Yoruk Isik | Reuters FILE PHOTO: Crude oil tanker Nevskiy Prospect, owned by Russia's leading tanker group Sovcomflot, transits the Bosphorus in Istanbul, Turkey September 6, 2020. The oil market is shrugging off President Donald Trump's threats to impose heavy tariffs on countries that buy Russian energy exports. watch now Trump has given Russia until Friday to agree to a ceasefire in Ukraine. If Moscow does not comply, the U.S. will impose 100% "secondary tariffs" on countries that buy Russian exports, th ...