Still, "it is not an easy road higher for the kiwi," he said. "The fact all this (central bank) activity is being undertaken, you're acknowledging the landscape is such that you have to take further action."
Traders are looking ahead to the meeting of central bankers at Jackson Hole, Wyoming, as the next opportunity for Federal Reserve chairman Ben Bernanke to hint at what form more stimulus could take.
"Bernanke is likely to say something that will be followed by the market," Sinton said.
With central bankers in major economies needing act to underpin growth, New Zealand's outlook is relatively benign, reasonably supported by fundamentals and nominal yields on offer much better than available elsewhere, he said.
New Zealand 10-year bonds are yielding about 3.73 per cent compared to about 1.7 per cent for comparable 10-year Treasuries and 1.44 per cent for 10-year German bunds.
The kiwi traded at 64.96 euro cents from 64.87 cents yesterday and fell to 63.86 Japanese yen from 64.10 yen. Japan's currency strengthened to 78.53 per US dollar from 79.15 immediately before the FOMC minutes were released.
The New Zealand dollar traded at 77.42 Australian cents from 77.35 cents and was little changed at 51.24 British pence from 51.22 pence.