WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Class	Cusip	Orig Prin Bal	Begin Prin Bal	Int Rate Accrued	Int Rate Paid	Int Dist	Prin Dist	Int Shortfall	Prin Loss	Deferred Interest	Int Reimbursed	Unscheduled Int	Prin Reimbursed	Subsequent Recoveries	Total Dist	Ending Class Bal
IA1	939335NX9	$193,536,000.00	$14,764,374.63	6.5000000000%	6.5000000000%	$79,973.70	$2,422,892.71	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$2,502,866.40	$12,341,481.92
IIA1	939335NY7	$67,739,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA2	939335NZ4	$82,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA3	939335PA7	$5,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA4	939335PB5	$5,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA5	939335PC3	$1,500,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA6	939335PD1	$1,500,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA7	939335PE9	$1,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA8	939335PF6	$1,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA9	939335PG4	$21,258,740.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA10	939335PH2	$418,900.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA11	939335PJ8	$134,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA12	939335PK5	$19,010,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA13	939335PL3	$571,100.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA14	939335PM1	$200,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA15	939335PN9	$17,700,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA16	939335PP4	$4,252,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA17	939335PQ2	$100,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA18	939335PR0	$20,552,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA19	939335PS8	$24,130,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA20	939335PT6	$10,180,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA21	939335PU3	$20,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA22	939335PV1	$32,250,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA23	939335PW9	$2,283,555.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA24	939335PX7	$50,000,000.00	$13,328,210.14	6.6900000000%	6.6900000000%	$74,304.77	$3,414,319.58	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$3,488,624.35	$9,913,890.56
IIA25	939335PY5	$93,700,000.00	$24,977,065.80	6.7500000000%	6.7500000000%	$140,496.00	$6,398,434.90	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$6,538,930.89	$18,578,630.90
IIA26	939335PZ2	$1,100,000.00	$293,220.62	6.7500000000%	6.7500000000%	$1,649.37	$75,115.03	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$76,764.40	$218,105.59
IIA27	939335QA6	$700,000.00	$186,594.94	6.7500000000%	6.7500000000%	$1,049.60	$47,800.47	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$48,850.07	$138,794.47
IIA28	939335QB4	$4,500,000.00	$1,199,538.91	6.7500000000%	6.7500000000%	$6,747.41	$307,288.76	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$314,036.17	$892,250.15
IIA29	939335QC2	$11,500,000.00	$0.01	7.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.01
IIA30	939335QD0	$426,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Class	Cusip	Orig Prin Bal	Begin Prin Bal	Int Rate Accrued	Int Rate Paid	Int Dist	Prin Dist	Int Shortfall	Prin Loss	Deferred Interest	Int Reimbursed	Unscheduled Int	Prin Reimbursed	Subsequent Recoveries	Total Dist	Ending Class Bal
IX	939335QE8	$3,633,886.00	$226,414.18	6.5000000000%	6.5000000000%	$1,226.41	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,226.41	$141,121.79
IIX	939335QF5	$4,771,742.00	$375,193.15	6.7500000000%	6.7500000000%	$2,110.46	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$2,110.46	$323,734.91
IP	939335QG3	$1,363,770.00	$176,421.36	0.0000000000%	0.0000000000%	$0.00	$15,712.46	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$15,712.46	$160,708.90
IIP	939335QH1	$3,037,870.00	$349,809.81	0.0000000000%	0.0000000000%	$0.00	$37,985.34	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$37,985.34	$311,824.47
IB1	939335QJ7	$1,385,000.00	$1,249,817.37	6.5000000000%	6.5000000000%	$6,769.84	$5,889.71	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$12,659.56	$1,243,927.66
IB2	939335QK4	$692,000.00	$624,457.48	6.5000000000%	6.5000000000%	$3,382.48	$2,942.73	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$6,325.21	$621,514.75
IB3	939335QL2	$395,000.00	$356,446.09	6.5000000000%	6.5000000000%	$1,930.75	$1,679.74	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$3,610.49	$354,766.35
IB4	939335QS7	$197,000.00	$177,771.84	6.5000000000%	6.5000000000%	$962.93	$837.74	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,800.67	$176,934.10
IB5	939335QT5	$197,000.00	$177,771.84	6.5000000000%	6.5000000000%	$962.93	$837.74	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,800.67	$176,934.10
IB6	939335QU2	$202,547.00	$182,777.54	6.5000000000%	6.5000000000%	$990.05	$861.35	$0.00	$0.00	$0.00	$0.00	$0.00	$0.02	$0.00	$1,851.39	$181,916.21
IIB1	939335QM0	$15,582,000.00	$15,211,223.33	6.7500000000%	6.7500000000%	$85,563.13	$14,921.82	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$100,484.95	$15,196,301.51
IIB2	939335QN8	$5,666,000.00	$5,531,176.46	6.7500000000%	6.7500000000%	$31,112.87	$5,425.94	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$36,538.81	$5,525,750.52
IIB3	939335QP3	$4,249,000.00	$4,147,894.22	6.7500000000%	6.7500000000%	$23,331.90	$4,068.98	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$27,400.88	$4,143,825.24
IIB4	939335QV0	$2,833,000.00	$2,765,588.23	6.7500000000%	6.7500000000%	$15,556.43	$2,712.97	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$18,269.40	$2,762,875.26
IIB5	939335QW8	$1,416,000.00	$1,382,306.00	6.7500000000%	6.7500000000%	$7,775.47	$1,356.01	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$9,131.48	$1,380,949.99
IIB6	939335QX6	$1,891,975.00	$1,846,955.39	6.7500000000%	6.7500000000%	$10,389.12	$1,811.87	$0.00	$0.00	$0.00	$0.00	$0.00	$0.05	$0.00	$12,200.99	$1,845,143.57
R1	939335QQ1	$50.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R2	939335QR9	$50.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
AMBAC	XXXXXXXXX	$0.00	$0.00	0.0000000000%	0.0000000000%	$666.41	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$666.41	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA3_ROUND	XXXXXXXXX	$5,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA5_ROUND	XXXXXXXXX	$1,500,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA7_ROUND	XXXXXXXXX	$1,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total		$1,142,373,262.00	$88,929,422.01			$496,952.02	$12,762,895.85	$0.00	$0.00	$0.00	$0.00	$0.00	$0.07	$0.00	$13,259,847.87	$76,166,526.23

