PSX, China sign share-purchase accord KARACHI: Pakistan’s soaring stock exchange will introduce derivatives trading from the middle of 2017, the bourse’s managing director said, announcing the move weeks after a Chinese-led consortium took a strategic stake. Nadeem Naqvi, managing director of Pakistan Stock Exchange told Reuters the introduction of derivatives, as well as plans for listing of infrastructure bonds, were part of efforts to boost liquidity in the market and lure...