这些契约的隐含波动率最近几月迅速飞升(见上图)，显示出投资者对长期利率的信心摇摆。

The implied volatility of these contracts has shot up in recent months (see chart), indicating that investors are uncertain about long-term interest rates.

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本周 Lacker说”金融市场内部及自身波动，并不要求改变联邦基金利率的目标值。

“Financial-market volatility, in and of itself, does not require a change in the target federal funds rate, ” said Mr Lacker this week.

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这份法案将限制银行在复杂金融衍生品上的交易，此类金融工具经常被公司拿来对冲大宗商品价格或利率的波动。

The legislation would restrict bank trading in complex financial instruments known as derivatives, which are often used by companies to hedge against changes in commodity prices or interest rates.

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