 Good news out of American Airlines NASDAQ: AAL this morning sparked a rally in airline stocks throughout U.S. stock markets and beyond. In afternoon trading, not only did shares of companies such as Delta and United follow American higher, but also shares of Brazilian carriers Gol Linhas Aereas Inteligentes NYSE: GOL and Azul NYSE: AZUL ended the day with even stronger gains of 11.9 and 19.1, respectively. What did American Airlines say that got air travel industry investors excited down south of the border? 