Didi Kuaidi- Ola deal heats up taxi app market By: CNBC.com News September 28, 2015 at 02:08 AM EDT Chinese taxi-hailing app Didi Kuaidi has invested in India's largest ride-hailing app, Ola, according to Reuters. Read More >> Related Stocks: Alibaba Group Holding Ltd Baidu.com SP ADR Softbank Corp ADR