That would probably get shut down pretty quickly, as it would be essentially allowing a group of small-time players to make non-sports-related proposition bets.
How betting on the performance of a company is any different from betting on the performance of an athlete or a horse just boggles my mind. Sure, in the short term the variance is lower, but it's still a fucking gamble. It's also the only legal way to gamble in all 50 states.