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA1	$193,536,000.00	$14,764,374.63	$0.00	$0.00	$0.00	$0.00	$2,422,892.71	0.0637684044	$12,341,481.92
IIA1	$67,739,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA2	$82,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA3	$5,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA4	$5,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA5	$1,500,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA6	$1,500,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA7	$1,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA8	$1,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA9	$21,258,740.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA10	$418,900.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA11	$134,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA12	$19,010,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA13	$571,100.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA14	$200,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA15	$17,700,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA16	$4,252,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA17	$100,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA18	$20,552,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA19	$24,130,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA20	$10,180,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA21	$20,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA22	$32,250,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA23	$2,283,555.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA24	$50,000,000.00	$13,328,210.14	$0.00	$0.00	$0.00	$0.00	$3,414,319.58	0.1982778112	$9,913,890.56
IIA25	$93,700,000.00	$24,977,065.80	$0.00	$0.00	$0.00	$0.00	$6,398,434.90	0.1982778111	$18,578,630.90
IIA26	$1,100,000.00	$293,220.62	$0.00	$0.00	$0.00	$0.00	$75,115.03	0.1982778091	$218,105.59
IIA27	$700,000.00	$186,594.94	$0.00	$0.00	$0.00	$0.00	$47,800.47	0.1982778143	$138,794.47
IIA28	$4,500,000.00	$1,199,538.91	$0.00	$0.00	$0.00	$0.00	$307,288.76	0.1982778111	$892,250.15
IIA29	$11,500,000.00	$0.01	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000009	$0.01
IIA30	$426,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IX	$3,633,886.00	$226,414.18	$0.00	$0.00	$0.00	$0.00	$0.00	0.0388349524	$141,121.79
IIX	$4,771,742.00	$375,193.15	$0.00	$0.00	$0.00	$0.00	$0.00	0.0678441772	$323,734.91
IP	$1,363,770.00	$176,421.36	$0.00	$0.00	$0.00	$0.00	$15,712.46	0.1178416449	$160,708.90
IIP	$3,037,870.00	$349,809.81	$0.00	$0.00	$0.00	$0.00	$37,985.34	0.1026457584	$311,824.47
IB1	$1,385,000.00	$1,249,817.37	$0.00	$0.00	$0.00	$0.00	$5,889.71	0.8981427148	$1,243,927.66
IB2	$692,000.00	$624,457.48	$0.00	$0.00	$0.00	$0.00	$2,942.73	0.8981427023	$621,514.75
IB3	$395,000.00	$356,446.09	$0.00	$0.00	$0.00	$0.00	$1,679.74	0.8981426582	$354,766.35
IB4	$197,000.00	$177,771.84	$0.00	$0.00	$0.00	$0.00	$837.74	0.8981426396	$176,934.10
IB5	$197,000.00	$177,771.84	$0.00	$0.00	$0.00	$0.00	$837.74	0.8981426396	$176,934.10
IB6	$202,547.00	$182,777.54	$0.00	$0.02	$0.00	$0.00	$861.35	0.8981431964	$181,916.21
IIB1	$15,582,000.00	$15,211,223.33	$0.00	$0.00	$0.00	$0.00	$14,921.82	0.9752471769	$15,196,301.51
IIB2	$5,666,000.00	$5,531,176.46	$0.00	$0.00	$0.00	$0.00	$5,425.94	0.9752471797	$5,525,750.52
IIB3	$4,249,000.00	$4,147,894.22	$0.00	$0.00	$0.00	$0.00	$4,068.98	0.9752471735	$4,143,825.24
IIB4	$2,833,000.00	$2,765,588.23	$0.00	$0.00	$0.00	$0.00	$2,712.97	0.9752471797	$2,762,875.26
IIB5	$1,416,000.00	$1,382,306.00	$0.00	$0.00	$0.00	$0.00	$1,356.01	0.9752471681	$1,380,949.99
IIB6	$1,891,975.00	$1,846,955.39	$0.00	$0.05	$0.00	$0.00	$1,811.87	0.9752473315	$1,845,143.57
R1	$50.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
R2	$50.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
AMBAC	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
R_SYN	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA3_ROUND	$5,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA5_ROUND	$1,500,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA7_ROUND	$1,000,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
Total	$1,142,373,262.00	$88,929,422.01	$0.00	$0.07	$0.00	$0.00	$12,762,895.85	0.0666739399	$76,166,526.23

