In this case he was trading options contracts - which are leveraged anyway - and probably trading on margin so perhaps a tenth of the contract up front.
(, Fri 21 Apr 2017, 12:06, Reply)
What I meant was he had no capital at all so he took a loan to even get the deal set up.
(, Fri 21 Apr 2017, 12:19, Reply)
He should have just mugged old ladies coming out of the post office.
(, Fri 21 Apr 2017, 12:28, Reply)
Frankly it all sounds rather implausible. I very much doubt he was short selling. He was probably spread betting.
(, Fri 21 Apr 2017, 12:33, Reply)