The world has never been more heavily invested in US assets. The FT's Miles Johnson asks if this a warning signal that a deep and prolonged bout of greenback weakness is on its way<br /><br />► Subscribe to FT.com here: http://bit.ly/2r8RJzM<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
