The EU endorsed U.S. sanctions on Iran amid G20 talks; enforcement remains unstated and the path to oil flows is unconfirmed.
What moved
The EU endorsed U.S. sanctions on Iran amid G20 talks; enforcement remains unstated and the path to oil flows is unconfirmed.
The market transmission
Sanctions announcements do not automatically translate into enforcement or supply disruption. The signal names an endorsement in principle, not a dated policy shift, a specific target list, or a timeline. South Korea's Hormuz deployment consideration is a separate naval posture and carries no direct commodity consequence on its own. Oil markets will price enforcement action, not statements of intent.
What would change this
The EU endorsement is political alignment, not market action. Sanctions designated are not sanctions enforced; enforcement against Iran's oil sector depends on secondary sanctions reach, shipping compliance, and insurance market behavior, none of which the signal addresses. Hormuz transits have not changed. An announcement of intent weeks or months ahead of implementation moves markets far less than the implementation itself.