On the train to my mum's house, I read
"Fischer Black and the revolutionary idea of Finance" by Perry
Mehrling. Fischer Black was a theorist who invented ways to study the
stock market and money. I am starting to understand this derivative
(in the finance sense) business a bit better. He was a loner
recluse, but still managed to be married 3 times. He had a very
clever filing system that allowed him to work very efficiently.
I didn't know that they didn't understand the stockmarket in the late 60s,
and early 70s.