Looking for a safe and low-cost investment that protects your savings from inflation for up to 30 years and pays about 4% more than bank savings accounts? If so, check out the U.S. Treasury Department's I Bond. I Bonds are a relatively new type of U.S. savings bond that provide inflation protection. First introduced in 1998, they are sold at face value (e.g., $50 for a $50 I bond) and provide inflation-protected earnings for up to 30 years. Earnings are exempt from state and local taxes. Search This Site: