NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Ex-Day Behavior of Japanese Stock Prices: New Insights from New Methodology

Fumio Hayashi, Ravi Jagannathan

NBER Working Paper No. 3421
Issued in August 1990
NBER Program(s):   PE

We study the ex-dividend day behavior of Japanese stock prices for the period 1983-87. We find that, contrary to previous findings, prices of ex-day stocks drop by nearly the full amount of the dividend. However, ex-day stocks shows an abnormal return. Also, for the many ex-dividend day stocks that also go ex-rights on the same ex-day, we find that the return is on average higher than that for stocks without rights issues. We thus conclude that the ex-day behavior of Japanese stocks are qualitatively similar to that of U. S. stocks.

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Document Object Identifier (DOI): 10.3386/w3421

Published: Journal of the Japanese and International Economies, 4(3): 401-427, December 1990. citation courtesy of

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