Stock investors kicked into selling mode after the U.S. economy posted subpar growth in the first quarter.  The Dow Jones Industrial Average fell by triple digits, with the S&P 500 and tech-heavy Nasdaq Composite also seeing sharp pullbacks in early trading. IBM, Caterpillar and Microsoft – which reports earnings after the close of trading – paced the Dow's steep drop, while Merck, Coca-Cola and Apple rose. Google parent Alphabet and Intel will also report results later today. Ticker Security Last Change Ch ...