Market Performance - The Shanghai 50 Index performed well today, increasing by 0.09%, while the CSI 300 Index decreased by 0.33% and the CSI 500 Index fell by 0.80% [4] - The North Exchange 50 Index showed strong performance, rising by 0.87%, while the Shenzhen Composite Index and the ChiNext Index both declined [4] - The oil and petrochemical, banking, real estate, home appliance, and media sectors performed well, with returns of 1.55%, 0.94%, 0.88%, 0.84%, and 0.56% respectively [8] Market Sentiment - At the close, 74 stocks hit the daily limit up, while 8 stocks hit the limit down [12] - Stocks that were limit up yesterday had a closing return of 2.18%, while those that were limit down had a return of -0.81% [14] - The sealing rate was 71%, down 7% from the previous day, while the consecutive sealing rate increased by 12% to 28% [16] Market Capital Flow - As of October 21, 2025, the margin trading balance was 24,443 billion yuan, with a financing balance of 24,273 billion yuan and a securities lending balance of 170 billion yuan [18] - The margin trading balance accounted for 2.5% of the total market capitalization, and margin trading represented 11.5% of the market turnover [20] Premium and Discount - On October 21, 2025, the oil and gas ETF had the highest premium at 0.97%, while the Innovation 100 ETF had the highest discount at 0.69% [24] - The average discount rate for block trades over the past six months was 6.15%, with a discount rate of 5.54% on the same day [26] Institutional Attention and Rankings - The stocks with the most institutional research in the past week included Huace Detection, Shiyuan Co., and Jiuzhou Pharmaceutical, with Huace Detection being researched by 118 institutions [31] - The top ten stocks with net inflows from institutional special seats included Rongxin Culture, Kebo Da, and Te Yi Pharmaceutical [34] - The top ten stocks with net outflows from institutional special seats included Lanfeng Biochemical, Hezhu Intelligent, and Haima Automobile [34]