West Texas Intermediate narrowed its discount to Brent to the least in more than two months following the start of a pipeline carrying crude out of the U.S. storage center in Cushing, Oklahoma . The spread between WTI and Brent on the ICE Futures Europe exchange shrank to $9.82 a barrel today, the smallest gap since Nov. 11. WTI advanced as much as 0.5 percent in a fifth daily gain in New York , the longest rally in seven weeks. The Gulf Coast line, the southern leg of the Keystone XL pipeline, was initially transporting 288,000 barrels of light, sweet crude a day to Nederland in Texas. “The Keystone XL south is about to increase arbitrage between Cushing and the Gulf Coast,” which will cause inventories at Cushing to decline, said Eugen Weinberg , head of commodities research at Commerzbank AG in Frankfurt . WTI’s discount of about $10 […]