That changed on Tuesday afternoon when, as part of a "unprecedented" and temporary (yeah, sure) package meant to ease collateral measures to "mitigate the tightening of financial conditions across the euro area" (read push stock prices higher), the ECB said it would grant a waiver to accept Greek sovereign debt instruments as collateral in Eurosystem credit operations. In short, the debt which as everyone found out 5 years ago was worthless excluding its ECB backstop, will now serve as money good collateral for countless banks which borrow against Greek bonds.