Swiss Stocks Plunge Most in Two Years; UBS, Credit Suisse Tumble

Swiss stocks sank the most in more than two years amid increasing concern that the European debt crisis is spreading and as the Federal Reserve’s pledge to keep interest rates low failed to boost optimism in the economy.

Financial shares led losses, with UBS AG and Credit Suisse Group AG, the nation’s biggest banks, sinking more than 3 percent. Adecco SA, the world’s largest supplier of temporary workers, slumped the most in seven years. Holcim Ltd., the world’s second-biggest cement maker, fell 6.3 percent.