Not long ago, Hong Kong’s share-sale market was a symbol of China’s slowdown: Deal books were thin, investor sentiment was sour and bankers were fleeing the industry. This year, the script has flipped.Share sales nearly quadrupled to more than $73 billion through initial public offerings, placements and block trades. For the first time since 2013, that made Hong Kong the No. 1 fundraising spot in Asia, ranking just behind the US globally. The city has been at the front of a dealmaking boom across the contin ...