NEW YORK (Reuters) - The S&P 500 and Nasdaq rose to record closing highs on Wednesday as optimism that China would take more measures to prop up its economy eased concerns about the economic impact of the coronavirus epidemic. The Dow Jones Industrial Average .DJI rose 115.5 points, or 0.4%, to 29,347.69, the S&P 500 .SPX gained 15.81 points, or 0.47%, to 3,386.1 and the Nasdaq Composite .IXIC added 84.44 points, or 0.87%, to 9,817.18.