"For a world first, the announcement came with remarkably little fanfare.
But last month, the Swedish Riksbank entered uncharted territory when it became the world’s first central bank to introduce negative interest rates on bank deposits.
But, as they contemplate their exit strategies after the extraordinary measures of the past two years, central bankers will be monitoring the Swedish experiment closely.
Mervyn King, the Bank of England governor, has hinted he may follow the Swedish example as the danger of a so-called liquidity trap, where cash remains stuck in the banking system and does not filter out to the wider economy, is an increasing concern for the UK.
Hoarding is exactly what happened in Japan earlier this decade when the Bank of Japan implemented quantitative easing between 2001 and 2006. "