UBS Has $2 Billion Trading Loss; Man Arrested in London

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UBS AG, Switzerland’s biggest bank, said it may be unprofitable in the third quarter after a $2 billion loss from unauthorized trading at its investment bank.

London police arrested Kweku Adoboli, a UBS employee, in connection with the loss, according to a person with knowledge of the situation who requested anonymity. City of London police and UBS declined to identify the man.