Briefly explain why the decline in housing prices led to a major financial crisis

What will be an ideal response?

Many of the mortgage loans that had been given out during earlier expansion were of poor quality. Many of the borrowers had taken too large a loan and were increasingly unable to make mortgage payments. mortgage backed securities were so complex that their value was nearly impossible to assess. Not knowing the quality of the assets that other banks had on their balance sheet, banks became very reluctant to lend to each other for fear that the bank to which they lent might not be able to repay. The credit market froze up. Unable to borrow, and with assets if uncertain value, many banks found them in trouble. The bankruptcy of Lehman Brothers put other banks at risk of going bankrupt as well. The whole financial system was in trouble.