The Dow Jones industrial average jumped 222.44 points, or 1.3%, to 17,928.35. The Standard & Poor's 500 gained 25.70 points, or 1.3%, to 2,048.39. The Nasdaq composite index rose 59.67 points, or 1.3%, to 4,809.88.
Stocks overseas traded mostly higher after China's cabinet approved measures to boost exports as Beijing struggles to reduce gluts in many industries and reverse an export decline that threatens to cause job losses. The moves include more bank lending, greater tax rebates, and support for export credits.
Chinese exports contracted by 1.8% last month compared with the same period last year and are down 7.6% so far this year.
Asia markets were mixed in early trade Wednesday, following advances of more than 1 percent in major U.S. indexes due to weakness in the yen against the dollar and gains in oil prices.
The Nikkei 225 was up 1.37 percent, with many Japanese shares receiving a boost from a relatively weaker yen against the dollar. Across the Korean Strait, the Kospi was down 0.11 percent.
Reference: Belfasttelegraph, CNBC