About a month ago on February 28, the United States and Israel launched surprise attacks on Iran that killed Iranian Supreme Leader Ali Khamenei and other military bigwigs. Since then, there have been military strikes from both sides. The fallout from this war and how it will end remains to be seen. We have already seen one of the predictable outcomes come to fruition.
There is about 20 percent of the world's petroleum and liquified natural gas that passes through the Strait of Hormuz. Because of the Strait being all but closed, oil barrels have already increased from $73 a barrel at the eve of the war to around $113 a barrel. What is interesting here is not merely the magnitude of the spike, but its timing. The market did not wait for a sustained disruption in supply. They moved almost immediately after the war started.
And because energy is a universal input into the economy, the price movement does not stay confined to the oil market. It feeds directly into transportation costs, manufacturing inputs, agricultural production, and electricity-intensive sectors like artificial intelligence and data infrastructure.
But this is more than the immediate shock of the military escalation. It is uncertainty about the future. A study from the Federal Reserve Bank of Dallas finds that even when the increase in the probability of a worst-case scenario rises, the prices start to rise and the output starts to drop. As the conflict progresses, the probability does not disappear; it intensifies.
The risk becomes more realized with higher insurance costs, higher shipping costs, and increased precautionary behavior. The risk premium driven by expectations blends into a price increase driven by reality. As this other study from the Federal Reserve Bank of Dallas calculates, the longer the conflict persists, the more permanent those price hikes remain and the bigger the impact on the GDP (see below).
The costs go beyond the energy market. As of March 23, there has been nearly $29 billion spent on this war. The Cato Institute points out that this undefined war has no clear exit strategy, which makes it more like the war in Afghanistan. Then there's the fact that when geopolitical risk rises, companies do not invest; they wait. Research from the Federal Reserve shows that heightened uncertainty about wars and conflicts causes business to delay capital spending and hiring, which leads to a sizable drop in investment.
Taken together, the economic consequences of war extend beyond headline figures. Higher gasoline prices are the most visible cost, but it one of many costs in a long chain of government expenditures, business decisions, and long-term economic growth. As uncertainty rises, investment falls along with economic growth.
In that sense, war operates like a hidden tax that shows up in the form of higher prices, larger deficits, and a slower-growing economy. It's amazing because it's a tax that no one in the U.S. voted for, that no one in the U.S. can escape, and will get explained away afterwards as if nothing happened.
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