Seeking Alpha: Tullow Hasn't Forgotten How To Find Oil, And The Shares Look Too Cheap

Exploration-focused oil and gas companies can give investors a wild ride. That has definitely been the case at Britain's Tullow Oil ( T...

Investopedia: New Gas Prices Help PetroChina, But Multiple Challenges Remain

Not unlike Petrobras (NYSE: PBR ), PetroChina (NYSE: PTR ) finds itself continually put into losing situations by its government. The Ch...