Priceline already had bought $750 million in convertible bonds from Ctrip, in separate investments made in August 2014 and May 2015. An agreement between Ctrip and Priceline allows the Norwalk, Conn.-based company to hold up to 15% of Ctrip's American depositary shares. Priceline says it's now invested $1.9 billion in Ctrip convertible bonds and U.S. shares, and if fully converted would own about 45.5 million Ctrip shares. "Today's announcement reflects our ongoing commitment to the partnership between Ctrip and The Priceline Group, which began in 2012," Priceline CEO Darren Huston said in a statement . "The investment is an important part of our broader strategy to continue to grow our online travel business to, from and within China." Get the full story at Investors Daily