Strait of Hormuz Blockade: Global Energy Disruption and Regional Supply Chain Impacts

Status: RESTRICTED

Shipping Assessment: The United States Central Command initiated a naval blockade of Iranian ports on April 13, 2026, turning back 14 ships within 72 hours (S&P Global). In response, Iran temporarily declared the waterway open for commercial vessels during a 10-day ceasefire, though the US blockade remains active against sanctioned vessels . Chinese tankers have reportedly defied the cordon to maintain oil shipments .

Naval Activity: The US Navy expanded the blockade to cover all sanctioned ships globally, warning that challenging vessels will be eliminated (The National News). Iranian military forces threatened to use asymmetric speedboat fleets and demanded cryptocurrency tolls for safe passage. The blockade extends east to the Gulf of Oman and the Arabian Sea, heavily restricting neutral transit (Times of Israel).

Insurance Premiums: War-risk insurance premiums spiked by 50%, rising from 0.125% to between 0.2% and 0.4% of hull value (Substack). This increase adds approximately $250,000 per Very Large Crude Carrier (VLCC) transit. Underwriters are maintaining these elevated rates despite temporary ceasefire announcements, demanding sustained stability before reducing costs (Insurance Business Mag).

Price Movement: Brent crude experienced extreme volatility, surging past $103 per barrel and peaking above $124 per barrel following the blockade announcement . Prices subsequently dropped to $88 per barrel after Iran's temporary reopening declaration (Insurance Business Mag). Azeri Light crude plummeted 9.6% to $104.49 per barrel amid the geopolitical whiplash .

Opec Response: OPEC output plunged by 27%, representing a loss of 7.88 million barrels per day (The National News). This supply shock surpasses the production cuts seen during the 2020 pandemic, the 1970s oil crisis, and the 1991 Gulf War. Despite the massive disruption, OPEC kept its global supply and demand forecasts unchanged in its April report (Argus Media).

Supply Disruption Assessment: Global refining capacity has been reduced by over 5 million barrels per day due to the conflict (Argus Media). Iran halted all petrochemical exports to secure domestic supply, risking $150 million per day in lost oil revenue. The disruption has forced major economies, including China and India, to quietly review and expand their strategic petroleum reserve targets (Substack).

Btc Pipeline: Operations remain stable and are gaining strategic importance as Gulf supplies remain constrained. Kazakh oil shipments via the Baku-Tbilisi-Ceyhan (BTC) pipeline reached 346,000 tonnes in the first quarter of 2026 . The route serves as a critical alternative for European markets bypassing the Persian Gulf.

Other Pipelines: An Israeli air strike damaged pipelines and processing units at Iran's South Pars gas field, prompting Tehran to halt gas exports to Iraq (Georgia Today). In Pakistan, the Baloch Republican Guards claimed responsibility for blowing up a domestic gas pipeline in Sibi, further straining regional energy infrastructure.

Pakistan: The fuel crisis and regional instability forced Barrick Gold to slow Reko Diq mine development until mid-2027. The federal government reduced diesel prices by Rs32.12 per litre to ease logistics costs for operators. To stabilize the economy, Saudi Arabia finalized a $5 billion financial support package, including a $2 billion central bank deposit .

Azerbaijan: The Astara border crossing processed 3,505 evacuees fleeing the Iranian conflict . The capital faces compound threats from a prolonged Caspian Sea seismic swarm, including magnitude 4.3 and 3.2 quakes, alongside severe urban flooding. The US naval blockade has severely disrupted Caspian shipping routes, complicating regional logistics.

Georgia: As Gulf energy supplies are constrained, Georgia faces increased pressure as a critical transit corridor for Caspian exports (Georgia Today). The global liquefied natural gas squeeze, exacerbated by strikes on Qatari facilities, is elevating the strategic importance of alternative routes. This dynamic indirectly impacts Georgian energy pricing and infrastructure security.

• Factor a permanent 0.2% to 0.4% war-risk insurance premium into all Gulf transit cost models, as underwriters will not reduce rates until sustained stability is proven.
• Diversify energy supply chains toward Caspian and US domestic sources to mitigate Persian Gulf chokepoint risks.
• Suspend non-essential personnel travel to Quetta and Gwadar, Pakistan, due to the introduction of insurgent maritime attacks and suicide drones.
• Maintain emergency readiness and structural assessments for facilities in Baku's Sabail district due to the ongoing Caspian Sea seismic swarm.

• Insurance Premium Stickiness:
• Caspian Transit Corridor Overload:
• Reko Diq Project Suspension:

This assessment synthesizes reporting from Reuters, Dawn, IRNA, RIA Novosti, shipping monitors, and 40+ and additional sources across multiple languages. Items are verified through cross-referencing across language boundaries.