Financial markets have flashed a warning sign about the world economy. Subscribe to our channel here: https://goo.gl/31Q53F This week it became cheaper for the US and the UK governments to borrow for 10 years than for two years - something that has not happened since the run up to the financial crisis a decade ago. We speak to Nobel Prize-winning economist Joseph Stiglitz. Economics editor Ben Chu reports. Newsnight is the BBC's flagship news and current affairs TV programme - with analysis, debate, exclusives, and robust interviews. Website: https://www.bbc.co.uk/newsnight Twitter: https://twitter.com/BBCNewsnight Facebook: https://www.facebook.com/bbcnewsnight