SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
Date of Report (date of earliest event reported): December 19, 2000
Credit Suisse First Boston Mortgage Securities Corp Mortgage-Backed Pass-Through
Certificates, Series 1999-WM1
(Exact name of registrant as specified in its charter)
United States 333-53115 13-3320910
(State or Other Jurisdiction (Commission (I.R.S. Employer
of Incorporation) File Number) Identification No.)
11 Madison Avenue, 5th Floor
New York, New York 10010
(Address of Principal Executive Offices) (Zip Code)
Registrant's telephone number, including area code: (212) 325-2000
Item 5. Other Events
On December 19, 2000 a scheduled distribution was made from the Trust
to holders of the Certificates. The Trustee has caused to be filed with
the Commission, the Monthly Report dated December 19, 2000
The Monthly Report is filed pursuant to and in accordance with
(1) numerous no-action letters (2) current Commission policy
in the area.
A. Monthly Report Information
See Exhibit No.1
B. Have and deficiencies occurred? NO.
Date:
Amount:
C. Item 1: Legal Proceedings: NONE
D. Item 2: Changes in Securities: NONE
E. Item 4: Submission of Matters to a Vote of
Certificateholders: NONE
F. Item 5: Other Information - Form 10-Q, PartII - Items 1,2,4,5
if applicable: NOT APPLICABLE
Item 7. Monthly Statements and Exhibits
Exhibit No.
1.) Monthly Distribution RepoDecember 19, 2000
Washington Mutual Bank, F.A. Mortgage-Backed Pass-Through Certificates
STATEMENT TO CERTIFICATEHOLDERS
Distribution Date: December 19, 2000
DISTRIBUTION SUMMARY
Beginning Current PeriodClass Accrued
Original Current PrincipaPrincipal Pass-Through Interest
Class Face Value Amount Distribution Rate Distributed (1)
1-A-1 222151000.00 166662768.64 5356632.56 6.1895% 859474.71
1-A-2 208709000.00 208709000.00 0.00 6.1895% 1076305.83
2-A-1 257137000.00 217121080.11 5049593.25 6.0161% 1088370.79
2-A-2 147243000.00 147243000.00 0.00 6.0161% 738090.38
3-A-1 599085000.00 503720727.70 12989228.69 6.3985% 2685486.06
3-A-2 350619000.00 350619000.00 0.00 6.3985% 1869254.89
4-A-1 157510000.00 111924100.56 3643159.25 6.9450% 647221.48
4-A-2 108014000.00 108014000.00 0.00 6.9450% 625133.33
5-A-1 350000000.00 167596782.52 14330194.13 6.7284% 939531.09
5-A-2 469803000.00 469803000.00 0.00 6.7284% 2633669.44
5-A-3 200000000.00 200000000.00 0.00 6.7284% 1121406.07
6-A-1 450000000.00 323802509.39 10632035.43 6.8672% 1852544.06
6-A-2 490357000.00 490357000.00 0.00 6.8672% 2805438.26
6-A-3 200000000.00 200000000.00 0.00 6.8672% 1144528.08
7-A 44457000.00 33917788.30 590281.15 7.6095% 215059.55
8-A 61246000.00 56040490.19 875732.51 7.5778% 353866.25
M-1 129023000.00 127600306.11 124929.71 6.6066% 702341.78
M-2 107909000.00 106719123.20 104485.56 6.6066% 587406.88
M-3 60992000.00 60319461.41 59057.01 6.6066% 332012.35
M-4 30495000.00 30158741.74 29527.54 6.6066% 166000.73
B-1 21113000.00 20880193.95 20443.18 6.6066% 114929.45
B-2 11728000.00 11598679.21 11355.93 6.6066% 63841.83
B-3 14079705.76 13924453.49 13633.02 6.6066% 76643.43
R 200.00 0.00 0.00 7.5778% 0.00
