From blockade risk to a standing risk premium
The conflict has cooled from a closure threat into a shaky diplomatic arrangement. After the late-February U.S.-Israeli strikes on Iran and the Islamic Revolutionary Guard Corps' closure declaration in early March, traffic through Hormuz fell off, war-risk pricing jumped at once, and Gulf-dependent cargo moved into delay, inventory drawdown, and emergency sourcing. A Pakistan-brokered ceasefire in April and the 17 June Trump-Pezeshkian memorandum shifted the file from blockade to implementation risk without returning it to normal. Both governments still call the memorandum a framework rather than a settlement, and Iranian officials have said the implementation has not been tested.
What lasts is not the closure but the cost that settles in afterward, in contracts, insurance, inventory rules, and sourcing decisions. War-risk insurance is the clearest example. The extra war-risk premium on Persian Gulf voyages sat in the 0.15 to 0.25 percent of hull value range before the late-February attack, rose to 1 to 1.5 percent within days, touched a reported 10 percent at the peak, and settled into roughly 2 to 6 percent by April. Willis Towers Watson said in May that those rates are unlikely to fall after a ceasefire, because underwriters reprice only as incident-free transits accumulate, which takes years rather than months. That view comes directly from the underwriters.
A risk premium and partial re-routing, not a closed strait
Routing around the Cape of Good Hope adds something like 10 to 20 days and one to two million dollars per voyage, depending on the vessel. Hormuz is not the Red Sea, because cargo leaving the Persian Gulf has no sea route that avoids the strait. The adjustment shows up as deferred shipments, lower inventories, a little pipeline diversion, and a premium that stays on, rather than as a clean detour. Container rates moved worldwide. Xeneta reported June spot rates from China to the U.S. East Coast running about 75 percent above pre-conflict levels and about 51 to 57 percent higher on North Europe lanes. Whether those levels hold into 2027 is a forecast and should be treated as one.
The lasting effect is that buyers re-rate Gulf-dependent supply chains. Gulf industry sources and outside consultancies report companies adding second suppliers in India, Southeast Asia, and East Africa and holding more regional inventory. That is the behavior the administration's reshoring message wants to see, which is why the shock is politically convenient even where it gives the lawyers little to work with.
The most serious industrial exposure runs through helium. Semiconductor fabs use it for cryogenic cooling, leak detection, and as a carrier gas in deposition, ion implantation, and EUV lithography, and there is no practical substitute. USGS puts 2025 global helium output near 190 million cubic meters and names Qatar and the United States as the two main sources. The numbers are not all measured the same way. Qatar is usually described in production terms, around 63 million cubic meters, while the U.S. figure of about 81 million is reported as Grade-A and gaseous helium sales. The conclusion holds either way. A disruption at Ras Laffan is a semiconductor-input problem, not just an energy-market story.
Timing is what makes the chain fragile. Helium leaves the Gulf in cryogenic containers that hold their charge for only about 35 to 48 days, and roughly 200 of them were reported stranded by the conflict. QatarEnergy stopped production and declared force majeure in early March, and chief executive Saad al-Kaabi told Reuters around 19 March that the strikes would cut helium output by about 14 percent of Qatar's exports, on top of cuts to condensate, LPG, naphtha, and sulphur, with damaged LNG trains expected to take three to five years to rebuild.
The dependence is concentrated where chips are made, though the exact share moves with the source and the denominator. The Korea International Trade Association put South Korea's 2025 helium sourcing from Qatar at about 65 percent, while Barclays put South Korean reliance at 55 percent from Gulf Cooperation Council countries and Taiwan at 69 percent from GCC countries. The framing differs more than the underlying fact. U.S. import reliance is lower and more spread out. USGS reports 2021 to 2024 helium import sources of Canada 47 percent, Qatar 28 percent, Algeria 10 percent, China 5 percent, and other 10 percent. Spot helium prices were estimated to have risen 40 to 50 percent in the weeks after the escalation, which is an analyst estimate rather than a government figure.
Helium is not on the U.S. critical minerals list. USGS left it off the 2022 list and left it off again in the Final 2025 List of Critical Minerals published 7 November 2025, which added copper, silicon, silver, potash, phosphate, uranium, and others after looking at helium and rejecting it in the August 2025 draft. That keeps helium out of the processed critical minerals Section 232 track entirely. The only plausible 232 home for it is the semiconductor case, as an upstream input folded into the chip supply-chain record, but the semiconductor proclamation on the books covers advanced-computing chips and their derivative products, not the specialty gases used to make them.
