Federal Reserve Chair Jerome Powell is set to address an annual gathering of central bankers and economics bigwigs at a mountain resort in Jackson Hole, Wyo., Friday. Here's what you need to know: What exactly is the Jackson Hole Economic Policy Symposium?

Gold prices fell on Thursday, pressured by a firmer dollar, while investors looked to the U.S. central bank's annual Jackson Hole symposium later in the day for further policy cues.