Group 1 - The core viewpoint of the article highlights that while industry-themed funds can achieve high returns during favorable market conditions, their performance often lacks sustainability, leading to high volatility risks for investors [1][2]. - Fund managers often experience significant performance discrepancies between industry-themed funds and broader market funds, with the former sometimes yielding impressive returns due to limited selection criteria, while the latter may underperform [1][3]. - The evaluation of fund managers' performance in industry-themed funds is contentious, as their success may be more attributable to market conditions rather than individual stock-picking skills, making it difficult to assess their true investment capabilities [3][4]. Group 2 - Industry-themed funds have historically seen spikes in popularity during specific market trends, such as the internet and renewable energy sectors, but many have since struggled to maintain performance, with some still facing losses [2]. - The investment scope of a fund manager is indicative of their skill and market understanding, with industry-themed funds serving as a training ground before managers are entrusted with broader market funds [4].