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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 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 19
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<PAGE> PAGE 21
067 000400 N
068 A000400 N
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070 F020400 N
070 G010400 N
070 G020400 N
070 H010400 N
070 H020400 N
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070 I020400 N
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070 J020400 Y
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<PAGE> PAGE 22
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<PAGE> PAGE 23
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<PAGE> PAGE 24
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<PAGE> PAGE 25
059 000500 Y
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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 30
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<PAGE> PAGE 31
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<PAGE> PAGE 32
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<PAGE> PAGE 33
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<PAGE> PAGE 34
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<PAGE> PAGE 35
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<PAGE> PAGE 36
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<PAGE> PAGE 37
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<PAGE> PAGE 38
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<PAGE> PAGE 39
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<PAGE> PAGE 40
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<PAGE> PAGE 41
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028 D030900 0
028 D040900 101
028 E010900 18988
028 E020900 138
028 E030900 0
028 E040900 9949
028 F010900 17333
028 F020900 316
028 F030900 0
028 F040900 459
028 G010900 45810
028 G020900 1144
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028 G040900 10954
028 H000900 1419
029 000900 Y
030 A000900 53
030 B000900 4.50
<PAGE> PAGE 42
030 C000900 0.00
031 A000900 0
031 B000900 0
032 000900 0
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034 000900 Y
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036 A000900 N
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042 B000900 0
042 C000900 100
042 D000900 0
042 E000900 0
042 F000900 0
042 G000900 0
042 H000900 0
043 000900 42
044 000900 0
045 000900 Y
046 000900 N
047 000900 Y
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048 B020900 0.000
048 C010900 0
048 C020900 0.000
048 D010900 0
048 D020900 0.000
048 E010900 0
048 E020900 0.000
048 F010900 0
048 F020900 0.000
048 G010900 0
048 G020900 0.000
048 H010900 0
048 H020900 0.000
048 I010900 0
048 I020900 0.000
048 J010900 0
048 J020900 0.000
048 K010900 250000
048 K020900 0.500
049 000900 N
050 000900 N
051 000900 N
052 000900 N
053 A000900 Y
053 B000900 Y
<PAGE> PAGE 43
053 C000900 N
055 A000900 N
055 B000900 N
056 000900 Y
057 000900 N
058 A000900 N
059 000900 Y
060 A000900 Y
060 B000900 Y
061 000900 50
062 A000900 Y
062 B000900 0.0
062 C000900 0.0
062 D000900 4.2
062 E000900 0.0
062 F000900 0.0
062 G000900 0.0
062 H000900 0.0
062 I000900 0.0
062 J000900 0.0
062 K000900 0.0
062 L000900 0.0
062 M000900 2.4
062 N000900 0.0
062 O000900 0.0
062 P000900 82.7
062 Q000900 3.7
062 R000900 7.6
063 A000900 0
063 B000900 9.3
064 A000900 N
064 B000900 N
066 A000900 N
067 000900 N
068 A000900 N
068 B000900 N
069 000900 N
070 A010900 Y
070 A020900 Y
070 B010900 Y
070 B020900 N
070 C010900 Y
070 C020900 N
070 D010900 Y
070 D020900 N
070 E010900 Y
070 E020900 N
070 F010900 Y
070 F020900 N
070 G010900 Y
070 G020900 N
<PAGE> PAGE 44
070 H010900 Y
070 H020900 N
070 I010900 Y
070 I020900 N
070 J010900 Y
070 J020900 Y
070 K010900 N
070 K020900 N
070 L010900 Y
070 L020900 Y
070 M010900 Y
070 M020900 Y
070 N010900 N
070 N020900 N
070 O010900 Y
070 O020900 N
070 P010900 Y
070 P020900 N
070 Q010900 N
070 Q020900 N
070 R010900 N
070 R020900 N
071 A000900 38044
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071 C000900 25568
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072 A000900 6
072 B000900 1315
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<PAGE> PAGE 45
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074 D000900 46522
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074 F000900 3097
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074 N000900 54045
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074 T000900 52348
074 U010900 470
074 U020900 1119
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SIGNATURE JEFFREY L. LUNZER
TITLE TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>011
<NAME>WM BOND & STOCK FUND CL. A
<S> <C>
<PERIOD-TYPE> 6-MOS
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<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 313,079,052
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<NUMBER-OF-SHARES-REDEEMED> (3,548,951)
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<NET-CHANGE-IN-ASSETS> (2,592,398)
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<OVERDIST-NET-GAINS-PRIOR> (534,740)
<GROSS-ADVISORY-FEES> 1,080,015
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<GROSS-EXPENSE> 2,268,633
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<PER-SHARE-NII> 0.20
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<PER-SHARE-DIVIDEND> (0.21)
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<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 15.34
<EXPENSE-RATIO> 1.06
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>012
<NAME>WM BOND & STOCK FUND CL. B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 313,079,052
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<EXPENSES-NET> 2,268,491
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<DISTRIBUTIONS-OF-INCOME> (864,937)
<DISTRIBUTIONS-OF-GAINS> (208,366)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 746,098
<NUMBER-OF-SHARES-REDEEMED> (815,992)
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<NET-CHANGE-IN-ASSETS> (2,592,398)
<ACCUMULATED-NII-PRIOR> 1,396,366
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (534,740)
<GROSS-ADVISORY-FEES> 1,080,015
