OPEC's Influence In Dictating Oil Prices Has Eroded, Analyst Says By: Benzinga via Benzinga May 24, 2017 at 10:47 AM EDT The price of oil is dictated by many factors, but perhaps the most determining factor is the 13-member nations that make up the ... Read More >> Related Stocks: United States Oil Fund iPath Dow Jones-Goldman Sachs Crude Oil Fund