Wall Street futures surge ahead of Fed decision: 5 things to know before markets open

US equity futures edged higher ahead of a pivotal Federal Reserve decision, with S&P 500 futures up about 0.15% and Nasdaq 100 futures gaining 0.3%, while Dow futures were little changed. Easing oil prices offered some relief after Wall Street recorded two consecutive declines, but positioning remained cautious ahead of the Fed's policy outcome.