$1,000 I Bond with 0.20% Fixed Rate Purchased October 2010

 Jan
1
Feb
1
Mar
1
Apr
1
Infla
tion
Rate
Com
posite
Rate
May
1
Jun
1
Jul
1
Aug
1
Sep
1
Oct
1
Infla
tion
Rate
Com
posite
Rate
Nov
1
Dec
1
2010 1,000.000.77%1.74%1,001.601,002.802010
20111,004.401,005.601,007.201,008.800.37%0.94%1,009.601,010.401,011.201,012.001,012.801,013.602.30%4.80%1,017.601,021.602011
20121,025.601,029.601,034.001,038.001.53%3.26%1,040.801,043.601,046.401,049.201,052.001,054.801.10%2.40%1,056.801,059.202012
20131,061.201,063.201,065.201,067.600.88%1.96%1,069.201,071.201,072.801,074.401,076.401,078.000.59%1.38%1,079.201,080.402013
20141,081.601,082.801,084.001,085.600.59%1.38%1,086.801,088.001,089.201,090.401,092.001,093.200.92%2.04%1,095.201,096.802014
20151,098.801,100.801,102.401,104.400.74%1.68%1,106.001,107.601,109.201,110.401,112.001,113.60-0.80%0.00%1,113.601,113.602015
20161,113.601,113.601,113.601,113.600.77%1.74%1,115.201,116.801,118.401,120.001,121.601,123.200.08%0.36%1,123.601,124.002016
20171,124.401,124.401,124.801,125.201.38%2.96%1,128.001,130.801,133.601,136.401,139.201,142.000.98%2.16%1,144.001,146.002017
20181,148.001,150.401,152.401,154.401.24%2.68%1,156.801,159.601,162.001,164.801,167.201,170.001.11%2.42%1,172.401,174.802018
20191,177.201,179.601,181.601,184.001.16%2.52%1,186.401,188.801,191.601,194.001,196.401,198.800.70%1.60%1,200.401,202.002019
20201,203.601,205.201,206.801,208.401.01%2.22%1,210.801,212.801,215.201,217.201,219.601,222.000.53%1.26%1,223.201,224.402020
20211,226.001,227.201,228.401,229.600.84%1.88%1,231.601,233.601,235.201,237.201,239.201,241.20

From $1,000.00 to $1,241.20 over 11.0 years = 1.97% average annual increase compounded semi-annually.

Generated  11/02/20  10:30