AUD/NZD trades down to 1.1600 by December 31, 2026 in the base case, 1.1380 in the bear case and 1.2100 in the bull case, driven by a 185-basis-point Reserve Bank of Australia (RBA) versus Reserve Bank of New Zealand (RBNZ) policy gap that has already peaked and is now set to compress.

AUD/NZD changed hands at 1.1948 on August 4, 2026 (European Central Bank daily reference rate), 2.6% below the 1.2265 print of May 26 that marked the highest level in a 12.5-year sample. The base case rests on one arithmetic fact: New Zealand’s annual inflation is now running at 4.1% against Australia’s 3.8%, yet New Zealand’s policy rate sits 185 basis points lower. The thesis breaks if any one of four signals fires, listed in the disconfirmation section.

Key Levels:

• AUD/NZD spot: 1.1948 — ECB euro reference rates, August 4, 2026; cross-checked at 1.1969 on an aggregated interbank feed at 00:02 UTC on August 5
• Base case target: 1.1600 by December 31, 2026 — rate-differential regression, Official Cash Rate (OCR) at 3.00%, RBA on hold at 4.35%
• Bull case target: 1.2100 — an RBA hike at the November meeting
• Bear case target: 1.1380 — the OCR reaching 3.25%, ASB Bank’s neutral estimate
• Major support: 1.1537 — 2026 year-to-date low, January 20
• Major resistance: 1.2265 — May 26 high, the highest daily close since December 2013
• Invalidation: weekly close above 1.2110 — the 100-session moving average

Methodology and what this analysis rests on

Spot and history come from the ECB’s daily euro reference rate series, cross-converted to AUD/NZD, covering 3,222 observations from December 31, 2013 to August 4, 2026, and cross-checked against a second independent interbank aggregator. Policy rates are taken from RBA and RBNZ primary communications, inflation and labour data from the Australian Bureau of Statistics (ABS) and Statistics New Zealand, and positioning from the Commodity Futures Trading Commission (CFTC) Commitments of Traders (COT) report, futures-only, as of July 28, 2026. Two caveats: the ECB series is a fixing rather than a tradeable rate, so it understates intraday extremes; and AUD/NZD is a historically mean-reverting cross, which makes any trend call on it structurally harder than the same call on a major.

The data: a record policy gap and a record short in the kiwi

The RBA lifted its cash rate three times in 2026 — February, March and May — from 3.60% to 4.35%, then held on June 16. The RBNZ did nothing until July 8, when it raised the OCR 25 basis points to 2.50%, its first increase in three years, by unanimous consensus. That sequencing is the story of the cross this year: AUD/NZD ran from 1.1604 on January 2 to 1.2265 on May 26 as the gap widened from 135 to 210 basis points, then rolled over once New Zealand moved.

Variable	Australia	New Zealand	Gap
Policy rate (Aug 5, 2026)	4.35%	2.50%	185 bp
Headline CPI, y/y	3.8%	4.1%	−30 bp
Unemployment rate	4.4%	5.6%	−120 bp
CFTC net non-commercial position	−39,964 lots	−47,668 lots	7,704 lots
Net position as % of open interest	−17.4%	−45.3%	27.9 pp
Weekly change in gross shorts	+3,914 lots	−3,949 lots	7,863 lots

Sources: RBA and RBNZ policy rates as at August 5, 2026; ABS CPI June quarter 2026 (July 29) and Labour Force June 2026; Statistics New Zealand CPI June quarter (July 20) and Household Labour Force Survey June quarter (August 5); CFTC Commitments of Traders, CME futures only, July 28, 2026.

The positioning line is the one most desks have not priced. Speculative accounts hold a net short of 47,668 New Zealand dollar contracts against open interest of just 105,128 — 45.3% of the entire market, one of the most lopsided readings in any Group of Ten (G10) currency. The comparable Australian dollar figure is 17.4%. In the week to July 28 those positions moved in opposite directions: traders added 3,914 gross Australian dollar shorts while covering 3,949 gross kiwi shorts. A cross carrying an extreme short on one leg and a rising short on the other has an asymmetric response function. Good New Zealand news forces covering into a thin market; good Australian news merely confirms an already-crowded view and buys little. That asymmetry is worth more to the downside case than the rate differential itself, because it converts each RBNZ surprise into a mechanical bid for the kiwi rather than a discretionary one.

“Where neutral is exactly is open to conjecture. But we can say with some certainty that it is not 2.5%.”

— Stephen Toplis, Head of Research, BNZ (interest.co.nz)

The mechanism: 185 basis points is a peak, not a plateau

Fit the cross to the policy gap using the only two clean observations 2026 offers. On January 2, with the gap at 135 basis points, AUD/NZD closed at 1.1604. On May 26, with the gap at 210 basis points, it closed at 1.2265. That is 661 pips for 75 basis points, or roughly 88 pips per 10 basis points of differential. Run today’s 185-basis-point gap through that line and it returns 1.2045. Spot is 1.1948 — some 97 pips, or 0.8%, below fair value on the contemporaneous gap. The market is already discounting compression it has not yet seen.

