Why Do Markets Move Together? An Investigation of U.S.-Japan Stock Return Comovements

G. Karolyi and René Stulz

Journal of Finance, 1996, vol. 51, issue 3, 951-86

Abstract: This article explores the fundamental factors that affect cross-country stock return correlations. Using transactions data from 1988 to 1992, the authors construct overnight and intraday returns for a portfolio of Japanese stocks using their NYSE-traded American depository receipts and a matched-sample portfolio of U.S. stocks. They find that U.S. macroeconomic announcements, shocks to the yen/dollar foreign exchange rate and Treasury bill returns, and industry effects have no measurable influence on U.S. and Japanese return correlations. However, large shocks to broad-based market indices (Nikkei Stock Average and Standard and Poor's 500 Stock Index) positively impact both the magnitude and persistence of the return correlations. Copyright 1996 by American Finance Association.

Date: 1996
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