With U.S. stock futures trading higher this morning on Wednesday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Delta Air Lines, Inc. (NYSE: DAL) to report quarterly earnings at 36 cents per share on revenue of $12.57 billion before the opening bell, according to data from Benzinga Pro. Delta Air shares gained 0.3% to $47.46 in after-hours trading. PriceSmart, Inc. (NASDAQ: PSMT) posted better-than-expected earnings for its second quarter. The company reported quarterly earnings of ...