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003
PER $1000 DENOMINATION
Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA1	$193,536,000.00	76.28748465	0.00000000	0.00000000	0.00000000	0.00000000	12.51908022	0.0637684044	63.76840443
IIA1	$67,739,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA2	$82,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA3	$5,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA4	$5,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA5	$1,500,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA6	$1,500,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA7	$1,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA8	$1,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA9	$21,258,740.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA10	$418,900.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA11	$134,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA12	$19,010,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA13	$571,100.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA14	$200,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA15	$17,700,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA16	$4,252,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA17	$100,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA18	$20,552,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA19	$24,130,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA20	$10,180,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA21	$20,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA22	$32,250,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA23	$2,283,555.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA24	$50,000,000.00	266.56420280	0.00000000	0.00000000	0.00000000	0.00000000	68.28639160	0.1982778112	198.27781120
IIA25	$93,700,000.00	266.56420277	0.00000000	0.00000000	0.00000000	0.00000000	68.28639168	0.1982778111	198.27781110
IIA26	$1,100,000.00	266.56420000	0.00000000	0.00000000	0.00000000	0.00000000	68.28639091	0.1982778091	198.27780909
IIA27	$700,000.00	266.56420000	0.00000000	0.00000000	0.00000000	0.00000000	68.28638571	0.1982778143	198.27781429
IIA28	$4,500,000.00	266.56420222	0.00000000	0.00000000	0.00000000	0.00000000	68.28639111	0.1982778111	198.27781111
IIA29	$11,500,000.00	0.00000087	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000009	0.00000087
IIA30	$426,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003
PER $1000 DENOMINATION
Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IX	$3,633,886.00	62.30635193	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0388349524	38.83495244
IIX	$4,771,742.00	78.62812994	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0678441772	67.84417724
IP	$1,363,770.00	129.36298643	0.00000000	0.00000000	0.00000000	0.00000000	11.52134158	0.1178416449	117.84164485
IIP	$3,037,870.00	115.14969699	0.00000000	0.00000000	0.00000000	0.00000000	12.50393861	0.1026457584	102.64575838
IB1	$1,385,000.00	902.39521300	0.00000000	0.00000000	0.00000000	0.00000000	4.25249819	0.8981427148	898.14271480
IB2	$692,000.00	902.39520231	0.00000000	0.00000000	0.00000000	0.00000000	4.25250000	0.8981427023	898.14270231
IB3	$395,000.00	902.39516456	0.00000000	0.00000000	0.00000000	0.00000000	4.25250633	0.8981426582	898.14265823
IB4	$197,000.00	902.39512690	0.00000000	0.00000000	0.00000000	0.00000000	4.25248731	0.8981426396	898.14263959
IB5	$197,000.00	902.39512690	0.00000000	0.00000000	0.00000000	0.00000000	4.25248731	0.8981426396	898.14263959
IB6	$202,547.00	902.39569088	0.00000000	0.00009874	0.00000000	0.00000000	4.25259323	0.8981431964	898.14319639
IIB1	$15,582,000.00	976.20480875	0.00000000	0.00000000	0.00000000	0.00000000	0.95763188	0.9752471769	975.24717687
IIB2	$5,666,000.00	976.20481115	0.00000000	0.00000000	0.00000000	0.00000000	0.95763149	0.9752471797	975.24717967
IIB3	$4,249,000.00	976.20480584	0.00000000	0.00000000	0.00000000	0.00000000	0.95763238	0.9752471735	975.24717345
IIB4	$2,833,000.00	976.20481115	0.00000000	0.00000000	0.00000000	0.00000000	0.95763149	0.9752471797	975.24717967
IIB5	$1,416,000.00	976.20480226	0.00000000	0.00000000	0.00000000	0.00000000	0.95763418	0.9752471681	975.24716808
IIB6	$1,891,975.00	976.20496571	0.00000000	0.00002643	0.00000000	0.00000000	0.95766065	0.9752473315	975.24733149
R1	$50.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
R2	$50.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
AMBAC	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
