Originally Posted by
Diurdi
That's a really meager explaination of why it happened. Your explaination sort of gives us insight into why some financials crashed, but not why and how the bubble was created.
Banks have been able to engage in that sort of activity for decades. They could have created these shady MBS bundles at any time before. Why did this suddenly become a problem?
The answer lies in US government housing policy. Their objective was to increase homeownership in the US, especially among those who could not get a mortgage. Their policy was thus to somehow provide mortgages to people who could not normally recieve them from banks for various reasons. So the HUD used its power over GSE's Fannie Mae and Freddie Mac, as well as the Federal Housing administration and Subrime Mortgage lenders to encourage greater subrime and other high risk lending. The GSE's were government backed so they could take on incredibly risk as the taxpayer would be ultimately on the hook anyway. Furthermore the newly empowered Community Reinvestment Act forced lenders to lend to persons who they normally would not lend to due to higher risk.
A very low Federal Funds Rate (1%, set by the Federal Reserve) in the early 00's fueled borrowing and pushed investors seeking higher returns into buying these packaged mortgages.
So the banks were pushed by the government to lend to people who could not have afforded loans under normal circumstances. Alan Greenspan assured the markets and the banks that he would save the day if things got hairy, by providing liquidity and keeping low interest rates. The "Greenspan put" created an athmosphere of moral hazard, which pushed risk taking even further.
In the end of the day, it was a classic government policy created bubble. The reason the financials were so hard hit though, was due to shadow banking and other issues of risk management (thanks Greenspan), which destabilized the system but didn't cause the housing bubble.