三大指数集体下挫，有色板块大幅调整

Group 1 - A-shares experienced a collective decline on September 18, with all three major indices falling over 1%, specifically the Shanghai Composite Index down 1.15%, the Shenzhen Component down 1.06%, and the ChiNext Index down 1.64% [1] - The total trading volume exceeded 3 trillion yuan, indicating an increase in trading activity, with 1,029 stocks rising and 4,304 stocks declining [1] - The public utilities sector showed strong performance, with notable gains from Yunnan Tourism up 10.05%, Qujiang Cultural Tourism up 10.01%, and Fulongma up 9.99% [1] Group 2 - Analysts from Huatai Securities noted that the Federal Reserve's interest rate cut of 25 basis points was in line with market expectations, with two more cuts anticipated within the year [2] - The market is expected to experience increased volatility following the Fed's rate cut, as the Shanghai Composite Index has shown weaker performance compared to the Shenzhen Component and ChiNext Index since late August [2] - The upcoming September Loan Prime Rate (LPR) announcement is highly anticipated, especially after the LPR remained unchanged for three consecutive months following a cut in May [2]