R_SYN	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA3_ROUND	$5,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA5_ROUND	$1,500,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA7_ROUND	$1,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA1	$193,536,000.00	6.5000000000%	6.5000000000%	$14,764,374.63	$79,973.70	$0.00	$0.00	$0.00	$79,973.70
IIA1	$67,739,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA2	$82,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA3	$5,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA4	$5,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA5	$1,500,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA6	$1,500,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA7	$1,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA8	$1,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA9	$21,258,740.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA10	$418,900.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA11	$134,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA12	$19,010,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA13	$571,100.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA14	$200,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA15	$17,700,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA16	$4,252,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA17	$100,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA18	$20,552,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA19	$24,130,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA20	$10,180,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA21	$20,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA22	$32,250,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA23	$2,283,555.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA24	$50,000,000.00	6.6900000000%	6.6900000000%	$13,328,210.14	$74,304.77	$0.00	$0.00	$0.00	$74,304.77
IIA25	$93,700,000.00	6.7500000000%	6.7500000000%	$24,977,065.80	$140,496.00	$0.00	$0.00	$0.00	$140,496.00
IIA26	$1,100,000.00	6.7500000000%	6.7500000000%	$293,220.62	$1,649.37	$0.00	$0.00	$0.00	$1,649.37
IIA27	$700,000.00	6.7500000000%	6.7500000000%	$186,594.94	$1,049.60	$0.00	$0.00	$0.00	$1,049.60
IIA28	$4,500,000.00	6.7500000000%	6.7500000000%	$1,199,538.91	$6,747.41	$0.00	$0.00	$0.00	$6,747.41
IIA29	$11,500,000.00	7.0000000000%	0.0000000000%	$0.01	$0.00	$0.00	$0.00	$0.00	$0.00
IIA30	$426,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IX	$3,633,886.00	6.5000000000%	6.5000000000%	$226,414.18	$1,226.41	$0.00	$0.00	$0.00	$1,226.41
IIX	$4,771,742.00	6.7500000000%	6.7500000000%	$375,193.15	$2,110.46	$0.00	$0.00	$0.00	$2,110.46
IP	$1,363,770.00	0.0000000000%	0.0000000000%	$176,421.36	$0.00	$0.00	$0.00	$0.00	$0.00
IIP	$3,037,870.00	0.0000000000%	0.0000000000%	$349,809.81	$0.00	$0.00	$0.00	$0.00	$0.00
IB1	$1,385,000.00	6.5000000000%	6.5000000000%	$1,249,817.37	$6,769.84	$0.00	$0.00	$0.00	$6,769.84
IB2	$692,000.00	6.5000000000%	6.5000000000%	$624,457.48	$3,382.48	$0.00	$0.00	$0.00	$3,382.48
IB3	$395,000.00	6.5000000000%	6.5000000000%	$356,446.09	$1,930.75	$0.00	$0.00	$0.00	$1,930.75
IB4	$197,000.00	6.5000000000%	6.5000000000%	$177,771.84	$962.93	$0.00	$0.00	$0.00	$962.93
IB5	$197,000.00	6.5000000000%	6.5000000000%	$177,771.84	$962.93	$0.00	$0.00	$0.00	$962.93
IB6	$202,547.00	6.5000000000%	6.5000000000%	$182,777.54	$990.05	$0.00	$0.00	$0.00	$990.05
IIB1	$15,582,000.00	6.7500000000%	6.7500000000%	$15,211,223.33	$85,563.13	$0.00	$0.00	$0.00	$85,563.13
IIB2	$5,666,000.00	6.7500000000%	6.7500000000%	$5,531,176.46	$31,112.87	$0.00	$0.00	$0.00	$31,112.87
IIB3	$4,249,000.00	6.7500000000%	6.7500000000%	$4,147,894.22	$23,331.90	$0.00	$0.00	$0.00	$23,331.90
IIB4	$2,833,000.00	6.7500000000%	6.7500000000%	$2,765,588.23	$15,556.43	$0.00	$0.00	$0.00	$15,556.43
IIB5	$1,416,000.00	6.7500000000%	6.7500000000%	$1,382,306.00	$7,775.47	$0.00	$0.00	$0.00	$7,775.47
IIB6	$1,891,975.00	6.7500000000%	6.7500000000%	$1,846,955.39	$10,389.12	$0.00	$0.00	$0.00	$10,389.12
R1	$50.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R2	$50.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
AMBAC	$0.00	0.0000000000%	0.0000000000%	$0.00	$666.41	$0.00	$0.00	$0.00	$666.41
R_SYN	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA3_ROUND	$5,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA5_ROUND	$1,500,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA7_ROUND	$1,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total	$1,142,373,262.00			$88,929,422.01	$496,952.02	$0.00	$0.00	$0.00	$496,952.02

