as of the date on which such Bureau publishes the initial value of the Chained Consumer Price Index for All Urban Consumers for the month which precedes such calendar month by 4 months. (B) Determination for calendar month The C-CPI-U for any calendar month is the average of the C-CPI-U as of the close of the 12-month period ending with the month which precedes such calendar month by 4 months. (e) Suspension of holding period where diminished risk of loss