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,268,633
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<PER-SHARE-NAV-BEGIN> 13.96
<PER-SHARE-NII> 0.14
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<PER-SHARE-DIVIDEND> (0.16)
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<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 15.27
<EXPENSE-RATIO> 1.85
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>013
<NAME>WM BOND & STOCK FUND CL. S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 313,079,052
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<ACCUMULATED-NET-GAINS> 18,285,981
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 53,786,248
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<DISTRIBUTIONS-OF-GAINS> (109)
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<NUMBER-OF-SHARES-SOLD> 953
<NUMBER-OF-SHARES-REDEEMED> (921)
<SHARES-REINVESTED> 26
<NET-CHANGE-IN-ASSETS> (2,592,398)
<ACCUMULATED-NII-PRIOR> 1,396,366
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<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (534,740)
<GROSS-ADVISORY-FEES> 1,080,015
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,268,633
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<PER-SHARE-NAV-BEGIN> 13.79
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<PER-SHARE-DIVIDEND> (0.16)
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<PER-SHARE-NAV-END> 15.12
<EXPENSE-RATIO> 1.85
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>021
<NAME>WM GROWTH & INCOME FUND CL. A
<S> <C>
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<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 967,285,975
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<ACCUM-APPREC-OR-DEPREC> 359,266,959
<NET-ASSETS> 851,453,306
<DIVIDEND-INCOME> 6,645,494
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<EXPENSES-NET> 5,222,629
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<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 15,323,464
<NUMBER-OF-SHARES-REDEEMED> (6,191,836)
<SHARES-REINVESTED> 65,901
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<ACCUMULATED-NII-PRIOR> 626,908
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<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (3,127,881)
<GROSS-ADVISORY-FEES> 2,647,159
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5,318,128
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<PER-SHARE-NAV-BEGIN> 19.99
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<PER-SHARE-GAIN-APPREC> 4.84
<PER-SHARE-DIVIDEND> (0.05)
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<PER-SHARE-NAV-END> 24.82
<EXPENSE-RATIO> 1.00
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>022
<NAME>WM GROWTH & INCOME FUND CL. B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
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<ACCUMULATED-NII-PRIOR> 626,908
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<OVERDIST-NET-GAINS-PRIOR> (3,127,881)
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<EXPENSE-RATIO> 1.76
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>024
<NAME>WM GROWTH & INCOME FUND CL. I
<S> <C>
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<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
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<NET-CHANGE-IN-ASSETS> 515,473,263
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<OVERDIST-NET-GAINS-PRIOR> (3,127,881)
<GROSS-ADVISORY-FEES> 2,647,159
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5,318,128
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<PER-SHARE-NAV-BEGIN> 20.03
<PER-SHARE-NII> 0.08
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<PER-SHARE-DIVIDEND> (0.07)
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<PER-SHARE-NAV-END> 24.86
<EXPENSE-RATIO> 0.68
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>023
<NAME>WM GROWTH & INCOME FUND CL. S
<S> <C>
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<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 967,285,975
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<OVERDISTRIBUTION-GAINS> 0
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<INTEREST-INCOME> 236,516
<OTHER-INCOME> 0
<EXPENSES-NET> 5,222,629
<NET-INVESTMENT-INCOME> 1,659,381
<REALIZED-GAINS-CURRENT> 21,014,312
<APPREC-INCREASE-CURRENT> 226,001,863
<NET-CHANGE-FROM-OPS> 248,675,556
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 30,556
<NUMBER-OF-SHARES-REDEEMED> (174,081)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 515,473,263
<ACCUMULATED-NII-PRIOR> 626,908
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (3,127,881.00)
<GROSS-ADVISORY-FEES> 2,647,159.00
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5,318,128
<AVERAGE-NET-ASSETS> 12,194,459
<PER-SHARE-NAV-BEGIN> 19.79
<PER-SHARE-NII> (0.05)
<PER-SHARE-GAIN-APPREC> 4.78
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 24.52
<EXPENSE-RATIO> 1.83
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 092
<NAME> WM HIGH YIELD FUND CL. B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 52,620,740
<INVESTMENTS-AT-VALUE> 52,686,656
<RECEIVABLES> 1,356,617
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 1,418
<TOTAL-ASSETS> 54,044,691
<PAYABLE-FOR-SECURITIES> 1,560,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136,245
<TOTAL-LIABILITIES> 1,696,245
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10,309,935
<SHARES-COMMON-STOCK> 1,118,920
<SHARES-COMMON-PRIOR> 318,075
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (6,644)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (293,290)
<ACCUM-APPREC-OR-DEPREC> 66,121
<NET-ASSETS> 10,371,376
<DIVIDEND-INCOME> 108,705
<INTEREST-INCOME> 1,315,078
<OTHER-INCOME> 0
<EXPENSES-NET> 93,541
<NET-INVESTMENT-INCOME> 1,330,242
<REALIZED-GAINS-CURRENT> (293,282)
<APPREC-INCREASE-CURRENT> 1,734,274
<NET-CHANGE-FROM-OPS> 2,771,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (276,945)
<DISTRIBUTIONS-OF-GAINS> (24,411)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 847,681
<NUMBER-OF-SHARES-REDEEMED> (62,272)
<SHARES-REINVESTED> 15,436
<NET-CHANGE-IN-ASSETS> 37,324,755
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 114,860
