All tests

Every belief we have tested, newest first. Each one has its rule, its numbers and its verdict.

1. Test 002MythDoes the full moon affect the stock market? We tested 14 indices since 2004A famous 2006 study found weaker stock markets around the full moon. In 14 indices since 2004 the gap is small, it flipped after 2014, and luck explains it.15 Oct 2026 · Calendar effects · 14 stock indices
2. Test 001Half trueSell in May and go away? Summers really are weaker, but selling left you with less than half the moneySummers really are weaker, in the US and most markets abroad. Selling every May still left you with less than half the money.15 Oct 2026 · Seasonality · S&P 500