On August 12, 2026, the three major A-share indices experienced a collective, albeit slight, downturn at the market open. The Shanghai Composite Index dipped by 0.01%, the Shenzhen Component Index saw a 0.04% decline, and the ChiNext Index fell by 0.2%.

In terms of sectoral performance, coal, pharmaceuticals, and building materials emerged as the laggards. Notably, Linyu Pharmaceutical plummeted by over 8%, Dayou Energy tumbled more than 4%, and International Composite Materials retreated by over 2%.

Conversely, the internet, semiconductor, and computer hardware sectors shone brightly, leading the gains. N Jeeri stood out with a staggering surge of over 181%, while UCloud and Xiechuang Data also posted robust gains, rising more than 5% each.