At the end of January 2009 , excess reserve balances within the Federal Reserve System stood at $793 billion .
Less than two weeks later on February 11 , 2009 , total reserve balances had fallen to $603 billion .
At the end of January 2009 , excess reserve balances within the Federal Reserve System stood at $793 billion but less than two weeks later on February 11 , 2009 , total reserve balances had fallen to $603 billion .