Same applies to the energy market. The global energy market is currently facing a massive, industrial version of this "Insurance Closure." Within 72 hours of the first strikes on Iran last Saturday, major marine insurers issued
"Notices of Cancellation" for the Persian Gulf. This creates a "Paper Blockade": it doesn't matter if the water is physically clear; if a shipowner cannot secure a "War Risk" policy, the ship stays anchored. To get back into the water, they must pay
reinstatement premiums that have surged by over 1,000%. For a single tanker, that insurance cost has jumped from $625,000 to roughly $7.5 million per voyage.