With U.S. stock futures trading slightly lower this morning on Tuesday, here are some stocks that may grab investor focus today: Wall Street expects PepsiCo, Inc. (NASDAQ:PEP) to report quarterly earnings at $1.52 per share on revenue of $18.08 billion before the opening bell, according to data from Benzinga Pro. PepsiCo shares fell 1% to $174.79 in after-hours trading. Packaging Corporation of America (NYSE:PKG) posted better-than-expected earnings ...