(updated )
The Hormuz Arithmetic — US Out of Missiles, and the REE Supply Chain Makes Replenishment Impossible
Operation Epic Fury has burned through critical TLAM, JASSM, and THAAD inventories. China controls the rare-earth supply chain for replenishment. The US cannot sustain a multi-theater air campaign beyond weeks. There is no bridge.
The US is fighting a precision-guidance war with irreplaceable munitions. This is arithmetic, not debate.
The Inventory
Larry Johnson’s latest assessment opens with numbers that reduce Operation Epic Fury to a supply-chain problem with a hard ceiling:
Tomahawk cruise missiles. Pre-war inventory heavily drawn down. Production rate: approximately 86 per year. Expenditure rate in the Hormuz campaign: multiples of production. The math fails regardless of political commitment.
JASSM (Joint Air-to-Surface Standoff Missile). The only reliable penetrator against Iranian air defenses. Pre-war inventory across all variants: roughly 2,300. Expenditure since Epic Fury began: more than 1,000. The remaining global pool is critically thin — and additional production faces a bottleneck the Pentagon does not control.
THAAD interceptors. Burn rates against Iranian ballistic missile salvos exceed production. Every THAAD fired at an incoming Fateh-110 is a round that cannot protect a Gulf base next week.
PrSM (Precision Strike Missile). Fewer than 60 available when Epic Fury started. Contracts call for 335 by 2029. The current campaign consumes them faster than the contract delivers.
The REE Bottleneck
The replenishment problem is not about defense budgets or political will. It is about rare earth elements.
Precision munitions require neodymium, dysprosium, samarium-cobalt — all processed almost entirely in China. The US has mining capacity but negligible processing capacity. Every JASSM, every THAAD, every Tomahawk guidance system depends on a supply chain that runs through Beijing.
China has not embargoed rare earth exports to the US. It does not need to. The processing capacity alone — the furnaces, the separation facilities, the magnet fabrication plants — creates a throughput ceiling. The US cannot surge production because the physical infrastructure for surge production exists in Inner Mongolia, not in Texas.
What This Means
The “infinite arsenal” assumption — that the United States can sustain a precision air campaign indefinitely because it has the world’s largest defense budget — is false. The constraint is not fiscal. It is physical.
A campaign that requires degrading a dispersed, hardened Iranian target set (1,000+ launch positions along the 171-mile Strait coast, plus interior sites beyond current weapon range) with a fixed and depleting stock of penetrators is not a campaign. It is a clock.
Helmer Bar: MEDIUM-HIGH. The inventory numbers derive from open-source procurement data, DoD contract figures, and standard range/ballistics calculations. The REE processing concentration in China is public domain (US Geological Survey, IEA Critical Minerals reports). The exact JASSM remaining figure requires corroboration from independent OSINT but conforms to known expenditure rates. The operational asymmetry is geometric — it does not require classified data.
Rates implication. This is a supply-side bear steepener. The front-end (2Y-5Y) rallies on recession fear — every week of Hormuz disruption brings demand destruction nearer. The long-end (30Y) sells off on the structural inflation implied by defense fiscal impulse (emergency procurement), REE supply inelasticity, and the duration premium of an Iran campaign that cannot be ended by bombing. Pay 30Y / receive 5Y. The convexity is in 1Y×30Y payer swaptions: if Bab al-Mandab closes, 30Y does not go to 5.2%. It goes to 5.8%.
See also: Iran MoU formally dead, threat to close Bab al-Mandab. The dual-strait scenario compounds the munitions math.