Cambricon(SH:688256) Shang Hai Zheng Quan Bao·2025-09-16 00:02Group 1 - The recent adjustment of the STAR 50 index sample stocks has caused significant market fluctuations, particularly affecting the stock price of Cambrian, which dropped over 14% on September 4 [2][3] - The adjustment, effective after the market close on September 12, limits the weight of individual samples to no more than 10% and the top five samples to a combined weight of no more than 40% [2] - As of September 2, Cambrian's weight was 15.42%, indicating an expected outflow of approximately 10 billion yuan from Cambrian due to the index adjustment [2][4] Group 2 - The rapid growth of index funds over the past two years has significantly increased their influence on stock prices, with Cambrian's top ten shareholders including multiple ETFs with a combined market value exceeding 17 billion yuan [5][6] - The scale of ETFs has been rising, with 56 ETFs exceeding 10 billion yuan in size as of September 12, compared to 44 at the end of the previous year [6] - The interaction between index funds and the market is becoming a normalized issue for investors, particularly during index adjustments, which can lead to significant stock price movements [7][8]