“While leading Tesla’s investors to believe he had a firm offer in hand, we allege that Musk had arrived at the price of $420 by assuming 20 percent premium over Tesla’s then existing share price then rounding up to $420 because of the significance of that number in marijuana culture and his belief that his girlfriend would be amused by it.” That description from the SEC sounds almost funny. But the SEC’s suit against Elon Musk is deadly serious, for him and for Tesla. And the company’s stock price is reacting accordingly. At this point, Musk could tweet that he might take Tesla private for about $260.