Are Stock Returns Predictable? A Test Using Markov Chains

Grant McQueen and Steven Thorley

Journal of Finance, 1991, vol. 46, issue 1, 239-63

Abstract: This paper uses a Markov chain model to test the random walk hypothesis of stock prices. Given a time series of returns, a Markov chain is defined by letting one state represent high returns and the other represent low returns. The random walk hypothesis restricts the transition probabilities of the Markov change to be equal irrespective of the prior years. Annual real returns are shown to exhibit significant nonrandom walk behavior in the sense that low (high) returns tend to follow runs of high (low) returns in the postwar period. Copyright 1991 by American Finance Association.

Date: 1991
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