Alibaba (BABA) announced Sunday that former CEO and chairman Daniel Zhang will also exit as the head of Alibaba's cloud business, signaling a more-abrupt transition for the Chinese internet giant. X BABA stock fell solidly in Hong Kong trading. Eddie Wu, an Alibaba co-founder, is now acting head of the cloud unit. Wu also officially succeeded Zhang as Alibaba Group CEO. Brooklyn Nets owner Joe Tsai took over as chairman. Zheng announced in June that he would step down as head of the overall company, but he was expected to lead the cloud unit long term. That's part of a...