For investors around the world looking at Greece, there was but one question Sunday: What is going to happen when the markets open? On Sunday night, the prime minister, Alexis Tsipras, said in a televised address that Greece’s banks and stock market would be closed on Monday, as Athens tries to avert a financial collapse. But the question of what happens when the markets do open is particularly acute for the hedge fund investors — including luminaries like David Einhorn and John Paulson — who have collectively poured more than 10 billion euros, or $11 billion, into Greek government bonds,...
