UBS Reports $2 Billion Loss by Rogue Trader

8:43 a.m. | Updated UBS said on Thursday that a rogue trader in its investment bank had lost $2 billion, a fresh blow to the beleaguered Swiss bank. The police in London have arrested a European equities trader, Kweku Adoboli, in connection with the case, according to a person with direct knowledge of the situation who was not authorized to speak publicly.