Markets took Jerome Powell's Jackson Hole speech as a sign the Fed could cut rates at its September 16-17 meeting. SPY and QQQ ETFs rose 1.54% each, while CME FedWatch now pegs a 87% chance of a 25 bps cut. A Stocktwits poll showed 55% expect a 25 bps cut, 26% see 50 bps, and 19% expect no change.