
028 C030500 0
028 C040500 275
028 D010500 15394
028 D020500 2093
028 D030500 0
028 D040500 80
028 E010500 18180
028 E020500 0
028 E030500 0
028 E040500 586
028 F010500 5420
028 F020500 0
028 F030500 0
028 F040500 5913
028 G010500 67698
028 G020500 3707
028 G030500 0
<PAGE> PAGE 24
028 G040500 6965
028 H000500 0
042 A000500 0
042 B000500 0
042 C000500 0
042 D000500 0
042 E000500 0
042 F000500 0
042 G000500 0
042 H000500 0
043 000500 0
044 000500 0
045 000500 Y
046 000500 Y
047 000500 Y
048 000500 0.450
048 A010500 0
048 A020500 0.000
048 B010500 0
048 B020500 0.000
048 C010500 0
048 C020500 0.000
048 D010500 0
048 D020500 0.000
048 E010500 0
048 E020500 0.000
048 F010500 0
048 F020500 0.000
048 G010500 0
048 G020500 0.000
048 H010500 0
048 H020500 0.000
048 I010500 0
048 I020500 0.000
048 J010500 0
048 J020500 0.000
048 K010500 0
048 K020500 0.000
058 A000500 N
059 000500 Y
060 A000500 Y
060 B000500 Y
061 000500 1000000
062 A000500 Y
062 B000500 0.0
062 C000500 0.9
062 D000500 16.0
062 E000500 0.0
062 F000500 0.0
062 G000500 0.0
062 H000500 0.0
<PAGE> PAGE 25
062 I000500 0.0
062 J000500 0.0
062 K000500 0.0
062 L000500 3.0
062 M000500 27.1
062 N000500 34.4
062 O000500 0.0
062 P000500 13.9
062 Q000500 17.0
062 R000500 0.2
063 A000500 0
063 B000500 12.0
064 A000500 N
064 B000500 N
066 A000500 N
067 000500 N
068 A000500 N
068 B000500 N
069 000500 N
070 A010500 Y
070 A020500 Y
070 B010500 N
070 B020500 N
070 C010500 Y
070 C020500 Y
070 D010500 N
070 D020500 N
070 E010500 Y
070 E020500 Y
070 F010500 N
070 F020500 N
070 G010500 Y
070 G020500 Y
070 H010500 N
070 H020500 N
070 I010500 N
070 I020500 N
070 J010500 Y
070 J020500 Y
070 K010500 Y
070 K020500 Y
070 L010500 Y
070 L020500 Y
070 M010500 Y
070 M020500 Y
070 N010500 Y
070 N020500 N
070 O010500 Y
070 O020500 N
070 P010500 Y
070 P020500 N
<PAGE> PAGE 26
070 Q010500 N
070 Q020500 N
070 R010500 N
070 R020500 N
071 A000500 292523
071 B000500 235567
071 C000500 141364
071 D000500 333
072 A000500 6
072 B000500 4915
072 C000500 9
072 D000500 0
072 E000500 0
072 F000500 345
072 G000500 0
072 H000500 0
072 I000500 8
072 J000500 80
072 K000500 1
072 L000500 3
072 M000500 9
072 N000500 39
072 O000500 0
072 P000500 0
072 Q000500 0
072 R000500 7
072 S000500 5
072 T000500 0
072 U000500 0
072 V000500 0
072 W000500 1
072 X000500 498
072 Y000500 115
072 Z000500 4541
072AA000500 0
072BB000500 1363
072CC010500 0
072CC020500 3378
072DD010500 3707
072DD020500 0
072EE000500 0
073 A010500 0.2400
073 A020500 0.0000
073 B000500 0.0000
073 C000500 0.0000
074 A000500 1
074 B000500 28809
074 C000500 6966
074 D000500 166514
074 E000500 413
074 F000500 0
<PAGE> PAGE 27
074 G000500 0
074 H000500 13
074 I000500 0
074 J000500 1360
074 K000500 0
074 L000500 3317
074 M000500 0
074 N000500 207393
074 O000500 26738
074 P000500 44
074 Q000500 0
074 R010500 0
074 R020500 0
074 R030500 236
074 R040500 196
074 S000500 0
074 T000500 180179
074 U010500 18561
074 U020500 0
074 V010500 9.71
074 V020500 0.00
074 W000500 0.0000
074 X000500 16
074 Y000500 0
075 A000500 0
075 B000500 153149
076 000500 0.00
SIGNATURE MARIE K. KARPINSKI
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 11
<NAME> WESTERN ASSET CORE PORTFOLIO-INSTITUTIONAL SHARES
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 785424
<INVESTMENTS-AT-VALUE> 766535
<RECEIVABLES> 10077
<ASSETS-OTHER> 41
<OTHER-ITEMS-ASSETS> 3
<TOTAL-ASSETS> 776656
