As Switzerland's central heater home in yiwu bank imposed a limit on the franc's appreciation against the euro on Sept. 6, rader Kweku Adoboli's Facebook profile cheap plastic trays had a plea for his friends: "Need a miracle." Just over a week later, at 3:30 a.m. yesterday, police in London arrested the 31-year-old Adoboli on suspicion of fraud by abuse of position. UBS told investors less than five hours later that "unauthorized yiwu china map trading by a trader" it didn't identify caused a $2 billion loss. Adoboli worked on the bank's Delta One desk, a unit that handles trades for clients, typically helping them to speculate on or hedge the performance of a basket of securities. It also takes risks with yiwu fair the bank's own money in arranging trades. It was the same kind of desk as the one worked by who triggered a 4.9 billion-euro loss ($6.8 billion) for's SA in January 2008. "It couldn't come at a worse time for UBS," said Fred Ponzo, a former trader at Societe Generale and capital markets adviser at Greyspark Partners in "The thing is, it's very hard to go through the fail-safes by error. The only way to dig a hole this big is by design. You have to ask the question that if this is a $2 billion hole, is this is a failure of technology and risk management?" The arrest as global regulators are pressing banks to curb their proprietary yiwu fair 2011 trading is likely to revive calls for financial institutions to increase controls on risk and separate their from their retail businesses. It may also force Chief Executive Officer 67, to abandon further expansion of UBS's investment bank. The loss is "the final straw in UBS's ambitious build-out to a tier-one investment bank," wrote JPMorgan promotional products Chase & Co. analysts led by Kian Abouhossein in a note to clients yesterday. "First, we think we'll likely see management changes within UBS's investment bank. Second, we expect UBS will come under material pressure from shareholders" and regulators to review its investment banking division. The bank, s largest, fell the most since March 2009 dollar store in Swiss trading following the announcement. UBS tumbled 11 percent to 9.75 francs, bringing its drop this year to 36 percent, compared with a 33 percent decline in the 46-company Bloomberg European Banks and Financial Services Index. Moody's Investors Service put credit ratings china shoes wholesale for UBS under review for possible downgrade. The examination will focus on "weaknesses in the group's risk management and controls that have become evident again," Moody's said in a statement. The loss itself "would be manageable for the group given its sound liquidity and wholesaler capital position." UBS asked British police at 1 a.m. yesterday to arrest Adoboli, before alerting the U.K. financial regulator or prosecutors, according to wholesale overstock from China two people familiar with the matter. The Financial Services Authority was notified shortly after the police, and prosecutors at the weren't contacted at all, according to the two people, who asked not to be identified because the investigations are private. UBS declined yesterday to say how the trading allegedly lost the bank $2 billion. Gruebel called the loss "unauthorized" and "distressing" in an e-mail to employees, without giving details. No client positions were affected, the Zurich-based company said in the statement, issued on the third anniversary of s collapse.