Asymmetric Denial

This paper assesses the blockade phase of the 2026 Iran war as a cost-imposing strategy and sets out what makes it, and keeps it, favorable to the United States. Evidence runs through 19 September 2026, and results are stated as conditions so that they hold when the inputs change. The dollar exchange is favorable while the U.S. cost of denial stays below the blockade-attributable Iranian loss, about $55 billion a year or $4.6 billion a month. The Congressional Budget Office rate of $2–3 billion a month is below that line; the Pentagon’s observed rate of about $4.8 billion is at or slightly above it. The relative-burden ratio equals the dollar ratio multiplied by the ratio of the two economies, about 90 to 108 depending on the year of Iranian GDP used, and is reported as a derived figure.

The durable asymmetry is in endurance: Iran likely exhausts accessible foreign exchange within about a year of continuous blockade, while the United States faces no fiscal limit. Denial disarms by starving military industry of revenue and imported inputs, as it did in Iraq from 1991 to 2003, and does not by itself change governments. Against China the effect is structural and modest. Russia gains while prices stay high. U.S. partners bear most of the price shock, and if the contest of the Strait of Hormuz is counted as a cost of the blockade the coalition-level exchange is unfavorable.

Six measures convert those entries: separating the strait from the blockade, partner cost-sharing, price and sanctions pressure on Russia, closing outside financing to Iran, protecting interceptor stocks, and a defined settlement. The paper gives a conditional escalation framework, an endurance comparison, and six dated predictions.