The sub prime crisis refers to the collapse of sub prime mortgage markets in USA due to the sharp rise in foreclosures beginning in 2006 and led to the failure, merger and government bailout of leading American financial institutions and enterprises such as Bear Stears, AIG, Fannie and Freddie, Merrill Lynch, Citi Group, Lehman Brothers and etc. The sub prime crisis triggered a financial crisis which rapidly spread to other countries around the world and became a global financial crisis in 2008. It affects every country and everyone through the global nature of the financial system. In late 2008, the global financial crisis began to affect the real economy and triggered a global economic crisis.