S&P 500 hits new high as stocks rise in bull market.

US stock futures were mostly flat on Thursday night after the S&P 500 closed at its highest level for the year. Dow Jones futures fell by 0.11%, S&P 500 futures dipped 0.04%, while Nasdaq 100 futures rose 0.04%. DocuSign shares jumped nearly 5% in extended trading after the electronic agreements firm beat analysts' first-quarter expectations on the top and bottom lines. Meanwhile, Vail Resorts shares fell 3.9% after missing third-quarter earnings expectations, and General Motors advanced 3% after announcing a partnership with Tesla to use the electric vehicle maker's charging network in North America.