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Are investors moonstruck?: lunar phases and stock returns

By Kathy Yuan, Liu Zheng and Qiaoqiao Zhu

Abstract

This paper investigates the relation between lunar phases and stock market returns of 48 countries. The findings indicate that stock returns are lower on the days around a full moon than on the days around a new moon. The magnitude of the return difference is 3% to 5% per annum based on analyses of two global portfolios: one equal-weighted and the other value-weighted. The return difference is not due to changes in stock market volatility or trading volumes. The data show that the lunar effect is not explained away by announcements of macroeconomic indicators, nor is it driven by major global shocks. Moreover, the lunar effect is independent of other calendar-related anomalies such as the January effect, the day-of-week effect, the calendar month effect, and the holiday effect (including lunar holidays)

Topics: HB Economic Theory, HG Finance
Publisher: Elsevier
Year: 2006
DOI identifier: 10.1016/j.jempfin.2005.06.001
OAI identifier: oai:eprints.lse.ac.uk:39409
Provided by: LSE Research Online
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