So according to the wiki, https://en.wikipedia.org/wiki/Citadel_LLC, they got 35B of AUM. Their revenue was allegedly 6.7B in 2020, according to https://www.bloomberg.com/news/arti...s-reaps-record-6-7-billion-year-on-volatility.
With that, their implied trading performance was about 19.1% in 2020. I think it's fair to say most of us here had outperformed that, probably by a wide margin. So what's so special about their "secret strategy"? Maybe it's just a special execution thing to improve scalability.
scalabilty is a huge deal especially when your goal is to be absolute return.
Risk management is another.