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Stefan Ingves, governor of the Riskbank, Sweden's central bank, speaks during a news conference following an interest rate announcement in Stockholm, Sweden, on Wednesday, Oct. 28, 2015. The Riksbank expanded its bond-purchase plan for a fourth time since February as policy makers in Sweden struggle to keep pace with stimulus measures in the euro zone. Photographer: Johan Jeppsson/Bloomberg via Getty Images

Stefan Ingves, governor of the Riskbank, Sweden's central bank, speaks during a news conference following an interest rate announcement in Stockholm, Sweden, on Wednesday, Oct. 28, 2015. The Riksbank expanded its bond-purchase plan for a fourth time since February as policy makers in Sweden struggle to keep pace with stimulus measures in the euro zone. Photographer: Johan Jeppsson/Bloomberg via Getty Images