With U.S. stock futures trading higher this morning on Tuesday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Carnival Corporation (NYSE:CCL) to report a quarterly loss at $0.2 per share on revenue of $5.68 billion after the closing bell, according to data from Benzinga Pro. Carnival shares gained 0.4% to $14.73 in after-hours trading. Boeing Co. (NYSE:BA) proposed to acquire Spirit AeroSystems Holdings Inc. ...