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Common trends and common cycles in stock markets
journal contributionposted on 2013-09-01, 00:00 authored by Paresh Narayan, Kannan ThuraisamyKannan Thuraisamy
In this paper we examine the role of permanent and transitory shocks in explaining variations in the S&P 500, Dow Jones and the NASDAQ. Our modeling technique involves imposing both common trend and common cycle restrictions in extracting the variance decomposition of shocks. We find that: (1) the three stock price indices are characterized by a common trend and common cycle relationship; and (2) permanent shocks explain the bulk of the variations in stock prices over short horizons.