A prolonged period of elevated long-term bond yields is ramping up borrowing costs around the world. That in turn affects the cost of mortgages, credit card debt, car loans and other borrowing, squeezing households and companies and weakening economic activity. Bloomberg's Head of Economics and Government Stephanie Flanders joins Caroline Hepker to discuss what's behind the rise, how it changes the global economy and if some countries are at risk a bond doom loop.