I think you're reading far far more into what I wrote than what I wrote! There's nothing inherently unethical about banks making money through MM, building structured products, facilitating OTC trading, underwriting equity and debt offerings, facilitating buyouts.... Certainly there are folks who act unethically in each of those areas, heck I ran into people acting unethically serving their country so there's going to be some of that everywhere, but none of it is inherently unethical. That's what bankers do, that's how they make money at least post Volcker Rule. The OP I was responding to was criticizing bankers as a whole, apparently because of their apparent lack of ability to forecast a bear market, and stating that this makes them idiots. I'm pointing out that they chose to be in a business (market making, structured products, advising...) that's making them all plenty of money while he chose one (individual trader) that I can pretty confidently say is not making him a lot of money. That is all. Nothing to do with moral hazard of prop trading inside a bank at all, we're in violent agreement about that. I'd go further to point out the hurdle rates and incentive structures that existed couldn't have been better designed to amplify the moral hazard and make doubling down the only rational thing to do when you were underwater with only a short time to go before the end of the year/period, so it wasn't just the individuals but the system as a whole that was rotten. Hence I'm generally a fan of the Volcker Rule. If I ran a bank I'd also shut down the prop trading absent the rule because the variance of the returns is so great that even if the mean was profitable over time the variance costs the bank more than the operation brings in due the the resultant increase in WACC for the entire bank.