The Dow Jones index was flat after the Fed interest rate decision. Nvidia stock rallied on a price-target hike.

The Dow Jones Industrial Average rose 15.3% on March 13, 1933, which is the all-time one-day record. A similar increase today would push the Dow up 6,700 points. The S&P 500 has risen by almost that percentage in the past year.

Investors focus on the Fed's policy decision and Chair Jerome Powell's news conference. Earnings from Meta and Microsoft are due after the closing bell.