2008-2009 accounting accountingfederalnationalmortgageassociation accountingfreddiemac(firm) debts economicstabilization finance financefederalhomeloanmortgagecorporation financefederalnationalmortgageassociation financialinstitutions foreigninvestments freddiemac(firm) globalfinancialcrisis governmentguaranty governmentpolicy housing housingpolicy investmentbanking loans mortgage-backedsecurities mortgageloans public secondarymortgagemarket statesupervision unitedstates