Hedging the Time-Varying Risk Exposures of Momentum Returns

Abstract

Momentum returns have time-varying exposures to the three Fama and French equity risk factors. In particular factor loadings are higher when the factor returns during the ranking period are higher. In this study we look at momentum returns after hedging the time-varying exposures to the Fama and French factors. We find that specifically taking into account the conditional nature of the time-variation in factor loadings is the best way to hedge. The hedged momentum returns are higher, less risky, more stable over time and vary less over different market conditions. Determining momentum betas based on estimated individual stock betas leads to large systematic biases and hence is less effective in hedging.