 Buffett akaisa mari muPetroChina Company Limited uye mukufamba kusingawanzo, akaisa chirevo pawebsite yeBerkshire Hathaway achitaura kuti nei aisazoisa mari pamusoro pekubatana kwayo nehondo yevagari vemuSudanizvo zvakakonzera kuti Harvard ibvise mari yayo. Akazotengesa chikamu ichi nokukurumidza pashure pacho, achimununura pamabhiriyoni emadhora angadai akarasikirwa nawo kudai akaramba ari mukambani iyi pakati pokudonha kukuru kwemitengo yemafuta kwakatanga muzhizha ra2008. 