Wealthy homebuyers are finding global cities less welcoming - even hostile - to their cash. Luxury property prices in 45 global cities rose an average of just 1.1 per cent in the third quarter from a year earlier, the weakest annual gain since the end of 2009, according to a report from Knight Frank. They fell 4.4 per cent in New York, 3.9 per cent in London, and 10 per cent in Vancouver. It's no...