7月6日一早，港股市场光通信以及PCB概念股遭遇集体下跌。到了10点40分左右，长飞光纤光缆的股价跌幅已超过14%；建滔积层板的跌幅也超过了11%，芯碁微装H股和胜宏科技H股的跌幅分别超过了11%和8%，建滔集团的跌幅也超过了6%。
上证报中国证券网 furnishes the following report from journalist Kong Lingyi: On the morning of July 6th, the Hong Kong stock market witnessed a collective downturn in light communication and PCB concept stocks. By 10:40 AM, the share price of CFH Optical Fiber had dropped by more than 14%; Jiantao Multilayer Board's decline exceeded 11%, as did that of Xinqi Micro-Installation H shares and Shenghong Technology H shares (both falls were over 11% and 8%, respectively), while Jiantao Group's price reduction surpassed 6%.
Among them, CFH Optical Fiber saw its lowest price touch 162 Hong Kong dollars per share, at one point falling close to 20%.