8月3日韩国股市遭遇杠杆ETF去杠杆冲击，KOSPI指数收跌5.12%至6257点，波及A股科创板，科创50指数当日下跌5.08%至1552.89点[1]。市场情绪随后扭转，英伟达副总裁Shainer宣布芯片光学互连产品（CPO）已步入量产阶段，计划在下半年大量导入全球AI工厂[1]。受此消息激励，美股半导体指数出现V型反转。
8月4日A股创业板指数大幅上涨5.64%，报收3488.97点，光通信产业链概念股集体飙升[1]。光模块龙头企业中际旭创单日成交额达497.9亿元，股价涨幅13.24%[1]。此外，药明康德上调了全年收入指引，从原先的513-530亿元上调至585-605亿元[1]。在此轮行情中，7月股票ETF净流入金额创下单月历史纪录，达4778.36亿元[1]。另一方面，OpenAI大幅下调了GPT-5.6 Luna的价格，三周内从每百万Token 1美元降至0.2美元[1]。
Chinese stock markets experienced a sharp turnaround on August 4 after initial losses, driven by Nvidia's announcement regarding its Co-Packaged Optics (CPO) technology. The reversal followed significant declines in both regional and domestic markets the previous day, signaling renewed investor confidence in semiconductor and optical communication sectors.
On August 3, South Korea's KOSPI index fell 5.12% to close at 6,257 points, while China's ChiNext 50 index dropped 5.08% to 1,552.89 points [1]. However, the market sentiment shifted after Nvidia's Vice President Shainer announced that CPO has entered mass production phase, with significant deployment expected across global AI data centers in the second half of the year [1]. This development triggered a notable recovery in U.S. semiconductor indices, which reversed their downward trajectory.
The positive momentum carried into Chinese markets on August 4, with the ChiNext index surging 5.64% to close at 3,488.97 points [1]. Optical communication-related stocks became the focal point of investor attention, with Zhongjiao Xuechuang recording single-day trading volume of 49.79 billion yuan and rising 13.24% [1]. Additionally, Wuxi Apptec raised its full-year revenue guidance from 51.3–53 billion yuan to 58.5–60.5 billion yuan [1].
