With U.S. stock futures trading slightly higher this morning on Tuesday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Lowe’s Companies, Inc. (NYSE:LOW) to report quarterly earnings at $3.99 per share on revenue of $24.01 billion before the opening bell, according to data from Benzinga Pro. Lowe’s shares fell 0.2% to $242.70 in after-hours trading.Palo Alto Networks, Inc. (NASDAQ:PANW) reported better-than-expected results for its fourth quarter and issued strong guidance. Palo Alto’s board authorized an additional $500 million for share repurchases,…