Hong Kong maintained its lead as the Asian city with the most billionaires last year, though mainland Chinese cities were quickly catching up thanks to wealth accumulation from the artificial intelligence boom, according to New York-based data company Altrata. Globally, Hong Kong ranked second in number of billionaires behind New York, while Beijing and Shenzhen secured spots among the top 15 cities, according to the latest data from Altrata. While Hong Kong’s aggregate billionaire net worth...