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003
PER $1000 DENOMINATION
Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA1	$193,536,000.00	6.5000000000%	6.5000000000%	76.28748465	0.41322390	0.00000000	0.00000000	0.00000000	0.41322390
IIA1	$67,739,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA2	$82,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA3	$5,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA4	$5,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA5	$1,500,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA6	$1,500,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA7	$1,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA8	$1,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA9	$21,258,740.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA10	$418,900.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA11	$134,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA12	$19,010,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA13	$571,100.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA14	$200,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA15	$17,700,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA16	$4,252,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA17	$100,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA18	$20,552,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA19	$24,130,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA20	$10,180,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA21	$20,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA22	$32,250,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA23	$2,283,555.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA24	$50,000,000.00	6.6900000000%	6.6900000000%	266.56420280	1.48609540	0.00000000	0.00000000	0.00000000	1.48609540
IIA25	$93,700,000.00	6.7500000000%	6.7500000000%	266.56420277	1.49942369	0.00000000	0.00000000	0.00000000	1.49942369
IIA26	$1,100,000.00	6.7500000000%	6.7500000000%	266.56420000	1.49942727	0.00000000	0.00000000	0.00000000	1.49942727
IIA27	$700,000.00	6.7500000000%	6.7500000000%	266.56420000	1.49942857	0.00000000	0.00000000	0.00000000	1.49942857
IIA28	$4,500,000.00	6.7500000000%	6.7500000000%	266.56420222	1.49942444	0.00000000	0.00000000	0.00000000	1.49942444
IIA29	$11,500,000.00	7.0000000000%	0.0000000000%	0.00000087	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA30	$426,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003
PER $1000 DENOMINATION
Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IX	$3,633,886.00	6.5000000000%	6.5000000000%	62.30635193	0.33749270	0.00000000	0.00000000	0.00000000	0.33749270
IIX	$4,771,742.00	6.7500000000%	6.7500000000%	78.62812994	0.44228292	0.00000000	0.00000000	0.00000000	0.44228292
IP	$1,363,770.00	0.0000000000%	0.0000000000%	129.36298643	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIP	$3,037,870.00	0.0000000000%	0.0000000000%	115.14969699	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IB1	$1,385,000.00	6.5000000000%	6.5000000000%	902.39521300	4.88797112	0.00000000	0.00000000	0.00000000	4.88797112
IB2	$692,000.00	6.5000000000%	6.5000000000%	902.39520231	4.88797688	0.00000000	0.00000000	0.00000000	4.88797688
IB3	$395,000.00	6.5000000000%	6.5000000000%	902.39516456	4.88797468	0.00000000	0.00000000	0.00000000	4.88797468
IB4	$197,000.00	6.5000000000%	6.5000000000%	902.39512690	4.88796954	0.00000000	0.00000000	0.00000000	4.88796954
IB5	$197,000.00	6.5000000000%	6.5000000000%	902.39512690	4.88796954	0.00000000	0.00000000	0.00000000	4.88796954
IB6	$202,547.00	6.5000000000%	6.5000000000%	902.39569088	4.88800130	0.00000000	0.00000000	0.00000000	4.88800130
IIB1	$15,582,000.00	6.7500000000%	6.7500000000%	976.20480875	5.49115197	0.00000000	0.00000000	0.00000000	5.49115197
IIB2	$5,666,000.00	6.7500000000%	6.7500000000%	976.20481115	5.49115249	0.00000000	0.00000000	0.00000000	5.49115249
IIB3	$4,249,000.00	6.7500000000%	6.7500000000%	976.20480584	5.49115086	0.00000000	0.00000000	0.00000000	5.49115086
IIB4	$2,833,000.00	6.7500000000%	6.7500000000%	976.20481115	5.49115072	0.00000000	0.00000000	0.00000000	5.49115072
IIB5	$1,416,000.00	6.7500000000%	6.7500000000%	976.20480226	5.49115113	0.00000000	0.00000000	0.00000000	5.49115113
IIB6	$1,891,975.00	6.7500000000%	6.7500000000%	976.20496571	5.49115078	0.00000000	0.00000000	0.00000000	5.49115078
R1	$50.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
R2	$50.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
AMBAC	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
R_SYN	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA3_ROUND	$5,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA5_ROUND	$1,500,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA7_ROUND	$1,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
SERIES: WAMU 01S8
WEIGHTED AVERAGE PC RATE: 6.51835%
WEIGHTED AVERAGE MATURITY: 143.01328
WEIGHTED AVERAGE LOAN AGE: 31.28988
POOL NUMBER: 1749
ISSUE DATE: 07/30/2001
CERTIFICATE BALANCE AT ISSUE: $197,968,317.00
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	55		$17,709,838.17
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$83,407.57
Unscheduled Principal Collection/Reversals		$3,631.87
Liquidations-in-full	7	$2,364,614.72
Subsequent Recoveries		$0.00
Net principal Distributed		$2,451,654.16	-$2,451,654.16

