Berkshire confirmed "the investment was made" in Paytm's parent company, One97 Communications and said Buffett was not personally involved in the deal.
Chinese robotics firms have gained market share domestically, but it they want to compete globally, "there is work to be done," says an analyst from McKinsey & Company.
Kok Hoi Wong of APS Asset Management says the overvaluation of JD.com is partly a result of some investors believing that the second largest e-commerce company in China "must" eventually make money.