WTI crude crossed $100 for the first time since last week's Hormuz exchange of fire, and Brent touched $107.58, as three developments stacked on top of yesterday's failed fourth-round talks: the US Navy turned back a Greek tanker carrying Iraqi crude at the blockade line, China ordered domestic companies to ignore new US sanctions on Iranian oil buyers, and Trump described the ceasefire as being on "massive life support."
WTI gained 3.3% to $101.37. Brent gained 3.2% to $107.58. The peace-deal premium that had been holding prices in the $97-$104 range through last week has fully unwound.
The Greek Tanker
The most significant new development is operational. A Greek-flagged supertanker carrying Iraqi crude, cleared for transit by Iran and carrying a full manifest of non-sanctioned oil from a non-sanctioned exporter, was turned back at the US Navy's blockade perimeter on Tuesday.
It is the first confirmed case of a non-Iranian, non-sanctioned vessel being blocked. Every previous US interdiction targeted ships with Iranian cargo, Iranian ownership, or sanctioned operators. A ship carrying Iraqi oil on behalf of a Greek company falls into none of those categories.
The US has not publicly explained the legal basis for the interdiction. CENTCOM has not commented. The development matters because it signals that the blockade may be expanding from a targeted sanctions-enforcement posture toward something closer to a general closure, which is what Iran has been claiming since February.
Lloyd's of London, which covers a large share of the global tanker fleet, is reviewing its Hormuz exposure in light of Tuesday's interdiction. If commercial underwriters pull coverage, ships that would otherwise attempt transit cannot do so regardless of US or Iranian permission.
What Trump Said
Trump, speaking in Riyadh on the first leg of his Middle East trip, called Iran's counteroffer "garbage" and described the ceasefire as being on "massive life support, where the doctor walks in and says your loved one has approximately a 1% chance of living." Iran's parliamentary speaker responded that the US has "no alternative but to accept" Tehran's proposal.
No fifth round of talks has been announced. The fourth-round agreement to meet again remains technically open, but neither side has set a date.
China's Move
Treasury sanctioned 12 entities on May 11 for facilitating Iranian oil sales to China. China responded Tuesday by formally ordering domestic firms to ignore the sanctions — a posture Beijing has effectively maintained for years, but not one it has ever stated explicitly as official policy.
The timing is pointed. Trump meets Xi in Beijing later this week. The explicit order to ignore US secondary sanctions is Beijing signaling, before that meeting, that it does not intend to cut Iranian oil purchases as a bargaining chip.
Iran accounts for roughly 13% of China's oil imports. China absorbs more than 90% of Iran's crude exports. If that channel closes, Iran loses its main revenue stream and its leverage in negotiations collapses. Beijing knows this. So does Washington.
The Trump-Xi meeting is now the most important near-term catalyst for oil prices. If Beijing shows any willingness to restrict Iranian oil purchases, deal pressure on Tehran increases and prices come down. If Beijing holds its current position publicly, the sanctions regime loses credibility and prices likely push higher.
Saudi Aramco's Warning
Saudi Aramco CEO Amin Nasser said publicly Tuesday that the market is losing roughly 100 million barrels of supply per week and that normalization of Hormuz traffic could slip into 2027 if the conflict extends through the summer. That timeline, if accurate, is longer than most analyst base cases and would imply sustained above-$100 prices for months rather than weeks.
Aramco's stated production capacity is above 12 million barrels per day. The practical problem is that most of Saudi Arabia's export terminals route through or near Hormuz. Capacity that cannot reach a tanker does not relieve the market.
Where Prices Go From Here
The range the market has been trading since the April 8 ceasefire, roughly $97 to $111, is being tested from the top again. The floor is structural supply loss. The ceiling is the point at which demand destruction and strategic reserve releases start to matter.
The Greek tanker incident and China's sanctions defiance both push prices toward the upper end of that range. The Trump-Xi meeting, expected later this week, is the next binary event. A signal of Chinese cooperation on Iranian pressure sends prices lower. A breakdown or Beijing stonewalling sends them higher.
This article is for informational purposes only and does not constitute financial or investment advice. Oil market conditions can change rapidly. Consult a qualified financial professional before making investment decisions.