“You can’t beat the house” is a refrain sung by gambling naysayers and entrepreneurs who profit on the backs of gamblers alike when it comes to betting your cash in Las Vegas or the new-fangled and now legal sports betting outfits. Anybody at all familiar with probability and statistics knows this. Keep playing and eventually, you’ll find yourself on the losing side given that the house enjoys as little as a 2% advantage — and as much as 15% or even 20% — depending on the game or venue. But the stock market is (in theory) something different. Now that...