<PAYABLE-FOR-SECURITIES> 103890
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1781
<TOTAL-LIABILITIES> 105671
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 695969
<SHARES-COMMON-STOCK> 62785
<SHARES-COMMON-PRIOR> 62268
<ACCUMULATED-NII-CURRENT> 10436
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (16582)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (18838)
<NET-ASSETS> 670985
<DIVIDEND-INCOME> 312
<INTEREST-INCOME> 22073
<OTHER-INCOME> 0
<EXPENSES-NET> 1709
<NET-INVESTMENT-INCOME> 20676
<REALIZED-GAINS-CURRENT> (7184)
<APPREC-INCREASE-CURRENT> (15494)
<NET-CHANGE-FROM-OPS> (2002)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (17596)
<DISTRIBUTIONS-OF-GAINS> (1930)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2790
<NUMBER-OF-SHARES-REDEEMED> (3980)
<SHARES-REINVESTED> 1707
<NET-CHANGE-IN-ASSETS> (14504)
<ACCUMULATED-NII-PRIOR> 7356
<ACCUMULATED-GAINS-PRIOR> (7468)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1537
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1749
<AVERAGE-NET-ASSETS> 682544
<PER-SHARE-NAV-BEGIN> 11.01
<PER-SHARE-NII> .33
<PER-SHARE-GAIN-APPREC> (.36)
<PER-SHARE-DIVIDEND> (.28)
<PER-SHARE-DISTRIBUTIONS> (.03)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.67
<EXPENSE-RATIO> .50
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUNS ADVISORS I, INC.
<SERIES>
<NUMBER> 12
<NAME> WESTERN ASSET CORE PORTFOLIO-FINACIAL INTERMEDIARY SHARES
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 785424
<INVESTMENTS-AT-VALUE> 766535
<RECEIVABLES> 10077
<ASSETS-OTHER> 41
<OTHER-ITEMS-ASSETS> 3
<TOTAL-ASSETS> 776656
<PAYABLE-FOR-SECURITIES> 103890
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1781
<TOTAL-LIABILITIES> 105670
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 695969
<SHARES-COMMON-STOCK> 126
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 10436
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (16582)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (18838)
<NET-ASSETS> 670985
<DIVIDEND-INCOME> 312
<INTEREST-INCOME> 22073
<OTHER-INCOME> 0
<EXPENSES-NET> 1709
<NET-INVESTMENT-INCOME> 20676
<REALIZED-GAINS-CURRENT> (7184)
<APPREC-INCREASE-CURRENT> (15494)
<NET-CHANGE-FROM-OPS> (2002)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 126
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (14504)
<ACCUMULATED-NII-PRIOR> 7356
<ACCUMULATED-GAINS-PRIOR> (7468)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1537
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1749
<AVERAGE-NET-ASSETS> 1331
<PER-SHARE-NAV-BEGIN> 10.69
<PER-SHARE-NII> .11
<PER-SHARE-GAIN-APPREC> (.14)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.66
<EXPENSE-RATIO> .75
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 5
<NAME> WESTERN ASSET CORE PLUS PORTFOLIO
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 206588
<INVESTMENTS-AT-VALUE> 202715
<RECEIVABLES> 4677
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 207393
<PAYABLE-FOR-SECURITIES> 26738
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 476
<TOTAL-LIABILITIES> 27214
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 184844
<SHARES-COMMON-STOCK> 18561
<SHARES-COMMON-PRIOR> 11998
<ACCUMULATED-NII-CURRENT> 2347
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3021)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (3991)
<NET-ASSETS> 180179
