Escalating military tensions between the United States and Iran have sent shockwaves through global commodity markets and rippled into Australia’s domestic sharemarket, leaving the benchmark ASX 200 in negative territory on Wednesday, with sharp divergence across key industry sectors. Fresh military action that began on Tuesday, when U.S. Central Command launched targeted air strikes against Iranian sites along the country’s coastline, has amplified uncertainty in the already volatile Middle East, a region that controls a large share of global oil transit through the critical Strait of Hormuz.
In a public statement posted to the social platform X, U.S. Central Command framed the strikes as a response to recent Iranian attacks on commercial shipping vessels carrying civilian crews in international waters, noting the operation was designed to impose clear costs for Tehran’s actions. A senior U.S. official confirmed Iran launched retaliatory strikes following the initial U.S. assault, creating a dangerous cycle of tit-for-tat violence that threatens regional stability.
The escalation immediately impacted global energy markets, pushing Brent Crude prices up to a two-week high of $76.58 per barrel. This sharp uptick in oil prices triggered mixed reactions across Australia’s benchmark index, which ended the trading session in the red despite a partial recovery from a deeper morning slump. The ASX 200 closed 18.80 points lower, a 0.21% drop that landed it at 8785.10, while the broader All Ordinaries index fell 25.40 points, or 0.28%, to settle at 8979.30. Against the U.S. dollar, the Australian dollar rallied to 69.36 U.S. cents by market close.
Against the overall market downturn, six of the ASX 200’s 11 industry sectors closed in positive territory, led by energy stocks that benefited directly from the rising crude prices. Major Australian energy producers posted double-digit and solid single-digit gains: Woodside Energy rose 3.22% to close at $28.87, Santos climbed 5.78% to $7.50, and fuel retailer Ampol gained 1.37% to finish at $34.78. Consumer staples were another bright spot for the market: supermarket chain Woolworths rose 1.22% to $39.90, rival Coles added 0.39% to $23.41, and drinks and hospitality operator Endeavour Group jumped 1.79% to $3.51.
These sector gains were more than offset by steep declines across mining and materials stocks, driven by falling commodity prices and investor jitters over prolonged high global interest rates. BHP Group shares fell 2.31% to $57.51, Rio Tinto dropped 2.55% to $163.85, and only Fortescue Metals bucked the trend with a tiny 0.11% gain to $18.40. Gold mining stocks also slumped as rising oil prices stoked fears that central banks would keep interest rates higher for longer, a trend that typically weighs on non-yielding assets like gold. Northern Star Resources fell 1.69% to $20.31, Evolution Mining dropped 4.19% to $11.44, and Newmont lost 1.04% to $136.18.
Tony Sycamore, senior market analyst at IG, explained that the latest conflict grows out of a long-standing unresolved dispute over sovereignty of the Strait of Hormuz, a chokepoint through which roughly 20% of global oil supplies pass each day. “Iran maintains that parts of the Strait fall within its territorial waters and that it exercises sovereignty over them, while the US position was that the Strait is an international waterway with rights of transit passage for all nations,” Sycamore said. “This fundamental difference in interpretation was never fully resolved in the text of any agreement.”
Beyond the geopolitical-driven volatility, several individual companies dragged on the index through company-specific events. Telecom giant Telstra saw its shares drop 2.96% to $4.92 following a nationwide network outage that disrupted more than 24.9 million mobile services, interrupted business payment systems, and shut down public transport networks across multiple Australian states. Furniture retailer Adairs fell 1.34% to $1.47 after it flagged a non-cash impairment charge of up to $60 million and projected a statutory after-tax net loss of roughly $43 million. Medical device company ResMed slipped 0.80% to $31.19 after announcing it had agreed to sell its MatrixCare software business to Frazer Healthcare Partners for $490 million U.S.