CPO Concept Shares Rally as Four Firms Hit Daily Limit

CPO (co-packaged optics) concept stocks rose in volatile trading on 17 August 2026. Zhongshi Technology, Gongjin Co, Tianyang New Materials and Woge Optoelectronics each surged to the daily limit-up during the session. Taichenguang, Shijia Photon, Alaide and Tianfu Communication followed the rally with gains of their own. The sector's broad upward momentum marked a continuation of strength among co-packaged optics names, with limit-up performers leading the advance and the rest of the group tracking higher.