Chalmers: Global bond yield surge to strain Australian budget

Jim Chalmers' caution places fiscal strain alongside monetary tightening as a theme for Australian markets. Higher interest costs are expected to limit expenditure in the mid-year update. If deficits expand, an increasing debt servicing bill may heighten supply worries for Australian government bonds, sustaining upward pressure on longer-dated yields. The Australian yield curve is under pressure from both sides, given the RBA's hiking cycle and global yields at multi-decade peaks. Oil-driven inflation persists as a key risk; additional energy price increases would drive global yields higher and worsen the refinancing challenge Chalmers outlined.

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The previous day:

• Chalmers described the Iran war as an economic disaster and warned that climbing yields would cost billions

Earlier:

• Australian consumer confidence dropped following the RBA's rate increase, with Westpac forecasting another raise in November

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The global bond sell-off has now impacted Canberra. Chalmers cautioned that low-cost debt from yesterday is set to become a costly budget issue tomorrow.

Key points:

• Jim Chalmers cautioned that increasing global bond yields would add upward strain to the federal budget.
• He noted that maturing low-cost government debt would be swapped for more expensive borrowing.
• Before year-end, Chalmers plans to revise the national budget to account for elevated borrowing costs.
• He stated that the private sector is driving growth and called Australia's economic story positive, despite a persistent productivity issue.
• He also mentioned significant interest from Japan.

Australian Treasurer Jim Chalmers has cautioned that the spike in global bond yields will increase pressure on the federal budget. Low-cost government debt maturing in the next few years will be replaced with costlier borrowing.

In remarks on Tuesday, Chalmers stated that increased borrowing costs would appear in budgets globally, including Australia's. He pinpointed refinancing as a key pressure source, explaining that some low-cost government debt will be rolled over at markedly higher interest rates upon maturity. He indicated that he would revise the national budget before year-end to reflect the effect of higher borrowing costs.

Refinancing risk accumulates slowly, not all at once. Because governments continuously roll over maturing bonds, a prolonged yield increase raises interest costs annually as older, cheaper debt is replaced, mounting pressure on future budgets.

The caution arrives during a widespread global bond sell-off. Last week, US 10-year Treasury yields hit their highest mark since 2007, and European sovereign spreads have expanded significantly, with the French-German gap at its largest since 2012. Higher global yields generally pass through to Australian government bonds, increasing the Commonwealth's cost of new issuance.

Domestic monetary policy is compounding the pressure. The RBA recently lifted its cash rate to 4.6%, the highest since 2011, and some economists anticipate another rise in November.

Chalmers tried to offset the caution with a more optimistic economic outlook. He stated that the private sector is now driving growth and called Australia's economic narrative positive, while conceding the country's enduring productivity issue. He also mentioned what he referred to as a substantial and welcome degree of interest from Japan.

These remarks indicate that higher debt servicing costs will be a key focus of the mid-year budget update, possibly restricting the government's capacity for new spending or tax cuts while cost-of-living pressures affect households.