CSX Corporation (NASDAQ:CSX) shares are up after the company reported its second-quarter financial results Monday. Here's a look at the details from the report.  The Details: CSX reported quarterly earnings of 49 cents per share on revenue of $3.7 billion, slightly below the analyst consensus estimate of $3.702 billion. The company said the positive effects of merchandise pricing gains and growth in intermodal and merchandise volume were offset by declines in export coal ...