Jerusalem claims Tehran broke the agreement in 1979 in wake of Islamic revolution.
Recent rally in oil prices would force producers to drill, adding to existing glut, says Goldman Sachs analysts.
CBI president Sir Mike Rake says the cost of leaving will harm Britain's place in the world.
The number of US rigs actively drilling for oil have now fallen for the 23rd week in a row.
US dollar weakened this week, after dismal US data, and the dollar index has now dropped for five weeks in a row.
Saudi Arabia continues to intensify production, moving market share away from high-cost rivals US shale producers.
Riyadh upped crude production and 60% of rigs in US shut.
Help needed to fight extradition and meet bail conditions.
Investing in distressed oil companies could be risky say finance experts.
Morgan Stanley's giant physical oil trading business is the largest and oldest on Wall Street.
Goldman Sachs says that a "sequential decline" in crude oil prices might not begin until later in the year.
French president, on state visit, urges west to life embargo on Cuba.
Brent crude could trade at an average price of $60 a barrel in the third-quarter of 2015 and then rise to $65 a barrel.
China's crude oil purchases are expected to remain robust despite slowing economic growth.
Capital Economics expects some major headwinds for crude oil prices, both on the supply and demand side.