---- Ein chinesischer Arbeiter reinigt die Tafel an einer Tankstelle von PetroChina, eine Tochtergesellschaft der CNPC (China National Petroleum Corporation), in Fuzhou c
--FILE--A Chinese worker cleans the signboard at a gas station of PetroChina, a subsidiary of CNPC (China National Petroleum Corporation), in Fuzhou citt, southeast Chinas Fujian province, 1 November 2014. PetroChina Co., Asia¯s biggest energy producer, fell the most in more than a year and helped lead declines among the region¯s oil producers after OPEC maintained output in the face of a supply glut. As a low-margin producer, PetroChina is one of the companies with the highest sensitivity in terms of earnings and market value to oil price moves, according to a research note today from Neil Beveridge, a Hong Kong-based analyst at Sanford C. Bernstein & Co. The company fell as much as 5.6 percent to HK$8.21 in Hong Kong, its biggest intraday decline since August last year. The impact on earnings of Asian oil and gas companies will be significant if current prices of around $70 a barrel are sustained over the next year, according to Beveridge. West Texas Intermediate crude was down 6.6 percent at $68.86 a barrel at 11:04 a.m. in Tokyo. The price has fallen 30 percent in 2014.