OPEC and its allies reached a preliminary agreement in the face of strong opposition from Iran to boost production by a theoretical 1 million barrels a day — the actual increase will be smaller as several countries are unable to raise output. Amrita Sen, chief oil analyst at consultant Energy Aspects, and Bob Yawger, director of futures at Mizuho, talk with Bloomberg's Alix Steel about the OPEC meeting, oil production levels and oil prices. (Source: Bloomberg)