Australian Shares Fall 0.7% as US-Iran Peace Prospects Fade and Oil Holds Near $95

Australian shares closed lower on June 5, 2026, as fading US-Iran peace prospects sent risk appetite retreating across the Asia-Pacific region. The S&P/ASX 200 finished at 8,622.6, down 63.5 points or 0.73%, trading within an intraday range of 8,613.6 to 8,705.1. The index’s 52-week range spans 8,262.4 to 9,202.9, with year-to-date performance remaining modestly negative at -0.9% as of the June 5 close. 

Two forces drove the session lower: miners retreating on iron ore weakness and the RBA’s cash rate now sitting at 4.35%, its highest level since December 2011 after three consecutive hikes in 2026. Oil near $95 per barrel kept energy stocks mixed and inflation fears firmly on the table. 

Miners and Banks Lead the Decline

Mining stocks bore the brunt of the selling on June 5. Major iron ore producers retreated as the steelmaking ingredient slipped toward two-month lows around US$102 per tonne, pressured by increased supply expectations from projects including Guinea’s Simandou. 

The session’s key movers on the downside:

• BHP Group (ASX: BHP): Notable decliner; materials sector weighted heavily on the index
• Rio Tinto (ASX: RIO): Fell alongside BHP as iron ore hit $102/tonne
• Fortescue (ASX: FMG): Down with the broader iron ore complex
• Commonwealth Bank (ASX: CBA): Financials sector dragged by rate sensitivity
• Woodside Energy (ASX: WDS):  Mixed; the energy sector is caught between oil benefits and rate pressure

The materials sector’s weakness aligned with softer commodity prices overall. Iron ore has faced headwinds from global supply dynamics, even as longer-term demand from China remains a key variable for Australian exporters. 

The Iran-Oil Equation Driving Sentiment

The Iran conflict has been the single most persistent macro overhang on Australian shares since February 28, 2026.

Brent crude for July delivery was trading at $103.69 per barrel, up from approximately $70 before the Iran war began, and having briefly spiked to nearly $120 at peak escalation. The near-$95 Brent level on June 5 represents a fragile middle ground high enough to sustain inflation pressure, not high enough to trigger the next leg of safe-haven selling.

What the RBA Has Done So Far

The RBA hiked rates at its February 2026 meeting by 25bps to 3.85%, then again in March by 25bps, and delivered a third consecutive hike in May, lifting the official cash rate to 4.35%, matching its highest level since December 2011. Trimmed mean inflation, the RBA’s preferred gauge, rose to 3.4% for the 12 months to April 2026, up from 3.3% the prior month. That single data point justifies the RBA’s continued hawkish posture and keeps the door open for a fourth hike at the June 16 meeting. 

Sector Snapshot: June 5, 2026

Sector	Direction	Key Driver
Materials	Down	Iron ore at $102/tonne, Simandou supply
Financials	Down	RBA rate sensitivity, credit caution
Energy	Mixed	Oil near $95; Woodside, Santos split
Consumer Discretionary	Down	Rate pressure on household spending
Healthcare	Flat	Defensive positioning

The RBA faces a genuine policy dilemma heading into June 16: headline CPI remains sticky above the 3% upper band, yet Australia’s Q1 2026 GDP print of +0.3% QoQ confirms the economy is slowing. AUD/USD at 0.7183 is the key cross-asset signal; a break below 0.7080 would likely pull the ASX 200 toward the 8,350–8,400 support zone. 

Australia’s export-oriented economy faces a specific dual pressure that peers like Japan and South Korea do not share in the same way: iron ore weakness and energy cost inflation are hitting simultaneously. BHP, Rio Tinto, and Fortescue together account for over 12% of the ASX 200 weight. When iron ore slides, the index slides with it. Track the ASX 200 live at asx.com.au and RBA policy updates at rba.gov.au ahead of the June 16 rate decision.

Disclaimer

The content shared by Meyka AI PTY LTD is solely for research and informational purposes. Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.