"The market is on tenterhooks to do with the US response to Syria and the alleged gas attacks," said Michael Johnston, a senior trader at HiFX.
The kiwi may have also gotten some support from local data such as the stronger-than-expected lift in March spending on electronic cards. Seasonally adjusted total retail spending on credit and debit cards increased 1 per cent in March, Statistics New Zealand said. Economists polled by Bloomberg expected a lift of 0.5 per cent.
Johnston said, however, the main drivers remain offshore, something he expects to continue.
The kiwi rose to 94.95 Australian cents from 94.76 Australian cents late yesterday and had outperformed its trans-Tasman counterpart in recent sessions due to the potential impact of a global trade war across the Tasman being greater than in New Zealand. Johnston said the cross-rate looked "stretched and unstainable" around these levels and he expects it to "come right back," noting the historical average is closer to 85 Australian cents.
The kiwi gained to 4.6181 yuan from 4.6144 yuan late yesterday and rose to 51.91 British pence from 51.79 pence. The kiwi traded at 59.53 euro cents from 59.40 cents and was little changed at 78.68 yen from 78.62 yen.
New Zealand's two-year swap rate lifted 3 basis points to 2.28 per cent and the 10-year swap rate eased 1 basis point to 3.13 per cent.