The tech-heavy index dropped 1.5%, Dow down 0.2%, and S&P 500 down 0.7%. Despite this, 315 S&P stocks are on track to close higher. Analyst Jonathan Krinsky notes that factor unwinds, like high beta momentum and retail favorites, are causing major indices to weaken significantly, with the worst performance since April.

Read more at Dow Jones & Company: What’s Really Happening in the Stock Market Today