<OVERDISTRIB-NII-PRIOR> (6,925)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 79,790
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 174,729
<AVERAGE-NET-ASSETS> 5,840,199
<PER-SHARE-NAV-BEGIN> 8.90
<PER-SHARE-NII> 0.46
<PER-SHARE-GAIN-APPREC> 0.40
<PER-SHARE-DIVIDEND> (0.44)
<PER-SHARE-DISTRIBUTIONS> (0.05)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.27
<EXPENSE-RATIO> 1.45
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 091
<NAME> WM HIGH YIELD FUND CL. A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 52,620,740
<INVESTMENTS-AT-VALUE> 52,686,656
<RECEIVABLES> 1,356,617
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 1,418
<TOTAL-ASSETS> 54,044,691
<PAYABLE-FOR-SECURITIES> 1,560,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136,245
<TOTAL-LIABILITIES> 1,696,245
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 5,401,517
<SHARES-COMMON-STOCK> 469,664
<SHARES-COMMON-PRIOR> 1,226,300
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (6,644)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (293,290)
<ACCUM-APPREC-OR-DEPREC> 66,121
<NET-ASSETS> 4,323,484
<DIVIDEND-INCOME> 108,705
<INTEREST-INCOME> 1,315,078
<OTHER-INCOME> 0
<EXPENSES-NET> 93,541
<NET-INVESTMENT-INCOME> 1,330,242
<REALIZED-GAINS-CURRENT> (293,282)
<APPREC-INCREASE-CURRENT> 1,734,274
<NET-CHANGE-FROM-OPS> 2,771,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (571,699)
<DISTRIBUTIONS-OF-GAINS> (70,737)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 335,911
<NUMBER-OF-SHARES-REDEEMED> (1,148,206)
<SHARES-REINVESTED> 55,659
<NET-CHANGE-IN-ASSETS> 37,324,755
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 114,860
<OVERDISTRIB-NII-PRIOR> (6,925)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 79,790
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 174,729
<AVERAGE-NET-ASSETS> 10,778,923
<PER-SHARE-NAV-BEGIN> 8.86
<PER-SHARE-NII> 0.45
<PER-SHARE-GAIN-APPREC> 0.43
<PER-SHARE-DIVIDEND> (0.48)
<PER-SHARE-DISTRIBUTIONS> (0.05)
<RETURNS-OF-CAPITAL> 0.0000
<PER-SHARE-NAV-END> 9.21
<EXPENSE-RATIO> 0.65
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 091
<NAME> WM HIGH YIELD FUND CL. I
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 52,620,740
<INVESTMENTS-AT-VALUE> 52,686,656
<RECEIVABLES> 1,356,617
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 1,418
<TOTAL-ASSETS> 54,044,691
<PAYABLE-FOR-SECURITIES> 1,560,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136,245
<TOTAL-LIABILITIES> 1,696,245
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 36,846,906
<SHARES-COMMON-STOCK> 4,090,077
<SHARES-COMMON-PRIOR> 147,859
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (6,644)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (293,290)
<ACCUM-APPREC-OR-DEPREC> 66,121
<NET-ASSETS> 37,630,685
<DIVIDEND-INCOME> 108,705
<INTEREST-INCOME> 1,315,078
<OTHER-INCOME> 0
<EXPENSES-NET> 93,541
<NET-INVESTMENT-INCOME> 1,330,242
<REALIZED-GAINS-CURRENT> (293,282)
<APPREC-INCREASE-CURRENT> 1,734,274
<NET-CHANGE-FROM-OPS> 2,771,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (480,250)
<DISTRIBUTIONS-OF-GAINS> (19,594)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,901,102
<NUMBER-OF-SHARES-REDEEMED> (13,831)
<SHARES-REINVESTED> 54,947
<NET-CHANGE-IN-ASSETS> 37,324,755
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 114,860
<OVERDISTRIB-NII-PRIOR> (6,925)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 79,790
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 174,729
<AVERAGE-NET-ASSETS> 9,103,537
<PER-SHARE-NAV-BEGIN> 8.85
<PER-SHARE-NII> 0.51
<PER-SHARE-GAIN-APPREC> 0.38
<PER-SHARE-DIVIDEND> (0.49)
<PER-SHARE-DISTRIBUTIONS> (0.05)
<RETURNS-OF-CAPITAL> 0.0000
<PER-SHARE-NAV-END> 9.20
<EXPENSE-RATIO> 0.37
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 091
<NAME> WM HIGH YIELD FUND CL. S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 52,620,740
<INVESTMENTS-AT-VALUE> 52,686,656
<RECEIVABLES> 1,356,617
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 1,418
<TOTAL-ASSETS> 54,044,691
<PAYABLE-FOR-SECURITIES> 1,560,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136,245
<TOTAL-LIABILITIES> 1,696,245
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 23,901
<SHARES-COMMON-STOCK> 2,471
<SHARES-COMMON-PRIOR> 2,704
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (6,644)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (293,290)
<ACCUM-APPREC-OR-DEPREC> 66,121
<NET-ASSETS> 22,901
<DIVIDEND-INCOME> 108,705
<INTEREST-INCOME> 1,315,078
<OTHER-INCOME> 0
<EXPENSES-NET> 93,541
<NET-INVESTMENT-INCOME> 1,330,242
<REALIZED-GAINS-CURRENT> (293,282)
<APPREC-INCREASE-CURRENT> 1,734,274
<NET-CHANGE-FROM-OPS> 2,771,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,067)
<DISTRIBUTIONS-OF-GAINS> (126)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> (363)
<SHARES-REINVESTED> 130
<NET-CHANGE-IN-ASSETS> 37,324,755
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 114,860
<OVERDISTRIB-NII-PRIOR> (6,925)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 79,790
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 174,729
<AVERAGE-NET-ASSETS> 21,824
<PER-SHARE-NAV-BEGIN> 8.92
<PER-SHARE-NII> 0.43
<PER-SHARE-GAIN-APPREC> 0.41
<PER-SHARE-DIVIDEND> (0.44)
<PER-SHARE-DISTRIBUTIONS> (0.05)
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 9.27
<EXPENSE-RATIO> 1.64
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>041
<NAME>WM INCOME FUND CL. A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 314,349,711
<INVESTMENTS-AT-VALUE> 325,655,645
<RECEIVABLES> 8,777,051
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 3,124
<TOTAL-ASSETS> 334,435,820
<PAYABLE-FOR-SECURITIES> 5,454
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,311,929
<TOTAL-LIABILITIES> 3,317,383
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 294,713,601
<SHARES-COMMON-STOCK> 29,581,921
<SHARES-COMMON-PRIOR> 22,593,663
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (14,407)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (31,017,793)
<ACCUM-APPREC-OR-DEPREC> 11,305,934
<NET-ASSETS> 276,228,991
<DIVIDEND-INCOME> 55,659
<INTEREST-INCOME> 10,581,229
<OTHER-INCOME> 0
<EXPENSES-NET> 1,633,591
<NET-INVESTMENT-INCOME> 9,003,297
