Evidence on the existence of common stock inflation hedges

Previous researchers have been unable to identify (on an ex ante basis) inflation hedge portfolios consisting of common stocks. This study demonstrates a procedure for forming common stock portfolios that offer returns that vary positively with unexpected inflation. The strategy could have been used to hedge against purchasing power risk during the 1974–1979 period. In addition to its practical value, the research has important implications for capital asset pricing theory since the existence of hedge portfolios is a necessary condition for the superiority of the multi‐period CAPM over the single‐period models.