The New Zealand dollar jumped more than 2 per cent after the world's largest central banks agreed to cut borrowing costs for European lenders in an effort to contain the region's escalating debt crisis.
The New Zealand dollar rose to 78.22 US cents overnight, from 76.26 yesterday, and was recently at 77.91 cents.
The US Federal Reserve, the European Central Bank and their counterparts in Canada, Britain, Japan and Switzerland jointly agreed to cut interest rates on dollar liquidity swap lines by 50 basis points.
The move was designed to improve the availability of credit for businesses and households in Europe and will give participating banks easier access to euros, British pounds, Japanese yen, Swiss francs and Canadian dollars.
"There was a massive surge in risk appetite overnight" following the concerted central bank action, said Mike Burrowes, market strategist at Bank of New Zealand. "While the reaction overnight was dramatic, this action will not be the panacea to the world's ills."