Economics | Ed Zhang

Corruption always has a price tag. But more often than not, the invisible price runs much higher than the visible one.

PetroChina's market value fell $1 billion on the Hong Kong Stock Exchange on Aug 28, after graft allegations were leveled against officials of CNPC, PetroChina's parent company and one of the three State-owned oil and gas giants, and once listed as the world's largest industrial corporation.