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	48		$15,258,184.01

SCHEDULED INTEREST AT MORTGAGE RATE:		$103,026.84

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$6,827.74

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$2,547,853.26

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
SERIES: WAMU 01S8
WEIGHTED AVERAGE PC RATE: 6.75241%
WEIGHTED AVERAGE MATURITY: 325.09901
WEIGHTED AVERAGE LOAN AGE: 28.81512
POOL NUMBER: 1756
ISSUE DATE: 07/30/2001
CERTIFICATE BALANCE AT ISSUE: $944,404,945.00
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	191		$71,219,583.86
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$69,901.06
Unscheduled Principal Collection/Reversals		$208,574.12
Liquidations-in-full	26	$10,032,766.44
Subsequent Recoveries		$0.00
Net principal Distributed		$10,311,241.62	-$10,311,241.62

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	165		$60,908,342.24

SCHEDULED INTEREST AT MORTGAGE RATE:		$433,209.26

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$32,456.27

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$10,711,994.61

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
SERIES: WAMU 01S8
WEIGHTED AVERAGE PC RATE: 6.70579%
WEIGHTED AVERAGE MATURITY: 288.62238
WEIGHTED AVERAGE LOAN AGE: 29.31088
POOL NUMBER: ALL
ISSUE DATE: 07/30/2001
CERTIFICATE BALANCE AT ISSUE: $1,142,373,262.00
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	246		$88,929,422.03
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$153,308.63
Unscheduled Principal Collection/Reversals		$212,205.99
Liquidations-in-full	33	$12,397,381.16
Subsequent Recoveries		$0.00
Net principal Distributed		$12,762,895.78	-$12,762,895.78

