Tariffs meet a maritime blockade

A new Federal Reserve analysis says tariffs, not lingering pandemic distortions, accounted for the excess inflation in core goods through early 2026. (federalreserve.gov) In a note published April 8, Federal Reserve economists Robbie Minton and Mariano Somale estimated tariffs implemented through November 2025 raised core goods personal consumption expenditures prices by 3.1 percent through February 2026. They said that explained the entirety of excess inflation in core goods relative to pre-pandemic rates and added 0.8 percent to core personal consumption expenditures overall. (federalreserve.gov) Four days later, U.S. Central Command said it would begin blockading all maritime traffic entering or leaving Iranian ports on April 13 at 10 a.m. Eastern time. The command said the measure applies to vessels of all nations using Iranian ports on the Arabian Gulf and Gulf of Oman, while traffic bound for non-Iranian ports can still transit the Strait of Hormuz. (centcom.mil) For importers, those are two separate cost channels hitting at once: tariffs lift the price of the goods themselves, and a blockade can lift freight, insurance, fuel, and delay costs before cargo reaches a warehouse. Bloomberg reported the blockade followed failed U.S.-Iran talks in Islamabad and could worsen global oil and fuel shortages. (federalreserve.gov; bloomberg.com) The Fed paper also said tariff pass-through was “effectively complete” in the data through February 2026, meaning retailers had already pushed most of the cost increase into shelf prices. Its earlier May 2025 note framed the same problem as separating tariff effects from energy, labor, and supply-chain pressures that can all move prices at the same time. (federalreserve.gov; federalreserve.gov) The blockade order adds a shipping risk to a route tied to oil exports and tanker traffic. Central Command said mariners should monitor formal notices and contact U.S. naval forces on bridge-to-bridge channel 16 when operating in the Gulf of Oman and approaches to the Strait of Hormuz. (centcom.mil) Bloomberg later reported the United States told ships leaving Iran they could face interception, diversion, or capture if they violated the blockade, while humanitarian shipments would be allowed subject to inspection. That raises the chance of rerouting, waiting time, and added compliance checks even for firms not buying Iranian cargo directly. (bloomberg.com) The White House has tied the wider military campaign to “Operation Epic Fury,” which it says began on February 28, 2026, and the Defense Department says has targeted Iran’s security apparatus. Iran has long faced U.S. sanctions, but a naval blockade of port traffic is a sharper disruption for shipping schedules than sanctions paperwork alone. (whitehouse.gov; media.defense.gov; state.gov) The practical question now is whether companies can absorb higher landed costs after the tariff pass-through the Fed measured, or whether another round of transport and fuel increases shows up next in consumer prices. April 13 put those two tests on the same calendar. (federalreserve.gov; centcom.mil)