中国上证综指7月2日（周三）开盘上涨0.42点，涨幅：0.01%，报3458.17点；中国深证成指7月2日（周三）开盘下跌20.47点，跌幅：0.2%，报10455.83点；中国沪深300指数7月2日（周三）开盘上涨0.56点，涨幅：0.01%，报3943.32点；中国创业板指数7月2日（周三）开盘下跌7.78点，跌幅：0.36%，报2140.14点；中国科创50指数7月2日（周三）开盘下跌2.42点，跌幅：0.24%，报992.38点。

Market Performance Summary - The Shanghai Composite Index opened on July 2 with a slight increase of 0.42 points, representing a change of 0.01%, closing at 3458.17 points [1] - The Shenzhen Component Index opened on July 2 with a decrease of 20.47 points, reflecting a decline of 0.2%, closing at 10455.83 points [1] - The CSI 300 Index opened on July 2 with a minor increase of 0.56 points, indicating a change of 0.01%, closing at 3943.32 points [1] - The ChiNext Index opened on July 2 with a decrease of 7.78 points, showing a decline of 0.36%, closing at 2140.14 points [1] - The STAR 50 Index opened on July 2 with a decrease of 2.42 points, reflecting a decline of 0.24%, closing at 992.38 points [1]