[jefftk]

How does it reflect poorly on Jane Street? These are people who left, after not very long.

If your thesis is "they were inexperienced and operating without sufficient supervision" then that's a big part of what the structure of a place like Jane Street gets you.

[bmitc]

I think it means Jane Street likely hires with a lot of bias for elites and “twitchy” smart people. The CEO of Alameda was an intern there and invited back for a full time position. Hearing her speak in interviews makes it seem like she has no idea what she’s doing and not all that intelligent or thoughtful. So it’s weird that she, seemingly easily given she states in interviews that she had no trading experience prior to Jane Street, made it through their supposedly rigorous hiring process. It seems their hiring process may not be as rigorous or effective as they hoped, which seems obvious even looking at the process in a vacuum.