$500 I Bond with 0.10% Fixed Rate Purchased March 2018

 Jan
1
Feb
1
Mar
1
Infla
tion
Rate
Com
posite
Rate
Apr
1
May
1
Jun
1
Jul
1
Aug
1
Sep
1
Infla
tion
Rate
Com
posite
Rate
Oct
1
Nov
1
Dec
1
2018 500.001.24%2.58%501.00502.20503.20504.20505.40506.401.11%2.32%507.40508.40509.402018
2019510.40511.20512.20

From $500.00 to $512.20 over 1.0 years = 2.43% average annual increase compounded semi-annually.

Generated  05/01/18  10:11