The stock market is heading into a catalyst-filled week as Fed Chair Jerome Powell gets ready to speak at Jackson Hole and big retailers report earnings.

Gold prices edged lower on Tuesday as the U.S. dollar firmed, while investors hunkered down for Federal Reserve Chair Jerome Powell's speech at Jackson Hole later this week.

Jay Powell’s speech at the Federal Reserve’s August summit in Jackson Hole, Wyoming, is always a high-stakes moment. This year, the central bank’s chair takes the podium under fire — facing fierce attacks from Donald Trump and a growing insurgency within his own institution.

The Nasdaq fell as megacaps lost, after having rallied for much of the year. Nvidia fell 3.5%, the biggest drop in nearly four months.

The U.S. dollar was little changed on Wednesday as traders awaited a speech from Federal Reserve Chair Jerome Powell at the annual Jackson Hole symposium later this week for clues on the monetary policy path.

Federal Reserve Chair Jerome Powell's upcoming speech at the Jackson Hole Economic Policy Symposium on Friday is being billed as a pivotal, "make-or-break" moment for the central bank's more dovish contingent.