Market Overview - On July 28, the Shanghai Composite Index rose by 0.12%, with the total margin trading balance reaching 1,967.03 billion yuan, an increase of 19.604 billion yuan from the previous trading day [1] - The margin trading balance in the Shanghai market was 999.628 billion yuan, up by 11.991 billion yuan; in the Shenzhen market, it was 961.117 billion yuan, up by 7.532 billion yuan; and in the Beijing Stock Exchange, it was 6.288 billion yuan, up by 0.081 billion yuan [1] Industry Analysis - Among the industries tracked by Shenwan, 29 sectors saw an increase in margin trading balances, with the electronics sector leading with an increase of 2.642 billion yuan, followed by the computer and communication sectors with increases of 1.745 billion yuan and 1.404 billion yuan, respectively [1] Stock Performance - A total of 2,241 stocks experienced an increase in margin trading balances, accounting for 60.39% of the total, with 426 stocks seeing an increase of over 5% [1] - The stock with the largest increase in margin trading balance was Saiwei Microelectronics, which had a latest balance of 165.0343 million yuan, reflecting a 56.23% increase from the previous trading day, and its stock price rose by 2.58% [1] - Other notable stocks with significant increases in margin trading balances included Pengding Holdings and Litong Technology, with increases of 51.05% and 36.48%, respectively [1] Top Gainers and Losers - Among the top 20 stocks with the largest increases in margin trading balances, the average stock price rose by 1.88%, with notable gainers including Xinqi Microelectronics, Mingyang Technology, and Xinlei Co., which saw increases of 20.00%, 12.00%, and 10.16%, respectively [2] - Conversely, the stocks with the largest declines in margin trading balances included Qingju Technology, which saw a decrease of 42.07%, followed by Jiahua Technology and Ping An Electric with declines of 41.49% and 29.42%, respectively [5]