OPEC has reached a tentative agreement to modestly curb crude production levels - causing a stir for the oil markets. Yet to be implemented, the details of the deal are to be finalized in November. With some players possibly unsatisfied – how stable is the agreement? Can OPEC get other crude producers on board? And how much influence does the oil cartel really hold over the market? We ask former vice president of Saudi Aramco, founder and president of Husseini Energy, Dr. Sadad I. Al-Husseini is on Sophie&Co today.