Fed chair Jerome Powell will deliver remarks at Jackson Hole on Friday. State Street's chief strategist lays out what investors should listen for.

The president's latest attack comes as Powell is scheduled to deliver remarks at the Fed's annual conference in Jackson Hole, WY, on Friday.

The highlight of the Kansas City Fed’s Jackson Hole central bank symposium is the Federal Reserve chair’s speech on Friday. This year, the U.S. economy faces economic and political cross-currents as Jerome Powell addresses the gathering for the last time as head of the central bank.