The U.S. trade deficit dropped to a seasonally adjusted $38.5 billion in November, down 21 percent from October and the smallest deficit in nearly three years. Interestingly -- especially on the biofuels front, when the implication of the blend wall is considered -- the trade deficit largely was driven by the energy sector. Record volumes of petroleum products were exported, while crude oil imports were down to a 16-year low. Since 2005, real oil imports are down 22 percent, but real oil exports through petroleum products have tripled due to increased mileage automobiles and the displacement of some products via biofuels and increased domestic production. The U.S. became a net exporter of petroleum products in 2011 for the first time sinc...