4  A rise from a daily average of € billion in the week starting 1 September 2008 to € billion in the week starting 29 September 2008. 5  At the onset of the crisis in August 2007, the overnight interbank market actually saw an increase in volume. The average daily volume was € billion in the year prior to 9 August 2007.
It increased by 27%, to  2  BIS central bankers’ speeches  The US overnight unsecured interbank market also showed growing counterparty risk concerns following the Lehman bankruptcy, with poorly performing banks seeing an increase in the interest rates on their interbank loans.