Several weeks ago I predicted that we would soon see much smaller Cushing builds or even a Cushing or product draw. I went on to explain the market would misinterpret that signal. I think it's happening now.
Explanation follows...
The answer is never. It is ALREADY as full as it can get. They need to reserve a few empty tanks for blending operations and for other operational reasons. So reaching working CAPACITY
Think about what happens when something is FULL. No more can be added. So the size of additions falls to zero.
The smaller Cushing build and Gasoline draw reported by API are a very important signal that Cushing is ALREADY AS FULL AS IT CAN GET. No more can be
But the market won't interpret it that way. They will see the rate of additions going down and conclude "Great news! Cushing isn't filling up after all. The predictions were wrong!".
That makes no logical sense.
But the PUBLISHED working capacity is still quite a bit higher
@Big_Orrin and others have also pointed out that plenty of big players have a LOT to lose if Cushing were ever REPORTED to have reached
ENDTHREAD
Who believes all those contracts were just bought by buyers intending and capable of taking physical delivery?