Australia's 10-year government bond yield climbed 0.7% on Wednesday and reached a 15-year high of 5.223%, driven by a combination of domestic economic strength and renewed global inflation pressures.
Domestic data released for the second quarter showed the economy expanding 0.4% quarter-on-quarter, ahead of forecasts of 0.3%. Annual growth accelerated to 2.1%, compared with expectations of 1.8%. Those readings reinforced the view that activity remains resilient despite the Reserve Bank's efforts to curb demand.
In the immediate aftermath of the GDP report, markets raised the implied probability of a fourth RBA rate increase at the September meeting to 57% from 48%, while a November increase is described as now more than fully priced in.
That GDP result added to an already hawkish backdrop. July figures from the Australian Bureau of Statistics showed headline inflation slowing from 3.8% to 3.5%, but trimmed mean inflation - the measure most closely watched by the RBA - was unchanged at 3.6%, above the central bank's 2%-3% annual target range. The persistence of trimmed mean inflation helps explain why markets are tilting toward additional tightening.
Beyond domestic indicators, global developments intensified the move in yields. Escalating U.S.-Iran tensions and a sharp rise in oil prices increased inflation concerns across major economies, prompting a broader selloff in government bonds. Japanese, British, and U.S. government bond yields also rose, reflecting a common global impulse toward higher yields.
Market instruments recorded notable moves consistent with this risk-off environment. The S&P/ASX 200 traded lower, down 0.99% on the day, while oil futures jumped by 4.29%. Government yield proxies showed advances as well, with GB10YT=RR up 3.06%, US10YT=X up 0.33%, AU10YT=RR up 0.83%, and JP10YT=XX up 0.17%.
The combination of an above-consensus GDP result, sticky core inflation, a repricing toward a more hawkish RBA and a synchronized global bond selloff tied to oil-price shocks created a layered catalyst for the spike in Australian yields. Markets also increased the chance of an additional RBA tightening in Q1 2027 to 82% from 62%, indicating investors now anticipate a longer period of monetary policy tightening than previously expected. That expectation is likely to keep upward pressure on Australian yields beyond today's trading session.
Market context and implications
Higher yields typically increase borrowing costs and can weigh on rate-sensitive sectors such as property and consumer discretionary. The immediate reaction in equities and fixed income shows sensitivity to both domestic monetary policy expectations and international commodity-driven inflation shocks.