由于新规强制要求银行为波动性强的互换合约以及各类衍生品合约预留大量准备金，这些原本盈利的合约转而出现亏损。
Once profitable swaps and assorted derivatives contracts sprung losses when new rules mandated that Banks back those volatile contracts with heavy reserves.
由于新规强制要求银行为波动性强的互换合约以及各类衍生品合约预留大量准备金，这些原本盈利的合约转而出现亏损。
Once profitable swaps and assorted derivatives contracts sprung losses when new rules mandated that Banks back those volatile contracts with heavy reserves.
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