"New Zealand political developments are of little market interest at this juncture," said Wong.
The outcome of the election is now less certain, with recent polls showing a narrow gap between the governing National Party and the opposition Labour Party in the wake of Ardern assuming the leadership.
However, Bank of New Zealand senior economist Craig Ebert said international investors "tend to be more concerned about big lurches to the left or right, rather than leanings to the centre-left or centre-right. So the range of likely outcomes still limits the potential degree of market reaction, to our mind."
The kiwi traded at 62.25 euro cents from 62.12 cents on Friday in New York. It was at 56.81 British pence from 56.80 British pence and traded at 4.8798 yuan from 4.8758 yuan. The local currency was at 92.30 Australian cents from 92.25 cents and at 79.89 yen from 79.92 yen.
New Zealand's two-year swap rate rose 1 basis point tot 2.17 per cent while 10-year swaps rose 2 basis points to 3.14 per cent.