Helium can carry a Section 232 story, but no current tariff line reaches it. The realistic route is not a tariff today but a later semiconductor update, or a modification of that action, that writes gas-input risk into the chip record. A real vulnerability with no instrument to act on it is the problem at the center of this brief.
Fertilizer and sulfur are farm-price politics, not Section 232
The non-energy exposure goes well beyond helium. Up to about 30 percent of internationally traded fertilizer normally moves through Hormuz. Gulf producers supply on the order of 40 percent of seaborne urea exports, and the Persian Gulf handles roughly 44 percent of seaborne sulfur trade, with sulfur feeding the sulfuric acid used in phosphate fertilizer and in battery-metal leaching. Urea prices roughly doubled through April and DAP rose about 35 percent. U.S. exposure is real but cushioned. Domestic output covers about 94 percent of ammonia, while roughly 17 percent of U.S. urea use and about 20 percent of U.S. phosphate use trace back to Gulf exporters moving through the strait.
For Section 232 these are weak cases, and for farm politics they are strong ones. The United States makes most of its own nitrogen, the pain lands on farmers as higher input costs rather than on a domestic industry losing ground to imports, and a tariff that raised the cost of inputs farmers cannot source elsewhere would do the opposite of what the constituency wants. The statute is built to restrict imports, and this is a problem about losing them.
Section 232 can carry a vulnerability argument, but a chokepoint loss is a poor fit
Section 232 of the Trade Expansion Act of 1962 runs through a Commerce investigation, a finding that imports threaten to impair national security by their quantity or the circumstances of their entry, a report within 270 days, a presidential decision within 90 days, and implementation within 15. The reference to circumstances leaves room for a supply-chain argument, and Commerce has long read national security to include economic security and infrastructure resilience. Even so, Hormuz fits the statute poorly. The familiar 232 case is an import pattern that hollows out domestic capacity or deepens a dependence. Hormuz is the reverse, a threatened cutoff of inputs the United States needs, through a foreign chokepoint, and on the better reading of the June memorandum a temporary one. Commerce could cite the disruption as evidence of wider import vulnerability, especially for semiconductor inputs, but the war works better as supporting evidence than as the basis for a lasting tariff. That is a read of the statute, not a forecast of what Commerce will decide.
The framing is there if the administration wants it. Commerce Secretary Lutnick has called critical minerals a pillar of economic security, and USTR Greer reaches for chokepoint and supply-chain language often. What stands out is that neither has said on the record that the Hormuz or Iran-war disruption justifies new or wider Section 232 tariffs. Greer's chokepoint references at his late-May Council on Foreign Relations appearance were about China's hold on critical-minerals processing, and his one mention of the Strait of Hormuz there was a foreign-policy aside he flagged as outside his tariff brief. The link is being drawn by outside analysts rather than by the principals, which fits the sense that a one-off geopolitical interruption is shaky ground for a durable import-restriction finding.
The live docket is Section 301
The investigation people keep describing as a new Section 232 excess-capacity action is actually a Section 301 case run by USTR. USTR opened it on 11 March 2026, with the Federal Register notice and docket following in mid-March, against sixteen economies including China, the EU, Korea, Japan, Taiwan, and India. Hearings ran in early May, on a fast track aimed at possible tariffs around 24 July 2026. The legal test is whether foreign acts, policies, or practices are unreasonable or discriminatory and burden U.S. commerce, and the named sectors include semiconductors, steel, aluminum, and chemicals. That is where an excess-capacity argument belongs, under a different agency, a different statute, and a different remedy. A 301 case turns on foreign conduct and can move quickly. A 232 case turns on a Commerce national-security finding and runs on a 270-day clock. Telling the two apart is what decides which docket to watch and how to judge the timing.
Any new 232 action would build on the metals regime already in place. As of June 2026 it stands at 50 percent on steel, aluminum, and most copper articles. Proclamation 11021, effective 6 April 2026, moved the duty base from metal content to full customs value and ended the inclusions process. Proclamation 11032, effective 8 June 2026 and temporary through 31 December 2027, widened reduced-rate coverage and dropped the U.S.-content threshold for derivative relief to 85 percent. Two product-specific actions matter more here. Proclamation 11002, effective 15 January 2026, put a 25 percent duty on a narrow set of advanced-computing chips and ordered a data-center market update by 1 July 2026, with a possible broader second phase. The processed critical minerals action under produced a Commerce report in late October 2025 and a that chose negotiation over tariffs, with a status update due around 13 July 2026. Either could absorb a chokepoint-vulnerability argument.
