One of the most important thing to learn when trading is risk management, how to preserve your capital. Being wrong is part of trading, staying wrong isn't. It

One of the most important thing to learn when trading is risk management, how to preserve your capital. Being wrong is part of trading, staying wrong isn't. It's especially interesting to see it happen to someone that actually worked as a risk manager in his early days ; especially so close to the anniversary of Lehman's demise.