Hong Kong’s stock index compiler will add 10 fast-growing companies with at least HK$500 million (US$64 million) in annual sales into the city’s technology-focused benchmark in a bid to revitalise an index that has missed out on artificial intelligence-driven gains. The threshold is among a set of new measures Hang Seng Indexes Company will use to reform the Hang Seng Tech Index, which is referred to as Hong Kong’s answer to the Nasdaq but has lost its shine relative to global peers, falling 23...