A large Spanish bank has won the bidding for Austin-based Guaranty Financial Group, according to the Wall Street Journal and Bloomberg News. Federal regulators who have essentially been running Guaranty in recent months have chosen Banco Bilbao Vizcaya Argentaria as the buyer. The Wall Street Journal and Bloomberg News both said that regulators had chosen BBVA, citing unnamed sources close to the negotiations. The Federal Deposit Insurance Corp. is expected to make the announcement Friday. Under the expected scenario, the FDIC will seize Guaranty, then sell most or all of it to BBVA. Guaranty’s financial condition has been deteriorating for...