风云突变，又见3万亿！“牛市双旗手”重挫，硬科技坚挺，电子ETF逆市新高！港股AI巨震，513770新高后跌逾2%

Market Overview - On September 18, A-shares experienced a high and then a pullback, with the Shanghai Composite Index briefly approaching 3900 points before a collective drop of over 1% in the afternoon, resulting in a daily fluctuation of nearly 4% for the ChiNext Index [1] - The market turnover exceeded 3 trillion yuan, reaching 3.17 trillion yuan, a 30% increase compared to the previous period [1] ETF Performance - The "bull market flag bearers," the 300 billion yuan leading brokerage ETF (512000) and the 100 billion yuan fintech ETF (159851), fell by 2.97% and 3.4% respectively, despite high-frequency premium trading and inflows of low-buy funds [1] - The electronic ETF (515260), which covers the semiconductor and Apple supply chain, surged by 2.77%, hitting a four-year high, with a recent five-day inflow of 248 million yuan [1][4] Sector Highlights - The electronic sector led the market, with significant gains driven by domestic semiconductor breakthroughs, including historical highs for companies like SMIC [4][6] - The fintech sector faced pressure, with the fintech ETF (159851) dropping over 3%, but still attracting substantial net subscriptions of 2.77 billion shares on the day [13][15] Investment Trends - The electronic sector attracted 218 billion yuan in main funds, maintaining its position as the top sector for capital inflows over various time frames [8] - The fintech sector is expected to benefit from improved liquidity and ongoing technological innovations, with analysts predicting strong growth in the financial IT segment due to increased investments and AI integration [16][17] Hong Kong Market Dynamics - The Hong Kong market mirrored A-shares, with the Hang Seng Index and Hang Seng Tech Index both closing lower, despite earlier gains [2][18] - The Hong Kong Internet ETF (513770) experienced volatility, reaching a new high before closing down 2.15%, with significant trading volume [18][21] Future Outlook - Analysts suggest that the Hong Kong market could see a new round of growth driven by liquidity and improving economic conditions, with a focus on AI-related stocks [20] - The electronic and fintech sectors are expected to continue attracting investment as they align with broader technological advancements and market trends [10][17]