American Airlines Group (NASDAQ:AAL), one of the biggest U.S. airlines, closed Wednesday at $11.41, up 5.55%. The stock advanced as easing U.S.-Iran tensions and lower oil prices improved sentiment toward airline profitability. Trading volume reached 100.3 million shares, coming in about 53% above its three-month average of 65.6 million shares. American Airlines Group IPO'd in 2005 and has fallen 46% since going public. How the markets moved today The S&P 500 (SNPINDEX:^GSPC) gained 2.51% to finish Wedn ...