<REALIZED-GAINS-CURRENT> (447,565)
<APPREC-INCREASE-CURRENT> (2,015,181)
<NET-CHANGE-FROM-OPS> 6,540,551
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (7,563,707)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 11,456,287
<NUMBER-OF-SHARES-REDEEMED> (5,016,602)
<SHARES-REINVESTED> 548,573
<NET-CHANGE-IN-ASSETS> 74,434,947
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (16,407)
<OVERDIST-NET-GAINS-PRIOR> (30,570,228)
<GROSS-ADVISORY-FEES> 742,571
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,668,182
<AVERAGE-NET-ASSETS> 230,118,603
<PER-SHARE-NAV-BEGIN> 9.44
<PER-SHARE-NII> 0.31
<PER-SHARE-GAIN-APPREC> (0.10)
<PER-SHARE-DIVIDEND> (0.31)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.34
<EXPENSE-RATIO> 1.09
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>042
<NAME>WM INCOME FUND CL.B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 314,349,711
<INVESTMENTS-AT-VALUE> 325,655,645
<RECEIVABLES> 8,777,051
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 3,124
<TOTAL-ASSETS> 334,435,820
<PAYABLE-FOR-SECURITIES> 5,454
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,311,929
<TOTAL-LIABILITIES> 3,317,383
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 41,438,424
<SHARES-COMMON-STOCK> 4,302,814
<SHARES-COMMON-PRIOR> 3,630,554
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (14,407)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (31,017,793)
<ACCUM-APPREC-OR-DEPREC> 11,305,934
<NET-ASSETS> 40,241,792
<DIVIDEND-INCOME> 55,659
<INTEREST-INCOME> 10,581,229
<OTHER-INCOME> 0
<EXPENSES-NET> 1,633,591
<NET-INVESTMENT-INCOME> 9,003,297
<REALIZED-GAINS-CURRENT> (447,565)
<APPREC-INCREASE-CURRENT> (2,015,181)
<NET-CHANGE-FROM-OPS> 6,540,551
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,054,020)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,132,977
<NUMBER-OF-SHARES-REDEEMED> (536,136)
<SHARES-REINVESTED> 75,419
<NET-CHANGE-IN-ASSETS> 74,434,947
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (16,407)
<OVERDIST-NET-GAINS-PRIOR> (30,570,228)
<GROSS-ADVISORY-FEES> 742,571
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,668,182
<AVERAGE-NET-ASSETS> 36,759,623
<PER-SHARE-NAV-BEGIN> 9.45
<PER-SHARE-NII> 0.27
<PER-SHARE-GAIN-APPREC> (0.10)
<PER-SHARE-DIVIDEND> (0.27)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.35
<EXPENSE-RATIO> 1.82
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>044
<NAME>WM INCOME FUND CL. I
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 314,349,711
<INVESTMENTS-AT-VALUE> 325,655,645
<RECEIVABLES> 8,777,051
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 3,124
<TOTAL-ASSETS> 334,435,820
<PAYABLE-FOR-SECURITIES> 5,454
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,311,929
<TOTAL-LIABILITIES> 3,317,383
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 13,344,516
<SHARES-COMMON-STOCK> 1,422,687
<SHARES-COMMON-PRIOR> 777,604
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (14,407)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (31,017,793)
<ACCUM-APPREC-OR-DEPREC> 11,305,934
<NET-ASSETS> 13,288,855
<DIVIDEND-INCOME> 55,659
<INTEREST-INCOME> 10,581,229
<OTHER-INCOME> 0
<EXPENSES-NET> 1,633,591
<NET-INVESTMENT-INCOME> 9,003,297
<REALIZED-GAINS-CURRENT> (447,565)
<APPREC-INCREASE-CURRENT> (2,015,181)
<NET-CHANGE-FROM-OPS> 6,540,551
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (340,610)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 684,457
<NUMBER-OF-SHARES-REDEEMED> (70,874)
<SHARES-REINVESTED> 31,500
<NET-CHANGE-IN-ASSETS> 74,434,947
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (16,407)
<OVERDIST-NET-GAINS-PRIOR> (30,570,228)
<GROSS-ADVISORY-FEES> 742,571
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,668,182
<AVERAGE-NET-ASSETS> 10,056,361
<PER-SHARE-NAV-BEGIN> 9.44
<PER-SHARE-NII> 0.32
<PER-SHARE-GAIN-APPREC> (0.10)
<PER-SHARE-DIVIDEND> (0.32)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.34
<EXPENSE-RATIO> 0.72
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>043
<NAME>WM INCOME FUND CL.S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 314,349,711
<INVESTMENTS-AT-VALUE> 325,655,645
<RECEIVABLES> 8,777,051
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 3,124
<TOTAL-ASSETS> 334,435,820
<PAYABLE-FOR-SECURITIES> 5,454
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,311,929
<TOTAL-LIABILITIES> 3,317,383
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,348,162
<SHARES-COMMON-STOCK> 145,318
<SHARES-COMMON-PRIOR> 171,794
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (14,407)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (31,017,793)
<ACCUM-APPREC-OR-DEPREC> 11,305,934
<NET-ASSETS> 1,358,799
<DIVIDEND-INCOME> 55,659
<INTEREST-INCOME> 10,581,229
<OTHER-INCOME> 0
<EXPENSES-NET> 1,633,591
<NET-INVESTMENT-INCOME> 9,003,297
<REALIZED-GAINS-CURRENT> (447,565)
<APPREC-INCREASE-CURRENT> (2,015,181)
<NET-CHANGE-FROM-OPS> 6,540,551
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (42,960)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,794
<NUMBER-OF-SHARES-REDEEMED> (33,987)
<SHARES-REINVESTED> 3,717
<NET-CHANGE-IN-ASSETS> 74,434,947
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (16,407)
<OVERDIST-NET-GAINS-PRIOR> (30,570,228)
<GROSS-ADVISORY-FEES> 742,571
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,668,182
<AVERAGE-NET-ASSETS> 1,491,931
<PER-SHARE-NAV-BEGIN> 9.45
<PER-SHARE-NII> 0.27
<PER-SHARE-GAIN-APPREC> (0.10)
<PER-SHARE-DIVIDEND> (0.27)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.35
<EXPENSE-RATIO> 1.98
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 071
<NAME> WM MONEY MARKET FUND CL. A
<S> <C>
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<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 626,441,208
<INVESTMENTS-AT-VALUE> 626,441,208
<RECEIVABLES> 11,274,116
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<SENIOR-LONG-TERM-DEBT> 0
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<TOTAL-LIABILITIES> 15,268,138
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<OVERDISTRIBUTION-GAINS> (73,568)
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 540,043,279
<DIVIDEND-INCOME> 0
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<OTHER-INCOME> 0
