Which of the following events contributed to the 2007 financial crisis? Check all that apply. Interestingly, most of these investors chose to remain ignorant of the low risk of default involved in such investments. Mortgage-backed securities, or packages of mortgages bundled together, were sold to investors, who would become the payments for these mortgages. Oil prices were rising, generating surplus funds for oil-rich countries that were investing in the liquid bond markets of the United States. The Federal Reserve responded to the 2001 recession with an expansionary monetary policy, keeping interest rates low