AUD hit 1.1265 against the NZD on 23 September. The pair has averaged about 1.0954 this year, up roughly 1.86% on 2024. Traders point to central bank policy gaps as the main driver.

Why the Aussie climbed

The Aussie has outperformed the Kiwi mainly because interest rates diverged — the RBA sits at about 3.60% while the RBNZ is near 3.0%. The Reserve Bank of Australia (RBA), Australia's central bank, has eased policy more cautiously in 2025, trimming its cash rate by around 80 basis points to 3.60%, while the Reserve Bank of New Zealand (RBNZ), New Zealand's central bank, has delivered deeper cuts — roughly 175 basis points so far — taking its official cash rate to 3.0%.

That spread matters — it was roughly 60 basis points in August, and it drives carry flows. A higher yield on Australian assets versus New Zealand ones makes the AUD more attractive to carry‑trade players and yield hunters. Many investors have been borrowing NZD and buying Australian assets to harvest the yield, which helped lift AUD/NZD this year.

The upmove has shown moments of speed and moments of stall. The rate reached 1.1265 on 23 September and averaged about 1.0954 across 2025, roughly a 1.86% uptick on 2024 levels, according to market summaries compiled by AInvest.

Price action's been choppy — traders mark resistance around 1.1050, though some models still suggest a run into the low 1.13s if momentum continues.

But the policy story isn't just about raw numbers. The RBA's approach has been driven by a desire to balance inflation and the labour market, even as growth forecasts were revised lower — the RBA trimmed its 2025 GDP outlook to about 1.7% in its public commentary. The RBNZ, meanwhile, cited weaker domestic demand, global uncertainties and political pressure to stimulate activity when it loosened policy more aggressively.

Carry trades and where the risks lie

Right now, carry strategies are straightforward when rates diverge: borrow NZD, invest in AUD. By August 2025 the spread sat at roughly 60 basis points in favour of Australian cash, creating a clear incentive for that exact trade. Such flows can exaggerate moves.

That said, carry trades aren't risk‑free. Currency risk can wipe out yield benefits quickly. If global risk appetite retreats, or if markets re‑price central‑bank paths, positions can reverse fast. Trading Economics and other market commentators have warned that volatility and sudden stop‑outs are the main hazards for levered carry bets.

Mastheads

Funding strains are another factor. Shorting NZD to buy AUD runs into liquidity and margin costs, especially during times of stress. The same forces that help push AUD up — momentum flows, hedge funds piling into carry, local institutional moves — can flip and accelerate losses when traders unwind.

Technical picture and strategist views

Technicians point to a choppy uptrend. Invezz highlighted the recent pattern of higher lows and said a so‑called ‘golden cross’ may be forming on some indicators — a signal that often attracts momentum buyers. Price action around 1.1050 is getting attention because several models peg it as short‑term resistance; a decisive break above there could open the way to the 1.13 area.

Yet strategists are cautious. A number of desk notes shared with market clients flag the rally as narrow — driven mainly by rate differentials rather than broad macro divergence — and therefore vulnerable to reversal. If the RBA resumes easing at a faster clip, or if the RBNZ pauses after its heavy cuts, the yield incentive could evaporate.

Desks are running scenarios now, testing how AUD/NZD would react if central‑bank guidance or global risk appetite shifts. In the downside case, a global risk aversion episode would likely see AUD fall back faster than NZD because Australia is more sensitive to global commodity cycles and Chinese demand. In the upside case, further NZ‑rate cuts or fresh data showing New Zealand's activity weakening could push AUD/NZD higher, especially if commodity prices firm and Australian yields remain comparatively attractive.

Macro and market implications

For portfolio managers the questions are practical: how much of the move is carry‑funded, and how big is the crowding? If lots of positions are levered, a small nudge can force oversized moves. Liquidity in the NZD market is thinner than in many major currencies; that exaggerates swings. Major FX desks and proprietary funds pay close attention to those crowding metrics.

Central banks' communication also matters. The RBA has emphasised data dependence when discussing further cuts, signalling an intent to tread carefully. The RBNZ has been more explicit about easing to support a two‑speed recovery in New Zealand. Those public lines feed into market pricing — futures, swap rates and forward points — and ultimately into FX flows.

Beyond carry, there are structural considerations. New Zealand's export mix and smaller financial markets mean its currency can be more sensitive to idiosyncratic shocks. Australia, with a larger bond market and deeper equity universe, tends to attract a wider range of foreign capital in search of yield. That combination has helped explain why AUD/NZD has been biased higher over the past year.

What traders should watch next

Shorter term, look for data and central‑bank commentary to move the dial. Employment and inflation prints from both countries will be front of mind. If the RBA softens language on the path for rates, AUD could slip quickly. If the RBNZ signals that it sees room to pause, NZD might recover some ground.

Market pricing in swap curves and OIS markets will show whether the rate spreads are durable. Options markets — especially skews and term‑structure of implied volatility — can reveal where traders are hedging and whether they expect a one‑way move or two‑sided risk. Those are the plumbing signals professional players watch before committing sizable carry exposure.

For many investors the simpler takeaway is this: the carry proposition exists, but it's fragile. Momentum can keep the move alive. But crowded trades and shifting central‑bank rhetoric can reverse it fast. Managers who are long AUD via carry typically hedge some of the downside, keep position sizes tight, and run explicit stop rules to avoid being caught offside when flows unwind.

Finally, remember technical levels. Several teams have flagged 1.1050 as a near‑term pivot, with a break and hold above it opening the 1.12–1.13 window. If that doesn't happen, expect more choppiness around current levels rather than a clean trend extension.

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The Reserve Bank of New Zealand lowered its Official Cash Rate to 3.0% in August 2025.

This article was created with AI assistance.