近期，一家上半年无收入、无利润的生物科技公司在港股市场掀起了血雨腥风。从暴涨到暴跌，药捷安康仅用三天时间，就走完了某龙头创新药企曾经长达 两年的股价起伏。 在这场资本博弈中，有人赚得盆满钵满，也有人血本无归。刀口舔血的游戏里，赢家终究是少数。被动卷入的基民同样难以幸免，部分ETF资金高位接盘， 深陷套牢困境。 药捷安康引发的这场资本狂欢，为原本就已炽热的港股18A（采用港交所第18A章规则上市的未有收入、未有利润的生物科技公司）板块再添一把火。今年 以来，18A仿佛成了"造富神话"的代名词，站在选择的十字路口，许多投资者不禁会问：18A还值得投吗？到底是估值泡沫，还是价值洼地？ 针对这些问题，北京商报记者通过多视角采访市场参与者，尝试寻找最真实的答案。 1分钟赚近2万元 32岁的王星星已有近六年投资经验。她成为了药捷安康这场"惊魂一日"中赚到钱的幸运者。 王星星从9月12日开始关注药捷安康。前一日，该股收涨20.78%，走势尚属平稳，并未显露"妖股"态势。然而9月12日尾盘，药捷安康突然大幅拉升，盘中涨 幅一度超过130%，最终收涨77.09%，报收192.5港元/股，总市值逼近千亿港元。自此，药捷安康"一战 ...

Group 1 - The adjustment of the Sci-Tech Innovation 50 Index will occur after the market closes on September 12, with the stock Cambrian being a focal point due to its weight exceeding the 10% cap [1][2] - Cambrian's weight increased from 10% to approximately 15% due to a significant rise in its stock price during the third quarter, necessitating a rebalancing of the index [2] - The selling of Cambrian shares does not equate to a market crash, as the funds from selling will be redistributed into other constituent stocks, mitigating the impact on Cambrian's stock price [3] Group 2 - The rebalancing of the index is aimed at maintaining a healthier and more sustainable representation of the market, ensuring that it reflects the best assets available [4] - The 10% weight cap is designed to reduce risk and volatility, preventing any single stock from disproportionately influencing the index [4] - The operation of index funds is structured to allow ordinary investors to participate in the market while minimizing the risks associated with individual stock volatility [4]

Core Insights - The recent adjustment of the Sci-Tech Innovation 50 Index by the China Securities Index Company has significant implications for the stock of Cambrian Biologics, which has exceeded the weight limit set by the index rules [1][2] - Cambrian's stock price has experienced a decline of 20% over five consecutive trading days due to the pressure from index fund rebalancing [1] Group 1: Index Adjustment and Weight Limit - The Sci-Tech Innovation 50 Index has a rule that limits the weight of a single sample to a maximum of 10%, and Cambrian's weight reached 14.88%, exceeding the limit by 5 percentage points [1] - The top five samples' combined weight must not exceed 40%, but the current combined weight stands at 45.70% [1] Group 2: Fund Rebalancing Impact - Funds tracking the Sci-Tech Innovation 50 Index, with a total scale of approximately 180 billion yuan, may need to sell nearly 10 billion yuan worth of Cambrian stock to comply with the weight limit [2] - The presence of multiple ETFs among Cambrian's top shareholders exacerbates the impact of the rebalancing on its stock price [2]

