China’s stock market is experiencing a robust rally, prompting heightened regulatory scrutiny as trading activity reaches unprecedented levels. Amid soaring daily turnover on the Shanghai, Shenzhen, and Beijing stock exchanges, officials are moving to limit leverage, despite investor sentiment suggesting the bull market is just getting started. From Monday to Wednesday last week, trading volume emphasized this trend, peaking at an astonishing 3.99 trillion yuan (approximately $556 billion), eclipsing the previous record of 3.48 trillion yuan set in October 2024.
This surge in trading activity has rekindled memories of past market excesses, particularly the tumultuous boom-and-bust cycle witnessed in 2015. “Recently, the trading volume in the mainland has been exploding to an all-time high. Margin financing has reached a high level as well,” noted Hao Hong, chief economist at Grow Investment Group. In response, regulators have enacted tighter margin financing rules, increasing collateral requirements on new trades. Effective Monday, the margin requirement for credit purchases was raised from 80% to 100%, compelling investors to pay the full share cost upfront, thereby eliminating borrowing for new trades under existing margin rules.
Morgan Stanley described this regulatory move as a response to “overheating” in the A-share market, which includes stocks traded on the mainland. The investment bank’s A-share Market Sentiment Activity Index recently soared to 91%, the first instance above 90% since September 2024, primarily fueled by this record trading volume. Analysts from Morgan Stanley emphasized that the regulatory tightening coincided with escalating sentiment levels, positioning the market for potential volatility.
Amid these changes, foreign investors are increasing their participation, with net inflows surpassing $50 billion in recent months, according to Skybound Capital. However, this foreign investment still constitutes a small fraction of the overall activity in the A-share market. Domestic investors continue to dominate, representing about 90% of daily turnover, as opposed to major international markets where institutional investors hold significant sway.
The elevated presence of retail investors has fundamentally influenced regulatory strategies regarding leverage. Leverage in China’s equity market is primarily facilitated through margin financing, where investors borrow from brokers to purchase shares, amplifying potential gains and losses. While this can accelerate market rallies, it also heightens the risk of abrupt downturns. Shaping a “slow bull” market, regulators aim to mitigate speculative excess through incremental adjustments in leverage, promoting a more stable growth trajectory.
“The regulators have attempted to tweak the leverage so that they could engineer a ‘slow bull,'” said Hong. Other market veterans believe the adjustments are strategically designed to counter speculation, rather than signal broader systemic risk. They argue the market is undergoing “structural overheating,” particularly in sectors like AI and technology, which attract significant speculative interest. This selective enthusiasm is evident in the divergent performance across China’s exchanges, with the ChiNext board surging nearly 50% over the last six months, starkly outpacing the more subdued gains of the Shanghai Composite Index.
As the landscape of China’s stock market evolves, investors and regulators alike are closely monitoring these developments, balancing ambition with the need for stability in a rapidly changing environment.
Original Source: https://www.cnbc.com/2026/01/20/chinas-stock-market-overheats-amid-record-high-turnover.html
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Publish Date: 2026-01-20 05:29:00
