Changes

"Option adjustable rate mortgages" (nick-named "Pick-A-Pay") allowed borrowers to vary their monthly payments; they could be so so small they did not cover their interest charges. That meant the total principal grows over time, compared to normal mortgages where the debt owed shrinks over 30 years to zero and the borrower owns the house free and clear. By 2008 banks sold these dangerous "option adjustable rate" mortgages to two million customers.  They made sense if and only if the price of houses kept going up and the borrower could sell it in a year ot two at a huge profit. But if house prices declined, the borrower could stop paying and the bank was left with the loss.

"Option adjustable rate mortgages" (nick-named "Pick-A-Pay") allowed borrowers to vary their monthly payments; they could be so so small they did not cover their interest charges. That meant the total principal grows over time, compared to normal mortgages where the debt owed shrinks over 30 years to zero and the borrower owns the house free and clear. By 2008 banks sold these dangerous "option adjustable rate" mortgages to two million customers.  They made sense if and only if the price of houses kept going up and the borrower could sell it in a year ot two at a huge profit. But if house prices declined, the borrower could stop paying and the bank was left with the loss.

===Selling mortgage packages to big investors===

===Selling mortgage packages to big investors===

Americans owed some $10 trillion on their mortgages, most of which were sound with payments made on time. However financiers bundled the mortgages into very complicated packages called "'''collateralized debt obligations''''<ref> That is, homeowners were obligated to pay the debts and the collateral behind them was the physical house.</ref> or CDOs. Hundreds of billions of dollars worth of CDO's were sold to banks, pension funds and financiers in the U.S. and Europe. Generally they borrowed cash to buy the CDOs.  The risk was that if the CDO's declines in value, they would not be able to repay those loans.  To minimize the risk, companies sold insurance called "credit default swaps" ('''CDS''') to guarantee payment of the CDOs. The largest seller was [[American International Group]] ('''AIG'''), the world's largest insurance company. The CDOs and CDS were especially attractive because they were not regulated by the government; experts are not sure how many trillions of dollars are involved.

Americans owed some $10 trillion on their mortgages, most of which were sound with payments made on time. However financiers bundled the mortgages into very complicated packages called "'''collateralized debt obligations''''<ref> That is, homeowners were obligated to pay the debts and the collateral behind them was the physical house.</ref> or CDOs. Hundreds of billions of dollars worth of CDO's were sold to banks, pension funds and financiers in the U.S. and Europe. Generally they borrowed cash to buy the CDOs.  The risk was that if the CDO's declines in value, they would not be able to repay those loans.  To minimize the risk, companies sold insurance called "credit default swaps" ('''CDS''') to guarantee payment of the CDOs. The largest seller was [[American International Group]] ('''AIG'''), the world's largest insurance company. The CDOs and CDS were especially attractive because they were not regulated by the government; experts are not sure how many trillions of dollars are involved.

Many mortgages were held by mortgage companies like [[Countrywide]] and [[Washington Mutual]], as well as investment banks such as [[Bear Stearns]], [[Merrill Lynch]], [[Lehman Brothers]], [[Morgan Stanley]] and [[Goldman Sachs]], as well as commercial banking chains like [[Wachovia]] and [[Bank of America]], which have thousands of local offices.

Many mortgages were held by mortgage companies like [[Countrywide]] and [[Washington Mutual]], as well as investment banks such as [[Bear Stearns]], [[Merrill Lynch]], [[Lehman Brothers]], [[Morgan Stanley]] and [[Goldman Sachs]], as well as commercial banking chains like [[Wachovia]] and [[Bank of America]], which have thousands of local offices.

==Bubble bursts==

==Bubble bursts==