Investors have been unnerved for more than a year now about the future of the embattled euro zone. Bond yields for the zone's troubled peripheral countries soared, as investors lost faith that Greece and others would be able to pay back its huge debts. And as Europe's ongoing crisis seeped into bigger countries like Italy, yields skyrocketed, leaving the troubled nations to scramble for bailouts. On the opposite end of the spectrum, Germany's bond yields have now fallen below zero, meaning investors are not only willing to forgo returns on their money, but they will pay in order to keep it safe. Surprisingly, ... (full story)