AI Frenzy Drives Up A-Share Trading Volume as China's Stock Stamp Tax Revenue Surges Over 80% YoY in First Eight Months
nashnova research
China's stock stamp-tax revenue hit RMB 216 billion in Jan–Aug, up 82% year-on-year — driven not by rising prices but by an AI-fueled trading surge that pushed daily turnover up over 70%, even as the broad market barely moved.
Stamp tax up 82 % — where did the money come from?
Ministry of Finance data: Jan–Aug stock stamp-tax revenue reached RMB 216 bn, up 82% YoY.
Stamp tax — a small levy on every stock transaction by value — is a direct mirror of trading volume: more trades, more tax.
This means → the jump is not about higher share prices; it is about a sharp rise in the number and size of trades.
The broad market is flat — so why did turnover surge?
A-share daily turnover rose 72% YoY to RMB 2.67 trillion.
Yet the CSI 300 index is roughly flat for the year; the broad benchmark contributed almost no gains.
In plain terms = money did not lift the whole market — it churned rapidly in and out, concentrating on a handful of sectors.
Where did the money go?
The chip-heavy STAR 50 index gained 23% over the first eight months, far outpacing the broad market.
AI-related expectations kept pulling capital into tech stocks, with flows visibly tilting toward the technology sector.
This reflects a structural rotation: the overall water level barely changed, but the flow through the AI pipe surged.
What to watch next?
Whether the STAR 50 rally can last hinges on whether AI supply-chain fundamentals keep delivering on market expectations.
This means → if earnings or orders fail to keep pace with share prices, capital can exit just as fast as it entered — high turnover cuts both ways.
Put simply = heavy trading ≠ making money. The stamp-tax boom signals heat, but it also flags the volatility risk that comes with rapid churn.
市场有风险，内容仅供研究参考，不构成投资建议。