Amid a quiet Thursday for the stock market, more stocks still hit new highs than those that rang new lows. And south of the U.S. border, the Mexican stock market remains hot. As the Major World Markets table on IBD's World Stocks page shows, Mexico's IPC benchmark is the runaway winner in the Americas, with a 26% year-to-date gain as of Thursday's IBD. One of that market's leaders is Grupo Aeroportuario del Sureste (ASR), which