► Subscribe to FT.com here: http://bit.ly/2r8RJzM<br /><br />The European Central Bank has kept in place a pledge to step up its €60bn-a-month quantitative easing programme, if necessary. The FT's economics correspondent Gemma Tetlow explains what it would take for the ECB to start rolling back monetary stimulus. <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
