Published: 10:00am, 7 Dec, 2015 Updated: 9:02pm, 7 Dec, 2015
CITIC Securities has confirmed that it can not contact its top two investment bankers , dong Jun and Yan Jianlin , after it was reported that both might be under investigation , following the rout on China 's stock market over the summer . News magazine , Caixin , reported the pair were taken away by authorities on Friday , making them the latest executives to go missing from CITIC as the Chinese authorities continue their investigations . Two other big Chinese securities firms are part of the investigation , which may result in an attempt by the ruling Communist Party to deflect funds for the Shanghai index 's 30 % drop from its peak ; state media had encouraged its people to buy stocks , creating a bubble .