Tesla's shares sank nearly 7% in premarket trading as the EV giant grapples with sinking sales and mounting doubts over its future under CEO Elon Musk, deepening investor anxiety after another shaky quarter.

Tesla has offered low-interest loans and other incentives to try to revive sales, but these efforts have depressed the company’s profits. Tesla’s newest model, the Cybertruck pickup, has been a flop. The company sold 4,300 Cybertrucks in the second quarter, according to Cox Automotive, a 50 percent decline from a year earlier.