It’s hard to imagine a more terrifying prospect than a 30-year-old trader risking billions in unauthorized speculative bets at that the same time his own personal finances spiraled out of control. Which is of course what prosecutors say happened in the case of Kweku Adoboli, the former UBS trader who squandered billions when unhedged positions turned against him. Indeed, as Mr. Adoboli was risking as much as $12 billion for UBS, he was losing hundreds of thousands of dollars in personal trading accounts that violated the firms rules. Read More