A US Official says "by the end of November, three aircraft carriers and two landing groups will be deployed around Iran", Al Jazeera reports

Multi-carrier concentrations around Iran have historically been the most legible form of US signalling short of actual strikes: three carrier groups with amphibious landing elements is force posture well beyond routine presence, and past episodes of comparable build-up have tended to precede either coercive diplomacy backed by a deadline or limited kinetic action, with the deployment itself usually announced well before any decision to use it. The channel that matters first is freight and insurance: war-risk premia in the Gulf and tanker rates through Hormuz have repriced on posture alone in previous standoffs, ahead of any disruption to physical crude flows, with the crude market typically adding a geopolitical premium that decays if the deadline passes without incident. The attribution to an unnamed official via a regional broadcaster is itself a tell; deliberate leaks of this kind are usually intended to be read by Tehran as much as by markets. The distinctions worth drawing are between a deployment that plateaus and one still building, and between carriers positioned for air tasking versus landing groups, which imply ground-option contingency rather than standoff strikes. The follow-ons are whether the build-up is confirmed on the record, any parallel diplomatic track or ultimatum, Iranian proxy posture in Iraq and the Gulf, and movement in regional air-defence and logistics assets, which have historically been the more reliable leading indicators than the carriers themselves.