The Bogleheads' Guide to Investing

TIPS-guaranteed rates are usually higher than I Bond fixed rates. Therefore, if you have room for them in your tax-deferred account, that’s where they should go, because you’d get tax-deferred inflation protection without risking principal. This assumes that you purchase them at auction and hold them to maturity. If you buy or sell TIPS in the secondary market, you may get back more or less than you paid.