Oil Tanks 4.5% as Tankers Resume Strait of Hormuz Transit

Crude oil prices dropped more than 4% on Wednesday after a growing number of tankers began openly passing through the Strait of Hormuz without turning off their transponders. WTI crude touched $70.30 a barrel, testing the $70.50–$71.00 support zone that had capped the downside since late April. Brent crude fell to $72.80, erasing all the price gains that followed the U.S. and Israel military operation against Iran earlier this year.

The shift in tanker behavior is the visible sign of a supply unwind that is running faster than the market expected. During the height of the Strait closure, vessels transiting the waterway disabled their transponders to avoid detection. Over the past 48 hours, shipping data showed more ships resuming normal signaling. The International Energy Agency estimated that the United Arab Emirates has already restored exports to 85% of pre-war levels. UAE formally left OPEC and OPEC+ on May 1, 2026, a move that had little market effect while the Strait remained closed. With the waterway reopening, the country can now ramp production without quota limits.

Why positioning made the selloff worse

The simple read is that more tankers mean more supply and lower prices. The 4.5% drop alone points to a positioning squeeze.

Hedge funds and commodity trading advisers had built large long positions in crude during the Strait disruption, betting the closure would persist through summer. The IEA export estimate caught many of those funds leaning the wrong way, traders said. The resulting liquidation amplified the selloff beyond what the fundamental supply change alone would justify.

A closer look at the IEA data reveals that UAE's export recovery is uneven across grades. Light sweet crude volumes have rebounded faster than medium-sour grades. Refiners set up for heavier Iranian or Iraqi grades may not benefit equally from the UAE ramp-up, even as headline supply numbers improve.

Extending the selloff

The downside extends if two conditions hold. First, the number of transiting tankers continues to rise over the next week with no increase in insurance premiums or military escorts. Second, UAE exports push past 90% of pre-war levels, signaling that post-OPEC production capacity is coming online faster than the market prices.

A weekly U.S. Energy Information Administration storage print with a larger-than-expected build would add conviction. The supply-side catalyst is the dominant driver for now.

Breaking the bear case

The downside weakens if U.S.-Iran negotiations stall on unresolved issues. Israel's operation against Hezbollah in Iran and Iran's demand to charge tolls for Strait passage remain open points. If either side walks away, the risk of re-escalation returns, and the supply premium would rebuild quickly.