Group 1 - Small-cap stocks exhibit higher volatility and activity compared to large-cap stocks, making them more likely to become market leaders [1] - As of September 15, there are 977 stocks with a circulating market value below 3 billion yuan, and 402 stocks with a circulating market value below 2 billion yuan [1] - A total of 1,659 stocks have a total market value below 5 billion yuan, with 570 stocks having a total market value below 3 billion yuan [1] Group 2 - The three stocks with the smallest circulating market values are: Zitian Tui at 101 million yuan, *ST Yuancheng at 560 million yuan, and Bofei Electric at 609 million yuan [1] - The three stocks with the smallest total market values are: Zitian Tui at 102 million yuan, *ST Yuancheng at 560 million yuan, and *ST Suwu at 675 million yuan [1] - A detailed list of stocks with circulating market values below 2 billion yuan includes various sectors such as media, construction decoration, and basic chemicals, with notable stocks like Bofei Electric having a P/E ratio of 155.38 [1][2]