Sudden rise in Central Bank Funds parked for safekeeping with the US Federal Reserve

  Central bank flight to Fed tops Lehman crisis
This $100 billion is "small potatoes" but it's a canary in the coal mine when the financial system is stressed.
Article by Ambrose Evans-Pritchard of The Telegraph.



Added Sept 4th:  Half a trillion dollars has moved from European banks to US banks in the last six months.  h/t Calculated Risk.
Added:  Less flamboyant graph with a few more data points