This month, we're reaching out to millions of investors to help guide them in their quest toward financial knowledge and independence . Series I bonds, on the other hand, pay an interest rate that changes every six months based on moves in the price-tracking Consumer Price Index, a measure of inflation. The current rate of 0.6% is less than you can get even from some bank savings accounts, with Discover Financial ( DFS ) and Sallie Mae (Nasdaq: SLM) offering 0.8% and 1% respectively.