Core Viewpoint - The recent ETF investment frenzy labeled as "arbitrage" is cooling down, with significant losses for investors who participated in the "Xinchang ETF" arbitrage movement as many funds have returned to pre-suspension levels of the underlying stocks [2][3][6]. Group 1: ETF Investment Dynamics - On May 25, Haiguang Information and Zhongke Shuguang announced a merger, leading to their suspension and prompting investors to flock to the Xinchang ETFs to capitalize on potential gains upon their return [3][4]. - The Xinchang ETFs track the Zhongzheng Information Technology Application Innovation Index and the Guozheng Information Technology Innovation Theme Index, with significant holdings in the suspended stocks [3][4]. - From May 26 to June 9, Xinchang ETFs saw a net inflow of 71.7 billion yuan, with several funds experiencing over 20-fold increases in their share sizes [4][5]. Group 2: Market Reactions and Performance - Following the resumption of trading on June 10, while Zhongke Shuguang hit a daily limit up and Haiguang Information opened high, the Xinchang ETFs faced collective sell-offs, dropping between 2.5% and 3.8% [5][6]. - By June 13, the total scale of the Xinchang ETFs had decreased to 44.6 billion yuan, a reduction of over 38 billion yuan in just four days, although it still represented a net increase of 33.5 billion yuan since May 25 [6][10]. Group 3: Risks and Limitations of ETF Arbitrage - The ETF arbitrage strategy faced multiple risks, including the dilution of original holders' interests due to the rapid increase in fund size and the inability to capture the full benefits of the underlying stocks' performance [6][10]. - Investors attempting to buy into the ETFs directly faced challenges as market prices quickly adjusted to the news, often leading to losses if they bought at inflated prices [7][9]. - The change in redemption rules by some fund managers, requiring cash instead of stocks for redemptions, further complicated the arbitrage strategy, limiting investors' ability to capitalize on the suspended stocks [10][12]. Group 4: Controversy Over Fund Management Practices - The surge in ETF size raised concerns about whether fund managers' redemption rules were detrimental to original holders, as the dilution of stock weightings reduced the potential benefits from the stocks' recovery [12][15]. - There is ongoing debate about whether fund companies should prioritize the interests of original holders, especially in light of the significant losses incurred by those who participated in the arbitrage [12][15]. - The adjustments made by fund managers, such as limiting subscriptions and changing cash replacement rules, have sparked discussions on how to better balance the interests of new and existing investors in future scenarios [12][15].