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The weak currency is lifting New Zealand inflation, and markets already expect the RBNZ to respond.
Investment bank analysts expect the Reserve Bank of New Zealand (RBNZ) to raise interest rates to steady the weak New Zealand dollar, and with hikes already in the price, a move would do little more than hold the currency where it is.
The currency's slide is now feeding inflation: a weaker kiwi raises the local cost of imports, and New Zealand buys all of its refined fuel from abroad, priced in U.S. dollars.
"We continue to see CPI inflation falling to 3.7% y/y in the September quarter, but now think inflation will rise to 4.2% in the December quarter. Higher global fuel prices and a weaker New Zealand dollar are driving these trends," says Westpac in a recent update.
ASB and Commonwealth Bank of Australia also forecast 4.2%, above the RBNZ's own September projection of 3.9% and well clear of its 1% to 3% target band.
A hike lifts the return on New Zealand dollar assets, drawing in capital that supports the currency and, in turn, slows import price inflation.
"The NZD trade weighted index (TWI) is now at levels not seen since 2011. That will almost certainly play into the RBNZ's October decision later this month, at which we expect a hike," says ANZ.
"Another rate hike by the RBNZ should lend support to the kiwi through year-end. Next year, however, headwinds are likely to re-emerge," says Commerzbank.
ING cut its NZD/USD forecasts after the RBNZ's dovish September decision left the currency less protected from the global backdrop, though it still judges the kiwi cheap against fair value.
The Fed Keeps the Dollar Ahead
The limit on any recovery is the interest rate gap: the RBNZ's Official Cash Rate sits at 2.75% against a Federal Reserve policy rate of 4.00% following September's hike.
A 25 basis point RBNZ hike would leave the kiwi yielding a full percentage point below the dollar, and UOB expects two more Fed hikes, taking U.S. rates to 4.50% by early 2027.
"With low FX volatility adding to the appeal of carry trades, which the USD has in spades but the NZD does not, and the AI-centric nature of investment flows also favouring the USD, we see the risks to our Kiwi forecasts remaining skewed to the downside for a little longer," says ANZ.
The RBNZ Must Hike for NZD to Stand Still
Money markets are meanwhile pregnant with anticipation; they price around 16 basis points of tightening for October and 34 basis points by December, so a hike is already built into the kiwi.
Delivering it would hold the currency steady, while a pause would leave those expectations unmet and expose the kiwi to a fresh leg lower.
Westpac expects a pause in October and a hike to 3% in December, the outcome that would test the currency most.
What happens beyond 2026 also matters. "Markets also price over 100 bps of further RBNZ hikes, which New Zealand's 5.6% unemployment argues against," says BCA Research, which has opened a long AUD/NZD trade that benefits if the RBNZ undershoots.
The pound to New Zealand dollar rate is at 2.3614, and a Bank of England hike on 5 November, priced at around 90%, would preserve sterling's yield advantage even if the RBNZ matches market expectations.
Stats NZ releases September quarter inflation on 22 October, and a firm print would make a pause on 28 October harder to justify, with NZD/USD at 0.5619 holding above its 2026 low at 0.5580.
