Oil markets are famously sensitive to uncertainty. Global conflict can send prices higher on concerns that crude oil supplies could be disrupted. This is playing out in response to Russia’s unprovoked acts of war against Ukraine. Russia is a major supplier of crude oil and other energy products globally, though less so in the United States. In recent days, many market participants have committed to stop purchasing Russian oil. Shipping companies are concerned about loading cargoes from Russia and some shippers are finding the cost associated with such cargoes too high. These moves are tightening an already tight market.