If we're investors, and not gamblers, why do we get an explanation about negative value bets with only gambling examples? It feels like negative value bets don't exist in investment. You can't say a bet is negative value when you don't know the odds, and the whole reason people are making so much money market making is that no one actually knows the odds, so no one knows the "real" value of any instrument. If you're…
Options are deliberately negative EV. They need to be negative EV to be long so that there is an incentive for option sellers to sell premium. Otherwise option seller would just get steamrolled every time.