The New Zealand dollar held on to its gains after Federal Reserve chair Janet Yellen signalled the US central bank still intends to continue tightening monetary policy, although conditions had become less supportive.
The kiwi was trading at 66.57 US cents at 8am in Wellington, from 66.59 cents at 2am, ahead of Yellen's testimony to the House Financial Services Committee in Washington, and up from 66.17 cents at 5pm yesterday.
There were no obvious catalysts for the kiwi to step higher yesterday evening, although it appeared driven by a global currency movements rather than the local currency, analysts said.
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In her semi-annual testimony, Yellen signalled confidence in the US economy, and confirmed her expectation for "gradual increases" in the central bank's key target interest rate. Still, she noted downside risks including tighter US financial conditions, persistently low inflation, a higher US dollar, global markets turmoil and risks for Chinese growth and the Chinese currency, implying that if they continued, the Fed may keep rates on hold.