Core Viewpoint - The recent implementation of quantitative trading regulations aims to enhance the precision of high-frequency trading supervision and impose strict constraints on abnormal trading, reshaping the market ecology and promoting the standardized development of the quantitative industry [2] Group 1: Quantitative Long Strategy Performance - The article highlights the performance of quantitative long products in the first half of the year, focusing on those with assets under management exceeding 500 million [2] - The top-performing quantitative long products are categorized by strategies such as quantitative stock selection, CSI 500 index enhancement, CSI 1000 index enhancement, and CSI 300 index enhancement [2] Group 2: Quantitative Stock Selection - The quantitative stock selection strategy relies on mathematical models and statistical analysis to avoid subjective emotional interference, allowing for the processing of data from thousands of stocks [3] - As of June 30, 2025, the average excess return of 144 quantitative stock selection products was ***%, with the top three products being "Zeyuan Shen Sheng No. 7 A Class" from Shenzhen Zeyuan, "Jiuming Qianliang No. 1" from Jiuming Investment, and "Liangying Risheng Exclusive No. 1 A Class" from Liangying Investment [3][5] Group 3: CSI 500 Index Enhancement - The CSI 500 index enhancement products aim to seek additional returns beyond the index through quantitative methods [6] - As of June 30, 2025, the average excess return of 139 CSI 500 index enhancement products was ***%, with the top three being "Xinhong CSI 500 Index Enhancement No. 2 A Class" from Xinhong Tianhe, "Xiangmu Yongfu" from Xiangmu Asset, and "Abama Ruixue Fengnian Quantitative Selection" from Abama Investment [6][8] Group 4: CSI 1000 Index Enhancement - The CSI 1000 index enhancement products focus on actively managing investments to exceed the index benchmark [9] - As of June 30, 2025, the average excess return of 86 CSI 1000 index enhancement products was ***9%, with the top three being "Xiangmu Wangjiang No. 2" from Xiangmu Asset, "Anzi Geek CSI 1000 Enhancement No. 1 A Class" from Anzi Fund, and "Zizhu No. 2" from Tiange Investment [9][10] Group 5: CSI 300 Index Enhancement - The CSI 300 index enhancement products aim to achieve excess returns through quantitative stock selection and derivative tools [12] - As of June 30, 2025, the average excess return of 24 CSI 300 index enhancement products was ***%, with the top three being "Jiu Zhang Huan Fang CSI 300 Quantitative Multi-Strategy No. 1" from Ningbo Huan Fang, "Mingcong Stable Growth No. 2" from Mingcong Investment, and "Tote CSI 300 Index Enhancement No. 2" from Tote (Sanya) Private [12][16] Group 6: Other Index Enhancements - Other index enhancement products cater to high-net-worth individuals, including various indices such as the National Securities 2000, Sci-Tech Innovation Board Index, and others [17] - As of June 30, 2025, the average excess return of 52 other index enhancement products was ***%, with the top three being "Liangchuang Quantitative Beizheng Stock Selection No. 1 A Class" from Liangchuang Investment, "Shengguanda Stock Quantitative No. 2 C Class" from Shengguanda, and "Longqi Technology Innovation Selection No. 1 C Class" from Longqi Technology [17][20]

Core Viewpoint - The A-share market experienced significant volatility in the first half of 2025, leading investors to prioritize the balance of returns and risks when selecting stock strategy products. The Sharpe ratio emerged as a crucial metric for evaluating risk-return profiles of these products [2]. Summary by Relevant Sections Overall Performance - In the first half of 2025, there were 2,891 stock strategy products with a displayed Sharpe ratio, achieving an average return of 12.4% and an average Sharpe ratio of 1.57. The products managed by private equity firms with a scale of 10-20 billion showed the highest average return at 16.39% [2][3]. Performance by Company Size - **100 Billion and Above**: - 420 products with a total scale of 632.37 billion, average return of 11.40%, and a Sharpe ratio of 2.03 [3]. - **50-100 Billion**: - 196 products with a total scale of 244.84 billion, average return of 12.12%, and a Sharpe ratio of 1.97 [3]. - **20-50 Billion**: - 258 products with a total scale of 267.26 billion, average return of 11.78%, and a Sharpe ratio of 1.85 [3]. - **10-20 Billion**: - 309 products with a total scale of 267.01 billion, average return of 16.39%, and a Sharpe ratio of 1.57 [3]. - **5-10 Billion**: - 422 products with a total scale of 250.14 billion, average return of 11.60%, and a Sharpe ratio of 1.50 [3]. - **0-5 Billion**: - 1,286 products with a total scale of 434.97 billion, average return of 12.19%, and a Sharpe ratio of 1.32 [3]. Top Products by Performance - The article highlights the top-performing stock strategy products across different company sizes, focusing on those with returns above the average and high Sharpe ratios. Notable products include: - **100 Billion and Above**: Quantitative long products dominated the top 10, with notable managers from Stable Investment and Wide De Private Equity [4][6]. - **50-100 Billion**: The top products were primarily subjective long and quantitative long strategies, with significant contributions from Qianyan Private Equity [8][10]. - **20-50 Billion**: Quantitative long products were most prevalent, with top managers from Jiuming Investment and Zhao Rong Hui Li Private Equity [13][15]. - **10-20 Billion**: A mix of subjective long products, with top managers from Xiangmu Asset and Haokun Shengfa Asset [18][21]. - **5-10 Billion**: Quantitative long products led the rankings, with top managers from Yangshi Asset and Zeyuan Investment [22][25]. - **0-5 Billion**: Quantitative long products were also prominent, with two products from Guangzhou Tianzhanhan making the top five [26][27].