Hypomaster - "I think there's a reason why full moon days tend...

Hypomaster - "I think there's a reason why full moon days tend to have falls on the stock market. Full moon probably causes the mind to cool and irrational exuberance to fade, therefore stock prices fall as a result. Let me share with you an excerpt from a book, "Don’t Let Yourself Be Upset by the Sutra rather Upset the Sutra Yourself, Ch 1".

Or it could be that the fullmoon usually falls towards the end of the last trading week of the month, where professional guys tend to lock in profits and go into cash for a monthly binge in some resort somewhere with about 14 lanky Mongolian models.