NEW YORK (TheStreet) -- Greece has reached a tipping point. Talks between the country and its creditors failed Friday, leading the country to effectively default on 1.5 billion euros it owed the International Monetary Fund. Greece's banking system and financial market have been closed for the week, and capital controls put in place. Despite frantic attempts to reach a solution, Greece's future now depends on a referendum in which voters will choose between acceding to international demands for reforms in exchange for bailout loans or rejecting them.