Standard & Poor's 500 jumped 0.79 per cent to 1,428.39. The Dow Jones Industrial Average skyrocketed 1.02 per cent to 13,245.68. The Nasdaq Composite advanced 0.41% per cent, or 12.27 points, to 3,011.93.
"People are believing that there is such an element of surprise that however this turns out, you're going to get a big reaction because some people are going to be baffled [by the result]," said Art Cashin, director of floor operations at UBS Financial Services.