Bonds issued by the United States Treasury that earn a fixed interest rate plus the rate of inflation. These bonds are sold at face value in denominations of $50 up to $5000 and may earn interest for up to 30 years. These bonds may be liquidated at any time after they have been in force for at least six months, but if liquidation occurs during the first five years, three months of interest must be forfeited. The interest earned is compounded twice a year and paid when the bond is redeemed. Protection against loss of principal and purchasing power while accumulating tax-deferred interest are some of the advantages of this Treasury-backed issue.