Maybe the investors are all Brock marks?

Actually, there was a massive buy-in post-Rumble when WWE announced its topping of a million Network subs (used to counter the #Cancel movement). It actually looks like (though this isn't the case) that the investors bought in when Reigns won the Rumble, and began selling en masse when he got 'screwed' last night.

I know nothing about stocks, so I like tying it in to the booking to make myself feel smarter.