[ad_1] (Bloomberg) — Chinese oil giant PetroChina Co.’s market value briefly surpassed that of the nation’s top lender, making it at one point the second-largest listed company in mainland China.…

[ad_1] (Bloomberg) — Berkshire Hathaway Inc. retreated on Monday after touching a record high that pushed the market value of Warren Buffett’s conglomerate even closer to $1 trillion.  The Omaha,…