Buffett, Berkshire’s chairman and chief executive, has
previously warned about the risks of insuring municipal bonds. In his annual
letter to shareholders in 2009, he said public officials may be tempted to
default on bonds whose payments are guaranteed by insurance companies rather
than push through needed tax increases. He said guaranteeing municipal bonds
against default “has the look today of a dangerous business.”
Local governments rely on the $2.8 trillion municipal bond
market to raise money for construction projects and fund other budget items. The
financial crisis and recession battered governments across the U.S. by cutting
into tax collections and causing pension-fund losses. Some governments failed to
set aside enough money to cover retirement benefits promised to employees, which
may place increasing strain on public finance.