The Hormuz Rally Shows Diplomacy Is Still an Inflation-Fighting Tool

What actually moved

U.S. stocks rose on June 12 while crude fell, and the cleaner read is not that investors suddenly became sentimental about peace. It is that markets marked down the probability of an energy-supply shock.

AP reported the S&P 500 gained 0.5%, the Dow rose 353.51 points, or 0.7%, and the Nasdaq added 0.3%. AP tied part of the move to Brent crude falling 3.4% to $87.33 as investors weighed hopes for a U.S.-Iran arrangement. Reuters put Brent down $3.13, or 3.46%, at $87.25 by 1111 GMT, with WTI down 3.58% at $84.57.

That is still expensive oil. Brent remained well above its pre-war level. But markets do not need certainty to move. They move when the odds change. The inference is straightforward: a credible path toward reopening or normalizing the Strait of Hormuz reduces the war premium embedded in crude, fuels, shipping, insurance, and inflation expectations.

Why Hormuz is an inflation issue

The Strait of Hormuz is not a symbolic shipping lane. The IEA estimated that nearly 20 million barrels per day of oil exports moved through it in 2025, about a quarter of world seaborne oil trade. It also said Qatar and UAE LNG flows through Hormuz represented 19% of global LNG trade and had no alternative route to market. The EIA similarly estimated 2024 flows at about 20 million barrels per day, roughly 20% of global petroleum liquids consumption, with limited bypass capacity through Saudi and UAE pipelines.

That makes the macro channel practical, not theoretical: oil affects gasoline, diesel, jet fuel, petrochemical inputs, freight costs, utility bills, and then inflation expectations. If those pressures ease, the Federal Reserve has less reason to offset an energy shock by keeping policy tighter. If they return, rate expectations can turn hawkish quickly.

Rate-market evidence is relevant but not clean. Investing.com’s CME-based Fed monitor showed a 97.1% probability of no move at the June 17 FOMC meeting and an 88.8% hold probability for July 29, while December pricing was more divided. Reuters also reported fed funds futures priced a 55% chance of a rate increase by December. Oil is not the only input into those probabilities; labor data, inflation prints, Treasury supply, Fed communications, and positioning all matter. Still, the oil-rate-inflation link is the core macro signal.

The deal is not the same as open water

Axios reported that the U.S. and Iran, with Pakistani and Qatari mediators, were expected to virtually sign a memorandum of understanding on June 14 to extend the ceasefire by 60 days, reopen Hormuz, and begin nuclear-program negotiations. As of June 14, the important caveat was implementation. A memorandum is not cargo moving at normal speed.

Physical flows can lag headlines. Shipowners, insurers, militaries, port operators, LNG buyers, and crude traders have to treat the route as usable in practice. Damaged facilities, mines, security checks, depleted inventories, and summer demand can all blunt the price relief. If inventories fall toward operational minimums before flows normalize, crude can rally even while diplomatic language remains constructive.

This is where lazy market framing misses the point. The story is not simply that stocks celebrated peace hopes. It is that diplomacy, when it lowers the probability of a real supply-chain chokepoint closing, can function as an inflation-fighting tool. It does not create barrels or LNG cargoes. It can make existing supply usable again and remove part of the risk premium consumers and firms ultimately pay.

The reverse is also true. If the arrangement fails or is interpreted differently by the parties, the same mechanism can run backward: higher crude, higher inflation pressure, more hawkish rate pricing, and weaker risk appetite. The June 12 rally was rational. It was not proof that the shock is over.