Strait of Hormuz clash hits oil and shipping

Shipping traffic through the Strait of Hormuz has been largely blocked by Iran since 28 February 2026, following U.S. and Israeli military actions against Iran. The Iranian Revolutionary Guard Corps (IRGC) has issued warnings forbidding passage through the narrow waterway, which is a key transit route for global oil shipments.

These warnings and actions have led to a sharp decline in maritime transit. Overall maritime traffic through the strait has dropped by about 70%, reflecting both reduced tanker movements and broader shipping disruptions.

More than 150 vessels are reported to be anchoring outside the Strait of Hormuz to avoid the security risks posed by the heightened military tensions. Many ship operators appear to be holding position rather than risk transiting the contested corridor.

The reduction in traffic has been particularly acute for tankers carrying crude oil and refined products. Tanker traffic alone is estimated to have fallen by about 70%, mirroring the broader collapse in activity through the strait.

With the Strait of Hormuz serving as a major export route for producers in the region, the blockage and associated risks are constraining available oil supplies to international markets. This has intensified concerns about near term supply security.

The disruption is occurring during an ongoing fuel crisis tied to the war between Iran and the U.S.-Israel coalition. Market participants are monitoring both the physical availability of barrels and the safety of key shipping lanes.

Brent crude (UKOIL) prices surged by about 10-13% in early trading after the Hormuz disruptions escalated. Analysts cited the sharp cut in maritime flows and the strategic importance of the strait as key drivers of the rapid price move.

Amid the fuel crisis, oil prices have risen above $100 per barrel. Some analysts warn that Brent could reach $100 per barrel or higher if the current disruptions persist, signaling continued upside risk to energy costs.

Rising oil prices are feeding into broader inflation worries, as higher energy costs filter through to transport, manufacturing, and consumer goods. Policymakers and businesses are watching for signs of either de escalation or further supply stress.

President Trump has stated that the U.S. Navy is still enforcing a blockade on all shipping in and out of Iranian ports, following Iran’s closure of the strait. This naval posture underscores the depth of the confrontation around Iran’s maritime access.

The U.S. and Israeli military actions against Iran formed the backdrop to Tehran’s decision to restrict traffic through Hormuz and to have the IRGC issue warnings against passage. These developments have entrenched a standoff at one of the world’s most critical energy chokepoints.

With both Iran’s closure of the strait and the U.S. blockade on Iranian ports in place, there is little indication from the reported statements that tensions will ease quickly. Market and shipping participants remain exposed to further operational and price volatility.