Sovereign immunity has served as a partial substitute for bankruptcy protection, but it has encouraged a minority of creditors to pursue unorthodox legal remedies with spillover effects far beyond the debtor-creditor relationship. The attempt to enforce Argentina's pari passu clause in New York...

Ukraine is poised to restructure its debt, but Russia may hold the best cards in the negotiation. Russia bought $3 billion in Ukrainian Eurobonds in late 2013 to prop up a political ally, since-deposed. As Russian President Vladimir Putin himself has pointed out, these bonds have unique terms...