Tesla backlash continues as the stock nosedives and Musk pushes conspiracy theories about protests and arsons at dealerships.

Tesla shares dropped more than 15% on Monday, making it the worst performer in the S&P 500 Index. Tesla’s stock has dropped by nearly half in three months. Even so, investors are still debating whether Elon Musk’s electric-vehicle maker remains overpriced.

Tesla stock has been struggling lately. Investors have hoped for a bounce as some of the politics driving increased uncertainty among investor uncertainty subside. A rebound, however, didn’t materialize Monday as investors considered the possibility of a recession and a Wall Street analyst cut his forecast of deliveries.