Samso Market Update: ASX retreats to a two-month low; Higher Oil Tests Market Confidence

Tuesday, September 15, 2026 | 12 pm AEST

The modest decline flagged before the opening bell developed into a more substantial retreat by midday, with the ASX 200 falling 76.4 points, or 0.87%, to 8,673.50 - as ASX retreats to a two-month low. The index had found little sustained buying support throughout the morning.

However, the weakness was uneven. The Small Ordinaries slipped just 0.12% to 3,343.10, outperforming the main index by approximately 0.75 percentage points, while several sectors remained positive.

The international backdrop helps explain the cautious mood. Continued disruption to Saudi Arabia’s East-West pipeline, an important alternative to shipping through the Strait of Hormuz, kept oil supply and inflation concerns in focus. For Australian businesses, the implications extend through diesel, freight and operating costs, particularly if the interruption persists.

Those pressures arrive alongside higher bond yields and expectations of a Federal Reserve rate increase. Questions surrounding the pace of AI development have also unsettled technology investors, adding to the uncertainty over growth expectations and valuations.

Interestingly, Information Technology and Healthcare showed the strongest positive sector readings locally, with Consumer Discretionary, Consumer Staples and Communication Services also positive. Technology’s resilience suggested the overnight AI concerns were not translating into uniform selling across the Australian market.

Against that, Materials, Financials, Energy, Industrials, Utilities and Real Estate were negative. Weakness in Materials and Financials was particularly relevant to the headline index, given their substantial representation, while Energy’s decline showed that stronger oil was not delivering an automatic lift to producers’ shares.

The commodity backdrop reinforced that uneven picture. At the September 14 close, WTI was positive across the daily, weekly and monthly periods, while silver, gold, palladium, platinum, copper, nickel, lead, tin and zinc recorded daily declines. Tin and zinc showed particularly pronounced weakness, and copper was lower across all three shorter periods. Nevertheless, copper, tin, zinc and silver remained positive over one year.

Brent crude rose 1.6% to US$106.30 a barrel, while West Texas Intermediate gained 1.9% to US$101.94.

Within small caps, LMG gained 70% on 26.13 million shares, PNT rose 40% on 11.86 million, and CVB advanced 30% on 8.87 million. SLB added 19.61% and CYB gained 19.05%. BP8’s displayed 1,233.33% rise came on only 33,000 shares.

The other side was equally sharp: IBR fell 44.44%, CGR lost 39.19%, ROG declined 33.33%, BRY dropped 31.58%, RPM fell 26.67% and OVT lost 25%. ROG traded 275.12 million shares as its price fell 0.1 cents.

For me, the important distinction is that a weak ASX 200 has not meant weakness everywhere. Smaller companies and several sectors have held up better, making the distribution of buying and selling more informative than the headline decline alone.

Monday’s market offered a few clues for ASX

Tuesday, September 15, 2026 | 9:30 am AEST

The ASX 200 finished Monday up 8.7 points at 8,749.90, while the All Ordinaries added 3.7 points to 8,923.90. It was a small improvement, with healthcare and consumer staples providing support as the major miners moved lower.

CSL, ResMed and Pro Medicus advanced, while Woolworths, Coles and A2 Milk helped the consumer staples sector. Weakness in BHP, Rio Tinto and Fortescue offset much of that progress.

There were also individual company developments to keep investors occupied. Cleanaway gained following a takeover proposal from EQT Infrastructure, while Telix Pharmaceuticals advanced on news of US Food and Drug Administration approval for its Pixclara brain-cancer imaging product.

These are useful reminders that company announcements can still drive share prices when the broader market lacks direction. The challenge is understanding whether an announcement changes the business’s earnings outlook, funding position or development pathway—and how much of that improvement the share price already reflects.

Wall Street reassesses the AI trade

US markets finished lower as calls from technology industry leaders for a coordinated slowdown in AI development introduced another uncertainty into the sector.

The Dow Jones fell 0.3% to 52,421.20, the S&P 500 declined 0.5% to 7,619.98 and the Nasdaq lost 0.6% to 26,186.41. Nvidia dropped 3.4%, while Corning, Teradyne and Coherent recorded double-digit declines.

However, the market recovered from its opening lows, and more S&P 500 companies ultimately advanced than declined. Cybersecurity stocks were particularly strong, with CrowdStrike and Palo Alto Networks rising sharply. Autodesk, Intuit and Adobe also recovered ground.

I would be careful about reading this as a single verdict on technology. The dispersion suggests investors are reassessing where the spending will go, which businesses may benefit and what valuations they are prepared to support.

For ASX investors following the AI theme, the useful questions remain quite practical: who is paying for the product, how much revenue is being generated, and what will it cost to deliver that growth? Those questions become more pressing when the cost of capital rises.

Oil is feeding into the interest-rate discussion

Brent crude rose 1.6% to US$106.30 a barrel, while West Texas Intermediate gained 1.9% to US$101.94. The advance followed reports that Saudi Arabia’s East-West pipeline could remain closed for several weeks after an attack.

The pipeline’s role in bypassing the Strait of Hormuz makes the disruption significant. Markets are having to assess both the immediate interruption and the reliability of alternative transport routes.

For Australian resources companies, higher oil has different consequences depending on the business. Oil producers may benefit from stronger realised prices, although hedging and operating performance influence how much reaches the accounts. Miners face potential pressure through diesel, freight and contractor costs.

This is where I would spend time reading the operating numbers. A stronger selling price for one commodity does not automatically protect a company from rising costs elsewhere.

The inflation implications are also keeping bond markets alert. The US 10-year Treasury yield briefly exceeded 5% before finishing at 4.99%, while the two-year yield rose to 4.66%. The supplied market pricing points to an almost fully anticipated Federal Reserve rate increase this week, with further increases expected through 2026 and 2027.

The Fed’s decision is due early Thursday AEST. Its explanation of the inflation outlook may prove just as influential as the decision itself.

Resources investors have China to watch

Gold fell 1.1% to around US$4,300 an ounce, copper declined 1.7% to US$14,001 a tonne, and iron ore slipped 1% to US$95.80. Thermal coal edged higher to US$148.55 a tonne, while coking coal was unchanged at US$271.

The Australian dollar also weakened to around US71.39 cents. A softer currency can support Australian-dollar revenue for exporters selling in US dollars, although imported equipment and other foreign-currency costs can offset part of that benefit.

China’s August retail sales, industrial production and fixed-asset investment figures are today’s key releases for the resources sector. I will be watching what they suggest about underlying activity and demand, particularly for steelmaking materials and industrial metals.

Samso Concluding Comments

My focus this morning is on how higher energy costs and more expensive capital flow through to individual businesses. The market can spend a great deal of time debating the next central-bank decision, but companies still have to fund their activities, manage costs and deliver on their plans.

For the smaller ASX companies, I would keep coming back to cash, upcoming expenditure and the next meaningful milestone. A worthwhile asset can still be a difficult investment if shareholders face repeated dilution before its value becomes clearer.

There is no need to draw a sweeping conclusion from one weaker session. There is good reason, however, to revisit the assumptions behind a valuation when oil, interest rates and market expectations are moving together.