The anticipated 2% price swing around Powell’s speech suggests slightly higher volatility than the average daily volatility of 1.52%, which is derived from the 30-day realized volatility of 29%.

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?

In a typical year, Jackson Hole sparks excitement mostly among market watchers. This time, the symposium feels more pivotal.