Systemic risk is the possibility of an event at a company, entity, or group which can trigger a severe instability or can collapse the entire financial system, entire market, entire industry or economy. In the financial crisis of 2008 systemic risk was the major contributor. Companies which are considered to be a systemic risk were called too big to fail. These companies were large relative to their respective industries and were contributing a significant role in the economy. Some example of systemic risk Lehman Brother�s size and integration into the United State economy made it a source of systemic risk. When Lehman Brother�s collapsed, it created problems throughout the financial system and economy. After the collapse businesses and individuals were not able to get loans, or they can get loans if they were extremely creditworthy. That time AIG was also suffering from serious financial problems and was a source of systemic risk. The U.S. government did not bail out Lehman Brothers and decided to bail out AIG with loans of more than $180 billion. It prevents the company from going bankrupt. According to regulators and analysts, the bankruptcy of AIG would have caused the collapse of numerous other financial institutions.