American Airlines (AAL 13.02%) shares surged 12.7% on Thursday, July 10, to close at $12.94, riding the tailwind of a broader airline sector rally related to positive results and guidance for Delta Air Lines (DAL 11.99$12.13 to $13.18 throughout the session, as investors digested positive news from competitors.The impressive gain came on a day when the S&P 500 rose 0.27% and the Dow Jones Industrial Average advanced 0.43%. American's performance was in line wit ...