While it may have come as a surprise to the traders, who, Reuters said, were not too happy about it, the Russian companies' move was to be expected as the Trump administration pursues a foreign policy where sanctions feature prominently. This approach, however, could undermine the dominance of the U.S. dollar as the global oil trade currency.

Early indications of this undermining became evident this spring, when Russia and Iran launched an oil-for-goods exchange program seeking to eliminate bilateral payments in U.S. dollars and plan to keep it going for five years. The sanction buddies discussed this sort of agreement earlier, back in 2014, when Iran was still under Western sanctions. Even after the notorious nuclear deal was reached, the two countries decided to go ahead with their barter deal, and the preliminary agreement was reached last year. According to it, Russia would receive 100,000 bpd of Iranian crude in exchange for US$45 billion worth of Russian goods.