The New Zealand dollar was firmer but well within its recent range as the market focuses on escalating tensions in the Middle East after Iran seized a British-flagged tanker.
The kiwi was trading at 67.74 US cents at 5pm in Wellington from 67.62 at 8am and 67.61 late Friday in New York. The trade-weighted rose to 74.05 points from 73.89.
The Guardian newspaper reported signs that Iran is preparing for a long standoff and that British Foreign Secretary Jeremy Hunt is being pressured to join US-led plans for an international maritime protection force in the Persian Gulf.
The kiwi's gain was despite those tensions encouraging many to flee for the safety of the greenback.
"It's only the New Zealand dollar that has moved over the course of this afternoon and it's not a substantial move, about 15 points," says Mike Shirley, a dealer at Kiwibank. "It's just a wobble in the scheme of things. There's no easily identifiable driver of the lift."