【金工】小市值风格仍占优——金融工程市场跟踪周报20250519（祁嫣然/张威）

Core Viewpoint - The A-share market continued to show a fluctuating performance with reduced trading volume, indicating a cautious sentiment among investors. The market is experiencing a "profit-taking" state, with net outflows from ETFs [2]. Market Performance Summary - The major indices showed mixed results: the Shanghai Composite Index rose by 0.76%, the SSE 50 increased by 1.22%, the CSI 300 gained 1.12%, while the CSI 500 and CSI 1000 fell by 0.10% and 0.23% respectively. The ChiNext Index rose by 1.38%, and the Northbound 50 Index increased by 3.13% [2]. - As of May 16, 2025, the valuation percentiles for major indices were categorized as "moderate" for the Shanghai Composite, SSE 50, CSI 300, CSI 500, and CSI 1000, while the ChiNext Index was rated as "safe" [2]. Sector Valuation Analysis - According to the CITIC industry classification, sectors such as non-ferrous metals, electric power and utilities, home appliances, food and beverage, agriculture, non-bank financials, and transportation are rated as "safe" in terms of valuation [2]. Volatility Analysis - The cross-sectional volatility of the CSI 300, CSI 500, and CSI 1000 indices decreased compared to the previous week, indicating a deterioration in the short-term Alpha environment. However, the time series volatility for the CSI 300 increased, suggesting an improvement in the Alpha environment, while the CSI 500 and CSI 1000 saw a decline [3]. Fund Flow Tracking - The top five stocks attracting institutional attention were Anji Technology (241 institutions), Hengerd (237), Naipu Mining Machine (122), Haimu Star (113), and Diaowei (94) [4]. - During the period from May 12 to May 16, 2025, southbound funds experienced a net outflow of 8.685 billion HKD, with net inflows of 4.910 billion HKD in the Shanghai Stock Connect and net outflows of 13.595 billion HKD in the Shenzhen Stock Connect [4]. ETF Performance - The median return for stock ETFs was 0.74% with a net outflow of 25.370 billion CNY. The median return for Hong Kong stock ETFs was 1.27% with a net outflow of 6.696 billion CNY. Cross-border ETFs had a median return of 3.80% with a net outflow of 1.081 billion CNY, while commodity ETFs had a median return of -4.71% with a net outflow of 4.308 billion CNY [6].