U.S equity future edged higher in early Wednesday trading, while the dollar extended gains and Treasury yields dipped, as investors looked for clarity on two key issues from today's Federal Reserve rate decision and fourth quarter earnings updates from three megacap tech giants.

Futures tied to the Nasdaq gained on Wednesday as semiconductor-related stocks rose after chip equipment maker ASML's quarterly orders topped estimates, with focus also on a raft of company results and the Federal Reserve's rate verdict later in the day.

Anxiety over a Chinese startup's threat to American artificial intelligence dominance eased somewhat Wednesday as focus turned to the Federal Reserve’s rate decision due later in the day. Futures for the S&P 500 and the Dow Jones Industrial Average both shifted between small gains and losses before the bell.