Dude, what is "GS trading arm"? GSAM? ECM/DCM? They would be your boys if you had ever worked there. Have you? Yup, thought so.
Since we’re not talking about zero losses but “beating the system” then maybe @destriero would qualify since he had like 10x higher profit than drawdowns. Too bad the guy appears to be dead now (suicide?). While even Renaissance’s Medallion had large drawdowns, implied by the recent book.
As far as I know he just changed his nickname again. Couldn't say to what however. He used to have another one too ...
No Risk... No Reward!... It`s Not about No losses... No such thing! There is always an acceptable risk/ acceptable loss in every single business endeavor, no mater what it is! The key is how one mitigates ones risk & maximizes their strengths/ winners! If you`re seeking the magic key/ formula to the market that doesn`t allow a loss... let me save you the suspense, it does not exist... embrace the risk & mitigate your losses!
Has someone figured out how to basically not lose? Yes, absolutely. Particularly traders who have been successful for a long time. For example they could go long NQ and knowing even if it went to 0(if it did they'd have bigger problems anyways) that they still would be fine, due to all the gains they had in the previous years / decades. So they basically can just go long and defend there long until it's profitable. Now add in good technical read and ability(and proper understanding) of when to average into the long and it's very very difficult for someone like that to have a losing month or even day. As far as 100% win rate. No need to discuss that, because it's impossible to have a 100% win rate and make any type of consistent returns relative to your account size. All it would take is just once to get caught in a long or a short and there goes your 100% win rate unless you wait years for the position to come back and get out.... just to say your win rate is 100%.