Abstract: HSCEI June 2026 added Hansoh Pharma and Akeso and deleted Sunny Optical and Haier Smart Home. All event windows through the fourth post-implementation week are complete. ADDs were mixed in the first implementation week, then both rallied in weeks two to four. DELETEs broke the historical positive-bridge rebound pattern. Sunny Optical drove the miss with a -12.8% first-week return.
LI NING, Sunny Optical, HANSOH PHARMACEUTICAL, CHINA GAS, HAIER SMARTHOME, BILIBILI, AKESO
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