The New Zealand dollar extended its gains amid concern financial markets have been building too much optimism about US President Donald Trump's ability to deliver tax cuts and US economic growth.
The kiwi rose to 72.25 US cents as at 5pm in Wellington, and earlier touched a week-high of 72.40 cents from 71.73 cents late yesterday. The trade-weighted index rose to 78.55 from 78.11.
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The US dollar initially gained overnight after figures showed the US consumers price index rose 2.5 per cent in the 12 months through January, the biggest year-on-year gain since March 2012, and faster than economists were expecting. But the greenback subsequently gave up its gains amid concern too much weight has been given to possible Trump policies such as the tax cuts that he has hinted at, given the White House has to win over the Congress and Senate for major policy changes.