Hong Kong Exchanges and Clearing (HKEX) is expanding into the index business with plans to launch more proprietary benchmarks and related investment products, as traditional market gauges have lagged regional peers during the artificial intelligence-driven technology rally.The operator of Hong Kong’s stock exchange will debut the first exchange-traded fund (ETF) tracking its HKEX Tech 100 Index on Friday. The index, launched on December 9, tracks the 100 largest technology companies listed in...