"The bank will remain vigilant on its criteria for intervention, and will be prepared to intervene if all its conditions are met," he said.
The central bank would prefer to see the kiwi dollar lower "provided it can be achieved without damaging price and financial stability," he said. "Ultimately it is the relative rates of return between New Zealand and the rest of the world that explains the strength of the New Zealand dollar."
New Zealand 10-year government bonds are yielding about 3.62 per cent, or 179 basis points more than the equivalent US Treasuries. The OCR at 2.5 per cent compares to the Federal Reserve's target of near zero.
"In order to achieve a sustained reduction in the New Zealand dollar, it would be necessary to alter the overall level and pattern of saving and investment in the economy," Wheeler said. "In particular, it will be necessary to tackle our addiction of depending on foreign savings to finance our consumption and investment."
"Monetary policy by itself cannot deliver quick fixes to achieve and sustain more rapid economic growth, lower unemployment, or maintain a lower exchange rate," Wheeler said. "Other policies are central for achieving these outcomes but when they are applied monetary policy can be supportive of them."