The claim, repeatedly made in many publications, that – even worldwide – stock market prices would fall if the thirteenth day of the month were a Friday. Exact statistical measurements have clearly disproved this statement (it could be clearly demonstrated by exact statistical research that this is not the case). – See January effect, Halloween rule, calendar effect, Monday effect, sell-in-May effect, Friday, black, small-cap effect.
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University Professor Dr. Gerhard Merk, Dipl.rer.pol., Dipl.rer.oec.
Professor Dr. Eckehard Krah, Dipl.rer.pol.
E-mail address: info@ekrah.com
https://de.wikipedia.org/wiki/Gerhard_Ernst_Merk
https://www.jung-stilling-gesellschaft.de/merk/
https://www.gerhardmerk.de/