If debt/gdp is around 150%, it takes a substantial haircut to get down to a "manageable" level of 60%. I'm no Citi anal ist, but even I can figure that out.
I assume Greek pension funds have been forced to buy this crap paper for years and have their books stuffed with it. Why do you think the Greeks are fighting so hard to avoid default?
Greek 2 years up another 100 basis points today, yielding 24%. It's over, whether it happens this week or Memorial Day or July 4, it's over. Just waiting for the bureaucrats to figure out a way to break it to the world.