Oil supertankers face the highest hire costs in a decade as the threat of a US strike on Iran escalates, according to Bloomberg Markets. The cost to charter these massive vessels, crucial for moving crude oil globally, could surge further due to increased geopolitical risk and a shift toward concentrated ownership. This development directly impacts shipping costs for energy companies and refineries, potentially raising fuel prices for consumers. US attack risk remains the primary driver, with analysts noting vessel concentration trends amplifying market sensitivity to any conflict escalation. Oil supertankers represent a key cost factor for global energy logistics, making this a critical concern for investors tracking energy sector margins.