World Fuel Services (NYSE:INT) was downgraded from Buy to Neutral at SunTrust today. The stock closed yesterday at $43.70 on volume of 733,000 shares, above average daily volume of 531,000.Potential upside of 22.4% exists for World Fuel Services, based on a current level of $43.70 and analysts’ average consensus price target of $53.50. The stock should discover initial support at its 50-day moving average (MA) of $42.46 and subsequent support at its 200-day MA of $40.29.