国泰中证500ETF（561350）涨超1.4%，市场关注后续动能

Group 1 - The core viewpoint of the news is the positive market response to the recent policy changes and adjustments in the CSI 500 index, which are expected to enhance the performance of medium-sized enterprises in China [1] - On August 10, 2025, the Ministry of Finance and several other ministries announced a policy to increase the R&D expense deduction ratio for qualified "specialized, refined, and innovative" enterprises in the CSI 500 to 120%, aimed at strengthening support for technology-oriented SMEs [1] - The Producer Price Index (PPI) data released on August 12 showed a month-on-month increase of 1.2% in the prices of industries with significant weight in the CSI 500, such as non-ferrous metals and chemicals, indicating a marginal improvement in demand within the midstream manufacturing sector [1] Group 2 - On August 3, the China Securities Index Co., Ltd. announced a semi-annual adjustment to the CSI 500 index, adding 50 new listed companies primarily in emerging sectors like renewable energy and biomedicine, with the adjustment effective after the market close on August 16 [1] - The Guotai CSI 500 ETF (561350) tracks the CSI 500 index (000905), which selects 500 medium-sized listed companies from the Shanghai and Shenzhen markets, covering multiple industries and reflecting the overall performance of small and medium-sized enterprises in the A-share market [1]