Seasonal Fluctuations in Industrial Production and Stock Market Seasonals

Abstract
February and August peaks in the growth rates of the seasonally unadjusted Industrial Production Index follow the stock market peaks documented by Rozeff and Kinney (1976) by one month. Coefficients on one-month lead growth rates in industrial production for small firms are positive and significant in time-series regressions even in the presence of the market factor. Moreover, whereas returns on large firms' stocks unidirectionally Granger cause (i.e., predict) future growth rates in industrial production at least six months in advance, returns on small firms' stocks reflect one-month lead as well as past growth rates in industrial production. For these reasons, we argue that seasonal real growth provides a partial explanation for the January stock seasonal among small firms.

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