#stocks #investing From start of 1928 thru end of 2019, 77 discrete (based on calendar yr) rolling 15 year holding periods for $SPX. 76 produced positive annualized returns.
Mean=10.66%
Median=10.39%
Top Quartile=14,36%
Bottom Quartile=7.13%
Max=18.8%
Min=-0.20%  (cont 1/3)