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	213		$76,166,526.25

SCHEDULED INTEREST AT MORTGAGE RATE:		$536,236.10

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$39,284.01

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$13,259,847.87

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

Distribution by Group
Pool ID		Principal		Interest		Total
Pool - 1749		$2,451,654.16		$96,199.10		$2,547,853.26
Pool - 1756		$10,311,241.62		$400,752.99		$10,711,994.61
Aggregate		$12,762,895.78		$496,952.09		$13,259,847.87

Number of Loans and Aggregate Principal Balance By Group
Pool ID	Beg Bal	Beg Count	Paid Off / Liq Count	Rem Count	Sched Prin End Bal	Sched Prin	Prin PrePay / Liq	Unsched Prin / Rev	Total Prin
Pool - 1749	$17,709,838.17	55	7	48	$15,258,184.01	$83,407.57	$2,364,614.72	$3,631.87	$2,451,654.16
Pool - 1756	$71,219,583.86	191	26	165	$60,908,342.24	$69,901.06	$10,032,766.44	$208,574.12	$10,311,241.62
Aggregate	$88,929,422.03	246	33	213	$76,166,526.25	$153,308.63	$12,397,381.16	$212,205.99	$12,762,895.78

Delinquency Information by Group
Pool ID	1 Month Count	Sched End Balance	2 Months Count	Sched End Balance	3 Months Count	Sched End Balance	4 Months Count	Sched End Balance
Pool - 1749	0	$0.00	1	$336,430.42	0	$0.00	0	$0.00
Pool - 1756	4	$1,886,689.57	0	$0.00	0	$0.00	0	$0.00
Aggregate	4	$1,886,689.57	1	$336,430.42	0	$0.00	0	$0.00

Foreclosure and REO Information by Group
Pool ID		Foreclosure Count		Sched End Balance		REO Count		Sched End Balance
Pool - 1749		1		$248,397.58		0		$0.00
Pool - 1756		1		$558,625.83		1		$464,743.21
Aggregate		2		$807,023.41		1		$464,743.21

Aggregate Loss Amounts by Group
Pool ID			Count			Loss Amount
Group 1(1749)			0			$0.00
Group 2(1756)			0			$0.00
Aggregate			0			$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

INSURANCE RESERVES - Group 1(1749)
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$3,200,681.00	$0.00	$0.00	$0.00	$3,200,681.00
Bankruptcy Bond
Single-Units	$100,000.00	$0.00	$0.00	$0.00	$100,000.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$3,959,366.34	$0.00	$0.00	$0.00	$3,959,366.34

INSURANCE RESERVES - Group 2(1756)
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$9,444,049.00	$0.00	$0.00	$0.00	$9,444,049.00
Bankruptcy Bond
Single-Units	$100,000.00	$0.00	$0.00	$0.00	$100,000.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$28,332,148.36	$0.00	$0.00	$0.00	$28,332,148.36

INSURANCE RESERVES - Aggregate
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$12,644,730.00	$0.00	$0.00	$0.00	$12,644,730.00
Bankruptcy Bond
Single-Units	$200,000.00	$0.00	$0.00	$0.00	$200,000.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$32,291,514.70	$0.00	$0.00	$0.00	$32,291,514.70

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.01S8
Distribution Date: 10/27/2003

The Class Principal Balances of each Class of the Class IB1,IB2,IB3,IB4,IB5,IB6 Certificatesimmediately after the principal and interest distribution on 200310 are as follows:

Class			Class Principal Balance
IB1			$1,243,927.66
IB2			$621,514.75
IB3			$354,766.35
IB4			$176,934.10
IB5			$176,934.10
IB6			$181,916.21
Total			$2,755,993.16
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.

The Class Principal Balances of each Class of the Class IIB1,IIB2,IIB3,IIB4,IIB5,IIB6 Certificatesimmediately after the principal and interest distribution on 200310 are as follows:

Class			Class Principal Balance
IIB1			$15,196,301.51
IIB2			$5,525,750.52
IIB3			$4,143,825.24
IIB4			$2,762,875.26
IIB5			$1,380,949.99
IIB6			$1,845,143.57
Total			$30,854,846.10
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.

WAMU MORTGAGE PASS THROUGH CERT SERIES 2001-S8 8-K