BEIJING/LONDON (Reuters) – The head of hedge fund manager Man Group Plc’s (EMG.L) China business has been taken into custody to help authorities in a probe into recent market volatility, Bloomberg reported on Monday, while separately a local financial reporter confessed on national TV to having spread false information that caused “panic and disorder”. Both are likely to jangle nerves in the financial industry as regulators try to find out who they think was behind China’s wild stock market rollercoaster ride in the past three months.