For Tuesday, April 21, 2015 we take you through the notable quarterly earnings and key data to watch on Wall Street. Look out for financial results from Verizon Communications (VZ), United Technologies Corp (UTX), Under Armour (UA), Yahoo! Inc (YHOO), Chipotle Mexican Grill (CMG), and Yum! Brands Inc (YUM). United Technologies is expected by analysts to report its earnings before the opening bell. TheStreet's Jim Cramer says the company's latest analyst day was highlighted by the announcement of a potential spin-off and a new buyback plan. On the economic calendar, we point out the Redbook index. TheStreet's Kurumi Fukushima reports in New York.