Like clockwork, the major indexes lost steam just before 3 p.m. ET.

The S&P 500 was down 0.1%. The Dow was down 32 points, or 0.1%. The Nasdaq Composite was flat.

Throughout Powell's tenure as Fed Chair, the stock market has trended higher between 2 p.m. ET and 3 p.m. ET on Fed days before falling in the final hour of trading.