Dual Blockade: An unprecedented situation wherein the United States and Iran simultaneously impose naval blockades on each other’s commercial shipping, creating mutual economic stranglehold with no historical parallel in modern warfare. The U.S. blockade—enforced by destroyers positioned in the Arabian Sea—prevents vessels from entering Iranian ports, having redirected 57 commercial vessels and disabled four breaching attempts. Iran’s counter-blockade operates through control of the Strait of Hormuz, the 21-mile-wide passage through which 20% of global oil transited pre-war. Iran established the “Persian Gulf Strait Authority” on May 8 to formalize vetting and taxation of ships—actions maritime experts characterize as violations of UN Convention on the Law of the Sea, which mandates peaceful passage rights. The dual blockade creates a three-way prisoner’s dilemma: vessels transiting Hormuz face Iranian interdiction and taxation; ships reaching Iranian ports face U.S. interception; ships rerouting around Africa add 6,000+ nautical miles, increasing costs 300-400% and transit times from 2 weeks to 6-8 weeks. Hundreds of vessels now sit bottled up in Gulf ports, creating floating inventories unable to reach markets. Economic impact cascades through energy (oil spiked to $126 before retreating to $94-100), petrochemicals (fertilizer shortages), and manufactured goods (Asian-Europe exports disrupted). The blockade’s sustainability depends on political resolve: both sides possess naval power to maintain positions indefinitely, but neither can break the other’s blockade without full-scale war escalation. Trump’s “one big glow” threat implies nuclear endgame, while Iran’s Supreme Leader adviser compared Strait control to possessing “an atomic bomb.” The standoff differs from Cold War blockades (Cuban Missile Crisis) because those were unilateral with clear resolution pathways. Dual blockades eliminate unilateral off-ramps: neither side can stand down without capitulating, and both suffer economically from the status quo. Historical precedent is sparse—the closest analog is British-German mutual blockade in WWI, which contributed to massive civilian suffering and U.S. war entry. Markets exhibit cognitive dissonance: stocks rallying to records despite blockade persistence suggests investors believe either AI earnings eclipse energy disruption or diplomatic breakthrough remains imminent. The May 8 firefight tests this optimism. If dual blockade persists into summer, three scenarios emerge: sustained oil prices crush consumer spending triggering recession; hyperscaler AI capex sustains tech while rest contracts (K-shaped bifurcation); or military escalation forces resolution via peace or full war. Markets price scenario two, but consumer sentiment at 48.2 suggests scenario one gaining probability.