The sanctions squeeze on oil supply from Russia and Iran are tightening the oil market and supporting crude prices as buyers look for additional legit barrels while sanctioned supply is piling in floating storage, according to the world’s biggest independent oil trader, Vitol. “The traditional buyers of those two supply sources are reaching for more Western or Saudi supply sources, which is then in turn tightening the real market,” Vitol’s CEO Russell Hardy said at the International Energy Week conference in London…