U.S. stock index futures rose in volatile trading late Wednesday, suggesting further gains when markets reopen Thursday morning. Dow Jones Industrial Average futures YM00, +0.75% were up 200 points, or 1%, as of 8:30 p.m. Eastern, after swinging up and down a range of about 200 points. S&P 500 ES00, +0.41% and Nasdaq-100 futures NQ00, +0.39% were each up around 0.7%. Earlier Wednesday, the Dow DJIA, +2.39% logged its first back-to-back gains since February, though stocks fell toward the end of the session as a roadblock emerged concerning the $2 trillion coronavirus stimulus bill in the Senate.