午评：沪指跌0.66%，半导体等板块走低，煤炭板块逆市拉升

Market Overview - The major stock indices in the market experienced fluctuations, with the Shanghai Composite Index falling below 3900 points again, and the ChiNext and STAR Market indices dropping over 1% [1] - As of the midday close, the Shanghai Composite Index decreased by 0.66% to 3888.08 points, the Shenzhen Component Index fell by 0.87%, the ChiNext Index declined by 1.1%, and the STAR Market Index dropped by 1.63% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 1.0582 trillion yuan [1] Sector Performance - Sectors such as semiconductors, pharmaceuticals, real estate, oil, and automobiles saw declines, while the coal sector experienced a strong rally [1] - Media and tourism sectors showed upward movement, with short drama games and shipping concepts becoming active [1] Market Sentiment and Future Outlook - Dongguan Securities indicated that the current market risk appetite is contracting, exhibiting a "high cut low" characteristic [1] - With the reduction of overseas disturbances, the domestic market is expected to enter a phase of positive catalysts, including the upcoming Fourth Plenary Session and the verification of third-quarter report performance [1] - The 20th Fourth Plenary Session is anticipated to focus on systematic deployment in areas such as new productivity, anti-involution, and green development, potentially creating thematic investment opportunities [1] - The third-quarter performance reports are expected to validate the advantages of new economic drivers, with market attention on economic indicators, which may again become the market's core focus [1]