China Securities Stamp Tax Surges 88.8% on Market Boom

China’s securities transaction stamp tax revenue soared 88.8% year-on-year to 126.2 billion yuan (approximately $17.5 billion) in the first five months of 2026, according to data released by the Ministry of Finance on June 22. The dramatic increase underscores a sustained surge in capital market activity driven by policy support, shifting household asset allocation, and heightened trading frequency.

Context: What Is the Securities Transaction Stamp Tax?

China’s securities transaction stamp tax is a levy on stock transactions, currently set at 0.1% on the sell side since the rate was halved in August 2023 to stimulate the capital market. First introduced in 1990, the tax has been adjusted nine times and serves as both a policy tool and a significant source of central government revenue, directly tied to stock market trading volumes.

Key Developments

According to the People’s Daily, total stamp tax revenue reached 242.6 billion yuan in January-May, up 35.8% year-on-year, with the securities transaction component accounting for more than half of that figure. The broader fiscal picture showed general public budget revenue growing 4% to 10,046.5 billion yuan, while tax revenue rose 4.4% to 8,261.7 billion yuan.

A detailed analysis by Cailianshe revealed that May 2026 alone generated 32.7 billion yuan in securities transaction stamp tax, a staggering 145.86% increase from 13.3 billion yuan in May 2025 — the highest monthly figure of the year. Average daily trading volume on A-share markets reached 3.20 trillion yuan in May, up 277.91% year-on-year and 35.84% month-on-month.

Margin trading balances also climbed sharply, averaging 2.88 trillion yuan daily in May, a 59.19% increase from the previous year. New account openings surged to 2.7653 million in May alone, up 77.76% year-on-year, with cumulative new accounts reaching 17.2968 million in the first five months.

Analysis: Drivers Behind the Surge

Tian Lihui, Dean of the Financial Development Research Institute at Nankai University, provided expert analysis on the driving factors. “The core driving force behind this stamp tax surge is not the widely perceived influx of new investors, but rather a significant increase in the trading frequency of existing funds and a concentrated burst of overall market activity,” Tian explained. He noted that stamp tax has a very strong positive correlation with market turnover, and the sharp rise directly confirms that current A-share market liquidity is abundant with capital turnover rates at high levels.

The data supports this interpretation: while new account openings grew 57.94% year-on-year, stamp tax revenue grew at a much faster 88.8%, indicating that existing investors trading more frequently — rather than a flood of newcomers — is the primary driver.

Multiple channels of institutional capital have also flowed into the market. According to Guoxin Securities research, leveraged funds contributed nearly 400 billion yuan in inflows, active equity funds and fixed-income-plus products added nearly 150 billion yuan, and participating insurance products contributed nearly 200 billion yuan in the first five months of 2026.

Risks and Implications

Despite the positive revenue picture, experts have flagged concerns about sustainability. Tian Lihui warned of “superficial heat” in market volumes, noting that the current high turnover and trading heat are more driven by capital sentiment and risk appetite than by corporate fundamental recovery. “If market trading heat remains high but lacks core fundamental support such as corporate profit recovery and real economic improvement, the current high growth trend may face marginal diminishing pressure, and short-term market volatility risk has increased,” he cautioned.

The stamp tax surge provides a significant boost to central government revenue, partially offsetting weakness elsewhere. Government fund budget revenue fell 19.2% in the period, driven by a 28.7% decline in land transfer revenue — reflecting the ongoing real estate sector weakness. Personal income tax grew 12.2% year-on-year, suggesting improving household income conditions, while corporate income tax turned positive at 0.2% after a period of negative growth.

What’s Next

The sustainability of the stamp tax surge will depend on whether the current market rally can transition from sentiment-driven trading to fundamentals-backed growth. Analysts will be watching closely to see if corporate earnings improve to match elevated market valuations, and whether policymakers introduce measures to channel market activity toward long-term investment rather than short-term speculation. The second half of 2026 will be critical in determining whether the current high growth trajectory can be maintained.