Market values of PetroChina, Exxon since mid-2010 PetroChina Co. passed Exxon Mobil Corp. today as the biggest energy company by market value for the first time since 2010. As the attached chart shows, Exxon’s capitalization was $352.6 billion through yesterday, compared with PetroChina’s $352.8 billion as of 1:36 p.m. on Thursday in Shanghai. The Chinese company’s A shares surged about 61 percent the past year, versus Exxon’s 14 percent drop. PetroChina was larger by value most recently at the close of trading on June 25, 2010, data compiled by Bloomberg show. The Shanghai Composite Index has gained about 88 percent over the past year, the best performance among major indexes tracked by Bloomberg, amid speculation the central bank will extend cuts in borrowing costs and on increased use of leverage to buy stocks. The Chinese yuan has declined 0.1 percent versus the dollar the past year even as most […]