Quote from the1:
Newsflash: Traders at banks don't use stop losses. They use quantitative strategies with multiple instruments to manage risk.
Well, it is true that bank desks are almost always hedging their risk through arbitrage, spread trades, and hedged market-making.
Bank traders do, however, have individualized agreements in terms of capital allocations, max drawdowns, and daily losses. At my firm, it was called the "appendix C" - which was actually a specific appendix to my employment contract. Their supervisors will stop them out unilaterally -
that is why these 'rogues' go to such great lengths to hide stinkers. Even with the OTC products, each trade is supposed to get promptly logged into the firm's risk tracking system by the trader.
So, like every trader, there is in fact an 'uncle' point that is defined - whether it is the trader taking the loss, or the clearing firm offsetting the position and closing out the trader's account, or the firm locking the trader out of the system, or whatever. There is no endless supply of capital to never take a loss.
And whether you want to color it a 'stop loss' or whatever is really trivial. There is so much naivety and disinformation posted here on ET.