The New Zealand dollar fell as the greenback advanced after better-than-expected US data on inflation and business orders bolstered confidence about the outlook for the world's largest economy.
The kiwi slipped to 75.31 US cents at 8am in Wellington, from 75.63 cents at 5pm yesterday.
The trade-weighted index was at 78.22 from 78.26 yesterday.
The dollar index, which measures the greenback against a basket of currencies, jumped to a five-week high after a report showed US core inflation, which excludes volatile food and energy costs, rose 0.2 per cent, ahead of the 0.1 per cent expected by economists in a Reuters poll.
Separate data showed US durable orders rebounded 2.8 per cent in January, ahead of the 1.7 per cent forecast and a turnaround from December's 3.7 per cent decline.