Hostilities between the United States and Iran resumed following President Trump's announcement that the ceasefire is over, according to CNBC. The conflict had been paused and has now entered a new phase of active engagement. This development came approximately 10 days after the ceasefire declaration ended, marking a significant deterioration of the diplomatic pause that mediators had sought to extend.
The renewed conflict directly affects global crude oil markets. WTI crude oil, the US benchmark contract, and USO, the US Oil Fund ETF that tracks WTI futures, are both connected to Iranian supply-disruption risk given Iran's role as a significant crude exporter. Gold, which functions as a safe-haven asset, and the VIX, the CBOE Volatility Index measuring implied volatility in US equity markets, are each linked to the broader geopolitical risk premium that active US-Iran hostilities generate.
The escalation followed a period in which mediators had proposed a 10-day cessation of strikes to facilitate nuclear deal negotiations, with Iranian officials having signalled openness to diplomacy as recently as 20 July 2026. That proposal had temporarily improved risk sentiment and caused oil prices to decline from earlier military-escalation-driven highs, according to Finnhub. The subsequent collapse of the ceasefire reverses that diplomatic backdrop.
Sources: Cnbc TOP, investinglive.com, news.google.com