The world’s housing markets have become remarkably synchronised, according to  International Monetary Fund research that warns that local property prices may be vulnerable to unexpected foreign shocks. A study of 40 countries and 44 major cities across advanced and emerging economies shows there has been a simultaneous upswing since the global financial crisis, driven by ultra-easy monetary policy and a pick-up in investor activity led by Amsterdam, Melbourne, Sydney, Toronto and Vancouver. The findings,…