国泰海通证券研究·2025-09-21 13:55Market Overview - During the past week (September 15-19), A-share market indices showed mixed performance, with the Shanghai Composite Index declining by 1.30% and the CSI 300 Index down by 0.44%. In contrast, the Shenzhen Component Index and the ChiNext Index increased by 1.14% and 2.34%, respectively, while the STAR 50 Index rose by 1.84% [1] - Market trading activity improved compared to the previous week, with an average daily trading volume of approximately 2.52 trillion yuan. On Thursday, the single-day trading volume peaked at 3.17 trillion yuan but dropped significantly to 2.35 trillion yuan on Friday [1] - Small-cap indices slightly outperformed large-cap indices, with a preference for growth styles. The market exhibited a structural trend influenced by the Federal Reserve's interest rate cuts and technological catalysts, with funds shifting from traditional finance to technology growth and low-cycle sectors [1] Sector Performance - The consumer services, automotive, electronics, coal, and home appliance sectors saw the highest gains, while the semiconductor, lithography machine, and humanoid robot sectors continued to attract capital. Conversely, non-ferrous metals, banking, and non-bank sectors experienced the largest declines [1] Convertible Bond Market - The convertible bond market showed an overall adjustment trend, with the CSI Convertible Bond Index declining by 1.55%. The equal-weighted convertible bond index fell by 1.29%, with a greater decline than the equal-weighted index of convertible bond underlying stocks [1] - The median price of convertible bonds decreased from 132.30 yuan to 129.51 yuan, and the median conversion premium rate contracted to 23.77%. The weighted average conversion premium rates for equity, balanced, and bond-oriented convertible bonds also saw compression [1] Future Outlook - For the remainder of September, the convertible bond market is expected to continue its oscillating pattern, with potential risk aversion as the National Day holiday approaches, leading to a possible decline in market trading sentiment [2] - Following the holiday, a return of funds and increased policy expectations regarding the "14th Five-Year Plan" from the upcoming Fourth Plenary Session in October may boost risk appetite. The convertible bond market is anticipated to receive support and repair opportunities, with a focus on solid underlying stocks with compressed conversion premiums in technology growth and cyclical sectors [2]