Since August 2007, the U.S subprime mortgage crisis has not only threatened to the U.S. economy into a recession, but affected the global financial system. Furthermore, it brings a huge challenge to short-term and long-term development for global banking industry. Because the crisis has caused banks and other financial institutions became nervous about lending to other banks, banks generally lack of liquidity following the subprime mortgage crisis. Especially,banks depend heavily on the short-term money market or purchased funds market will be more likely to suffer liquidity problem in the future, and the Northern Rock is an example.
After subprime mortgage crisis, Northern Rock was unable acquire funding from money market because of credit freeze. In September 2007, Northern Rock was influenced by magnitude liquidity squeezes, and forced to a bailout from the Bank of England. It consequently suffered the bank run crisis. From Northern Rock crisis we can realize the importance of bank liquidity and diversified funding sources, though liquidity risk was rarely mentioned in the past. Swary (1986) also provided an explanation of the failure of the Continental Illinois National Bank in the U.S, which only had a small part of core deposit on its liability side. Thus, it is worth of discussing for bank liquidity risk.