“A regulator's greatest fear is the sequential collapse of hedge funds, banks, and brokerages. That process is hard to spot and even harder to stop.
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There are two sides to every trade. In a crash there can be just as many winners as losers. The problem arises when the losers go out of business. At that point the winners can't collect so they become losers too. It's as if you were a big winner at roulette and went to the cashier to collect your winnings only to find the cashier window closed and the casino had just filed for bankruptcy. All you have left is a pocketful of worthless chips. At that point, even the market winners can fall into financial distress. Because of leverage, total losses can exceed the size of the market itself. It's like a minefield. Banks running from panic start stepping on mines.”