The way that TIPs work is that the principal amount (on which the annual interest payments are based) is adjusted each year for inflation as measured by the Consumer Price Index. Doing this properly requires multiplying the principal amount by the ratio of the "new" CPI value to the CPI value at the time when the TIPs were issued. Therefore, it provides inflation protection (at least before taxes) that is as good as the CPI measurement.
Rather than base your financial decisions on what you read in this forum (or -- even worse -- what some broker tells you) check it out at the Treasury web site at
http://www.publicdebt.treas.gov/sec/seciis.htm
IMO, the greatest long-term "risk" associated with TIPs is that, in the future as it becomes necessary to reinvest in new TIPs, the interest rate (i.e., the premium over the inflation rate) may decline. Since this rate is determined by the market, that would be caused by TIPs becoming more popular (especially among retirees) as I think they should!
Rather than base your financial decisions on what you read in this forum (or -- even worse -- what some broker tells you) check it out at the Treasury web site at
http://www.publicdebt.treas.gov/sec/seciis.htm
IMO, the greatest long-term "risk" associated with TIPs is that, in the future as it becomes necessary to reinvest in new TIPs, the interest rate (i.e., the premium over the inflation rate) may decline. Since this rate is determined by the market, that would be caused by TIPs becoming more popular (especially among retirees) as I think they should!