Brent Crude Hits $109 as Iran Escalation Threat Lifts Oil, Yields

Key arguments

• Iranian officials signaled readiness to escalate conflict if US attacks continue, increasing risk of prolonged Middle East tensions.
• Oil prices surged to highest since May on supply concerns, with Brent up 7.7% to US$109/bbl and WTI up 8.1% to US$104/bbl.
• Rising oil prices and inflation concerns pushed global bond yields sharply higher, with US 2-year Treasury yield up 16bps.
• ECB delivered a widely expected 25bp rate hike, citing inflation risks skewed to the upside and energy price pressures from Middle East and Russia-Ukraine conflicts.
• USD strengthened ahead of US CPI release as markets raised Fed tightening expectations; DXY up 0.3%.
• Copper fell 3.6% on reports that a proposed US tariff on the metal had stalled due to inflation and manufacturing concerns.

Corresponding source evidence

1. 1 MORNING REPORT 11 September 2026 Key themes Iranian officials warned they were prepared to escalate the conflict should US attacks continue, fuelling concerns that tensions could become more prolonged and driving oil prices and global bond yields higher. · September 2026
2. US Treasury yields rose sharply as markets increased expectations for further Fed tightening, with today’s US CPI release expected to provide an important test of the policy outlook.
3. Oil prices surged to their highest level since May, while copper posted a sharp decline amid reports a proposed US tariff had stalled over concerns around inflation and the potential impact on US manufacturing.