Core Viewpoint - The market is experiencing fluctuations, with value styles showing relative strength during these times, indicating potential investment opportunities in value-oriented stocks and funds [3][4][10]. Market Overview - The overall market slightly declined, with the CSI All Share Index down by 0.13% [1]. - Large-cap stocks saw slight gains, while small-cap stocks experienced more significant declines [2]. - The pharmaceutical sector showed overall gains, contrasting with the slight decline in consumer stocks that had previously risen [5][6]. Investment Strategies - In the current market environment, it is advised to maintain a steady position and avoid frequent trading to prevent losses [8][11]. - The recent market behavior resembles the trends observed between 2013 and 2017, suggesting that undervalued stocks across various categories will eventually have their performance phases [9][10]. Value Style Performance - Value styles, including dividend and free cash flow stocks, have seen an increase, although the overall rise has been modest this year [4][18][19]. - The A-share CSI Dividend Index showed a slight decline from the beginning of the year until August 21, while the Hong Kong dividend stocks have seen some gains, albeit limited [20][21]. Fund Performance and Strategies - The "Monthly Salary Treasure" strategy is currently undervalued, with 40% of its portfolio in value-oriented stocks [17]. - The bond portion of the "Monthly Salary Treasure" strategy is focused on medium to short-term bonds, which are currently more favorable compared to long-term bonds that have seen significant declines this year [28][30]. - The strategy includes an automatic rebalancing feature to optimize returns by adjusting the stock and bond allocations based on market movements [28][30]. Valuation Insights - A valuation table for dividend indices has been created for reference, highlighting various metrics such as earnings yield, price-to-earnings ratio, and return on equity [22][41]. - The current valuation of value styles has not improved significantly since the beginning of the year, indicating potential for future appreciation as market conditions evolve [27]. Upcoming Events - A live session is scheduled to discuss historical bull and bear market characteristics and current market stages, providing insights for investors [4].

Core Viewpoint - Index rebalancing is a process that ensures the vitality of indices by removing stocks that do not meet criteria and adding new ones, which can lead to changes in stock valuations and investor strategies [3][5][6]. Group 1: Index Rebalancing Process - Index rebalancing is akin to a metabolic process, ensuring that indices remain representative and investable [4]. - There are two main types of index rebalancing: temporary adjustments due to special events and regular adjustments based on sample stability [7][9]. - Regular rebalancing occurs at different frequencies, such as quarterly, semi-annually, or annually, depending on the index [14][15]. Group 2: Impact on Valuations - The recent rebalancing on June 13 affected various indices, with changes in the number of stocks and their average price-to-earnings (P/E) and price-to-book (P/B) ratios [20][18]. - For instance, the Shanghai-Shenzhen 300 Index saw a decrease in P/E and a slight increase in P/B after adjusting 7 stocks [23]. - The CSI 500 Index experienced an increase in both P/E and P/B after replacing 50 stocks [24]. Group 3: Strategy Indices - Strategy indices, such as the CSI A500 and value strategies, often see different valuation impacts compared to market-cap weighted indices [30][32]. - The CSI A500 Index's recent rebalancing led to a decrease in P/E and a slight increase in P/B [31]. - The 300 Value Index typically sees a decrease in valuation metrics due to its focus on low P/E and P/B stocks [32]. Group 4: Market Behavior and Investor Strategies - Market-cap weighted indices can lead to a "buy high, sell low" scenario, as stocks that rise in value are included while those that fall are excluded [43]. - This phenomenon has historical precedence in markets like the U.S. during the tech bubble, where high-flying stocks were included in indices, leading to greater declines when the bubble burst [45]. - To mitigate these effects, investors may consider strategy indices that do not rely on market capitalization, thus avoiding the pitfalls of chasing high valuations [47][51].

Core Viewpoint - The article discusses the upcoming index rebalancing in June, highlighting its impact on various indices and the valuation changes of stocks involved in the rebalancing process [7][8][49]. Group 1: Market Overview - The overall market experienced an increase, with indices reaching between 4.9 and 5 stars [1][2]. - All market caps, including large, mid, and small-cap stocks, saw an upward trend [3][4]. - The Hong Kong stock market also rose, led by the technology index [6]. Group 2: Index Rebalancing - June marks the index rebalancing period, occurring on the second Friday of the month [7][8]. - Regular rebalancing is necessary due to stock performance fluctuations, which may lead to some stocks no longer meeting index criteria [9][10]. - The rebalancing process does not affect the net asset value of index funds significantly, as they sell stocks being removed and buy those being added [12][13][15]. Group 3: Valuation Changes - The rebalancing will notably impact the valuations of various indices, particularly favoring small and mid-cap stocks due to their recent strong performance [18][20]. - For the CSI 300 index, 7 stocks were adjusted, resulting in a decrease in average P/E ratio from 25.8 to 18.4, while the P/B ratio slightly increased [22][23]. - The CSI 500 index saw 50 stocks replaced, leading to a slight increase in both P/E and P/B ratios [24][25]. - The CSI 1000 index, representing small-cap stocks, had 100 stocks adjusted, with a significant increase in both P/E and P/B ratios [26]. - The CSI 2000 index, representing micro-cap stocks, had 681 stocks adjusted, also showing an increase in both valuation metrics [27]. Group 4: Strategy Indices - Strategy indices, such as value and low volatility indices, tend to lower their valuations during rebalancing due to their selection criteria [38][41]. - The A500 index adjusted 21 stocks, resulting in a slight decrease in average P/E ratio [35][36]. - The value index adjusted 9 stocks, leading to a decrease in both P/E and P/B ratios [39][40]. - The Hong Kong-Shenzhen dividend low volatility index adjusted 43 stocks, also resulting in a decrease in average P/E ratio [44][45]. Group 5: Investor Guidance - Investors do not need to take any specific actions during the index rebalancing, as fund managers handle the adjustments automatically [50]. - The article encourages investors to maintain their positions and be patient during market fluctuations [54].

