Russian officials announced over the weekend that the country will end its participation in the so-called “export corridor deal” made between the U.N., Turkey, Ukraine, and Russia. The move was in response to weekend drone strikes on a Russian vessel in a Crimean port, which Russia blamed on Ukraine. Beyond exiting the deal, Russia intensified attacks on Ukrainian cities, including Kyiv. While Ukraine, Turkey, and the UN indicated they are committed to continuing exports from the Black Sea, the practical issues of finding insurers and vessel owners willing to take that risk looms large. With Russia explicitly noting it cannot guarantee the safety of civilian vessels, WPI now views the Black Sea as effectively closed to Ukrainian...