The full moon was discussed many years ago on this site by Mr. McDonnell with respect to markets with results "consistent with randomness". It would seem though that the day(s) after a full moon and particularly near the end of a difficult week might cause some sleep deficit effects to show in sensitive individuals–but perhaps extra coffee is used to counter such things.

"Blame Bad night's Sleep on the Moon":

Malcom von Schantz, a sleep and circadian researcher at the University of Surrey in the U.K., called the new findings "fascinating" because they run counter to the results of several other studies that failed to find a link between the moon and human behavior.

"Essentially, every report published to date has failed to show significant associations between the phase of the moon and any number of behavioral and physiological parameters," von Schantz, who was not involved in the study, said in an email."This is the very first report that suggests an association with one behavior, sleep, and of course it's a behavior that in our species normally occurs at night."

"Evidence That the Lunar Cycle Influences Human Sleep":

We found that around full moon, electroencephalogram (EEG) delta activity during NREM sleep, an indicator of deep sleep, decreased by 30%, time to fall asleep increased by 5 min, and EEG-assessed total sleep duration was reduced by 20 min. These changes were associated with a decrease in subjective sleep quality and diminished endogenous melatonin levels. This is the first reliable evidence that a lunar rhythm can modulate sleep structure in humans when measured under the highly controlled conditions of a circadian laboratory study protocol without time cues.





Speak your mind

2 Comments so far

  1. Ethan Wang on July 26, 2013 11:18 am

    This theory worked pretty well until this yr! we have 6 sigma outliner! Every day is a up day!

  2. Craig Bowles on July 26, 2013 6:24 pm

    A lot of people don’t sleep much around full moons. Apparently, a lot of horses don’t either as you often see the favorite die in the stretch around full moons. National Geographic pointed out the increase of lion attacks just after full moons. Any policeman will tell you that they dread that time of the month.

    The study I read on stock markets found the two weeks around full moons are negative when compared to two weeks around new moons. I don’t really see that but turning points in stocks and commodities often occur on a full or new moon.

    If you expect the next 4-month cycle low in October, the full moon on Oct 18th or the new on Nov 4th might have you on heightened alert.


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