Core Viewpoint - The listing date for the Sci-Tech 50 stock index futures is currently undetermined, with the market awaiting official announcements regarding its launch [2]. Group 1: Listing Information - The Sci-Tech 50 ETF was launched on November 16, 2020, on the Shanghai Stock Exchange, including four funds: Huaxia Sci-Tech 50 ETF, E Fund Sci-Tech Board 50 ETF, Huatai-PB Sci-Tech Board ETF, and ICBC Credit Suisse Sci-Tech ETF [2]. Group 2: Differences Between Sci-Tech 50 and SSE 50 Index Futures - The underlying index of the Sci-Tech 50 index futures consists of 50 large-cap, liquid technology innovation companies from the Sci-Tech Board, focusing on emerging industries like semiconductors and biomedicine, highlighting growth attributes [4]. - The SSE 50 index futures are based on the SSE 50 index, which includes 50 large-cap, liquid blue-chip stocks primarily from traditional sectors such as finance and real estate, characterized by concentrated weight and stability [4]. Group 3: Risk and Return Characteristics - The constituent stocks of the Sci-Tech 50 index are mostly growth-stage companies with high earnings volatility, resulting in an annualized volatility of over 30%, leading to higher risk and return potential under leverage [5]. - In contrast, the SSE 50 index stocks are mature, with an annualized volatility of about 20%, making the associated index futures relatively more controllable and suitable for conservative strategies [5]. Group 4: Market Function Focus - The Sci-Tech 50 index futures primarily serve risk management for the Sci-Tech Board, helping investors hedge against technology stock volatility and attracting long-term capital for investment in innovative enterprises [5]. - The SSE 50 index futures focus on providing hedging tools for large-cap blue-chip stocks, commonly used to mitigate systemic market risks and maintain overall market stability [5]. Group 5: Contract Design Differences - There are differences in contract details such as margin ratios and price fluctuation limits between the two index futures. The Sci-Tech 50 index futures may require higher margins (e.g., 12%-15%) due to its higher volatility, while the SSE 50 index futures typically have margins around 10%-12% [6].

【导读】周二股票ETF资金净流出30亿元 4月29日（本周二），A股市场维持节前窄幅震荡态势，三大指数涨跌互现，沪指微跌0.05%。全市场成交额小幅缩量至1.02万亿元。 股票ETF当日资金净流出30亿元。中证1000、科创板相关等宽基ETF资金净流入靠前，沪深300、中证A500等宽基ETF净流出较多。 4月以来，在国家队等大资金助力下，股票ETF呈现明显资金净流入，合计"吸金"接近2400亿元。 股票ETF资金净流出30亿元 数据统计，截至2025年4月29日，全市场股票ETF达到1073只（含跨境ETF，下同），总规模为3.47万亿元。 资金流向显示，4月29日，市场震荡之际，股票ETF净流出资金30亿元，为连续第二个交易日资金净流出，合计接近百亿元。 当日资金净流入超过1亿元的股票ETF有11只，宽基ETF吸金居前。易方达科创板50ETF、易方达创业板ETF、国泰钢铁ETF位居前三，资金净流入均超1.8 亿元。 来自易方达基金的数据显示，4月29日，以下方向资金净流入居前，分别为中证1000（净流入3.8亿元）、科创板综（净流入3.6亿元）、科创板50（净流入 1.9亿元）、钢铁（净流入1.8亿元）、 ...