寒武纪：9月12日指数权重调整，ETF砸盘或不实

Core Viewpoint - The adjustment of the weight of the stocks in the Sci-Tech Innovation Board 50 Index, particularly involving the popular stock Cambricon, has raised concerns about potential forced selling by passive funds due to its weight exceeding 10% in the index [1]. Group 1 - The Sci-Tech Innovation Board 50 Index will undergo a weight adjustment after the market closes on September 12, with Cambricon being a key stock affected [1]. - Recent significant price adjustments in Cambricon's stock have led to market speculation that this is linked to its index weight, which may compel passive funds to reduce their holdings [1]. - Concerns have been expressed regarding the possibility of large-scale ETF sell-offs, but the Shanghai Stock Exchange's investor education video clarified that such sell-offs may not accurately reflect the situation [1]. Group 2 - The Shanghai Stock Exchange emphasized that ETFs need to closely replicate the index, and significant deviations could harm their reputation, leading fund companies to avoid premature stock changes [1]. - Adjustments are typically made around the implementation date while considering market liquidity, allowing for a gradual and refined rebalancing to align with the index [1]. - Different fund managers may have varying operational rhythms, which can inherently provide a diversification effect in the market [1].