"There's a lot of longs from offshore that have been taking advantage of the yield that has been priced in the curve so when that starts to disappear those longs exit." he said.
In New Zealand today, traders will be eyeing statistics on building consents for April and Reserve Bank data on household credit.
The kiwi fell to its lowest level against the Australian dollar so far this year, touching 90.93 Australian cents this morning, from 91.37 cents yesterday.
"There's been quite a big build up of long kiwi against the Aussie over the last 18 months and we are just starting to see that being unwound," said OMF's Rudings. "We have seen quite a large flow of selling kiwi/Aussie cross that's just depressing the kiwi. We can't cope with those types of flows very well."
Rudings said the kiwi may have peaked at 91.50 Australian cents for the short term.
The kiwi may remain under pressure until the upcoming Reserve Bank monetary policy statement on June 12 which is expected to provide a clearer track on the future interest rate path, Rudings said.
The local currency is also under pressure from a weaker euro, which is underpinning the greenback, and a decline in US 10-year Treasuries, considered a benchmark for global interest rates, Rudings said.
The New Zealand dollar slipped to 62.28 euro cents from 62.33 cents yesterday, was little changed a 50.67 British pence from 50.70 pence and weakened to 86.18 yen from 86.25 yen.