US stock futures traded flat as Wall Street digested mixed messages from the Federal Reserve in the wake of its decision to hold interest rates steady.

Investors reacted to the Federal Reserve's decision to leave rates unchanged, by handing the S&P 500 its biggest percentage gain for a Fed day since last July. The Nasdaq Composite had its best Fed day since Nov.

Stocks are falling in morning trading and Wall Street is on track for its fifth straight weekly loss. The S&P 500 was down 0.8% Friday.

U.S. stocks are drifting higher following signals that the U.S. economy remains solid, for the moment at least.

U.S. stocks are drifting higher Wednesday as Wall Street waits to hear what the Federal Reserve will say in the afternoon about where interest rates may be heading. The S&P 500 was up 0.3% in early trading.