On October 29, the three principal A-share indices witnessed a collective downturn. The Growth Enterprise Index experienced a significant drop of over 4%, while the Shenzhen Component Index slid by 2.7%, the Shanghai Composite Index decreased by 0.86%, and the STAR 50 Index also fell notably by 4.18%. Leading the decline were sectors such as optical modules, PCBs (Printed Circuit Boards), memory chips, CPO (Co-Packaged Optics), and photolithography equipment. Across the Shanghai, Shenzhen, and Beijing markets, more than 4,700 individual stocks ended in the red.
