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1-3/4% 20-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2028

Ref CPI and Index Ratios for September 2008

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            TIPS of January 2028
    CUSIP NUMBER:                           912810PV4
    DATED DATE:                             January 15, 2008
    ORIGINAL ISSUE DATE:                    January 31, 2008
    ADDITIONAL ISSUE DATE:                  July 31, 2008
    MATURITY DATE:                          January 15, 2028
    Ref CPI on DATED DATE:                  209.49645
    TABLE FOR MONTH OF:                     September 2008
    NUMBER OF DAYS IN MONTH:                30

    CPI-U (NSA) May 2008                    216.632
    CPI-U (NSA) June 2008                   218.815
    CPI-U (NSA) July 2008                   219.964

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    September      1       2008    218.81500       1.04448
    September      2       2008    218.85330       1.04466
    September      3       2008    218.89160       1.04485
    September      4       2008    218.92990       1.04503
    September      5       2008    218.96820       1.04521
    September      6       2008    219.00650       1.04539
    September      7       2008    219.04480       1.04558
    September      8       2008    219.08310       1.04576
    September      9       2008    219.12140       1.04594
    September      10      2008    219.15970       1.04613
    September      11      2008    219.19800       1.04631
    September      12      2008    219.23630       1.04649
    September      13      2008    219.27460       1.04667
    September      14      2008    219.31290       1.04686
    September      15      2008    219.35120       1.04704
    September      16      2008    219.38950       1.04722
    September      17      2008    219.42780       1.04741
    September      18      2008    219.46610       1.04759
    September      19      2008    219.50440       1.04777
    September      20      2008    219.54270       1.04795
    September      21      2008    219.58100       1.04814
    September      22      2008    219.61930       1.04832
    September      23      2008    219.65760       1.04850
    September      24      2008    219.69590       1.04869
    September      25      2008    219.73420       1.04887
    September      26      2008    219.77250       1.04905
    September      27      2008    219.81080       1.04923
    September      28      2008    219.84910       1.04942
    September      29      2008    219.88740       1.04960
    September      30      2008    219.92570       1.04978