A week ago the Fed announced its latest expansion to its Fixed-Rate Reverse Repo facility, which boosted the maximum allotment per counterparty to a whopping $3 billion from $1 billion (initially this was "only" $500 million), to wit: "this week the Committee authorized the Desk to modify the terms of the exercise.  The maximum allotment cap will be increased to $3 billion per counterparty per day from its current level of $1 billion per counterparty per day, effective with the operation on Monday, December 23, 2013." Some wondered why.