Wealth September 8, 2016updated 26 Sep 2016 10:56am Billionaire makers: The cities growing the world’s wealthiest By Spear's New York has topped the list of cities where the most billionaires were born, according to analysis by WealthInsight and Spear’s magazine. Content from our partners HSBC Global Private Banking: Revisiting your wealth plan as uncertainty abounds Proposed non-dom changes put HNW global mobility in the spotlight Meet the females leading in the FTSE Related Wealth The biggest billionaire family feuds Wealth Billionaires should pay 2% wealth tax, say G20 ministers Wealth Blackstone buoyed by private wealth surge Spear's