Core Viewpoint - The article discusses the upcoming index rebalancing scheduled for June, highlighting its impact on various indices and the valuation changes of stocks involved in the rebalancing process [7][8][39]. Group 1: Market Overview - The overall market experienced an increase, with indices reaching between 4.9 and 5 stars [1][2]. - Large, mid, and small-cap stocks all saw gains, with the CSI 300 index showing slightly higher growth compared to small-cap stocks [3][4][5]. - The Hong Kong stock market also rose, led by the technology index [6]. Group 2: Index Rebalancing - June marks the index rebalancing period, which occurs in June and December, specifically after the second Friday of the month [7][8]. - Regular rebalancing is necessary due to stock performance fluctuations, which may lead to some stocks no longer meeting the index criteria [9]. - Rebalancing does not affect the net value of index funds significantly, as they sell stocks being removed and buy those being added without major changes in fund value [10][11]. Group 3: Valuation Changes - The rebalancing will have a notable impact on the valuations of many indices, particularly favoring small and mid-cap stocks due to their strong performance over the past six months [13][15][16]. - For the CSI 300 index, seven stocks were adjusted, resulting in a decrease in average price-to-earnings (P/E) ratio from 25.8 to 18.4, while the price-to-book (P/B) ratio slightly increased [18][19]. - The CSI 500 index saw a change of 50 stocks, with both P/E and P/B ratios experiencing slight increases post-rebalancing [20]. - The CSI 1000 and CSI 2000 indices, representing small and micro-cap stocks, respectively, also underwent significant changes, reflecting the upward valuation trend of smaller stocks [21]. Group 4: Strategy Indices - Strategy indices, such as value and low volatility indices, typically see a decrease in valuation after rebalancing due to their selection criteria favoring lower P/E and P/B stocks [32][36]. - The A500 index adjusted 21 stocks, with a slight decrease in average P/E from 27.3 to 25.26 [29][30]. - The value index adjusted nine stocks, resulting in a decrease in average P/E from 16.87 to 12.57 [33][34]. Group 5: Investor Guidance - Investors do not need to take any specific actions regarding the index rebalancing, as fund managers will handle the adjustments automatically [12][41].

Core Viewpoint - The banking sector experienced significant gains on the first trading day of June, with notable increases in the stock prices of Hu Nong Commercial Bank and Yu Nong Commercial Bank, attributed to their inclusion in the CSI 300 Index [1] Group 1: Stock Performance - Hu Nong Commercial Bank's stock reached the daily limit increase, while Yu Nong Commercial Bank's stock rose over 6%, making them the top performers in the A-share banking sector [1] - Other banks such as Industrial Bank and Qingdao Bank also saw stock price increases exceeding 4% to 5% on June 3 [1] Group 2: Index Inclusion - The surge in stock prices for Hu Nong Commercial Bank and Yu Nong Commercial Bank is likely linked to their recent inclusion in the CSI 300 Index, as announced by China Securities Index Co., Ltd. on May 30 [1] Group 3: Market Trends - Since 2025, the banking sector has been on an upward trend, driven by several factors including demand for long-term capital from public funds and insurance companies [1] - The banking sector's high dividend yield and low valuation have attracted risk-averse capital, contributing to the positive market sentiment [1] - Macro policies aimed at reducing systemic risks in the banking sector are facilitating a revaluation of bank stocks [1]