<EXPENSES-NET> 1,989,420
<NET-INVESTMENT-INCOME> 12,016,177
<REALIZED-GAINS-CURRENT> 14,290
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 12,030,467
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (10,056,725)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 614,800,101
<NUMBER-OF-SHARES-REDEEMED> (487,892,211)
<SHARES-REINVESTED> 9,679,557
<NET-CHANGE-IN-ASSETS> 100,748,930
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (3,587)
<OVERDIST-NET-GAINS-PRIOR> (87,858)
<GROSS-ADVISORY-FEES> 1,248,734
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,014,481
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<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.022
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> (0.022)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.71
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 072
<NAME> WM MONEY MARKET FUND CL. B
<S> <C>
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<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 626,441,208
<INVESTMENTS-AT-VALUE> 626,441,208
<RECEIVABLES> 11,274,116
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<OTHER-ITEMS-ASSETS> 3,388,586
<TOTAL-ASSETS> 641,103,910
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<SENIOR-LONG-TERM-DEBT> 0
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<TOTAL-LIABILITIES> 15,268,138
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 8,640,525
<SHARES-COMMON-STOCK> 8,640,395
<SHARES-COMMON-PRIOR> 6,619,778
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (3,587)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (73,568)
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 8,639,681
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 14,005,597
<OTHER-INCOME> 0
<EXPENSES-NET> 1,989,420
<NET-INVESTMENT-INCOME> 12,016,177
<REALIZED-GAINS-CURRENT> 14,290
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 12,030,467
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (121,595)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 10,813,781
<NUMBER-OF-SHARES-REDEEMED> (8,902,947)
<SHARES-REINVESTED> 109,783
<NET-CHANGE-IN-ASSETS> 100,748,930
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (3,587)
<OVERDIST-NET-GAINS-PRIOR> (87,858)
<GROSS-ADVISORY-FEES> 1,248,734
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,014,481
<AVERAGE-NET-ASSETS> 7,157,266
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.017
<PER-SHARE-GAIN-APPREC> (0.000)
<PER-SHARE-DIVIDEND> (0.017)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 1.65
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 074
<NAME> WM MONEY MARKET FUND CL. I
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 626,441,208
<INVESTMENTS-AT-VALUE> 626,441,208
<RECEIVABLES> 11,274,116
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<TOTAL-ASSETS> 641,103,910
<PAYABLE-FOR-SECURITIES> 10,000,000
<SENIOR-LONG-TERM-DEBT> 0
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<TOTAL-LIABILITIES> 15,268,138
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 73,206,675
<SHARES-COMMON-STOCK> 73,203,678
<SHARES-COMMON-PRIOR> 108,734,879
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (3,587)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (73,568)
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 73,190,801
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 14,005,597
<OTHER-INCOME> 0
<EXPENSES-NET> 1,989,420
<NET-INVESTMENT-INCOME> 12,016,177
<REALIZED-GAINS-CURRENT> 14,290
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 12,030,467
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,757,439)
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 29,776,459
<NUMBER-OF-SHARES-REDEEMED> (66,787,898)
<SHARES-REINVESTED> 1,480,238
<NET-CHANGE-IN-ASSETS> 100,748,930
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (3,587)
<OVERDIST-NET-GAINS-PRIOR> (87,858)
<GROSS-ADVISORY-FEES> 1,248,734
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,014,481
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<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.022
<PER-SHARE-GAIN-APPREC> (0.000)
<PER-SHARE-DIVIDEND> (0.022)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.59
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 073
<NAME> WM MONEY MARKET FUND CL. S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 626,441,208
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<RECEIVABLES> 11,274,116
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<OTHER-ITEMS-ASSETS> 3,388,586
<TOTAL-ASSETS> 641,103,910
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<PAID-IN-CAPITAL-COMMON> 3,962,976
<SHARES-COMMON-STOCK> 3,962,760
<SHARES-COMMON-PRIOR> 6,304,983
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (3,587)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (73,568)
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 3,962,011
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 14,005,597
<OTHER-INCOME> 0
<EXPENSES-NET> 1,989,420
<NET-INVESTMENT-INCOME> 12,016,177
<REALIZED-GAINS-CURRENT> 14,290
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 12,030,467
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (80,418)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 210,335
<NUMBER-OF-SHARES-REDEEMED> (2,630,261)
<SHARES-REINVESTED> 77,703
<NET-CHANGE-IN-ASSETS> 100,748,930
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (3,587)
<OVERDIST-NET-GAINS-PRIOR> (87,858)
<GROSS-ADVISORY-FEES> 1,248,734
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,014,481
<AVERAGE-NET-ASSETS> 4,641,541
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.017
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<PER-SHARE-DIVIDEND> (0.017)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 1.92
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>031
<NAME>WM NORTHWEST FUND CL. A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 236,294,083
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<PAID-IN-CAPITAL-COMMON> 140,658,373
<SHARES-COMMON-STOCK> 10,902,575
<SHARES-COMMON-PRIOR> 11,934,796
<ACCUMULATED-NII-CURRENT> 0
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<ACCUMULATED-NET-GAINS> 43,970,730
