I Bond Composite Rates

  Semi-annual Inflation Rates
Fixed
↓ Rates ↓
11175171116516111551511145141113513111251211115111110510110950911085081107507110650611055051104504110350311025021101501110050011995991198998
1.240.981.380.080.77-0.800.740.920.590.590.881.101.532.300.370.771.53-2.782.462.421.531.211.550.502.851.791.331.190.541.771.230.281.191.441.521.911.760.860.860.62
09 19983.405.925.396.213.564.971.774.915.274.604.605.195.646.518.084.154.976.510.008.408.326.515.866.554.429.207.046.115.824.507.005.903.975.826.336.497.286.985.155.154.66
11 19983.305.825.296.113.464.871.674.805.174.504.505.095.546.417.984.054.876.410.008.308.226.415.766.454.329.096.946.005.724.406.905.803.875.726.236.397.186.885.055.05
05 19993.305.825.296.113.464.871.674.805.174.504.505.095.546.417.984.054.876.410.008.308.226.415.766.454.329.096.946.005.724.406.905.803.875.726.236.397.186.885.05
11 19993.405.925.396.213.564.971.774.915.274.604.605.195.646.518.084.154.976.510.008.408.326.515.866.554.429.207.046.115.824.507.005.903.975.826.336.497.286.98
05 20003.606.125.606.413.765.171.975.115.474.804.805.395.846.728.284.355.176.720.008.618.536.726.066.764.629.407.246.316.024.707.206.104.176.026.536.697.49
11 20003.405.925.396.213.564.971.774.915.274.604.605.195.646.518.084.154.976.510.008.408.326.515.866.554.429.207.046.115.824.507.005.903.975.826.336.49
05 20013.005.524.995.803.164.561.384.504.874.204.204.795.236.117.673.754.566.110.007.997.916.115.466.154.028.796.635.705.424.106.595.503.575.425.92
11 20012.004.503.984.792.163.560.383.493.863.193.193.784.225.096.652.753.565.090.006.976.895.094.445.133.017.765.624.694.403.095.584.482.574.40
05 20022.004.503.984.792.163.560.383.493.863.193.193.784.225.096.652.753.565.090.006.976.895.094.445.133.017.765.624.694.403.095.584.482.57
11 20021.604.103.584.381.763.150.003.093.452.792.793.373.824.686.242.353.154.680.006.566.484.684.044.722.617.355.214.284.002.695.174.08
05 20031.103.593.073.881.262.650.002.592.952.292.292.873.314.185.731.842.654.180.006.055.974.183.534.222.116.834.703.773.492.194.66
11 20031.103.593.073.881.262.650.002.592.952.292.292.873.314.185.731.842.654.180.006.055.974.183.534.222.116.834.703.773.492.19
05 20041.003.492.973.771.162.550.002.492.852.192.192.773.214.085.621.742.554.080.005.945.864.083.434.122.016.734.603.673.39
11 20041.003.492.973.771.162.550.002.492.852.192.192.773.214.085.621.742.554.080.005.945.864.083.434.122.016.734.603.67
05 20051.203.693.173.981.362.750.002.693.052.392.392.973.414.285.831.942.754.280.006.156.074.283.634.322.216.934.80
11 20051.003.492.973.771.162.550.002.492.852.192.192.773.214.085.621.742.554.080.005.945.864.083.434.122.016.73
05 20061.403.903.374.181.562.950.002.893.252.592.593.173.624.486.032.152.954.480.006.356.274.483.844.522.41
11 20061.403.903.374.181.562.950.002.893.252.592.593.173.624.486.032.152.954.480.006.356.274.483.844.52
05 20071.303.803.274.081.462.850.002.793.152.492.493.073.514.385.932.042.854.380.006.256.174.383.74
11 20071.203.693.173.981.362.750.002.693.052.392.392.973.414.285.831.942.754.280.006.156.074.28
05 20080.002.481.962.760.161.540.001.481.841.181.181.762.203.064.600.741.543.060.004.924.84
11 20080.703.192.673.470.862.250.002.192.551.881.882.472.913.775.321.442.253.770.005.64
05 20090.102.582.062.860.261.640.001.581.941.281.281.862.303.164.700.841.643.160.00
11 20090.302.782.263.060.461.840.001.782.141.481.482.062.503.364.911.041.843.36
05 20100.202.682.162.960.361.740.001.682.041.381.381.962.403.264.800.941.74
11 20100.002.481.962.760.161.540.001.481.841.181.181.762.203.064.600.74
05 20110.002.481.962.760.161.540.001.481.841.181.181.762.203.064.60
11 20110.002.481.962.760.161.540.001.481.841.181.181.762.203.06
05 20120.002.481.962.760.161.540.001.481.841.181.181.762.20
11 20120.002.481.962.760.161.540.001.481.841.181.181.76
05 20130.002.481.962.760.161.540.001.481.841.181.18
11 20130.202.682.162.960.361.740.001.682.041.38
05 20140.102.582.062.860.261.640.001.581.94
11 20140.002.481.962.760.161.540.001.48
05 20150.002.481.962.760.161.540.00
11 20150.102.582.062.860.261.64
05 20160.102.582.062.860.26
11 20160.002.481.962.76
05 20170.002.481.96
11 20170.102.58

Each composite rate computed using fixed rate from the left and inflation rate from the top as follows:
composite rate = fixed rate + ( 2 X inflation rate ) + ( fixed rate X inflation rate )
Example Sep 1998 (top right): 0.0466 = 0.0340 + ( 2 X 0.0062 ) + ( 0.0340 X 0.0062 )

Generated  11/17/17  15:19