what do the I and EE mean in I Bonds and EE Bonds (Also found in california tax systems)?

Question

what is CASDI/ EE?

Answer 1

If you are talking about US Savings Bonds, the EE bonds are the old-style flat interest bonds. The "I" bonds are adjustible rate bonds the changes interest every 6 months (May & November) and in indexed (thus the "I") to the treasury rates.

I think it is 85% of the 6 month note rate. For example, if the 6 month note is yielding 4% the I bond will yield 3.4% for 6 months.

For more info, see below.