Bottom line
The shock gives the administration a story. It does not give Commerce a finding it can act on. What lasts is a higher war-risk premium, partial and expensive re-routing, and faster supplier diversification among Gulf-dependent buyers, with helium and semiconductors the clearest case of how fragile a single input can be. The legal fit is loose. Helium sits outside the critical minerals list and outside the chip tariff scope, fertilizer and sulfur are farm-price politics, the principals have not tied the war to their tariff dockets, and a temporary chokepoint loss is weak ground for a durable national-security finding. The case the shock actually strengthens is USTR's Section 301 excess-capacity investigation. For now the war is evidence and rhetoric that reinforce dockets already open, not the trigger for a new tariff line.
What the practitioner should do
In-house trade teams should map helium and specialty-gas exposure now. It is the input most likely to be named in future supply-chain advocacy, even though no Section 232 line reaches it today, and the 1 July 2026 semiconductor data-center update, along with any later change to the semiconductor action, is where a gas-input argument would most likely appear. Customs and trade lawyers should watch the processed critical minerals status update due around 13 July 2026 for any move from negotiation to tariffs, and should watch whether Commerce opens or widens a Section 232 investigation on chokepoint grounds. Everyone should track the Section 301 excess-capacity docket toward its late-July 2026 decision as the most likely near-term tariff event and should keep it separate from Section 232. On the metals stack, treat the 50 percent rate as the baseline and the reduced derivative rates as interim relief through 31 December 2027. That includes the 15 percent treatment for certain industrial and electrical grid equipment and any 10 percent U.S.-content-based treatment, but only where the HTS line, product description, and origin or content condition clearly support it. Check classifications against the full-value duty base introduced in April. Finally, price the risk premium into Gulf-routed sourcing on the underwriters' own view that it will not normalize on the diplomatic calendar, and use supplier diversification and regional inventory as the hedge, whichever docket moves first.
Caveats
The situation is still moving. The June memorandum is a framework, not a settlement, and was untested when this was written, so the line between a temporary and a durable shock could shift. Several figures vary by source and should be read that way rather than blended. EIA describes Hormuz throughput as about 20 million barrels per day, or roughly 20 percent of global petroleum liquids consumption, while IEA frames the same volume as about 25 percent of seaborne oil trade, a different denominator. Qatar's helium share is reported anywhere from about 30 to 35 percent. South Korea's helium dependence is given as about 65 percent from Qatar by the Korea International Trade Association and as 55 percent from the wider GCC by Barclays, which is a difference in framing rather than a settled number, and the USGS helium figures cited here mix national sales and global output and should not be read as one consistent series. The price-move and repair-time figures for helium come from analysts, consultancies, and company statements rather than government data and are labeled estimates. War-risk premium ranges and freight increases vary by vessel, flag, and date. The legal judgments here are a reading of the statutes rather than predictions of agency action, and any Section 232 outcome depends on Commerce findings that have not been made.
Source note
This analysis is anchored in the 11 official source records shown in the evidence trail and supplemented by the contemporaneous market and conflict reporting described below. The records comprise White House Proclamations 11002, 11021, and 11032 and accompanying fact sheets, CBP CSMS guidance, Federal Register notices including the 17 March 2026 Section 301 initiation, USGS Mineral Commodity Summaries 2026 and the Final 2025 List of Critical Minerals, and EIA and IEA Strait of Hormuz data. Conflict timeline and market figures draw on contemporaneous reporting from Reuters, Al Jazeera, NPR, and CNN, commodity and input data from the FAO, IFPRI, the NDSU Agricultural Trade Monitor, and the World Bank Commodity Markets Outlook, shipping and insurance figures from Marsh, Lloyd's List, Willis Towers Watson, and Xeneta as reported in trade press, and administration framing from USTR and Commerce public appearances. Tariff rates are stated by legal authority and by announced versus effective date, and reduced metals tiers are interim through 31 December 2027 and depend on HTS line and origin or content conditions.