With U.S. stock futures trading mixed this morning on Tuesday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Pfizer Inc. (NYSE:PFE) to report quarterly earnings at 62 cents per share on revenue of $14.95 billion before the opening bell, according to data from Benzinga Pro. Pfizer shares gained 0.3% to $28.95 in after-hours trading.Analysts are expecting Phillips 66 (NYSE:PSX) to post quarterly earnings at $1.66 per share on revenue of $34.46 billion. The company will release earnings before the markets open. Phillips 66 shares rose 0.3% to $129.32 in…