AUD/JPY Supported by RBA Hike, but Yen Intervention Risk Caps Upside

Quick Take

AUD/JPY still has a supportive rate story, but the risk balance is no longer one-sided. The Reserve Bank of Australia raised its cash rate to 4.35% on 5 May, giving the Australian dollar a stronger yield base, while the Bank of Japan is still holding rates at 0.75%. That keeps the carry argument alive, but Japan’s latest intervention warnings mean traders can no longer ignore downside headline risk in yen crosses.

What Is Supporting AUD/JPY

The main support comes from the Australia-Japan rate gap. Reuters reported that the RBA lifted rates by 25 basis points to 4.35%, its third hike this year, after warning that inflation would remain sticky because of the global oil shock linked to the Middle East conflict.

For AUD/JPY, that matters because a higher Australian cash rate makes the Aussie more attractive in carry trades. When Japan’s policy rate remains much lower, traders still have an incentive to fund positions in yen and hold higher-yielding currencies such as the Australian dollar.

Why the RBA Hike Was Not Purely Bullish

The RBA decision was hawkish, but not cleanly positive for risk. Reuters reported that Governor Michele Bullock said policy is now “slightly restrictive,” giving the central bank room to pause and monitor inflation and growth risks. Markets also scaled back the odds of another near-term hike, with only about a 15% chance of a June move priced after the decision.

That means AUD/JPY is supported by the rate differential, but the Aussie is not getting unlimited fuel from the RBA. The central bank is tightening because inflation risk has worsened, not because the growth outlook is especially strong.

Why the Yen Side Is Becoming More Dangerous

The yen remains under pressure, but intervention risk has clearly risen. Reuters reported that Japan appeared to have stepped into the market last week, with money market data pointing to roughly $35 billion of yen-buying behind a sudden 3% rally in the currency. Japan’s finance minister then warned again that authorities would take decisive action against speculative FX moves.

This is important for AUD/JPY because yen crosses can fall quickly when traders are forced to unwind carry positions. Even if intervention does not fully reverse yen weakness, it can still trigger sharp short-term pullbacks.

BOJ Policy Is Also Less Dovish Than Before

The BOJ is still cautious, but it is no longer completely united. Reuters reported that the central bank kept rates steady at 0.75%, but three of the nine board members wanted a hike to 1.0%, signalling rising concern over inflation pressure from the Middle East conflict.

That gives yen bears a warning. The BOJ has not moved yet, but internal pressure for tighter policy is increasing. If markets start to price a June hike more seriously, AUD/JPY could lose part of its carry support quickly.

Near-Term View

My near-term view is that AUD/JPY can stay supported while the RBA remains tighter than the BOJ and the market continues to favour carry trades. But the upside is likely to be more uneven from here. Japan’s intervention risk, BOJ dissent, and oil-driven uncertainty all make high-level breakouts harder to sustain.

Conclusion

The main point is simple: AUD/JPY still has yield support, but the yen side is becoming unstable. The RBA hike keeps the Australian dollar attractive, yet Japanese authorities are now actively pushing back against excessive yen weakness. That makes AUD/JPY a supported pair, but no longer an easy one-way carry trade.