The latest trouble spot is an area called credit-default swaps, which are private contracts that let firms trade bets on whether a borrower is going to default.
最近的麻烦点在一个被称为信用违约互换的领域，这是让企业交易在借款是否会违约上面打赌的私人契约。
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Regulators hope that as more derivatives trade on exchanges, it will be easier to spot suspicious trading patterns across asset classes.
监管机构希望更多的衍生产品交易在交易所内进行，这样可以更容易发现可疑的涉及资产类别的交易。
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The survivors' staircase at the World Trade Center was moved to its permanent spot on Dec. 11, 2008.