On July 17, 2026, the three major indices of A-shares opened on a weak note, collectively moving lower. The Shanghai Composite Index dipped by 0.44%, settling at 3,865.32 points, while the Shenzhen Component Index witnessed a steeper decline of 0.97%, closing at 14,348.22 points. The ChiNext Index also followed suit, dropping 1.36% to end at 3,642.06 points.

The semiconductor and CPO (Co-Packaged Optics) sectors emerged as the primary drivers of the downturn, with Demingli experiencing a dramatic plunge to its limit down. Other notable decliners in these sectors included Yuanjie Technology, Eoptolink Technology, and Dongshan Precision, all of which saw their share prices tumble by more than 4%.

In contrast, the liquor and oil and gas sectors stood out as bright spots amid the overall market gloom. Weilong Grape Industry surged nearly 7%, while Tongyi Group posted a gain of over 1%, providing some relief to investors in these segments.