US President Trumpís increasingly hostile stance, with the threat of more sanctions, has cast a shadow over Iranís plans to seek $200bn in foreign investment to revamp its oil sector. As it struggles to sign new energy deals and resolve payment issues, optimism has turned to caution among many investors.

 

After several torrid years, there have been high hopes for Iran’s oil industry since the broad lifting of international sanctions in January 2016 on the back of...