That hedge-fund manager also has legions of analysts and traders that do the manager's bidding. The idea that the manager is doing the actual button pushing on a trading terminal is bullshit as well.
Friend of a friend owns a modest investment fund and hasn't set foot in the office in a year. He directs his staff via smartphone from his boat.
Though I do not agree with th author, the author might be suggesting a situation which warrents the presence of the manager, may be meeting with a prospective client etc.
Then there is a high probability someone else picked up the prospect and he lost millions.
Friend of a friend owns a modest investment fund and hasn't set foot in the office in a year. He directs his staff via smartphone from his boat.