The S&P 500 and the Nasdaq treaded water on Wednesday, as losses in tech heavyweights Apple and Nvidia limited broader gains and investor focus turned to the U.S. Federal Reserve's interest-rate decision,

The Nasdaq and other major indices declined following the Federal Reserve’s first meeting of the year, with the tech-heavy index falling 1.1% by the afternoon as investors digested the central bank’s cautious stance on interest rates.