Why is the ASX dropping? Rising bond yields and RBA warnings unravel the relief rally
The Australian sharemarket’s sharp reversal on Thursday, October 1, reflects a difficult combination: rising global borrowing costs, persistent inflation, concerns about expensive financial assets and company-specific setbacks.
By afternoon trading, the S&P/ASX 200 was down 157.4 points, or 1.79%, at 8,631.90, having fallen as low as 8,613.20. The decline had more than erased Wednesday’s 80-point advance (Figure 1).
The Reserve Bank’s latest Financial Stability Review brought those broader vulnerabilities into focus. It warned that global and operational risks are mounting, while maintaining that Australia’s financial system remains resilient.
For investors asking why ASX shares are falling, the explanation extends beyond the prospect of another Australian interest-rate increase. Long-term financing costs and the price investors are willing to pay for earnings are also changing.
Key highlights
Higher bond yields are pressuring equity valuations and increasing financing costs.
Wednesday’s inflation relief has faded, although the latest figures did temper expectations for another immediate RBA increase.
The RBA has highlighted global financial vulnerabilities, including risks associated with AI investment and borrowing.
Property and smaller companies remain exposed to tighter funding conditions.
Individual announcements are producing divergent outcomes, showing that the sell-off has several contributing factors.
Rising bond yields are the central pressure
The overnight increase in US Treasury yields provides an important explanation for the weaker Australian session.
The US 10-year yield reached approximately 5.29%, while the 30-year yield climbed to around 5.64%. Stronger economic activity and concerns about government borrowing helped sustain upward pressure on long-term yields despite a softer-than-expected US inflation reading.
Higher yields affect shares through both valuations and business costs.
When government bonds offer higher returns, investors generally require more compensation for holding equities. They may therefore pay less for the same expected stream of company earnings. Businesses also face higher financing costs when existing borrowing matures or new projects require funding.
This helps explain why Australian shares can weaken even when expectations for the next RBA meeting become less aggressive. International bond markets influence financial conditions independently of the domestic cash rate.
Why Wednesday’s rally did not last
Wednesday’s advance followed inflation figures that were less alarming than investors had feared.
Headline annual inflation increased to 4%, but underlying inflation remained at 3.6% for a third consecutive month. Money markets reduced the probability of a November rate increase, supporting a broad rally in which all 11 ASX sectors finished higher. ABC News
That improvement in expectations did not remove the existing burden of higher rates. The RBA had already lifted the cash rate to 4.60% on September 29, and inflation remained above its target range.
The distinction matters: a reduced likelihood of another near-term increase offers relief, but companies and households still operate under restrictive financial conditions.
Thursday’s reversal suggests that the improvement in domestic sentiment was insufficient to withstand renewed pressure from overseas borrowing costs.
What the RBA’s risk warning means for shares
The Financial Stability Review identified vulnerabilities that could amplify a shift in investor confidence.
The RBA highlighted low risk premiums in global equity and credit markets, increasing exposure to the AI investment boom, and growing use of borrowing to fund that investment. It also identified financing arrangements that can create less transparent connections between companies.
These concerns matter because highly valued assets can fall sharply if earnings expectations disappoint or investors reassess the risks they are accepting.
For the ASX, the potential transmission channels include weaker international markets, more expensive funding and reduced willingness to finance new developments. Australian companies do not need direct exposure to AI to be affected by a broad withdrawal from risk.
The review provides relevant context rather than proof that its publication caused Thursday’s decline. Selling was already evident during the morning.
The RBA also supplied an important counterbalance: Australian banks remain well positioned to lend through a downturn, and most mortgage borrowers retain capacity to manage more difficult conditions. RBA
Why property and small caps are vulnerable
Listed property was among the weaker areas, with the A-REIT index down 2.73% in the early-afternoon snapshot (Figure 2).
Property trusts face potential pressure from refinancing costs, the returns investors demand from rental income and changes in asset valuations. The effect varies according to debt maturity dates, hedging and rental growth.
Smaller companies can face similar financing pressures. Explorers, developers and emerging technology businesses often require additional capital before they generate sustainable cash flow. A lower share price can make an equity raising more dilutive, while expensive debt can reduce a project’s expected return.
The Small Ordinaries was down 1.68% at 3,311.90 in early-afternoon trading (Figure 3) was a substantial fall, although smaller than the ASX 200’s decline at the same stage. The weakness therefore extended across company sizes.
Company developments are adding to the volatility
Individual announcements also help explain why some shares have fallen much more sharply than the index.
Liontown Limited (ASX: LTR) was down 11.83% in early-afternoon trading, following approval of a $389 million Kathleen Valley expansion and increased capital expenditure guidance. The expansion offers production growth, but its spending requirements are relevant in a market increasingly sensitive to funding and execution risk. www.google.com
Elsewhere, Lynas Rare Earths Limited (ASX: LYC) fell 7.48%, while Meteoric Resources Limited (ASX: MEI) gained 47.06% after Lynas proposed an approximately $968 million all-share acquisition. Those early-afternoon moves illustrate how takeover terms can produce very different outcomes for buyers and targets.
Samso Concluding Comments
The ASX decline reflects pressure on the assumptions underpinning share valuations: borrowing costs, future earnings and access to capital.
The useful distinction for investors is between a falling share price and a deteriorating business. Cash reserves, refinancing obligations, project expenditure and earnings resilience help determine whether a company can withstand tighter conditions.
The RBA’s assessment supports that measured approach. Financial vulnerabilities are increasing, but Australia’s capacity to absorb shocks remains an important part of the picture.
The vocabulary, in plain English S&P/ASX 200 An index of the 200 largest companies listed on the ASX, weighted by market value. It is the most quoted measure of the Australian sharemarket. Bond yield The annual return an investor earns by buying a government bond at today's price and holding it until it matures. When bond prices fall, yields rise. US 10-year and 30-year Treasury yields The yields on US government bonds that mature in 10 and 30 years. They act as a benchmark for long-term borrowing costs around the world. Cash rate The interest rate the Reserve Bank of Australia sets on overnight loans between banks. It flows through to mortgage, business and deposit rates. Headline and underlying inflation Headline inflation is the change in prices across the whole basket of goods and services. Underlying inflation removes the most volatile price moves to show the trend. The RBA targets inflation of 2 to 3 per cent. Financial Stability Review A report the Reserve Bank publishes twice a year on the risks facing Australia's financial system. Risk premium The extra return investors demand for holding a riskier asset, such as shares or company debt, instead of a government bond. A low risk premium means investors are accepting less reward for the risk they take. A-REIT An Australian real estate investment trust. It is a listed fund that owns property such as offices, shopping centres or warehouses and pays out most of its rental income. Small Ordinaries The S&P/ASX Small Ordinaries index, which tracks the companies ranked 101 to 300 by market value. It is the standard measure of ASX small caps. Dilutive equity raising When a company issues new shares to raise money, each existing share owns a smaller part of the company. The lower the share price, the more new shares are needed to raise the same amount. |
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