If it’s scheduled, which I know a lot of execs need to do anyways to trade stock, and it’s not just randomized and he knows when those sales happen, and he knows his decision is going to tank the price, he can manipulate what he announces and when it’s announced.

What’s stopping him from just announcing this, selling the stock in a timer, then waiting just before he’s scheduled to buy stock and announce that he’s changed his mind?

If I’m the guy who bought that stock from him I’d want to sue. He fucked some sucker over