The US central bank cut the Fed Funds rate by 25 basis points, as expected, but the market reacted more to chair Jerome Powell's commentary and the fact that only seven out of 17 policymakers favour a further cut this year.
With the US dollar jumping in reaction, the kiwi fell from 63.45 US cents to as low as 62.98 cents but had recovered to 63.13 cents just before stronger-than-expected domestic GDP data for the June quarter was released.
The kiwi then shot as high as 63.31 cents before gradually running out of puff as markets digested the fact that the data still showed annual growth slowing to 2.1 per cent, a six-year low.
The New Zealand dollar fell as low as 62.96 US cents, only to revive again after Australian employment data for August came out.
That showed the unemployment rate ticking up to 5.3 per cent from 5.2 per cent in July. While 34,700 jobs were created, well over twice as many as the 15,000 expected, that reflected growth in part-time jobs as full-time jobs fell 15,500.
"We've had the Fed and some pretty chunky data but the moves weren't that significant," says Mike Shirley, a dealer at Kiwibank.
Once the dust settled after the GDP data, "the market decided, yes, 2.1 per cent is better than expected, but it's still not very good," Shirley says.
"Aussie employment data is always a mixed bag, but the over-arching theme today was negative."
The market is now looking ahead to what Bank of England governor Mark Carney has to say about that central bank's latest thoughts on monetary policy.
"The sage words of Mark Carney are going to get the fine toothcomb treatment," Shirley said, given all the economic uncertainties being exacerbated by Brexit ructions.
The New Zealand dollar was unchanged at 50.54 British pence, at 57.12 euro cents from 57.25, at 68.06 yen from 68.51 and at 4.4805 Chinese yuan from 4.4784.
The two-year swap rate eased to a bid price of 0.9586 per cent from 0.9825 yesterday while 10-year swaps fell to 1.2525 per cent from 1.3250.
