China's three major A-share indices turned positive; 6G-related and optical-fiber sectors led gains

On June 4, 2026, China's three major A-share indices—the SSE 50, SSE 180, and SSE 380—closed in positive territory, reflecting renewed investor confidence in the domestic equity market. The gains were driven by strong performance in the 6G-related and optical-fiber sectors, which saw significant momentum amid ongoing technological advancements and infrastructure development.

The 6G-related stocks benefited from recent developments in China’s 6G research and trials. According to the Ministry of Industry and Information Technology, the second phase of 6G technical trials has commenced, following the completion of the first phase, which yielded over 300 key 6G technologies. Additionally, Chinese officials have outlined a roadmap aiming for 6G commercialization by 2030, with standard-setting expected around 2025. These developments have spurred optimism among investors, particularly in firms involved in next-generation communication infrastructure.

The optical-fiber sector also contributed to the market’s upward movement. The global optical networking and communication market, which includes China as a major player, is projected to grow at a compound annual growth rate (CAGR) of 8.5% through 2032, reaching USD 54.8 billion by that year. China’s extensive fiber infrastructure and government-backed broadband initiatives, such as the Broadband China strategy, continue to drive demand for optical components and systems. The country’s domestic optical manufacturing base, with an annual production capacity exceeding 250 million fiber kilometers, supports both local deployment and export-led growth.

The SSE 50 and SSE 180 indices, which focus on traditional industries such as finance and energy, also posted gains, albeit more modestly, indicating a broad-based recovery in investor sentiment. Meanwhile, the SSE 380, which emphasizes emerging sectors like information technology and green energy, outperformed, reflecting the market’s focus on innovation-driven growth.

Overall, the positive performance of China’s A-share indices underscores the market’s responsiveness to technological progress and infrastructure investment, with 6G and optical networking sectors playing a pivotal role in shaping near-term trends.