Nasdaq futures tank 200 points: 5 things to know before Wall Street opens

US stock futures edged lower on Monday as Wall Street entered one of August's most consequential weeks, with Nvidia earnings, new sanctions on Iran and Federal Reserve Chair Kevin Warsh's Jackson Hole address all capable of resetting market sentiment. Nasdaq 100 futures fell about 0.6%, while S&P 500 futures slipped roughly 0.2% and Dow futures hovered around flat in early trading.