Equity markets continue to price in optimism that the Iran conflict may be nearing an end, even as it stretches past five weeks and Strait of Hormuz traffic remains at a standstill. On Friday, President Trump stated that "Iran plans to make an offer aimed at resolving U.S. demands," sending markets to new all-time highs.

Energy markets, however, remain cautious—and rightfully so. A significant development on Friday has gone largely unnoticed: the U.S. sanctioned a Chinese refinery along with roughly 40 shipping companies and vessels involved in transporting Iranian oil, particularly flows to and from China. That's a notable move heading into weekend talks.

This isn't the first time the Trump administration has targeted China's "teapot" refineries—typically smaller, privately operated facilities that nonetheless account for more than 20% of China's total refining capacity. What makes the current situation especially consequential is that roughly 80% of Iran's oil exports flow to China. If a deal isn't reached this weekend, and if one of the newly sanctioned vessels attempts to transit the Strait under the reported U.S. blockade, the confrontation potential rises sharply. Keep in mind, President Trump and Chinese President Xi Jinping are set to meet in Beijing on May 14 and 15, after a postponement in March.

Notably, the real pressure point—Chinese bank facilitation of these transactions—remains untouched. That looks like a deliberate off-ramp to avoid a broader confrontation.

The open question: would the U.S. stop a China-bound tanker, or worse, a Chinese-owned tanker, attempting to transit the Strait of Hormuz? We will know by this time next week I would imagine.

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