With U.S. stock futures trading lower this morning on Wednesday, 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 54 cents per share on revenue of $14.20 billion before the opening bell, according to data from Benzinga Pro. Pfizer shares rose 0.2% to $25.68 in after-hours trading.
• Leggett & Platt, Incorporated (NYSE:LEG) posted weaker-than-expected results for its first quarter. Leggett & Platt shares fell 13.1% to $15.70 in the after-hours trading session.
• Analysts are expecting Yum! Brands, Inc. (NYSE:YUM) to post quarterly earnings at $1.20 per share on revenue of $1.71 billion. The company will release earnings before the markets open. Yum! Brands shares fell 0.6% to $140.45 in after-hours trading.

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• Amazon.com Inc (NASDAQ:AMZN) reported upbeat results for its first quarter on Tuesday, but issued weak sales forecast for the second quarter. The company reported first-quarter net sales of $143.3 billion, up 13% year-over-year. The net sales total beat a Street consensus estimate of $142.5 billion, according to data from Benzinga Pro. Amazon reported earnings per share of 98 cents in the first quarter, beating a Street consensus estimate of 82 cents per share. Amazon shares gained 1.3% to $177.20 in the after-hours trading session.
• Analysts expect Mastercard Incorporated (NYSE:MA) to post quarterly earnings at $3.24 per share on revenue of $6.34 billion before the opening bell. Mastercard shares rose 0.7% to $454.50 in after-hours trading.