Core Viewpoint - The extreme volatility of the stock price of Yaojie Ankang is attributed to its recent inclusion in the Hong Kong Stock Connect and the announcement of a significant clinical trial progress for its core product, Tinengotinib, leading to substantial market reactions [4][5][6]. Group 1: Stock Performance - On September 12, Yaojie Ankang's stock surged by 77.09%, followed by a 115.58% increase on September 15, before plummeting by 53.73% on September 16 [1]. - The maximum drawdown from the peak price of 679.5 HKD reached 78% [3]. Group 2: Market Reactions and ETF Impact - The stock's extreme fluctuations negatively impacted the net asset values of related ETFs [3]. - Following the volatility, ETF managers took decisive actions to significantly reduce Yaojie Ankang's weight in their portfolios, which was initially 2.6% [7][8]. Group 3: Regulatory and Structural Issues - The incident highlighted issues in index compilation rules, particularly the insufficient prudence in including new stocks and inadequate assessment of liquidity risks [5]. - There was a lack of timely and transparent information disclosure regarding adjustments to index constituents [6]. Group 4: Company Overview - Yaojie Ankang reported zero revenue in its mid-2025 financials, with high R&D expenditures and reliance on financing, typical characteristics of a biotech company [9]. - The company's primary product, Tinengotinib, targets multiple resistant solid tumors, with the fastest progress in cholangiocarcinoma, which has a limited market size of 2 billion USD globally in 2024 [11]. Group 5: Future Considerations - The current valuation of Yaojie Ankang appears to have discounted all optimistic assumptions, with potential risks from clinical failures, financing challenges, or increased competition [11]. - The event is expected to prompt a reevaluation of index compilation rules, including conditions for new stock inclusion, liquidity considerations, and transparency in information disclosure [11].
复盘药捷安康-B事件始末...