Are investors moonstruck? Further international evidence on lunar phases and stock returns

This study uses an alternative model specification to re-examine the influences of the new moon and the full moon on the daily returns of 62 international stock indices for the period 1988 to 2008. The fixed effects panel model incorporates the prior day effect and two calendar anomalies, i.e., the Monday effect and the turn-of-the-month effect, to assess variations in the lunar influences. A covariate, based on per capita gross domestic product (GDP), examines how the results vary between countries. The prior day effect is greater for less developed countries. The overall enhanced new moon effect is independent of GDP. An overall full moon effect is absent. These lunar effects are weakly influenced by the calendar anomalies.