A股午评：沪指站稳4000点，北证50涨超2%，电池、量子科技板块领涨

Market Overview - The A-share market showed mixed performance with the Shanghai Composite Index rising by 0.06% to 4018.86 points, reaching a new high in over 10 years [1] - The Shenzhen Component Index fell by 0.02%, and the ChiNext Index decreased by 0.23% [1] - The North Star 50 Index increased by over 2% [1] Trading Volume - The total trading volume in the Shanghai, Shenzhen, and Beijing markets reached 1.5591 trillion yuan, an increase of 125 billion yuan compared to the previous day [1] - Over 3200 stocks in the market experienced declines [1] Sector Performance - Leading sectors included batteries, steel, and quantum technology [1] - The precious metals and coal mining sectors saw the largest declines [1] - CPO concept stocks generally retreated, with New Yi Sheng dropping over 6% due to Q3 performance falling short of expectations [1] ETF Insights - Food and Beverage ETF (Product Code: 515170) saw a decline of 1.55% over the past five days, with a PE ratio of 19.99 and a net outflow of 31.81 million yuan [3] - Gaming ETF (Product Code: 159869) decreased by 1.44% in the last five days, with a PE ratio of 41.74 and a net inflow of 110 million yuan [4] - Sci-Tech 50 ETF (Product Code: 588000) increased by 6.02% recently, with a high PE ratio of 168.62 and a net outflow of 63.32 million yuan [4] - Cloud Computing 50 ETF (Product Code: 516630) rose by 7.03%, with a PE ratio of 128.98 and a minimal net inflow of 47,500 yuan [4]