Every quarter we re-screen the entire U.S. mid-to-mega-cap universe for cointegrated stock pairs and keep the fifty that earned their place across a full five-year window. The September 2026 vintage of our Top 50 USA Stock Pair Stars is live in PairTrade Finder® Ultimate Alpha 3 today. This post explains how 34,500 candidate pairs became 50, what the fifty did in the backtest, and — because a backtest is only half a story — what the backtest cannot tell you.
Hypothetical backtest results — not live trading, not out-of-sample Every figure in this post comes from backtested signals over the same period in which these pairs were selected. … Read More →




Five-year backtest, identical settings: the three textbook pairs all lost; HGV/MGM went nine for nine.




Why Many Pairs Fail in Live Trading (Even If They Pass Backtests)

