But, when they're "not sold", are they "retained" by the BuBa or by the German debt agency? And if they're "retained" by the BuBa, does the government get the cash for the bond issue? And if they do, and it's a secondary market sale, who's the intermediary?

To err is of course human. But to mess things up spectacularly, we need an elite — Yanis Varoufakis