Valero Energy Co. (NYSE:VLO – Get Free Report) was down 2.8% during mid-day trading on Wednesday . The stock traded as low as $148.18 and last traded at $149.25. Approximately 1,063,138 shares were traded during trading, a decline of 66% from the average daily volume of 3,093,773 shares. The stock had previously closed at $153.60. […]