Earnings reports ruled the stock market again Thursday, with heavy hitters such as McDonald’s (MCD), eBay (EBAY) and Southwest Airlines (LUV) scoring big gains on upside surprises. The Dow Jones industrial average led with a 1.9% jump, while the S&P 500 and Nasdaq each rallied nearly 1.7% in the stock market today. Volume ran sharply higher across the board, according to preliminary data.