The measures name more than 30 companies, people and vessels both in Iran and elsewhere that underpin the country’s ‘shadow fleet.’

Oil prices rose for a second day on Tuesday as the U.S. imposed fresh sanctions on Middle Eastern producer Iran that increased concerns supply might tighten.

The Trump administration’s math on Middle Eastern energy supplies just doesn’t add up. The law of supply and demand is the most basic insight in economics. When there's more of a good available for sale than people who want to buy it,