LONDON  — London police have identified that man arrested in alleged rogue trading at UBS as 31-year-old Kweku Adoboli.

Swiss banking giant UBS said Thursday that a rogue trader caused it an estimated loss of $2 billion, stunning a beleaguered banking industry that has proven vulnerable to unauthorized trades.

Switzerland’s largest bank warned that it could report a loss for the entire third quarter as a result of the rogue trade, sending its shares plummeting.