The US Federal Reserve's two-day meeting and a widely-anticipated interest rate increase will form the key driver in the coming days as investors eye clues about the projected pace of future hikes. "If...(policymakers) came out saying that over the next two years they will raise by 'this' much, that would be very destabilizing," Brian Battle, director of trading at Performance Trust Capital Partners in Chicago, told Reuters. "The market will take great relief in the Fed communicating it will be very patient for the next increase."