The question reminds me of the old joke about mathematicians being introverts.
Maybe traders are of the same breed.
A physicist, and engineer and a mathematician were discussing their love lives.
The physicist said: "It's a good idea I'm intelligent, because it means I can remember the lies I tell my wife when I'm off with my mistress. She knows no different."
The engineer said, "I just tell the wife that I have an old boiler to maintain, and off I go with my mistress. She knows no different."
The mathematician said, "Both my wife and my mistress know about each other. No worries. Each of them thinks I'm with the other, whereas in fact I'm sitting on my own in a room getting some math done."