<DIVIDEND-INCOME> 9
<INTEREST-INCOME> 4915
<OTHER-INCOME> 0
<EXPENSES-NET> 383
<NET-INVESTMENT-INCOME> 4541
<REALIZED-GAINS-CURRENT> (1363)
<APPREC-INCREASE-CURRENT> (3378)
<NET-CHANGE-FROM-OPS> (200)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3707)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6903
<NUMBER-OF-SHARES-REDEEMED> (719)
<SHARES-REINVESTED> 379
<NET-CHANGE-IN-ASSETS> 60533
<ACCUMULATED-NII-PRIOR> 1513
<ACCUMULATED-GAINS-PRIOR> (1658)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 345
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 498
<AVERAGE-NET-ASSETS> 153149
<PER-SHARE-NAV-BEGIN> 9.97
<PER-SHARE-NII> .24
<PER-SHARE-GAIN-APPREC> (.26)
<PER-SHARE-DIVIDEND> (.24)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.71
<EXPENSE-RATIO> .50
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 31
<NAME> WESTERN ASSET INTERMEDIATE PORTFOLIO - INSTITUTIONAL SHARES
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 353960
<INVESTMENTS-AT-VALUE> 349273
<RECEIVABLES> 24487
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 373761
<PAYABLE-FOR-SECURITIES> 58033
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 410
<TOTAL-LIABILITIES> 58443
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 321340
<SHARES-COMMON-STOCK> 30013
<SHARES-COMMON-PRIOR> 29622
<ACCUMULATED-NII-CURRENT> 4651
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6033)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (4640)
<NET-ASSETS> 315318
<DIVIDEND-INCOME> 6
<INTEREST-INCOME> 9982
<OTHER-INCOME> 0
<EXPENSES-NET> 689
<NET-INVESTMENT-INCOME> 9299
<REALIZED-GAINS-CURRENT> (4899)
<APPREC-INCREASE-CURRENT> (2027)
<NET-CHANGE-FROM-OPS> 2373
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (9086)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6797
<NUMBER-OF-SHARES-REDEEMED> (7269)
<SHARES-REINVESTED> 863
<NET-CHANGE-IN-ASSETS> (3008)
<ACCUMULATED-NII-PRIOR> 4542
<ACCUMULATED-GAINS-PRIOR> (1134)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 607
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 743
<AVERAGE-NET-ASSETS> 299701
<PER-SHARE-NAV-BEGIN> 10.62
<PER-SHARE-NII> .31
<PER-SHARE-GAIN-APPREC> (.24)
<PER-SHARE-DIVIDEND> (.31)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.38
<EXPENSE-RATIO> .45
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 32
<NAME> WESTERN ASSET INTERMEDIATE PORTFOLIO - FINANCIAL INTERMED
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 353960
<INVESTMENTS-AT-VALUE> 349273
<RECEIVABLES> 24487
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 373761
<PAYABLE-FOR-SECURITIES> 58033
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 410
<TOTAL-LIABILITIES> 58443
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 321340
<SHARES-COMMON-STOCK> 356
<SHARES-COMMON-PRIOR> 357
<ACCUMULATED-NII-CURRENT> 4651
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6033)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (4640)
<NET-ASSETS> 315318
<DIVIDEND-INCOME> 6
<INTEREST-INCOME> 9982
<OTHER-INCOME> 0
<EXPENSES-NET> 689
<NET-INVESTMENT-INCOME> 9299
<REALIZED-GAINS-CURRENT> (4899)
<APPREC-INCREASE-CURRENT> (2027)
<NET-CHANGE-FROM-OPS> 2373
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (9086)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> (11)
<SHARES-REINVESTED> 10
<NET-CHANGE-IN-ASSETS> (3008)
<ACCUMULATED-NII-PRIOR> 4542
