CEOs usually have a large stake in the company. Sometimes massively large. Whatever skin you’ve got in the game, they’ve got more.
If their stock drops inexplicably from $60 to $40, the CEO is taking a massive hit to their net worth.
If the company isn’t coming out with positive PR, or trying to reassure investors, it's possible they've already signed a deal to sell for $90. After all, what difference does it make if it the