Over 12½ years, ₹100 in the NIFTY 50 grew to ₹385. Miss just its 10 best days and it grew to ₹234. Those days arrived in the middle of the worst falls, which is exactly when people step aside. A system defined in advance, carried out automatically, keeps you in for them.
The honest version of our momentum backtest grew 12 times in 12½ years. Along the way it fell 49%, lost money in 4 years, and spent long stretches below its old high. That is where plans get abandoned.
We ran one momentum strategy three times and changed only the list of stocks it could buy. The usual shortcut made it look almost 13 times better than it really was.