US equity futures dropped, extending the recent selloff into its fifth day, as traders stayed guarded ahead of the Federal Reserve’s gathering at Jackson Hole. As of 8:00 am, S&P 500 futures fell 0.2%, while Nasdaq 100 futures were flat after a two-day selloff that erased 2% off the index. In premarket trading, Nvidia rose 0.8% while most Magnificent Seven peers posted losses. Retail giant Walmart brought Q2 earnings season to an unofficial close after reporting an EPS miss (68c vs exp. 74c...