Wrong. He used all of his cash to finance TSLA. He loaned them his last 100 mil to get them out of a jam. Then things turned up and its been up up and away.
Hedge Funds Are Training Their Computers to Think Like You
https://www.bloomberg.com/news/articles/2017-03-27/hedge-fund-quants-close-in-on-designing-ultimate-trader-s-brain
FWIW Google did a series of presentations on using ML/DL in the cloud recently. A Lot of concrete examples from business were presented. Very informative.
It's pretty wild how fast this stuff is rolling out to industry. Google used DL to revamp their Google Translation app in 9 months last...