<ACCUMULATED-GAINS-PRIOR> (1134)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 607
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 743
<AVERAGE-NET-ASSETS> 3744
<PER-SHARE-NAV-BEGIN> 10.61
<PER-SHARE-NII> .31
<PER-SHARE-GAIN-APPREC> (.25)
<PER-SHARE-DIVIDEND> (.29)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.38
<EXPENSE-RATIO> .70
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 4
<NAME> WESTERN ASSET LIMITED PORTFOLIO
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 8428
<INVESTMENTS-AT-VALUE> 8428
<RECEIVABLES> 59
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 29
<TOTAL-ASSETS> 8517
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 6113
<TOTAL-LIABILITIES> 6113
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3385
<SHARES-COMMON-STOCK> 252
<SHARES-COMMON-PRIOR> 2625
<ACCUMULATED-NII-CURRENT> 113
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1094)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 2404
<DIVIDEND-INCOME> 1
<INTEREST-INCOME> 516
<OTHER-INCOME> 0
<EXPENSES-NET> 32
<NET-INVESTMENT-INCOME> 485
<REALIZED-GAINS-CURRENT> (836)
<APPREC-INCREASE-CURRENT> 547
<NET-CHANGE-FROM-OPS> 196
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (752)
<DISTRIBUTIONS-OF-GAINS> (63)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> (2458)
<SHARES-REINVESTED> 85
<NET-CHANGE-IN-ASSETS> (23697)
<ACCUMULATED-NII-PRIOR> 380
<ACCUMULATED-GAINS-PRIOR> (195)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 28
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 122
<AVERAGE-NET-ASSETS> 15995
<PER-SHARE-NAV-BEGIN> 9.94
<PER-SHARE-NII> .85
<PER-SHARE-GAIN-APPREC> (.71)
<PER-SHARE-DIVIDEND> (.50)
<PER-SHARE-DISTRIBUTIONS> (.03)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.55
<EXPENSE-RATIO> .40
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 2
<NAME> WESTERN ASSET NON-US FIXED INCOME PORTFOLIO
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 66,307
<INVESTMENTS-AT-VALUE> 65,315
<RECEIVABLES> 4,213
<ASSETS-OTHER> 3,857
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 73,386
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,789
<TOTAL-LIABILITIES> 1,789
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 75,550
<SHARES-COMMON-STOCK> 7,580
<SHARES-COMMON-PRIOR> 6,404
<ACCUMULATED-NII-CURRENT> (457)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (870)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (2,626)
<NET-ASSETS> 71,597
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,798
<OTHER-INCOME> 0
<EXPENSES-NET> 180
<NET-INVESTMENT-INCOME> 1,618
<REALIZED-GAINS-CURRENT> (813)
<APPREC-INCREASE-CURRENT> (2,446)
<NET-CHANGE-FROM-OPS> (1,641)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,461)
<DISTRIBUTIONS-OF-GAINS> (897)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 832
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 344
<NET-CHANGE-IN-ASSETS> 6,239
<ACCUMULATED-NII-PRIOR> 386
<ACCUMULATED-GAINS-PRIOR> 840
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 148
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 266
<AVERAGE-NET-ASSETS> 65,740
<PER-SHARE-NAV-BEGIN> 10.21
<PER-SHARE-NII> .26
<PER-SHARE-GAIN-APPREC> (.50)
<PER-SHARE-DIVIDEND> (.38)
<PER-SHARE-DISTRIBUTIONS> (.14)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.45
<EXPENSE-RATIO> .55
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>