Central banks have also been boosting liquidity into the banking sector to ensure banks keep offering credit to businesses.

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It has dramatically raised disposable incomes for the poorest without placing extra burdens on the rich, spreading social equity while boosting consumption and bolstering the banking system.

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The easing comprises a number of technical tweaks, including increasing the level of reserves in the current account and boosting the Bank's purchase of bonds, both of which should increase flows of money into the banking system.

BBC: A chart of the dollar-yen exchange rate

Boosting its retail banking business in Europe, Deutsche Bank will buy the banking operations of France's Banque Worms for an undisclosed sum.

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