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CNBC reports that the Brent Crude oil price declined by 21% during June 2026, its largest monthly decline
2026 Iran war fuel crisis — CNBC reports that the Brent Crude oil price declined by 21% during June 2026, its largest monthly decline since March 2020, amidst the ongoing negotiations between Iran and the Uni

Context: 2026 Iran war fuel crisis.
CNBC reports that the Brent Crude oil price declined by 21% during June 2026, its largest monthly decline since March 2020, amidst the ongoing negotiations between Iran and the United States. [https://www.cnbc.com/2026/06/30/oil-prices-brent-wti-crude-trump-iran.html (CNBC)]
Event summary via Wikipedia Current Events (2026-06-30).