The Kakao messaging application and the Kakao T taxi booking application are seen on a mobile phone in this illustration photo March 13, 2018. South Korean President Yoon Suk Yeol told a public meeting on Wednesday that the market behaviour of Kakao Mobility's taxi-hailing service was monopolistic and required a review. Its regulatory troubles escalated last month when one of its executives was arrested for suspected stock market manipulation during its acquisition of K-Pop agency SM Entertainment (041510.KQ). Last week, regulator Financial Supervisory Service (FSS) said it will refer Kakao, its affiliate Kakao Entertainment and executives involved in the SM Entertainment acquisition to public prosecutors for suspected violation of the Capital Markets Act. "It is necessary to pay attention to legal risks, as problems may arise in the status of KakaoBank depending on the probes' results."

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Persons: Thomas White, Yoon Suk Yeol, Kakao, Oh Dong, hwan, Joyce Lee, Miyoung Kim, Sam Holmes Organizations: REUTERS, Kakao Corp, Naver Corp, Reuters, Mobility, SM Entertainment, Financial Supervisory Service, Kakao Entertainment, Pension Service, NPS, Samsung Securities, Thomson Locations: SEOUL, Korean, Kakao