Amid the uncertainty, stock markets endured a difficult week, with the Dow Jones Industrial Average closing at its lowest level in nearly 12 years.

证券市场于变化不定中度过了一个艰难的星期，道琼斯工业平均指数以近12年的最低水平收盘。

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Overall volume in PEP options was roughly three times the average daily level for the stock as of 11:00 a.m.

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Japan's Nikkei Stock Average climbed 2% to the highest level seen since July 2008 as markets reacted to the Bank of Japan's new aggressive efforts to ease monetary policy.

WSJ: Stocks Notch Another Record

In Asia, Japan's Nikkei Stock Average surged 1.9% to its highest level since June 2008.

WSJ: U.S. Stocks Close Higher