At 9:30 a.m. today, trading floors across the City of London erupted. Outbursts of obscenities and confusion followed the Swiss central bank’s surprise decision to abolish its three-year-old policy of capping the Swiss franc against the euro, according to traders in London’s financial district. The U-turn sent the franc as much as 41 percent up against the euro, the biggest gain on record, a move that one trader estimated may cause billions of dollars of losses for banks and their customers. Dealers at banks including Deutsche Bank AG (DBK), UBS Group AG (UBSG) and Goldman Sachs (GS) Group Inc. battled to process ... (full story)