A-Share Tech Stocks Surge on Sept 7, 2026: ChiNext +3.41% While Shanghai Composite Stays Flat

On Monday, September 7, 2026, the Shanghai Composite Index closed nearly flat at +0.07% (3,932.70), but beneath the surface the market was anything but calm: the ChiNext Index surged +3.41% and the STAR 50 rose +2.42% in a sharp structural rally led by optical communications and semiconductors.

Key market data (2026-09-07)

| Ticker | Asset | Close | Change | Turnover | Intraday Range | | :--- | :--- | :--- | :--- | :--- | :--- | | 399006.SZ | ChiNext Index | 3,398.68 | +3.41% | 508.5B CNY | 2.71% | | 000688.SH | STAR 50 Index | 1,615.53 | +2.42% | 88.3B CNY | 3.03% | | 000001.SH | Shanghai Composite | 3,932.70 | +0.07% | 897.9B CNY | 0.81% | | 688498.SH | Yuanjie Technology (optical chips) | 1,702.00 | +16.10% | 9.0B CNY | 14.87% | | 300308.SZ | Zhongji Innolight (800G/1.6T CPO) | 898.46 | +10.38% | 37.6B CNY | 8.12% | | 601138.SH | Foxconn Industrial Internet (AI servers) | 66.57 | +4.52% | 11.5B CNY | 3.58% | | 002371.SZ | NAURA (etch/thin-film equipment) | 660.65 | +3.52% | 5.3B CNY | 2.48% | | 688981.SH | SMIC (foundry) | 124.12 | +2.46% | 3.8B CNY | 2.54% | | 688256.SH | Cambricon (AI chips) | 1,092.38 | +1.90% | 11.0B CNY | 5.13% | | 688041.SH | Hygon Information (CPU/DCU) | 242.71 | -0.39% | 5.6B CNY | 5.29% |

Five drivers behind the rally

1. Global compute resonance: The Philadelphia Semiconductor Index rebounded, and Korean peers surged — SK Hynix +7.53%, Samsung Electronics +4.99% — reflecting sustained global AI datacenter demand for HBM and high-speed optical interconnect.

2. YMTC IPO catalyst: Memory giant Yangtze Memory Technologies (YMTC) achieved a major breakthrough in its STAR Market IPO process, re-rating the domestic semiconductor equipment chain (NAURA etchers, SMIC process support, Yuanjie optical emitters) via the capex multiplier effect.

3. Policy support package: Ten ministries including MIIT established the second phase of the National SME Development Fund; MIIT issued the AI SME Support Program (2026–2028); and seven departments including the CAC released top-level design for HVDC power in green computing facilities.

4. Earnings confirmation: With H1 reports concluded, optical module leaders like Zhongji Innolight posted doubled net profits with 1.6T order books full, dispelling "AI bubble" fears and leaving undervalued entry points.

5. Capital rotation (seesaw effect): Roughly a trillion yuan flowed out of defensive dividend assets (banks, coal, oil) into growth. ChiNext turnover hit 508.5 billion yuan in a single day while the Shanghai index stalled near 900 billion in turnover.

Standout stocks

• Zhongji Innolight (300308.SZ): +10.38% to 898.46 CNY with 37.6 billion yuan turnover (~3% of total market volume), signaling strong consensus among public funds, insurers, and foreign capital. As the global leader in 800G/1.6T optical modules, it directly benefits from the AI capex arms race.
• Yuanjie Technology (688498.SH): +16.10% to 1,702 CNY with 14.87% intraday swing and 88.2% 20-day annualized volatility — the highest-beta play on CW laser chips and silicon photonics.

Conclusion

The session marks a decisive rotation of market leadership from dividend-defense toward hard-tech industrial upgrading. The author notes this is a structural repricing driven by global compute demand and domestic semiconductor self-sufficiency — not a broad liquidity-driven rally.

Disclaimer

This content is for research and educational purposes only. It does not constitute investment advice. Tech, semiconductor, and optical communication stocks carry very high volatility (individual names often exceeding 70–80% annualized), earnings-cycle risk, and trade-policy risk. Investors should independently assess risks.