The New Zealand dollar fell after Federal Reserve chair Janet Yellen kept open the chance of a rate hike next month as the world's biggest central bank tightens monetary policy, pushing up yields on US Treasuries and stoking demand for the greenback.
The kiwi slipped to 71.55 US cents as at 8am from 71.75 cents yesterday. The trade-weighted index edged down to 78.03 from 78.17.
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Yellen told the US Senate's banking committee that a "gradual rise in rates will be required" and that waiting too long "would be unwise". While she wasn't specific on when the next hike would come, she kept alive the possibility it could be as early as next month. Yields on US 10-year treasuries rose 4 basis points to 2.48 percent and the US dollar index was up 0.3 percent to 101.27.