In this article, we develop a mean reversion strategy applied to a basket of stocks. The trading logic is straightforward: buy after short-term bearish moves and close the position when price returns toward an equilibrium level.The underlying assumption is that the U.S. equity market has displayed a long-term bullish bias for decades, supported by earnings growth, innovation, and economic expansion. This does not imply that prices move in a straight line, but rather that short-term phases of weakness often ...