Attacks on Commercial Vessels in Strait of Hormuz Raise Oil Supply Concerns

What happened

Since October 1st, at least three commercial vessels have been struck by unidentified projectiles in and around the Strait of Hormuz, according to warnings from the UK Maritime Trade Operations (UKMTO). On Saturday, a crude oil tanker was hit on its port side approximately 4 nautical miles east of Oman. A day earlier, an outbound vessel suffered a small fire and blackout, while a second crude tanker was struck nearby. On Thursday, a supertanker carrying 2.5 million barrels caught fire after being hit off Oman while transiting an unauthorized route, according to Iran's Fars news agency. The UKMTO also reported that 91 incidents of damage to vessels have been reported since February this year, with three tankers specifically struck in the Hormuz region since October 1, 2026.

Why it matters

The Strait of Hormuz is one of the world's most critical maritime routes for oil transportation, connecting Middle Eastern producers to global markets. Any disruption or increase in insecurity in this passage has the potential to significantly impact oil supply and, consequently, its prices. The escalation of attacks on commercial ships in this area raises the geopolitical risk premium for the commodity, signaling a possible threat to the stability of oil flow. This could lead to a reassessment of supply chains and insurance costs for maritime transport, with implications for global inflation and economic growth.

Market impact

• Interest rates and bonds: Increased global risk aversion tends to lead investors to seek out assets considered safer, such as Treasuries, which can push their yields down. However, if the oil shock is inflationary, there may be upward pressure on long-term yields, anticipating a central bank response.
• Dollar and exchange rates: In times of geopolitical uncertainty and increased risk aversion, the dollar tends to strengthen globally, acting as a safe haven. Emerging market currencies, such as the real, tend to depreciate against the dollar.
• Equities: Global stock markets tend to react negatively to increased geopolitical risk, especially if there are concerns about global economic growth due to higher oil prices or trade disruptions. Energy-dependent sectors may be impacted differently.
• Commodities: Oil (Brent and WTI) tends to be the most directly affected asset, with prices rising due to the increased risk premium and potential supply disruption. Other commodities may follow mixed trends, depending on the impact on global growth.
• Brazil: Brazil, as an oil producer, may see an initial benefit for Petrobras and other companies in the sector with rising oil prices. However, the depreciation of the real and increased domestic inflation due to fuel costs could pressure the Copom to maintain the Selic at higher levels or slow the pace of cuts, negatively impacting the local stock market and interest rates.

What to watch

Key developments to monitor include: the frequency and nature of new incidents in the Strait of Hormuz region; statements and actions by regional and international powers in response to these attacks; and the evolution of global oil inventories and demand, which could amplify or mitigate the impact of supply risks. Furthermore, the reaction of oil prices and security measures adopted by shipping companies will be crucial.

Scenarios

Base Scenario: Attacks persist at a low intensity, keeping the oil risk premium elevated but without significant disruptions to flow. Markets gradually absorb the risk, with occasional volatility. Risk Scenario: An escalation of attacks or more direct military action in the region leads to a substantial disruption of oil transportation, causing a supply shock and a surge in oil prices, with strong global risk aversion.

Original source: Middle East Eye. For information only, not investment advice.