CNPC seeks to revive bid for YPF

China National Petroleum Corp (CNPC) is seeking to revive a failed bid for the Argentinian unit of Spanish energy firm Repsol-YPF in a deal that could be worth up to US$17 billion. CNPC may attempt to buy up to three-quarters of YPF, while rival CNOOC is said to be interested in buying a 25% stake. [...]