I don't see why his theory would treat stock investing differently. Trading in public would still be harder than doing it through your computer. The expected v

I don't see why his theory would treat stock investing differently. Trading in public would still be harder than doing it through your computer. The expected value of trading stocks is at least slightly positive. If you invest totally randomly, you will, on average, win more money than you lose. You still lose money in fees and stuff though. But you are at least starting from a positive sum game with a positive expected value. Gambling is the exact opposite. It's all a zero sum game. For everyone that wins something, someone else is losing something. At best it's exactly break even.