Group 1 - The Hang Seng Index Company announced the renaming of the Hang Seng Hong Kong Stock Connect Software and Semiconductor Index to the Hang Seng Hong Kong Stock Connect Software Theme Index, effective December 16, 2025 [1] - The number of constituent stocks will be fixed at 40, with the addition of four stocks: Reading Group (00772), Qutoutiao (00917), Meitu (01357), and iClick Interactive Asia Group (01860) [1] - Several stocks will be removed from the index, including ASMPT (00522), Semiconductor Manufacturing International Corporation (00981), and Hua Hong Semiconductor (01347) [1] Group 2 - The index calculation method will be updated, including changes to the index objectives, stock selection criteria, industry requirements, and constituent stock selection methods [1] - New thematic requirements, buffer zones, and fast inclusion rules will be introduced as part of the updated calculation method [1]