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 131,545,960
<NET-ASSETS> 302,488,517
<DIVIDEND-INCOME> 1,413,319
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<EXPENSES-NET> 2,292,737
<NET-INVESTMENT-INCOME> (460,045)
<REALIZED-GAINS-CURRENT> 44,155,187
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<EQUALIZATION> 0
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<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 1,228,172
<NUMBER-OF-SHARES-REDEEMED> (2,260,393)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 74,901,686
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (184,457)
<GROSS-ADVISORY-FEES> 1,067,670
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,292,896
<AVERAGE-NET-ASSETS> 286,937,019
<PER-SHARE-NAV-BEGIN> 20.37
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> 7.39
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 27.74
<EXPENSE-RATIO> 1.20
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>032
<NAME>WM NORTHWEST FUND CL. B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 236,294,083
<INVESTMENTS-AT-VALUE> 367,840,043
<RECEIVABLES> 1,662,231
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<OVERDISTRIBUTION-NII> (460,045)
<ACCUMULATED-NET-GAINS> 43,970,730
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 131,545,960
<NET-ASSETS> 62,642,156
<DIVIDEND-INCOME> 1,413,319
<INTEREST-INCOME> 419,373
<OTHER-INCOME> 0
<EXPENSES-NET> 2,292,737
<NET-INVESTMENT-INCOME> (460,045)
<REALIZED-GAINS-CURRENT> 44,155,187
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<EQUALIZATION> 0
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<NUMBER-OF-SHARES-SOLD> 204,980
<NUMBER-OF-SHARES-REDEEMED> (252,377)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 74,901,686
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (184,457)
<GROSS-ADVISORY-FEES> 1,067,670
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,292,896
<AVERAGE-NET-ASSETS> 57,548,284
<PER-SHARE-NAV-BEGIN> 19.64
<PER-SHARE-NII> (0.12)
<PER-SHARE-GAIN-APPREC> 7.13
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 26.65
<EXPENSE-RATIO> 2.05
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>033
<NAME>WM NORTHWEST FUND CL. S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 236,294,083
<INVESTMENTS-AT-VALUE> 367,840,043
<RECEIVABLES> 1,662,231
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<ACCUM-APPREC-OR-DEPREC> 131,545,960
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<INTEREST-INCOME> 419,373
<OTHER-INCOME> 0
<EXPENSES-NET> 2,292,737
<NET-INVESTMENT-INCOME> (460,045)
<REALIZED-GAINS-CURRENT> 44,155,187
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<NUMBER-OF-SHARES-SOLD> 144
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 74,901,686
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (184,457)
<GROSS-ADVISORY-FEES> 1,067,670
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,292,896
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<PER-SHARE-NAV-BEGIN> 24.89
<PER-SHARE-NII> (0.12)
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<PER-SHARE-DIVIDEND> 0.00
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<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 26.07
<EXPENSE-RATIO> 2.23
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 061
<NAME> WM TAX-EXEMPT BOND FUND CL A
<S> <C>
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<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 308,698,803
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<SHARES-COMMON-PRIOR> 37,130,057
<ACCUMULATED-NII-CURRENT> 79,147
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<ACCUM-APPREC-OR-DEPREC> 28,471,300
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<EXPENSES-NET> 1,469,212
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<NUMBER-OF-SHARES-SOLD> 3,222,310
<NUMBER-OF-SHARES-REDEEMED> (3,557,893)
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<ACCUMULATED-NII-PRIOR> 79,147
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (1,244,807)
<GROSS-ADVISORY-FEES> 752,792
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,470,835
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<PER-SHARE-NAV-BEGIN> 8.11
<PER-SHARE-NII> 0.20
<PER-SHARE-GAIN-APPREC> (0.09)
<PER-SHARE-DIVIDEND> (0.20)
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 062
<NAME> WM TAX-EXEMPT BOND FUND CL B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 308,698,803
<INVESTMENTS-AT-VALUE> 337,251,841
<RECEIVABLES> 5,407,711
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 57,092
<TOTAL-ASSETS> 342,716,644
<PAYABLE-FOR-SECURITIES> 19,428,566
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,559,726
<TOTAL-LIABILITIES> 20,988,292
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 20,833,957
<SHARES-COMMON-STOCK> 2,679,924
<SHARES-COMMON-PRIOR> 2,138,001
<ACCUMULATED-NII-CURRENT> 79,147
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<ACCUMULATED-NET-GAINS> 1,482,875
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 28,471,300
<NET-ASSETS> 21,493,060
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 9,414,029
<OTHER-INCOME> 0
<EXPENSES-NET> 1,469,212
<NET-INVESTMENT-INCOME> 7,944,817
<REALIZED-GAINS-CURRENT> 2,727,682
<APPREC-INCREASE-CURRENT> (5,644,103)
<NET-CHANGE-FROM-OPS> 5,028,396
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (422,872)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 700,028
<NUMBER-OF-SHARES-REDEEMED> (198,471)
<SHARES-REINVESTED> 40,366
<NET-CHANGE-IN-ASSETS> 3,219,050
<ACCUMULATED-NII-PRIOR> 79,147
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (1,244,807)
<GROSS-ADVISORY-FEES> 752,792
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,470,835
<AVERAGE-NET-ASSETS> 19,805,572
<PER-SHARE-NAV-BEGIN> 8.11
<PER-SHARE-NII> 0.17
<PER-SHARE-GAIN-APPREC> (0.09)
<PER-SHARE-DIVIDEND> (0.17)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 8.02
<EXPENSE-RATIO> 1.65
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 064
<NAME> WM TAX-EXEMPT BOND FUND CL I
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 308,698,803
<INVESTMENTS-AT-VALUE> 337,251,841
<RECEIVABLES> 5,407,711
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 57,092
<TOTAL-ASSETS> 342,716,644
