CNBC | Oil prices rise as US sanctions on Iran begin, Tehran defiant CNBC Oil prices rose on Monday after a steep five-day slump, as the United States formally imposed punitive sanctions on Iran but granted eight countries temporary waivers allowing them to keep buying oil from the Islamic Republic. The sanctions are part of ... Oil up as US imposes sanctions on Iran, Tehran defiant Washington Issues Waivers, Warns Against Trading Oil With Iran Oil Bounces Higher On Supply Concern as Iran Sanctions Kick In |