Stocks logged modest gains in lower volume Wednesday as the market digested some high-profile earnings reports. The Dow Jones industrial average -- helped by Big Blue's big gain -- led the averages with a 0.5% gain. The Nasdaq rose 0.3% and the S&P 500 added 0.1%. Volume dipped on both major exchanges, according to preliminary data. Dow component IBM (IBM) shot up 4% in triple-paced trade after the tech services provider posted a 14% increase in