Donald Trump has ordered Federal Reserve Governor Lisa Cook to a closed-door White House hearing on 5 November over alleged false statements on mortgage applications. It is his latest attempt to remove a sitting rate-setter. It is easy to file this under American theatre. That would be a mistake. New Zealand borrows, hedges and invests through US markets. If investors start pricing political control of the world’s reserve currency, the bill lands on Kiwi mortgage and business lending rates.
Washington is trying again, with paperwork
Cook sits on the Fed’s 12-member voting committee, denies wrongdoing and has not been charged. A Supreme Court ruling in June let her keep her job but left room for Trump to try again with proper process. His memo says it is his job to ensure laws are “faithfully executed, including by firing subordinates who cannot be trusted“.
The institution has held, for now. The rate committee, chaired by Trump’s own appointee Kevin Warsh, voted unanimously to raise rates on 16 September despite the President demanding cuts. That is the reassuring part. The worrying part is the pattern.
Bullying the Fed pushes rates up, not down
In January 2026 the Department of Justice served then-Fed chair Jerome Powell with grand jury subpoenas. Powell called it a pretext, saying the threat of charges was a consequence of setting rates “rather than following the preferences of the President”.
Economist Mohamed El-Erian warned at the time that losing the Fed’s technocratic commitment to price stability risked “unanchored inflation expectations, macroeconomic instability, and heightened financial volatility”, with spillovers well beyond US borders.
Former Reserve Bank governor Don Brash put the irony more bluntly in February 2026: if Trump wants lower rates, pressuring the Fed is “the last thing he should be doing”, because a bullied central bank is “more likely to increase bond rates”. That is the whole argument in one line. Investors who suspect rates are being set for political convenience demand compensation for the inflation risk. Everyone who borrows in dollar-linked markets pays it.
Wellington has already flinched once
New Zealand has had its own skirmish over this. In January 2026, then-RBNZ governor Anna Breman joined 13 other central bank chiefs in backing Powell, declaring independence “a cornerstone of price, financial and economic stability”.
Foreign Minister Winston Peters told her to “stay in her New Zealand lane”. Finance Minister Nicola Willis said Breman should have sought advice before signing, while insisting she still respected the bank’s monetary policy independence.
The diplomatic caution is understandable with a volatile trading partner. But the substance matters more than the protocol. Breman was defending the exact principle that keeps New Zealand’s own borrowing costs anchored. In 2025, then-governor Christian Hawkesby had warned that central bank independence was under attack in ways that would have been unheard of a decade earlier. A government that champions fiscal discipline should be the loudest defender of rules-based monetary policy, not the one reaching for the scolding letter.
The exposure is measured in hundreds of billions
This is not abstract. New Zealand investment in the US climbed to $193.2 billion by March 2026, up from $171.5 billion a year earlier. Foreign-currency external debt sits at $190.5 billion, with 96.2% hedged.
That hedge ratio protects against currency swings, but hedging is not free. Its cost rises with volatility and risk premiums. A credibility shock at the Fed does not need to move the kiwi dollar to hurt. It only needs to make wholesale funding and hedging dearer, and banks pass that straight through.
The timing is poor. The OCR was 2.25% in April and reached 2.75% by September, with annual inflation at 4.1% in the June quarter, well above target. That pressure is mostly oil, not Washington. But markets already price an OCR near 3% by year end. A politically driven lift in US bond yields would stack on top of that.
Economist Paul Conway warned in 2026 that if the politicisation of central banks “kicks off in the US” there was a real risk of it spreading. For a small, heavily indebted, open economy, spreading is the default.
What to watch on 5 November
The Cook hearing is private, but a transcript will be published. Watch US 10-year Treasury yields in the days after, not the headlines. If Cook is removed and yields climb while the Fed is holding steady, that is the market pricing politics, and New Zealand banks’ offshore funding will reprice with it.
For business owners weighing fixed versus floating terms, or capital spending into 2027, Fed credibility is now a genuine input into the decision. The irony is that Trump wants cheaper money. The surest way to deny it to himself, and to Kiwi borrowers, is to keep doing what he is doing.
Sources
- Stuff: Trump establishes committee to investigate Federal Reserve’s Lisa Cook in latest effort to fire her (2026-10-10)
- RNZ: Trump administration threatens US Federal Reserve head with criminal indictment (2026-01-12)
- Interest.co.nz: Navigating the Trump-Powell feud (2026-01-17)
- 1News: Peters calls out RBNZ boss over backing of Fed chair amid Trump clash (2026-02-16)
- Newsroom: Oi Guv! Peters unusually plain-spoken on Trump crisis (2026-01-15)
- RNZ: Winston Peters tells RBNZ governor Anna Breman to ‘stay in her New Zealand lane’ (2026-01-14)
- RNZ: RBNZ governor should have sought advice before signing letter of support for US Fed boss Jerome Powell (2026-01-19)
- BusinessDesk: RBNZ governor stresses need to protect central bank independence in the Trump era (2025-10-29)
- Stats NZ: Balance of payments and international investment position, year ended 31 March 2026 (2026-09-30)
- Treasury: Fortnightly Economic Indicators, 23 April 2026 (2026-04-23)
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