That's because the government caused the subprime crisis you jackass, the government made laws forcing banks to lend to unqualified and less qualified borrowers so they could get a mortgage and own a home. Bush called that mess out in 2003 and was subsequently ignored.
New Agency Proposed to Oversee Freddie Mac and Fannie Mae - The New York Times
''These two entities -- Fannie Mae and Freddie Mac -- are not facing any kind of financial crisis,'' said Representative Barney Frank of Massachusetts, the ranking Democrat on the Financial Services Committee. ''The more people exaggerate these problems, the more pressure there is on these companies, the less we will see in terms of affordable housing.''
Hurr durr. The banks were given lemons by the Feds, and subsequently not long after, found a way to make lemonade with mortgage securities. Banks were not happy about the lending rule at first.