Turquoise Hill holder Pentwater ups stake, rejects Rio Tinto share bid

Pentwater Capital Management LP, the second-largest investor in Turquoise Hill Resources (TSX: TQR) has increased its stake in the Canadian company while again rejecting Rio Tinto (NYSE: RIO; LSE: RIO; ASX: RIO)'s $43-per-share offer for the 49% of the miner it...