“There has been much confusion in the past several months relating to the US debt ceiling, and specifically the fact that total debt subject to the limit has been at just $25 million away from the full limit since late May.
As we explained first in January 2011 , there is nothing sinister about this. Any time the Treasury hits its physical debt cap, it activates its available “emergency measures” which include such money releasing options as disinvesting the Civil Service Fund, Suspending reinvestment in the G-Fund, Selling securities from the Exchange Stabilization Fund, and others, which cumulatively free up around $300-$350 billion. In essence the “emergency measures” act like a revolving credit facility that is slowly but surely being drawn down. Add to that sporadic cash creation over the past few months from cash inflows from the GSEs and one can see why the US has been able to be in breach of the debt ceiling for as long as it has. And why it still has just under two months of capacity.”