Good thread. No one thing by itself caused the housing bubble and financial system collapse. Everything mentioned in this thread contributed, and something I will contribute that nobody has yet mentioned, executive compensation, and another, where was the DEMAND for all those junk mortgages coming from, it was the investment banks.
Causes of the housing bubble that have been mentioned and are all true:
1. Interest rates too low in 03-04, fed funds at 1% 3 years after the recession ended in 2001. M3 money supply growth was also far to high, growing at 8% annually when GDP was growing 2%.
2. Govt. encouraging some lending to marginally qualified borrowers through the Community Re-investment Act. (This did NOT mandate all the predatory mortgage companies to lend to anyone with a pulse, the CRA only affected "depositories", or banks).
3. Lack of regulation, the fed had the power to regulate the mortgage industry and it chose not to. Glass Stegall was repealed in 1999, allowing the combination of banking and brokerage functions in a single institution. Derivatives were a huge problem, with Credit Default Swaps (CDS) sinking AIG, and there was no regulation of those instruments. Nobody knew how many CDS were outstanding when it hit the fan.
4. Fraud in the appraisal industry. How could houses be appraised for twice as much as they sold for 5 years ago?
5. Fraud at the bond rating agencies, Moody's, Standard and Poors, and Fitch. They would money launder a thousand crap mortgages that were junk grade (no doc liar loans), and all of a sudden you had a AAA Collateralized Mortgage Obligation (CMO). Their justification, "since WWII there has never been a year when home values went down nationwide". Think. It happened just a few years before that in the 30's, it can surely happen again. Trees don't grow to the sky.
Causes not mentioned yet and also true:
6. Executive compensation. Dick Fuld at Lehman Bros. took out 450 million dollars in the 5 years prior to the company dying. Use of excessive leverage allowed the profits to zoom up, caused the stock to shoot up, and allowed Fuld to get rock star rich, while he was taking excessive risk that took the company bankrupt in the end. This was predictable. Go to wikipedia and read the statement of Stephen Roach in 2004, he was chief strategist at Morgan Stanley, the US would face economic Armageddon. Same is true for Chuck Prince at Citigroup and Stanley O'Neal at Merrill Lynch.
7. Relaxation of the Net Capital rule by the SEC in 2005, allowing the 5 investment banks to increase their leverage from 15:1 to 45:1. This increase in leverage allowed them to increase their profits (in a very risky way), drive the stock, allowed the CEOs to become rock star rich and it eliminated all 5 investment banks as such within 3 years. Bear Stearns failed and was acquired for a fraction of its former market cap, Lehman went bankrupt, Merrill was sold for about 1/3 of its former market cap (and BofA wishes it hadn't paid that much), and Goldman Sachs and Morgan Stanley converted themselves to traditional banks and put themselves under control of the fed.
Re: #7, read here:
http://www.nytimes.com/2008/10/03/business/03sec.html?_r=1
This is why we had to bail out the banks. The SEC let them take on too much debt (a control mechanism added after the great depression, and the old limit was 15:1, and it was relaxed to 45:1), and then did not follow through under Bush's appointee, Chris Cox (repub).