"The market appeared to brush off the weaker headline US GDP report after underlying details gave a better forward-looking picture," ANZ Bank New Zealand chief economist Cameron Bagrie said in a note.
Bagrie said if the kiwi's decline below 68.60 US cents is sustained, it could push to mid-66 cents. "This weakness is at odds with local data, but global nuances are dominating. The finger can partly be pointed at protectionist nuances."
The local currency was little changed at 52.96 British pence from 53 pence on Friday in New York after figures showed the UK economy grew slower than expected and as British leaders reached an agreement with their European Union counterparts on formal guidelines for Brexit talks. The kiwi fell to 62.80 euro cents from 63 cents last week.
The New Zealand dollar traded at 91.74 Australian cents from 91.63 cents last week and fell to 4.7238 Chinese yuan from 4.7307 yuan. It dropped to 76.28 yen from 76.58 yen last week.