The Greek debt restructuring of 2012 stands out in the history of sovereign defaults. It achieved very large debt relief — over 50 percent of 2012 GDP — with minimal financial disruption, using a combination of new legal techniques, exceptionally large cash incentives, and official sector pressure on key creditors. But it did so at a cost. The timing and design of the restructuring left money on the table from the perspective of Greece, created a large risk for European taxpayers, and set precedents — particularly in its very generous treatment of holdout creditors — that are likely to make future debt restructurings in Europe more difficult.