Investors from Australia, Canada and the UK that meet certain criteria will be exempted from some new US restrictions on foreign investment - but New Zealand didn't make the cut.
The three countries have been added to an 'excepted states' list and may face different compliance requirements to revised US investment regulations released this week.
The finalised rules, which will come into effect on February 13, expand the influence of the Committee on Foreign Investment in the United States (CFIUS) to protect from foreign influence.
It gives US President Donald Trump and CFIUS the power to review more real estate transactions, mergers and stock purchases to ensure they do not compromise US national security.
Trump turned to CFIUS - part of the US Department of the Treasury - in 2018 to block a multi-billion-dollar bid by Singapore-based Broadcom to purchase US phone chip maker Qualcomm, citing national security concerns.
The exceptions for Australia, Canada and the UK derive from formal defence and security alliances that each of those countries has with the US, as well as similarities with the US in their existing investment screening regimes.
New Zealand has not been included in the first iteration of the 'excepted states' list - the only member of the Anglophone Five Eyes intelligence network comprising the US, UK, Canada, Australia and New Zealand.
It follows recent speculation by a top spy that New Zealand's Five Eyes membership is "on the edge of viability" because of Chinese influence - an allegation refuted by Andrew Little, the minister responsible for New Zealand's spy agencies.
US officials have informed the Ministry of Foreign Affairs and Trade that New Zealand "will be in a strong position to eventually be added to the list, based on our own recently-announced foreign investment screening reforms".
A spokesperson said: "New Zealand is a very close partner of the US, and we have a strong defence relationship. However, our defence relationship stops short of a formal alliance, which is a likely factor in determining the 'excepted states' list."
The US Embassy in New Zealand has been contacted for a response.
It's not the first time New Zealand has missed out on exemptions given to its allies by the US, such as Australia and Canada being let off steel and aluminium tariffs imposed by the Trump administration in 2018.
The tariffs remain today, despite Prime Minister Jacinda Ardern discussing exemptions for New Zealand when she met with President Trump in New York more than a year ago.
Ardern met Trump again in New York last year on the sidelines of the UN General Assembly, where the trade relationship between New Zealand and the United States was a key topic.
"An excellent discussion on trade. I would say that discussion was met with enthusiasm by the President and I expect talks will be ongoing," Ardern said at the time.
It's not all bad for New Zealand. In 2018, President Trump signed a law allowing Kiwis better business access to the United States, which was welcomed by Ardern.
New Zealand's trade agreements
The Government is currently pursuing a free trade agreement with the US. Deputy Prime Minister and Foreign Minister Winston Peters met with US Vice President Mike Pence in Washington last year for talks.
New Zealand is also part of the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) which includes Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, Peru, Singapore, and Vietnam.
China and South Korea have free trade agreements with New Zealand.