这三只名字里都有“人工智能”的ETF，应该怎么选？

Core Viewpoint - The article discusses the performance and characteristics of three different AI-focused ETFs: the AI ETF, the ChiNext AI ETF, and the Sci-Tech Innovation AI ETF, highlighting their varying performances and sector exposures throughout the year [1][4]. Group 1: ETF Performance Comparison - The ChiNext AI ETF has shown the best performance this year, with a gain of over 30% [1]. - In the first half of the year, the Sci-Tech Innovation AI ETF outperformed the others, while the ChiNext AI ETF began to surpass the others after June [1][7]. Group 2: Sector Exposure - The Sci-Tech Innovation AI ETF has the highest allocation to semiconductors at 51%, while the ChiNext AI ETF focuses more on IT services and communication equipment, which together account for 56% [4]. - The sector distribution of the CSI AI ETF is more balanced, with semiconductors at 29% and other sectors like software development and IT services ranging from 9% to 18% [4]. Group 3: Concept Exposure - The Sci-Tech Innovation AI ETF has a stronger exposure to chip and consumer electronics concepts, while the ChiNext AI ETF is more focused on computing power, optical modules, and communication [4]. - The CSI AI ETF maintains a more balanced exposure across various concepts [4]. Group 4: Component Stock Analysis - The ChiNext AI ETF and the CSI AI ETF each have 50 constituent stocks, while the Sci-Tech Innovation AI ETF has 30 [6]. - The CSI AI ETF has 13 overlapping stocks with the Sci-Tech Innovation AI ETF and 12 with the ChiNext AI ETF, and it does not include any small-cap stocks with a market cap below 10 billion [6][7]. - The concentration of the top ten stocks is highest in the Sci-Tech Innovation AI ETF at 67%, while the ChiNext AI ETF has a concentration of over 30% among its top three stocks [6][7].