Earnings Already Telling the Tale of Lower GDP By: CNBC.com News July 26, 2012 at 21:08 PM EDT Second quarter GDP Friday could be a game changer for markets that are anxious for any clues as to the depth and duration of the current soft patch. Read More >> Related Stocks: Amazon.com Barclays Plc ADR Eldorado Gold Corporation Facebook Groupon Cl A Legg Mason Newmont Mining Starbucks Corp Zynga Inc Cl A