China Tightens Mutual Fund Rules to Curb Style Drift

China’s financial regulators have unveiled a sweeping package of new rules for the country’s 37.53 trillion yuan ($5.2 trillion) public mutual fund industry, targeting long-standing malpractices including style drift, excessive herding, and conflicts of interest in fund management. The Asset Management Association of China (AMAC) released four regulatory documents simultaneously on the evening of June 12, 2026, marking one of the most comprehensive regulatory overhauls for the sector in recent years, as reported by Xinhua News.

Context: A Sector at a Crossroads

The regulatory push comes at what China Securities Regulatory Commission (CSRC) Chairman Wu Qing has described as a critical “mid-game” moment for mutual fund reform. Speaking at the AMAC 4th Member Representative Conference in early June, Wu warned that while industry reputation has recovered somewhat, regulators must not relent. He called for resolute action to “curb malpractices such as betting on sectors, style drift, and high-position issuance,” cautioning against a return to the old path of “chasing scale and making quick money.”

The new rules arrive as China’s mutual fund industry continues its rapid expansion. As of the first quarter of 2026, total assets under management reached 37.53 trillion yuan, though money market funds (15.58 trillion yuan) and bond funds (9.04 trillion yuan) together accounted for 65.6% of that total, highlighting the need for a more balanced and investor-friendly ecosystem.

Key Provisions: Four Regulations, One Unified Push

Cracking Down on Style Drift

The centerpiece of the package is the Theme Investment Style Management Guidelines, which take effect on December 1, 2026, with a 12-month transition period for existing funds. The guidelines tackle “style drift” — a persistent problem where theme funds marketed as investing in specific sectors such as technology or healthcare instead invest in unrelated areas, a practice sometimes dubbed “fund blind boxes.”

Under the new rules, fund managers must establish and maintain an “investment style library” with clearly defined criteria. At least 80% of non-cash assets must be invested in securities within that style library. Fund custodians are now required to audit the style library and monitor compliance. Managers must set deviation thresholds and disclose them periodically, and severe deviations from stated investment directions will be included in negative assessment indicators.

According to Securities Times, the guidelines also require fund managers to establish internal management mechanisms for funds that are severely偏离 their investment direction, have excessively concentrated holdings, or concentrate investments in a single sub-sector.

Investor Suitability Overhaul

The Detailed Rules on Investor Suitability require fund managers and distributors to strictly match fund risk characteristics with investor risk tolerance and investment objectives. Notably, special protections are mandated for investors aged 65 and above when purchasing high-risk funds, including more prudent sales procedures, enhanced risk warnings, extended consideration periods, and increased follow-up frequency.

Sustainable Investing Standards

New Guidelines on the Application of Sustainable Investment Strategies require funds employing sustainable investment approaches to set appropriate performance benchmarks reflecting those strategies. Fund managers are encouraged to regularly disclose their sustainability evaluation criteria and strategy application status.

Public-Private Separation

A revised Working Guidelines on Fund Managers Concurrently Serving as Investment Managers of Private Asset Management Plans addresses conflicts of interest between public and private fund management. Public fund managers are prohibited from concurrently managing private asset management plans unless those plans are mandated by long-term institutional capital such as commercial banks or insurance companies. The rules also ban concurrent managers from investing in the private plans they manage and extend that prohibition to their immediate family members.

Analysis: From Soft Constraints to Hard Rules

Tian Lihui, Dean of the Financial Development Research Institute at Nankai University, described the regulatory approach as a shift from “soft constraints” to “hard constraints.” In comments to Xinhua News, Tian explained that the series of institutional designs creates a closed-loop mechanism of “monitoring-warning-correction” to precisely address style drift. “Requiring managers to set deviation thresholds and disclose them periodically transforms fund investment from ‘hidden drift’ to ‘visible control,’” he said. “For ordinary investors, the information asymmetry in ‘fund selection’ is also reduced.”

Tian predicted three major changes once the regulations are fully implemented: clearer product positioning that eliminates the “fund blind box” phenomenon, more standardized investment behavior with long-term value investing becoming mainstream, and stronger investor protection through transparent constraints that reduce information asymmetry.

What’s Next

The Theme Investment Style Management Guidelines will take effect on December 1, 2026, with existing funds granted up to 17 months to fully comply. Most existing theme funds are expected to require minimal changes as they already have relevant contractual provisions. However, the transition period will test the industry’s ability to adapt, particularly for smaller fund managers who may face higher compliance costs.

The regulatory push also signals that China is moving decisively to professionalize its asset management industry, aligning it more closely with international standards. As the CSRC’s Wu Qing emphasized, the reform is at a “mid-game” stage — significant progress has been made, but the most critical work lies ahead.