https://www.cnbc.com/2018/08/02/petrochina-did-not-fare-well-after-reaching-1-trillion-in-market-cap.html > Before Apple hit $1 trillion in market value Thursday, there was Chinese oil giant PetroChina, which reached the milestone more than a decade ago. It did not fare too well after that. > PetroChina's market cap hit $1 trillion in 2007 following a successful debut on the Shanghai Stock Exchange on Nov. 5, 2007. PetroChina's Shanghai-listed shares nearly tripled at the open that day, with its Hong Kong-listed shares following them higher. (It had debuted on the Hong Kong exchange years earlier.)