I’m referring to RenTech’s well known Medallion fund, which I believe is now only available internally to longtime employees. Even in the article you linked, it says this fund has “continued to shine”.
If you think about it a little bit...And you read "Fooled By Randomness", there are 20 other tricks they could be playing here...Instead of "predicting" the market.
"Jim Simons' Renaissance Technologies suffers $11 billion of client withdrawals in 7 months" - https://markets.businessinsider.com/news/stocks/jim-simons-r...