As the E.U. was working out more loans for Greece in summer 2011, rating agencies looking at the state’s debt indicated that default would be pronounced should the decision of bond-holders to continue to hold Greek bonds be anything less than voluntary. Germany had been pushing for something less than voluntary so taxpayers would not have to bear so much of the risk and cost. France, doing the bidding of its banks, effectively used the rating agencies’ default-guidelines to insist that additional E.U. loans do not require then-current bond-holders to agree to later maturities. Given the extent of Greece’s debt-load relative to the state’s GDP, a private sector bond-holder, such as a bank, would naturally loose little time in getting out of holding Greek debt, even given the high interest rates (which reflect the risk).
The full essay is at "Essays on the E.U. Political Economy," available at Amazon.