US stock futures wavered just above the flatline as Wall Street readied for the main event of the week: Federal Reserve Chair Jerome Powell's speech at the Jackson Hole symposium in Wyoming.

Futures for the Dow Jones Industrial Average and other major stock indexes traded higher Friday as Wall Street braced for a critical monetary policy speech from Federal Reserve Chairman Jerome Powell. Meanwhile, Nvidia NVDA fell on the stock market today after reportedly asking suppliers to stop work on its H20 artificial intelligence chip.

Follow along to what could be a pivotal day in markets with all eyes trained on Jackson Hole, Wyo.

U.S. stock futures rose on Friday following Thursday's declines. Futures of major benchmark indices were higher.

The U.S. market is top-heavy, with Nvidia occupying a bigger weight than any company in modern history. Risks abound, our columnist says.

Follow all the latest U.S. market action for Thursday here to see if stocks can shrug off their latest rotation-based wobble as investors eye Walmart earnings and continue to eye Fed Chair Powell's speech on Friday.

The Nasdaq Composite extended its slide on Tuesday–and even the Dow Jones Industrial Average was struggling after hitting an intraday record this morning. The tech-heavy index was down 1.5%, while the Dow was down 90 points,