As we first reported in March when the Strait of Hormuz crisis paralyzed global shipping, and followed up in late March as container rates surged 150% and retailers like Next and H&M began booking extraordinary costs, the bill for this conflict was always coming. Tonight, it may land.

President Trump set 8 p.m. ET Tuesday as his "final" deadline for Iran to reopen the Strait of Hormuz — the narrow chokepoint through which roughly 20% of global oil trade and significant container traffic flows. Iran rejected both the U.S.-brokered ceasefire proposal and a 45-day pause, calling instead for a permanent end to the war, according to NPR. Trump told reporters the Iranian counterproposal is "not good enough," CNBC reported, while threatening to bomb Iran's energy infrastructure if the strait remains closed.

Markets are not waiting to see how this plays out.

What the Markets Are Already Telling Retailers

The S&P 500 triggered a "death cross" in late March — when the 50-day moving average crossed below the 200-day — and as of today is down roughly 7% year to date, with the Nasdaq off more than 10%, according to Motley Fool analysis. Consumer discretionary stocks are leading the selloff. WTI crude traded at $113 Tuesday morning; Brent is above $110.

Moody's AI-driven recession model now puts the probability of a U.S. recession at 49% — a level that, if realized, would translate directly into the kind of consumer spending retrenchment retailers dread most.

For context: every 10% drop in U.S. equity markets is estimated to reduce consumer spending by roughly 1%. The S&P is already down 7%+ from its peak. That's before any escalation tonight.

The Retail Supply Chain Math

Before the Iran conflict began on February 28, approximately 138 vessels transited the Strait of Hormuz daily. By early April, the Joint Maritime Information Center reported that number had dropped to roughly 12. The containers that normally flow through Persian Gulf ports like Jebel Ali — a critical hub for consumer goods entering the Gulf region — have largely rerouted, adding cost and transit time to global supply chains.

Fertilizer prices add another wrinkle: a third of globally traded fertilizer passes through the strait, and urea prices at the New Orleans import hub jumped 32% in a single week in March, IndexBox reported. Higher fertilizer costs flow into food production costs within months — another quiet inflation vector headed for grocery shelves.

Diesel nationally is running near $5.45 a gallon. Every truckload of goods delivered to every store in America costs more than it did 60 days ago.

Two Scenarios After Tonight

If Trump strikes Iran's energy infrastructure: Oil prices, already near $113, could spike sharply. Insurance costs for shipping through the region would escalate further. The 90-to-180-day lag we identified in March between shipping cost spikes and retail shelf prices means consumers would see the full impact by summer — right as back-to-school buying begins.

If a deal emerges: The relief would take weeks to flow through. Container bookings, rerouted logistics networks, and pre-purchased inventory at elevated costs don't unwind overnight. Retailers who locked in spring merchandise at crisis-era shipping rates would still absorb those costs regardless of what happens tonight.

The ISM World analysis of the conflict's supply chain effects put it plainly: there's no clean exit from this cost structure once it's been embedded.

What Retailers Should Be Watching

The immediate signals to track after tonight: Brent crude spot price (will determine whether retail fuel and logistics cost assumptions hold), container rate indices (the best leading indicator of shelf price pressure 90–120 days out), and consumer confidence readings through April.

The Conference Board's index already dropped to a 12-year low this week — a data point we covered this morning. That reading was before tonight's deadline. If the Iran situation escalates, the next consumer confidence reading could move into territory that forces retailers to fundamentally rethink their Q2 and Q3 pricing and inventory strategies.

For an industry that was already navigating 145% China tariffs, a greedflation backlash, and shuttering competitors, tonight's deadline is one variable too many to model with confidence. The only safe posture right now is optionality: retailers with flexible vendor terms, hedged logistics contracts, and lean inventory are better positioned than those who locked in cost assumptions three months ago that no longer hold.

The next 24 hours matter more than most in retail this year.