The New Zealand dollar is heading for a 1.7 per cent weekly gain after markets rallied on the end to the US political stalemate over approving the federal budget.

The kiwi rose to 84.56 US cents at 5pm in Wellington from 83.16 cents at the start of the week. It slipped from 85.25 cents at 8am, and was little changed from 84.24 cents on Thursday.

The trade-weighted index decreased to 77.99 from 78.15 on Thursday, and is heading for a one per cent weekly gain from 77.20 at the Monday open.

Economists estimate the end to the partial shutdown of US federal government services probably sliced 0.5 of a percentage point from quarterly growth.

That slower pace of growth will likely feed into a further delay to the Federal Reserve's planned tapering of monetary stimulus, pushing out the expected appreciation of the US dollar.

"When (Fed chair Ben) Bernanke said no to tapering, the market pushed its expectation out to December, and after the shutdown that's now moved to March," said Imre Speizer, market strategist at Westpac Banking Corp in Auckland.

Chinese government figures on Friday showed the world's second-biggest economy grew at a 7.8 per cent annual pace in the July through September period, in line with expectations, and supporting currencies that export into China, such as New Zealand and Australia.

The kiwi dollar fell to 87.85 Australian cents from 88.27 cents on Thursday.

The NZ currency also fell to 82.92 yen at 5pm in Wellington from 83.07 yen and to 61.88 euro cents from 62.18 cents.

 

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