Historic Momentum Sell-Off in July 2026

The Goldman Sachs High-Beta Momentum Index has fallen 24% month-to-date through the first half of July, marking its worst performance since April 2009. The Morgan Stanley Tech Momentum Index recorded a 17-day rate of change of -35%, the worst reading in its entire 27-year history.

Why it matters: The post, shared on r/wallstreetbets by Stock Talk, highlights a broad and historically severe rotation out of momentum and tech stocks.