Global equity markets surged more than 1 percent and the yen fell to a nearly seven-year low against the dollar on Friday after the Bank of Japan surprised financial markets by ramping up its massive economic stimulus program.
The unexpected jolt from the BOJ led the dollar to post its biggest daily gain against the yen in 18 months, while driving gold and silver to their lowest since 2010.
The stronger dollar also pushed Brent crude to notch its steepest monthly decline, about 9 percent, since May 2012 as the oil benchmark traded below $85 a barrel for much of the session.
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