I haven't seen "Margin call" so for me the best film ever about financial markets is "The big short". It's a real thriller, and, as far as I can judge, as accurate as movies go. It also shows something important: it takes a lot of guts /
to go short. Shorters make money when they go against the market "consensus" that a security will go up. Given that there is no upper bound to the amounts of money they can lose if their assessment is wrong, they face very strong incentives to be very well informed. That's also/
what you see in the movie: they reached the conclusion that the subprime market was about to blow up after careful field research that demonstrated the disputable practices of mortgage lenders. You cannot simultaneously claim that bubbles demonstrate the inefficiency of /
financial markets, and claim that shorting should be banned: shorters are the canaries in the coal mine. Which doesn't mean that shorting can never be a problem, for instance if shorters deliberately spread false information in order to get prices down.
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