Estimating the Hormuz disruption

Our Head of Public Policy Research Ariana Salvatore breaks down what’s being discussed by policymakers around the world to try to cap the oil price spike.  

Read more insights from Morgan Stanley.

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Welcome to Thoughts on the Market. I’m Ariana Salvatore, Head of Public Policy Research. 

Today, I’ll be talking about the ongoing conflict in Iran and the policy options to offset a rise in oil prices. 

It’s Wednesday, March 25th at 8pm in Tokyo. 

The U.S.-Iran conflict is stretching into its fourth week, and markets are still trying to distill headlines for news of an off-ramp or further escalation. Even here in Tokyo, the global supply crunch is top of mind. But we’re also watching for second order effects among a number of key supply chains, ranging from food to semiconductors. 

As you’ve been hearing on the show, the Middle East is a critical supplier of aluminum, petrochemicals, and fertilizers—all industries that are energy intensive and deeply embedded in global supply chains. There’s also sulphur, which is needed to produce copper and cobalt, largely used for chip materials and components. And helium, which is a critical material for semiconductor manufacturing. 

So with all this supply chain disruption on the line, what are policymakers’ options to mitigate that loss? 

Let’s start by putting some numbers around the disruption. The Strait of Hormuz accounts for about 20 percent of global oil supply, and about a third of seaborne oil. Our strategists highlight three potential offsets. First, alternative pipelines. Saudi Arabia maintains an East-West pipeline and the UAE similarly has a smaller scale Abu Dhabi Crude Oil Pipeline. Those together can allow for some crude to bypass Hormuz. 

Second, the U.S. has publicly discussed potential naval escorts. We’ve written about the logistical difficulties with this plan, in addition to significant execution risks. Third, the IEA has coordinated a strategic stock release, which could translate to a sustained release of around 2 million barrels a day, depending on the duration of the conflict. There are also geographic considerations though that can add a lag to those strategic releases. 

On net, our oil strategists think these policy levers can mitigate about 9 million barrels per day from the lost 20, meaning that the global economy will still be short about 11 million barrels per day; more than three times the supply shock the market feared from the Russia-Ukraine conflict back in 2022. 

So, given those limitations, we’re starting to see countries around the world – particularly in Asia – begin to implement rationing measures to conserve energy. The Philippines, for example, has implemented a four-day workweek for government workers and mandated agencies to cut fuel and electricity use. Myanmar has imposed driving limits, and Sri Lanka has introduced gasoline rationing. 

But what about in the U.S.? We’ve seen domestic gasoline prices climb due to this conflict, and the national average is now close to $4, almost a dollar up from where we were about a month ago. The President has announced a number of policy efforts – including a Jones Act waiver, which temporarily allows foreign vessels to transport fuel between U.S. ports, and a temporary pause on some Russian and Iranian oil sanctions. President Trump has also directed a release from the Strategic Petroleum Reserve, but similarly to the IEA stockpile, the flow rate is going to be the key limit. The authorization was for 172 million barrels over a 120 period, which translates to just about 1.4 million barrels per day on average. 

So what should we be watching? Tanker transits, signs of upstream shut-ins as storage fills, refinery run-cuts, and—most crucially—whether policy announcements on insurance and escorted convoys can actually translate into reality. These are all going to be critical elements going forward. 

For now, our oil strategists have raised their near-term Brent forecast to $110 per barrel, which underscores our U.S. economists’ outlook for weaker growth and stickier inflation than previously expected. And for now, policy tools seem to be unable to meaningfully offset that disruption. 

Thanks for listening. As a reminder, if you enjoy Thoughts on the Market, please take a moment to rate and review us wherever you listen and share the podcast with a friend or colleague today.