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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for October 2005

Contact: Office of Financing      202-504-3550
DESCRIPTION:                            Series A-2010
CUSIP NUMBER:                           9128275W8
DATED DATE:                             January 15, 2000
ORIGINAL ISSUE DATE:                    January 18, 2000
ADDITIONAL ISSUE DATE:                  July 17, 2000
MATURITY DATE:                          January 15, 2010
Ref CPI on DATED DATE:                  168.24516
TABLE FOR MONTH OF:                     October 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) June 2005                   194.5
CPI-U (NSA) July 2005                   195.4
CPI-U (NSA) August 2005                 196.4

Month   Calendar Day    Year    Ref CPI      Index Ratio

October        1       2005    195.40000       1.16140
October        2       2005    195.43226       1.16159
October        3       2005    195.46452       1.16178
October        4       2005    195.49677       1.16198
October        5       2005    195.52903       1.16217
October        6       2005    195.56129       1.16236
October        7       2005    195.59355       1.16255
October        8       2005    195.62581       1.16274
October        9       2005    195.65806       1.16293
October        10      2005    195.69032       1.16313
October        11      2005    195.72258       1.16332
October        12      2005    195.75484       1.16351
October        13      2005    195.78710       1.16370
October        14      2005    195.81935       1.16389
October        15      2005    195.85161       1.16408
October        16      2005    195.88387       1.16428
October        17      2005    195.91613       1.16447
October        18      2005    195.94839       1.16466
October        19      2005    195.98065       1.16485
October        20      2005    196.01290       1.16504
October        21      2005    196.04516       1.16524
October        22      2005    196.07742       1.16543
October        23      2005    196.10968       1.16562
October        24      2005    196.14194       1.16581
October        25      2005    196.17419       1.16600
October        26      2005    196.20645       1.16619
October        27      2005    196.23871       1.16639
October        28      2005    196.27097       1.16658
October        29      2005    196.30323       1.16677
October        30      2005    196.33548       1.16696
October        31      2005    196.36774       1.16715