With U.S. stock futures trading mixed this morning on Friday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Chevron Corporation (NYSE:CVX) to report quarterly earnings at $2.43 per share on revenue of $48.99 billion before the opening bell, according to data from Benzinga Pro. Chevron shares fell 0.5% to $148.04 in after-hours trading.Apple Inc. (NASDAQ:AAPL) reported better-than-expected earnings and sales results for the fourth quarter. The company reported fiscal fourth-quarter revenue of $94.9 billion, beating analyst estimates of $94.56 billion….