Stocks ended a bumpy day mostly lower Wednesday despite assurances from the Federal Reserve that it would keep interest rates low through 2022 and would continue buying bonds to help markets function smoothly.
The S&P 500 fell 0.5%, extending its losses from a day earlier. Most sectors finished lower, but gains from several big technology companies helped push the Nasdaq above 10,000 for the first time.
Bond yields fell, a sign that investors remained cautious.
The S&P 500 dropped 17.04 points, or 0.5%, to 3,190.14.