West Texas Intermediate crude capped a sixth weekly decline, the longest stretch of losses in 15 years, as rising U.S. supplies countered speculation that the Federal Reserve will maintain stimulus of the economy. Futures fell 0.8 percent this week, poised for the longest streak since December 1998. U.S. crude stockpiles climbed for an eighth week as output expanded to the highest level since January 1989, data yesterday from the Energy Information Administration showed. WTI rebounded earlier after Janet Yellen , the nominee for Fed chairman, said yesterday the central bank shouldn’t end its asset-purchase program too soon. “We are looking at swollen supplies here as production continues to rise, which has put a lot of downward pressure on WTI,” said Addison Armstrong , director of market research at Tradition Energy in Stamford , Connecticut . “As long as the Fed appears to be continuing its stimulus ad infinitum, WTI […]