Earlier quoted context omitted.
How do their hedge funds perform compared to benchmarks?
They're proprietary traders (that is, they trade with their own money and don't have clients - unlike a hedge fund), so they're very unlikely to tell the world what their performance looks like. If it's bad, they'd not want you to know, if it's good they'd not want their competitors to know!
It would be interesting to know how these private black box firms actually performed compared with the returns on a transparent security like the Vanguard S&P 500 fund.