Tesla CEO Elon Musk.Christian Marquardt - Pool/Getty Images Tesla shares jumped ahead of the opening bell Wednesday after months of declines. The EV maker posted disappointing quarterly earnings, but talk of new models excited investors. Meanwhile, Nasdaq futures rose 0.6% and S&P 500 futures ticked up 0.2%. Tesla's stock rallied before the opening bell on Wednesday as investors reacted to the electric car maker's first-quarter earnings report.Shares rose as high as 13% in premarket trading and were still up 10% shortly after 5 a.m.