Those comments slightly improved the prospects of a deal between the two nations, Shirley says.
The US markets will be closed tonight for the Memorial Day holiday while British markets, roiled by Prime Minister Theresa May's resignation, are also closed for the Spring Bank Holiday.
New Zealand 10-year swap rates hit record lows last week after Westpac Australia's chief economist Bill Evans predicted the Reserve Bank of Australia will cut its cash rate three times this year starting in June.
Evans is even talking about the RBA using "quantitative easing," a form of money printing that involves the central bank buying bonds.
Wholesale interest rates bounced a little off last week's lows but the 10-year swap rate remains below 2 percent.
The New Zealand two-year swap rate rose to 1.4830 percent from 1.4769 on Friday while the 10-year swap rate climbed to 1.9750 percent from 1.9625.
The New Zealand dollar was trading at 94.52 Australian cents from 94.42, at 51.47 British pence from 51.40, at 58.47 euro cents from 58.48, at 71.73 yen from 71.66 and at 4.5172 Chinese yuan from 4.5214.