I had never heard about those stock market statistics, very interesting. Of course since usually the media presents statistics without error bars or statistical tests, I googled it and apparently Years 1, 2 and 4 are not significantly different than the 4 year average, only Year 3 is statistically significantly different. https://www.wsj.com/articles/the-truth-behind-the-presidential-cycle-for-stocks-1509720377