Markets have been a bit "jittery" on geopolitical tensions, including a political crisis in Germany after German Chancellor Angela Merkel's failure to form a three-way coalition government and "NZD doesn't perform as well in a more volatile environment".
The Australian and the New Zealand dollar have also lost ground as their respective central banks are seen as being firmly on hold while the Fed is poised to hike.
"Antipodean currencies are out of favor," said Borkin.
New Zealand's two-year swap rate was unchanged at 2.15 per cent while 10-year swap rate was unchanged at 3.11 per cent.
Looking ahead, Borkin said the overnight Global Dairy Trade auction will be closely watched.
Dairy prices have fallen in the past three auctions and the futures are currently pointing to a slight rise in whole milk powder prices. If the result were to disappoint, it would add to the pressure on the kiwi, he said.
The kiwi traded at 57.95 euro cents from 58.03 cents yesterday and at 90.23 Australian cents from 90.15 cents. It fell to 51.35p from 51.59p. The local currency traded at 4.5135 yuan from 4.5186 yuan and rose to 76.55 yen from 76.29 yen.