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The world’s tentative experiment with negative interest rates got off to an unremarkable start.Sweden’s Riksbank – the world’s oldest central bank – became the first major monetary authority to cross the rubicon and take its main policy rate into the red exactly a year ago to the month (see map above).The Riksbank’s move followed the likes of Switzerland and Denmark, who had turned negative in a bid to stimulate flagging inflation and halt the punishing appreciation of their currencies.

Source: Mapped: Negative central bank interest rates now herald new danger for the world – Telegraph