The provided content does not include any specific quantitative models or factors, nor does it detail their construction, evaluation, or backtesting results. The documents primarily focus on market performance, sector analysis, investor sentiment, ETF premiums/discounts, block trading, and institutional activity. These are descriptive analyses and do not involve the development or testing of quantitative models or factors.

The provided content does not contain any quantitative models or factors, nor does it include their construction, evaluation, or backtesting results. The documents primarily focus on market performance, sector analysis, ETF premiums/discounts, institutional activity, and other market-related data. There are no references to quantitative models or factors in the provided text.

Market Overview - The A-share market showed mixed performance today, with the Shanghai Composite Index rising by 0.32% to close at 3472.32 points, while the Shenzhen Component Index fell by 0.25% to 10508.76 points. The ChiNext Index decreased by 0.36% to 2156.32 points [1] - Overall, there were 4118 stocks that declined, 1169 that increased, and 129 that remained unchanged across the market. The total trading volume in the Shanghai and Shenzhen markets reached 14285 billion yuan, an increase of 1188.11 billion yuan compared to the previous trading day [1] Industry Performance - Among the Shenwan first-level industries, sectors such as banking, media, comprehensive services, public utilities, steel, and coal led the gains, while industries like beauty care, non-ferrous metals, basic chemicals, light manufacturing, environmental protection, and machinery equipment experienced declines [1] Sector Highlights - The top-performing concept sectors today included cross-border payments, central enterprise banks, digital currency, hydropower, selected banks, vitamins, financial technology, thermal power, and selected electric power stocks. Other notable sectors were "East Data West Calculation," innovative drugs, semiconductor equipment, biotechnology, and online gaming [1]

Market Overview - The A-share market showed mixed performance today, with the Shanghai Composite Index rising by 0.39% to close at 3457.75 points, while the Shenzhen Component Index increased by 0.11% to 10476.29 points. However, the Sci-Tech Innovation 50 Index fell by 0.86% to 994.80 points, and the ChiNext Index decreased by 0.24% to 2147.92 points. Overall, 2628 stocks rose, 2542 fell, and 247 remained unchanged across the market [1]. - The total trading volume in the Shanghai and Shenzhen markets was 14660 billion, a decrease of 208.42 billion compared to the previous trading day [1]. Industry Performance - Among the Shenwan first-level industries, sectors such as comprehensive, pharmaceutical biology, banking, non-ferrous metals, public utilities, and building materials led the gains, while computer, retail, telecommunications, media, power equipment, and real estate sectors experienced declines [1]. Sector Highlights - The top-performing concept sectors today included China Shipbuilding System, innovative drugs, antibiotics, vitamins, generic drugs, low-priced stocks in the ChiNext, hydropower, biotechnology, advanced packaging, superhard materials, pet economy, CRO, medical material exports, selected banks, and brain-computer interfaces [1].

证券研究报告 | 2025年05月22日 市场情绪：今日收盘时有 51 只股票涨停，有 18 只股票跌停。昨日涨停股票 今日收盘收益为 1.29%，昨日跌停股票今日收盘收益为-4.04%。今日封板率 54%，较前日下降 19%，连板率 23%，较前日下降 10%。 市场资金流向：截至 20250521 两融余额为 18112 亿元，其中融资余额 17990 亿元，融券余额 122 亿元。两融余额占流通市值比重为 2.3%，两融交易占市 场成交额比重为 8.2%。 折溢价：20250521 当日 ETF 溢价较多的是金融 ETF，ETF 折价较多的是 MSCIESGETF。近半年以来大宗交易日均成交金额达到 14 亿元，20250521 当 日大宗交易成交金额为 16 亿元，近半年以来平均折价率 5.43%，当日折价率 为 2.79%。近一年以来上证 50、沪深 300、中证 500、中证 1000 股指期货主 力合约的年化贴水率中位数分别为 1.44%, 3.16%, 8.75%，12.09%，当日上 证 50 股指期货主力合约年化贴水率为 8.34%，处于近一年来 16%分位点，当 日沪深 300 股指期货 ...

Market Overview - The A-share market saw most major indices decline today, with the Shanghai Composite Index down 0.22% closing at 3380.19 points, the Shenzhen Component down 0.72% at 10219.62 points, the Sci-Tech 50 down 0.48% at 990.71 points, and the ChiNext Index down 0.96% at 2045.57 points [1] - Overall, there were 4451 stocks that declined, while only 882 stocks rose, and 77 stocks remained flat [1] - The total trading volume in the Shanghai and Shenzhen markets was 11027 billion, a decrease of 707.55 billion compared to the previous trading day [1] Industry Performance - Among the Shenwan first-level industries, all sectors except for banking, media, and household appliances experienced declines today [1] - The sectors that led the decline included beauty care, social services, basic chemicals, environmental protection, real estate, and electric equipment [1] Sector Highlights - The top-performing concept sectors today included selected banking, smart speakers, multimodal models, central enterprise banks, ChatGPT, online gaming, K-12 education, selected air transport, Kimi, selected insurance, IGBT, Chinese corpus, short drama games, internet celebrity economy, and central enterprise automobiles [1]