Hedge fund manager Marc Mezvinsky had friends in high places when he bet big on a Greek economic recovery, but even the keen interest of his mother-in-law, then-Secretary of State Hillary Clinton, wasn't enough to spare him and his investors from financial tragedy. In 2012, Mezvinski, the husband of Chelsea Clinton, created a $325 million basket of offshore funds under the Eaglevale Partners banner through a special arrangement with investment bank Goldman Sachs. The funds have lost tens of millions of dollars predicting that bailouts of the Greek banking system would pump up the value of the country’s distressed bonds....