<PAYABLE-FOR-SECURITIES> 19,428,566
<SENIOR-LONG-TERM-DEBT> 0
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<TOTAL-LIABILITIES> 20,988,292
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<PAID-IN-CAPITAL-COMMON> 1,119
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<SHARES-COMMON-PRIOR> 149
<ACCUMULATED-NII-CURRENT> 79,147
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,482,875
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 28,471,300
<NET-ASSETS> 1,227
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 9,414,029
<OTHER-INCOME> 0
<EXPENSES-NET> 1,469,212
<NET-INVESTMENT-INCOME> 7,944,817
<REALIZED-GAINS-CURRENT> 2,727,682
<APPREC-INCREASE-CURRENT> (5,644,103)
<NET-CHANGE-FROM-OPS> 5,028,396
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (32)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 4
<NET-CHANGE-IN-ASSETS> 3,219,050
<ACCUMULATED-NII-PRIOR> 79,147
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (1,244,807)
<GROSS-ADVISORY-FEES> 752,792
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,470,835
<AVERAGE-NET-ASSETS> 1,214
<PER-SHARE-NAV-BEGIN> 8.11
<PER-SHARE-NII> 0.21
<PER-SHARE-GAIN-APPREC> (0.09)
<PER-SHARE-DIVIDEND> (0.21)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 8.02
<EXPENSE-RATIO> 0.60
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 063
<NAME> WM TAX-EXEMPT BOND FUND CL S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 308,698,803
<INVESTMENTS-AT-VALUE> 337,251,841
<RECEIVABLES> 5,407,711
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 57,092
<TOTAL-ASSETS> 342,716,644
<PAYABLE-FOR-SECURITIES> 19,428,566
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,559,726
<TOTAL-LIABILITIES> 20,988,292
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,349
<SHARES-COMMON-STOCK> 184
<SHARES-COMMON-PRIOR> 180
<ACCUMULATED-NII-CURRENT> 79,147
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,482,875
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 28,471,300
<NET-ASSETS> 1,475
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 9,414,029
<OTHER-INCOME> 0
<EXPENSES-NET> 1,469,212
<NET-INVESTMENT-INCOME> 7,944,817
<REALIZED-GAINS-CURRENT> 2,727,682
<APPREC-INCREASE-CURRENT> (5,644,103)
<NET-CHANGE-FROM-OPS> 5,028,396
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (32)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 4
<NET-CHANGE-IN-ASSETS> 3,219,050
<ACCUMULATED-NII-PRIOR> 79,147
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (1,244,807)
<GROSS-ADVISORY-FEES> 752,792
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,470,835
<AVERAGE-NET-ASSETS> 1,471
<PER-SHARE-NAV-BEGIN> 8.11
<PER-SHARE-NII> 0.18
<PER-SHARE-GAIN-APPREC> (0.09)
<PER-SHARE-DIVIDEND> (0.18)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 8.02
<EXPENSE-RATIO> 4.16
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 081
<NAME> WM TAX-EXEMPT MONEY MARKET CL A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 38,047,859
<INVESTMENTS-AT-VALUE> 38,047,859
<RECEIVABLES> 847,360
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 5,461
<TOTAL-ASSETS> 38,900,680
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 225,727
<TOTAL-LIABILITIES> 225,727
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 38,656,052
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<SHARES-COMMON-PRIOR> 25,441,005
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 38,656,093
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 491,232
<OTHER-INCOME> 0
<EXPENSES-NET> 87,285
<NET-INVESTMENT-INCOME> 403,947
<REALIZED-GAINS-CURRENT> 25
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 403,972
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (403,089)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 41,155,194
<NUMBER-OF-SHARES-REDEEMED> (28,326,531)
<SHARES-REINVESTED> 386,384
<NET-CHANGE-IN-ASSETS> 13,021,842
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (3)
<GROSS-ADVISORY-FEES> 68,983
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 146,229
<AVERAGE-NET-ASSETS> 30,804,922
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.013
<PER-SHARE-GAIN-APPREC> 0.0000
<PER-SHARE-DIVIDEND> (0.013)
<PER-SHARE-DISTRIBUTIONS> 0.0000
<RETURNS-OF-CAPITAL> 0.0000
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.56
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 082
<NAME> WM TAX-EXEMPT MONEY MARKET CL B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 38,047,859
<INVESTMENTS-AT-VALUE> 38,047,859
<RECEIVABLES> 847,360
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 5,461
<TOTAL-ASSETS> 38,900,680
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 225,727
<TOTAL-LIABILITIES> 225,727
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 18,879
<SHARES-COMMON-STOCK> 18,879
<SHARES-COMMON-PRIOR> 212,109
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 18,860
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 491,232
<OTHER-INCOME> 0
<EXPENSES-NET> 87,285
<NET-INVESTMENT-INCOME> 403,947
<REALIZED-GAINS-CURRENT> 25
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 403,972
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (858)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 124,929
<NUMBER-OF-SHARES-REDEEMED> (318,804)
<SHARES-REINVESTED> 645
<NET-CHANGE-IN-ASSETS> 13,021,842
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (3)
<GROSS-ADVISORY-FEES> 68,983
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 146,229
<AVERAGE-NET-ASSETS> 108,385
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.008
<PER-SHARE-GAIN-APPREC> 0.0000
<PER-SHARE-DIVIDEND> (0.008)
<PER-SHARE-DISTRIBUTIONS> 0.0000
<RETURNS-OF-CAPITAL> 0.0000
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 1.57
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>051
<NAME>WM US GOVT SECURITIES FUND CL. A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 435,761,580
<INVESTMENTS-AT-VALUE> 439,522,984
<RECEIVABLES> 6,970,548
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 71,132
<TOTAL-ASSETS> 446,564,664
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<SENIOR-LONG-TERM-DEBT> 0
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<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 391,291,886
