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): 19-Sep-00
Credit Suisse First Boston Mortgage Securities Corp. Mortgage Backed
Pass-Through Certificates, Series 99-WM3
(Exact name of registrant as specified in its charter)
Delaware 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 September 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 September 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 Report Dated: 19-Sep-00
Washington Mutual Bank, F.A.
Mortgage-Backed Pass-Through Certificates, Series 99-WM3
STATEMENT TO CERTIFICATEHOLDERS
Distribution Date: 19-Sep-00
DISTRIBUTION SUMMARY
Original Current Princip Principal Pass-Through
Class Face Value Amount Distribution Rate
1-A-1 661924000.00 610858691.60 4277552.23 7.0000%
1-A-2 28400000.00 28400000.00 0.00 7.0000%
1-A-3 174506000.00 174506000.00 0.00 7.0000%
1-A-4 101785000.00 101785000.00 0.00 7.0000%
1-A-P 349878.20 331741.94 386.99 NA
2-A-1 100000000.00 88102696.56 1607902.99 7.5000%
2-A-2 100400000.00 89597087.13 1459997.72 7.5000%
2-A-3 17580000.00 17580000.00 0.00 7.5000%
2-A-4 23592000.00 23592000.00 0.00 7.5000%
2-A-5 28497000.00 28497000.00 0.00 7.5000%
2-A-P 202701.41 178705.87 172.66 NA
1-M-1 34607000.00 34368700.66 31025.67 7.0000%
1-M-2 6107000.00 6064948.00 5475.01 7.0000%
1-M-3 3562000.00 3537472.52 3193.38 7.0000%
2-M-1 9673000.00 9610584.63 8115.64 7.5000%
2-M-2 1707000.00 1695985.53 1432.17 7.5000%
2-M-3 996000.00 989573.26 835.64 7.5000%
1-B-1 2036000.00 2021980.35 1825.30 7.0000%
1-B-2 2036000.00 2021980.35 1825.30 7.0000%
2-B-1 569000.00 565328.51 477.39 7.5000%
2-B-2 569000.00 565328.51 477.39 7.5000%
B-3 3256278.33 3234164.41 2878.38 7.1093%
R-1 100.00 0.00 0.00 7.0000%
R-2 100.00 0.00 0.00 7.0000%
TOTAL 1302355057.94 1228104969.83 7403573.86 0
Interest Realized Loss o Interest
Class Distributed (1 Principal Shortfall
1-A-1 3562987.78 0.00 0.00
1-A-2 165650.18 0.00 0.00
1-A-3 1017850.37 0.00 0.00
1-A-4 593686.75 0.00 0.00
1-A-P NA 0.00NA
2-A-1 550535.78 0.00 0.00
2-A-2 559873.92 0.00 0.00
2-A-3 109853.84 0.00 0.00
2-A-4 147421.60 0.00 0.00
2-A-5 178071.94 0.00 0.00
2-A-P NA 0.00NA
1-M-1 200464.14 0.00 0.00
1-M-2 35375.34 0.00 0.00
1-M-3 20633.21 0.00 0.00
2-M-1 60054.58 0.00 0.00
2-M-2 10597.87 0.00 0.00
2-M-3 6183.64 0.00 0.00
1-B-1 11793.72 0.00 0.00
1-B-2 11793.72 0.00 0.00
2-B-1 3532.62 0.00 0.00
2-B-2 3532.62 0.00 0.00
B-3 19158.18 0.00 0.00
R-1 0.03 0.00 0.00
R-2 0.00 0.00 0.00
TOTAL 7269051.83 0.00 0.00
Prepay InteresCurrent Principal
Class Shortfall Amount
1-A-1 354.59 606581139.37
1-A-2 16.49 28400000.00
1-A-3 101.30 174506000.00
1-A-4 59.08 101785000.00
1-A-P NA 331354.95
2-A-1 106.07 86494793.57
2-A-2 107.87 88137089.41
2-A-3 21.16 17580000.00
2-A-4 28.40 23592000.00
2-A-5 34.31 28497000.00
2-A-P NA 178533.21
1-M-1 19.95 34337674.99
1-M-2 3.52 6059472.99
1-M-3 2.05 3534279.14
2-M-1 11.57 9602468.99
2-M-2 2.04 1694553.36
2-M-3 1.19 988737.62
1-B-1 1.17 2020155.05
1-B-2 1.17 2020155.05
2-B-1 0.68 564851.12
2-B-2 0.68 564851.12
B-3 2.33 3231286.03
R-1 0.00 0.00
R-2 0.00 0.00
TOTAL 875.62 1220701395.97
(1) Interest Distribution includes Reimbursement of Realized Losses,
and is net of allocated PPIS
AMOUNTS PER $1,000 UNIT
Beginning
Current Princip Principal
Class Cusip Amount Distribution
1-A-1 22540APZ5 922.85321517 6.46230116
1-A-2 22540AQA9 1000.00000000 0.00000000
1-A-3 22540AQB7 1000.00000000 0.00000000
1-A-4 22540AQC5 1000.00000000 0.00000000
1-A-P 22540AQD3 948.16407538 1.10607063
2-A-1 22540AQH4 881.02696560 16.07902990
2-A-2 22540AQJ0 892.40126624 14.54180996
2-A-3 22540AQK7 1000.00000000 0.00000000
2-A-4 22540AQL5 1000.00000000 0.00000000
2-A-5 22540AQM3 1000.00000000 0.00000000
2-A-P 22540AQN1 881.62124773 0.85179477
1-M-1 22540AQE1 993.11412893 0.89651429
1-M-2 22540AQF8 993.11413132 0.89651384
1-M-3 22540AQG6 993.11412690 0.89651319
2-M-1 22540AQR2 993.54746511 0.83899928
2-M-2 22540AQS0 993.54746924 0.83899824
2-M-3 22540AQT8 993.54744980 0.83899598
1-B-1 N/A 993.11412083 0.89651277
1-B-2 N/A 993.11412083 0.89651277
2-B-1 N/A 993.54746924 0.83899824
2-B-2 N/A 993.54746924 0.83899824
B-3 N/A 993.20883605 0.88394778
R-1 22540AQP6 0.00000000 0.00000000
R-2 22540AQQ4 0.00000000 0.00000000
Ending
Interest Current Principal
Class Distribution Amount
1-A-1 5.38277473 916.39091402
1-A-2 5.83275282 1000.00000000
1-A-3 5.83275286 1000.00000000
1-A-4 5.83275286 1000.00000000
1-A-P NA 947.05800476
2-A-1 5.50535780 864.94793570
2-A-2 5.57643347 877.85945627
2-A-3 6.24879636 1000.00000000
2-A-4 6.24879620 1000.00000000
2-A-5 6.24879601 1000.00000000
2-A-P NA 880.76945296
1-M-1 5.79258936 992.21761464
1-M-2 5.79258883 992.21761749
1-M-3 5.79259124 992.21761370
2-M-1 6.20847514 992.70846583
2-M-2 6.20847686 992.70847100
2-M-3 6.20847390 992.70845382
1-B-1 5.79259332 992.21760806
1-B-2 5.79259332 992.21760806
2-B-1 6.20847100 992.70847100
2-B-2 6.20847100 992.70847100
B-3 5.88345899 992.32488827
R-1 0.30000000 0.00000000
R-2 0.00000000 0.00000000
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.
Credit Suisse First Boston
Mortgage Securities Corp.
By: /s/ Barbara Grosse
--------------------------
Name: Barbara Grosse
Title: Assistant Vice President
Dated: September 30, 2000
