The Dow Jones index wavered ahead of the Fed interest rate decision. Nvidia stock rallied on a price-target hike.

The Dow, S&P 500, and Nasdaq are rising as the stock market focuses on the Federal Reserve's coming interest-rate decision.

It's decision day at the Federal Reserve, but as the social-media post above from Bespoke Investment Group shows, it's what Chair Jerome Powell has to say at his afternoon news conference that tends ...