Oil has breached $US100 per barrel for the first time since Russia's 2022 invasion of Ukraine, with no clear resolution to the Middle Eastern conflict driving supply concerns. The escalation is now hitting Australian markets and beyond as investors grapple with the likelihood of prolonged energy disruption.
The S&P/ASX 200 dropped 1.3% to 8,629.00, reflecting broader weakness across global exchanges as traders reassess the risks of sustained high oil prices. The sell-off mirrors losses across Asia and Europe, where Japan's Nikkei 225 closed more than 5 percent lower and South Korea's KOSPI was down 6 percent.
The core issue remains the Strait of Hormuz, the narrow waterway through which about 20% of global oil supplies travel. The conflict has led to the suspension of about a fifth of global crude and natural gas supply, as Tehran targets ships in the vital Strait of Hormuz. Major producers including Saudi Arabia, Iraq, and the UAE have all curtailed output because their crude cannot safely leave the region.
With President Trump calling for Iran's "unconditional surrender" and Tehran appointing the son of assassinated Supreme Leader Ali Khamenei, Mojtaba Khamenei, to take his place, market confidence in a quick resolution has evaporated. Oxford Economics reported that the swings in Brent crude oil prices over recent days are eye-catching, with volatility likely to persist due to the absence of a timeline for when the conflict will de-escalate and the Strait will see traffic recover.
The economic implications extend far beyond energy markets. Oil and gas are raw materials for thousands of products, including fertilisers used in farming. Lower-income households, already struggling, face further erosion of their real spending power from surging energy prices, which could cause delinquencies in credit cards and auto loans.
Global authorities are attempting to cushion the blow. The International Energy Agency said Wednesday that its members would release a record amount of crude, 400 million barrels, from their stockpiles. However, such moves are short-term fixes and do not clear the long-term risks. Analysts have said that if the Strait of Hormuz remains closed, oil prices could jump to $150.
The volatility has created pressure on central banks. Because of the spike in oil prices, traders have pushed back forecasts for when the Fed could resume interest rate cuts, while President Donald Trump has been angrily calling for such cuts. That tension between fighting inflation and supporting economic growth will define market dynamics in the coming weeks.
For Australian investors and consumers, the immediate message is clear: until the Strait opens and regional tensions ease, oil markets will remain on edge. That will keep equity markets volatile and push borrowing costs higher at a time when households are already sensitive to cost pressures.