TOTAL:4691670905.76 4126732206.52 53830288.92 22698556.72
(1) Interest Distribution includes Reimbursement of Realized Losses
Prepayment Ending
Realized LossInterest Interest Current Principal
Principal Shortfall Shortfall Amount
Class
1-A-1 0.00 0.00 154.15 161306136.08
1-A-2 0.00 0.00 193.03 208709000.00
2-A-1 0.00 0.00 138.61 212071486.86
2-A-2 0.00 0.00 94.00 147243000.00
3-A-1 0.00 0.00 380.25 490731499.01
3-A-2 0.00 0.00 264.68 350619000.00
4-A-1 0.00 0.00 541.64 108280941.31
4-A-2 0.00 0.00 0.00 108014000.00
5-A-1 0.00 0.00 189.15 153266588.39
5-A-2 0.00 0.00 530.23 469803000.00
5-A-3 0.00 0.00 0.00 200000000.00
6-A-1 0.00 0.00 461.26 313170473.96
6-A-2 0.00 0.00 698.52 490357000.00
6-A-3 0.00 0.00 0.00 200000000.00
7-A 0.00 0.00 22.66 33327507.15
8-A 0.00 0.00 21.49 55164757.68
M-1 0.00 0.00 162.20 127475376.40
M-2 0.00 0.00 135.66 106614637.64
M-3 0.00 0.00 76.68 60260404.40
M-4 0.00 0.00 38.34 30129214.20
B-1 0.00 0.00 26.54 20859750.77
B-2 0.00 0.00 14.74 11587323.28
B-3 0.00 0.00 17.70 13910820.47
R 0.00 0.00 0.00 0.00
TOTAL: 0 0 4161.53 4072901918
AMOUNTS PER $1,000 UNIT
Beginning Ending
Current PrincipaPrincipal Interest Current Prin.
Class Cusip Amount Distribution Distribution Amount
1-A-1 22540ANQ7 750.22290532 24.11257460 3.86887617 726.11033072
1-A-2 22540ANR5 1000.00000000 0.00000000 5.15696894 1000.00000000
2-A-1 22540ANS3 844.37898906 19.63775439 4.23264948 824.74123467
2-A-2 22540ANT1 1000.00000000 0.00000000 5.01273663 1000.00000000
3-A-1 22540ANU8 840.81679177 21.68177920 4.48264614 819.13501258
3-A-2 2254A0NV6 1000.00000000 0.00000000 5.33129947 1000.00000000
4-A-1 22540ANW4 710.58409345 23.12970129 4.10908184 687.45439217
4-A-2 100001523 1000.00000000 0.00000000 5.78752134 1000.00000000
5-A-1 22540ANY0 478.84795006 40.94341180 2.68437454 437.90453826
5-A-2 22540ANZ7 1000.00000000 0.00000000 5.60590171 1000.00000000
5-A-3 100001524 1000.00000000 0.00000000 5.60703035 1000.00000000
6-A-1 22540APB8 719.56113198 23.62674540 4.11676458 695.93438658
6-A-2 22540APC6 1000.00000000 0.00000000 5.72121589 1000.00000000
6-A-3 10001525 1000.00000000 0.00000000 5.72264040 1000.00000000
7-A 22540APE2 762.93470770 13.27757496 4.83747329 749.65713274
8-A 22540APF9 915.00653414 14.29860742 5.77778549 900.70792672
M-1 22540APJ1 988.97333119 0.96827473 5.44353937 988.00505646
M-2 22540APK8 988.97333123 0.96827475 5.44353928 988.00505648
M-3 22540APL6 988.97333109 0.96827469 5.44353932 988.00505640
M-4 22540APM4 988.97333137 0.96827480 5.44353927 988.00505657
B-1 100001526 988.97333160 0.96827452 5.44353953 988.00505707
B-2 100001527 988.97332964 0.96827507 5.44353939 988.00505457
B-3 100001528 988.97332994 0.96827450 5.44353918 988.00505544
R-1 22540APG7 0.00000000 0.00000000 0.00000000 0.00000000
R-2 22540APH5 0.00000000 0.00000000 0.00000000 0.00000000
SIGNATURES
Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this
report to be signed on its behalf by the undersigned
thereunto duly authorized.
WASHINGTON MUTUAL BANK, FA
MORTGAGE-BACKED PASS-THROUGH CERTIFICATES
SERIES 1999-WM1
By: /s/ Barbara Grosse
Name: Barbara Grosse
Title: Vice President
Bank One, NA