Now take the sell-side consensus for the OCR at end-2026. ANZ New Zealand, Westpac New Zealand and Kiwibank all forecast 3.00%; ASB forecasts 3.25%. Commonwealth Bank of Australia expects the RBA on hold at 4.35% for the rest of the year, and after the June-quarter Consumer Price Index (CPI) print money markets assign roughly a 4% probability to an August hike. At an OCR of 3.00% and an unchanged cash rate, the gap closes to 135 basis points — precisely the January configuration, which the regression maps to 1.1604. At 3.25% the gap is 110 basis points and the line returns 1.1384. Those two numbers are the base and bear cases.

What the model misses

Three things. First, the terms-of-trade leg runs the wrong way. Iron ore fell to $93.66/tonne on August 3, 2026, down 4.7% over the month and well below January’s $107–109/tonne range — an Australian dollar negative, but New Zealand’s export complex is weaker still. Global Dairy Trade event 407 on July 7 saw the index drop 4.9%, the largest fall in two years, with whole milk powder off 4.4% to $3,425/tonne. Second, a two-point regression is a line through two dots in a single regime, not a model. Third, spot sits 10.2% above the 1.0842 full-sample mean and only 3.3% of the 3,222 sessions since 2014 have closed above 1.19 — but a pair can stay in the top 3% of its distribution for a long time when the gap that put it there is real.

The strongest counter-argument is the labour market. New Zealand’s unemployment rate rose to 5.6% in the June quarter from 5.4%, with underutilisation up to 13.8% from 12.9%, while Australia’s held at 4.4% with 76,000 jobs added. A central bank tightening into a 5.6% jobless rate has limited room. If the OCR stops at 2.75%, the gap only reaches 160 basis points and the regression returns 1.1824 — a move barely worth the carry cost of being short.

“The Board is prepared to act as required to achieve its mandate, including by increasing the cash rate further if needed.”

— Michele Bullock, Governor, Reserve Bank of Australia, speaking in Sydney on July 28, 2026 (Reuters)

What would invalidate this call

The base case to 1.1600 breaks if any one of these four signals fires:

• The RBA raises the cash rate on August 11 or in November. A hike to 4.60% reopens the gap by 25 basis points and, on the regression, adds roughly 220 pips to the cross. Governor Bullock has explicitly kept the option live.
• New Zealand’s September-quarter CPI prints below 3.0%. The RBNZ’s own track has inflation easing to 3.3%; a print inside the 1–3% target band removes the urgency behind further hikes and caps the OCR at 2.75%.
• New Zealand’s unemployment rate rises through 6.0% in the September quarter. At that level the Monetary Policy Committee stops, and the compression the base case needs never arrives.
• AUD/NZD posts a weekly close above 1.2110. That is the 100-session moving average and the top of the July range; a close above it says the market has rejected the compression narrative.

What to watch next

Four dates carry most of the risk. August 11, 2026: the RBA decision and Statement on Monetary Policy — a hold is consensus and largely priced, so the forecast revisions matter more than the decision. September 2, 2026: the RBNZ Monetary Policy Statement, where ANZ and Westpac both expect the cycle’s second hike. October 28: the RBNZ Monetary Policy Review. December 9: the year’s final Monetary Policy Statement, and the last scheduled chance to reach 3.00%. Between them, watch weekly CFTC positioning for evidence the 45.3% kiwi short is unwinding.

Frequently asked questions

What is the current AUD/NZD rate?

AUD/NZD was 1.1948 on August 4, 2026 on the ECB daily reference fixing, cross-checked at 1.1969 on an independent interbank aggregator early on August 5. The pair is 2.6% below its May 26, 2026 high of 1.2265 and 3.6% above its year-to-date low of 1.1537, set on January 20.

Why is AUD/NZD so high by historical standards?

Because the RBA raised its cash rate three times in 2026 while the RBNZ was still on hold, opening a policy gap of up to 210 basis points. For most of the past decade New Zealand carried the higher policy rate, which is why the cross averaged 1.0842. The current configuration is a reversal of the historical norm, not a mispricing.

When do the RBA and RBNZ next meet?

The RBA Monetary Policy Board announces its next decision on August 11, 2026. The RBNZ’s next decision is the Monetary Policy Statement on September 2, 2026, followed by a Monetary Policy Review on October 28 and a Monetary Policy Statement on December 9.

How large is the forecast move in volatility terms?

The base case is a 2.9% decline over roughly five months. Sixty-day realised volatility is 5.2% annualised, which scales to about 3.4% over a five-month horizon. The target is therefore inside one standard deviation — a modest call, not an aggressive one.

Both legs of this cross have been covered separately: the Australian dollar’s energy-windfall case, the earlier RBA carry standoff, the RBNZ hike-cycle call and the hawkish-RBNZ and Fed-cut case. Primary data: ABS June-quarter CPI, ABS Labour Force, the RBNZ decision record, the RBA cash rate series and the CFTC Commitments of Traders report.

This article is informational analysis only and is not financial, investment, or trading advice. Foreign-exchange, commodity, and equity markets are highly volatile and can lose substantial value rapidly. Leveraged products carry total-loss risk and may exceed the initial margin posted. Past performance and historical correlations do not guarantee future results. Do your own research and consult a regulated financial adviser before making any investment decision.