U.S. stock futures were lower this morning, with the Dow futures falling around 100 points on Thursday. Shares of Exact Sciences Corporation (NASDAQ:EXAS) fell sharply in today’s pre-market trading after the company reported mixed first-quarter financial results. Exact Sciences said first-quarter revenue increased 6% year-over-year to $638 million, which beat the consensus estimate of $627.355 million, according to Benzinga Pro. The company reported a quarterly loss of 60 cents per share, which missed analyst estimates for a loss of 48 cents per share. Exact Sciences shares dipped 17.4% to $49…