Escalating Middle East tensions drove the dominant macro narrative Tuesday, with the US launching strikes on Iranian oil tankers and Houthi forces attacking Saudi energy sites, pushing Brent crude to close at $97.92 per barrel and extend further above $100 in after-hours trade. The oil spike revived inflation concerns at a critical juncture, with the 10-year US Treasury yield closing at 4.78–4.805%, its highest since 2023, and Fed funds futures now pricing approximately 58–60% odds of a 25 basis point hike at the 15–16 September FOMC meeting — the final call before Thursday's PPI and Friday's CPI prints arrive. The yen surged to approach 153 per dollar on growing Bank of Japan rate-hike expectations, while the DXY softened 0.32%, reflecting diverging central bank paths across the G10. Risk sentiment turned broadly cautious, with the VIX rising 2.75% to 15.72 and the Nikkei VIX spiking an extraordinary 46.61% to 32.05, underscoring the rapid repricing of uncertainty across Asia-Pacific vol markets.
For Asia-Pacific markets opening Wednesday, the combination of oil above $100, elevated US yields, and a stronger yen creates a genuinely difficult cross-asset backdrop. Japanese exporters face margin compression from yen strength, as reflected in the Nikkei's 1.70% fall Tuesday, while ASX 200 energy and resources names may find partial support from commodity strength — crude oil up 1.69%, copper up 2.15%, iron ore up 0.45%, and aluminium up 1.26% — though broader index weakness of 1.00% to 8,920.8 signals that geopolitical risk aversion is dominating. Australian investors should note that RBA officials Hunter and Hauser reinforced an inflation-priority stance and left the door open to further rate hikes, adding a domestic overlay to global tightening pressures. President Trump is scheduled to speak at 21:15 ET, which falls during the Asian session open, carrying medium-impact headline risk given the active Middle East situation.