How Long Can the Market Look Through a Closed Strait?

The market's mental model for Hormuz risk is built on the Tanker War of the 1980s and every Gulf scare since. In every prior episode, the strait remained open. Ships were attacked, insurance premiums rose, naval escorts were deployed, and traffic continued. The Tanker War ran for seven years, damaged over 500 ships, killed more than 400 mariners, and never once closed the waterway. Oil prices actually declined in real terms through the 1980s despite the attacks.

The market has correctly looked through every prior Hormuz scare because every prior scare was a harassment campaign against shipping, not a closure. This is a closure. The strait was mined. Twenty-one confirmed attacks on merchant vessels. Tanker traffic collapsed by more than 90% within days of the February 28 strikes. The only precedent for a full closure of a major maritime chokepoint is Suez from 1967 to 1975, which stayed closed for eight years.

The base rate the market is using does not apply because the event itself has no post-1945 precedent at this chokepoint.

A deal does not reopen the strait. A deal starts a sequence. Mine clearance is a multi-step process involving survey, detection, identification, and neutralization. The U.S. Navy began positioning mine countermeasure assets on April 11 and has acknowledged the process will be slow. Pre-war estimates indicated Iran holds between 5,000 and 6,000 naval mines with the submarine fleet to sustain a mining campaign for up to six months. Nobody knows how many have been laid. The capability to search, identify, and destroy mines autonomously does not exist today.

After mine clearance comes insurance repricing. War-risk premiums spiked at the onset and must normalize through an underwriting process that follows demonstrated safety, not diplomatic announcements. Then tanker repositioning: vessels rerouted to alternative supply chains do not return to the Gulf on a headline. Then production restart from wells shut in for weeks or months. The EIA assumes normalization in late 2026, and that forecast was built on the assumption the conflict ends in April. It has not ended.

The market is pricing a V-shaped energy normalization. The physical reopening timeline is a staircase at best.

Companies can absorb $100 oil if they can budget for it over a known duration. They cannot budget for an open-ended disruption with a resolution timeline that resets every two weeks. This is the mechanism that separates the current shock from 2022. After the Ukraine invasion, oil spiked but the supply disruption was partial and the alternative routing was visible within weeks. Russian oil found its way to India and China. European buyers pivoted to U.S. LNG. The futures curve gave companies planning visibility even at elevated prices.

Hormuz offers no equivalent visibility. The disruption is total through the strait. The physical reopening timeline is genuinely unknown. The ceasefire keeps expiring and restarting on rolling two-week windows. Companies cannot issue forward guidance when they do not know whether input costs will be $85 or $120 in July.

That uncertainty does not merely compress margins. It freezes capital allocation decisions, hiring plans, and expansion commitments. Constellation Brands pulled its long-term outlook. Knight-Swift slashed Q1 guidance, citing fuel costs. The guidance withdrawals are the leading indicator that management teams see the planning horizon collapsing even if equity investors do not. And the planning horizon crisis is amplified by the simultaneous tariff uncertainty, creating a two-front visibility problem that has no precedent in the post-1990 dataset.

These are not linear problems. They are cascading problems. A closed strait raises energy costs, which raises shipping costs, which raises input costs across supply chains, which forces Asian economies into emergency rationing measures, which disrupts demand patterns that companies were planning around. Each second-order effect generates its own third-order effects. The damage model cannot be run while new inputs arrive daily. That is the amplifier the market has not priced.

The next 90 days run through four sequential decision points. Each one narrows the branch structure for what follows.

Each path through the decision tree compounds differently. The same Q2 earnings season produces four entirely different market responses depending on which nodes resolved and how.

Paths C and D start from the same Node 1 outcome and diverge at Node 3 on whether the AUMF produces leverage or expansion. Those paths are dramatic and the market will reprice sharply if either activates. They are also the paths the market is watching for. The risk the market is not watching for is Path B.

In Path B, no node resolves crisply. The ceasefire holds but produces nothing. The War Powers deadline arrives but nobody enforces it. The AUMF gets drafted but never voted. Each node passes without forcing a decision, and the absence of a decision is itself the outcome. There is no single headline that says "stalemate confirmed." It becomes the default state through inaction.

And delay is asymmetric. Iran retains leverage over the strait. The cumulative oil shortfall grows. Insurance markets reprice further. Supply chains reroute more permanently. Gulf production capacity that sits idle degrades. The U.S. absorbs the domestic political cost of high gas prices while Iran, already under maximum sanctions, absorbs very little incremental pain. Iran's negotiating position strengthens with time, not weakens, because the cost of continued disruption accrues primarily to the global economy and to American consumers.

By the time Q2 earnings arrive in July, a three-month stalemate has produced the same planning horizon collapse as a brief escalation. The difference is that the escalation path would have forced the market to reprice in real time. The stalemate path allows the damage to accumulate below the waterline while the headline says "ceasefire holds" and the S&P sits at 7,000.