Iran's PGSA blacklists multiple vessels, taking total to 120

Iranian blacklisting of vessels in batches of this size fits a pattern seen across sanctions regimes in both directions: designation rounds tend to arrive in waves and expand a running list rather than resolve it, and the cumulative total is more informative than any single batch. The read-through runs through the shadow-fleet channel: vessels named in this way typically face restricted access to insurance, classification, bunkering and port calls, which raises the cost of moving sanctioned barrels and widens the discount on them rather than removing supply outright. Episodes of designation escalation have historically been answered in kind, with each side adding names as a negotiating posture rather than as enforcement, so the tell is whether counterpart registries or Western authorities mirror the additions within days. Worth noting is that list expansion of this kind has tended to tighten freight and insurance pricing on the affected tanker segments while leaving headline crude benchmarks moved only when enforcement follows the paperwork. The follow-ons are any physical detentions or turnbacks of the named ships and whether the designations touch vessels carrying third-country cargoes, which is where spillover into broader freight markets has occurred before.