The Detroit carmaker is creating a domestic supply base to make EVs cheaper and profitable aided by Kurt Kelty, who landed Tesla’s top battery supplier in its early days.

Tesla shares have become a vehicle for investors to wager on Musk himself, rather than the company. That has advantages, but also poses risks.

Tesla (TSLA) reported fourth-quarter revenue and adjusted profit below analysts' estimates in extended trading Wednesday. Shares initially fell and then rose after the results' release. Tesla posted net income of $2.