Stock market today: Tesla shares pop as Elon Musk's promise of cheaper EVs charms investors

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...