<SHARES-COMMON-STOCK> 31,231,697
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<ACCUMULATED-NII-CURRENT> 0
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<OVERDISTRIBUTION-GAINS> (68,454,591)
<ACCUM-APPREC-OR-DEPREC> 3,761,404
<NET-ASSETS> 337,867,394
<DIVIDEND-INCOME> 0
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<EXPENSES-NET> 1,775,880
<NET-INVESTMENT-INCOME> 10,024,862
<REALIZED-GAINS-CURRENT> 479,523
<APPREC-INCREASE-CURRENT> (6,229,817)
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<DISTRIBUTIONS-OF-INCOME> (8,114,139)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 10,470,725
<NUMBER-OF-SHARES-REDEEMED> (4,018,530)
<SHARES-REINVESTED> 519,806
<NET-CHANGE-IN-ASSETS> 104,348,080
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (467,853)
<OVERDIST-NET-GAINS-PRIOR> (68,934,114)
<GROSS-ADVISORY-FEES> 929,068
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,989,713
<AVERAGE-NET-ASSETS> 284,687,874
<PER-SHARE-NAV-BEGIN> 10.98
<PER-SHARE-NII> 0.31
<PER-SHARE-GAIN-APPREC> (0.16)
<PER-SHARE-DIVIDEND> (0.31)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.82
<EXPENSE-RATIO> 0.94
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>052
<NAME>WM US GOVT SECURITIES FUND CL. B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 435,761,580
<INVESTMENTS-AT-VALUE> 439,522,984
<RECEIVABLES> 6,970,548
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 71,132
<TOTAL-ASSETS> 446,564,664
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<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,839,421
<TOTAL-LIABILITIES> 1,839,421
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 58,391,383
<SHARES-COMMON-STOCK> 5,044,079
<SHARES-COMMON-PRIOR> 2,619,697
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (360,718)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (68,454,591)
<ACCUM-APPREC-OR-DEPREC> 3,761,404
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<DIVIDEND-INCOME> 0
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<EXPENSES-NET> 1,775,880
<NET-INVESTMENT-INCOME> 10,024,862
<REALIZED-GAINS-CURRENT> 479,523
<APPREC-INCREASE-CURRENT> (6,229,817)
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<DISTRIBUTIONS-OF-INCOME> (949,243)
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 2,794,860
<NUMBER-OF-SHARES-REDEEMED> (437,930)
<SHARES-REINVESTED> 67,452
<NET-CHANGE-IN-ASSETS> 104,348,080
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (467,853)
<OVERDIST-NET-GAINS-PRIOR> (68,934,114)
<GROSS-ADVISORY-FEES> 929,068
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,989,713
<AVERAGE-NET-ASSETS> 39,324,134
<PER-SHARE-NAV-BEGIN> 10.97
<PER-SHARE-NII> 0.27
<PER-SHARE-GAIN-APPREC> (0.16)
<PER-SHARE-DIVIDEND> (0.27)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.81
<EXPENSE-RATIO> 1.69
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>054
<NAME>WM US GOVT SECURITIES FUND CL. I
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 435,761,580
<INVESTMENTS-AT-VALUE> 439,522,984
<RECEIVABLES> 6,970,548
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 71,132
<TOTAL-ASSETS> 446,564,664
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<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,839,421
<TOTAL-LIABILITIES> 1,839,421
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 55,263,230
<SHARES-COMMON-STOCK> 4,468,760
<SHARES-COMMON-PRIOR> 3,634,160
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (360,718)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (68,454,591)
<ACCUM-APPREC-OR-DEPREC> 3,761,404
<NET-ASSETS> 48,363,954
<DIVIDEND-INCOME> 0
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<EXPENSES-NET> 1,775,880
<NET-INVESTMENT-INCOME> 10,024,862
<REALIZED-GAINS-CURRENT> 479,523
<APPREC-INCREASE-CURRENT> (6,229,817)
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<DISTRIBUTIONS-OF-INCOME> (746,011)
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 2,953,307
<NUMBER-OF-SHARES-REDEEMED> (2,176,338)
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<NET-CHANGE-IN-ASSETS> 104,348,080
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (467,853)
<OVERDIST-NET-GAINS-PRIOR> (68,934,114)
<GROSS-ADVISORY-FEES> 929,068
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,989,713
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<PER-SHARE-NAV-BEGIN> 10.99
<PER-SHARE-NII> 0.32
<PER-SHARE-GAIN-APPREC> (0.17)
<PER-SHARE-DIVIDEND> (0.32)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.82
<EXPENSE-RATIO> 0.59
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>053
<NAME>WM US GOVT SECURITIES FUND CL. S
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 435,761,580
<INVESTMENTS-AT-VALUE> 439,522,984
<RECEIVABLES> 6,970,548
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<TOTAL-ASSETS> 446,564,664
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<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,839,421
<TOTAL-LIABILITIES> 1,839,421
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,832,649
<SHARES-COMMON-STOCK> 366,421
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<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (360,718)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (68,454,591)
<ACCUM-APPREC-OR-DEPREC> 3,761,404
<NET-ASSETS> 3,965,924
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 11,800,742
<OTHER-INCOME> 0
<EXPENSES-NET> 1,775,880
<NET-INVESTMENT-INCOME> 10,024,862
<REALIZED-GAINS-CURRENT> 479,523
<APPREC-INCREASE-CURRENT> (6,229,817)
<NET-CHANGE-FROM-OPS> 4,274,568
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (108,334)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,116
<NUMBER-OF-SHARES-REDEEMED> (136,461)
<SHARES-REINVESTED> 9,194
<NET-CHANGE-IN-ASSETS> 104,348,080
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (467,853)
<OVERDIST-NET-GAINS-PRIOR> (68,934,114)
<GROSS-ADVISORY-FEES> 929,068
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,989,713
<AVERAGE-NET-ASSETS> 4,407,118
<PER-SHARE-NAV-BEGIN> 10.99
<PER-SHARE-NII> 0.27
<PER-SHARE-GAIN-APPREC> (0.17)
<PER-SHARE-DIVIDEND> (0.27)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.82
<EXPENSE-RATIO> 1.89
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.0000
</TABLE>
