The California Public Employees' Retirement System portfolio has lost 31.1 percent of its value since peaking last fall, a staggering $81.4 billion drop. CalPERS officials say a "rainy day fund" is helping to defray the losses - for now. But if the market slump continues, they will hit up state and local employers for more money. That's a painful prospect as California struggles through a fiscal emergency and municipalities cope with the foreclosure crisis and economic downturn.

Courtesy of sfgate.com