Even in the $100 trillion market for bonds worldwide, one of the most persistent dilemmas facing potential buyers is a dearth of supply. Demand for debt securities has surpassed issuance five times in the past seven years, according to data compiled by JPMorgan Chase & Co. The shortfall is set to continue into 2015, with the New York-based firm predicting demand globally will outstrip supply by $400 billion as central banks in Japan and Europe step up their own debt purchases. The mismatch helps to explain why bond yields worldwide have fallen by more than half since the financial crisis in 2008 to a record-low 1.51 ... (full story)