China Intensifies Scrutiny of Foreign ETF Trading Amid Market Volatility Concerns

China Examines Foreign ETF Trading Activities

Chinese regulators are currently intensifying their examination of how foreign firms engage with the nation's substantial $859 billion exchange-traded fund (ETF) market. The inquiry specifically targets trading patterns and activities carried out by brokers, according to individuals familiar with the matter. This heightened scrutiny comes in the wake of regulatory action against Jane Street Group in India.

As of June 30, 2025, Jane Street was identified as the largest foreign ETF market maker in China through the Qualified Foreign Investor (QFI) program. Other prominent foreign firms participating in China's ETF market include Optiver, Susquehanna International Group, and Hudson River Trading. Despite its leading position, Jane Street accounts for less than 2% of overall ETF trading in mainland China.

Background: Jane Street's Regulatory Issues in India

The impetus for China's current review is directly linked to a crackdown on Jane Street by Indian regulators. Last year, the Securities and Exchange Board of India (SEBI) temporarily banned the U.S.-based investment firm from its domestic securities market and ordered the disgorgement of over $563 million (₹4,843 crore) in profits.

SEBI accused Jane Street of misleading retail investors through alleged index manipulation. The regulator claimed the firm engaged in aggressive buying and selling of key Bank Nifty and Nifty 50 constituent stocks to influence options pricing and generate substantial profits. Jane Street has consistently denied these allegations.

The temporary trading ban in India was lifted after Jane Street complied with an order to deposit ₹4,843.50 crore (approximately $567 million) into an escrow account, a move made 'without prejudice' to its legal rights. The firm has filed an appeal against SEBI's allegations, with a hearing scheduled for January 19, 2026.

China's Broader Market Context and Regulatory Approach

The increased oversight of foreign market makers underscores China's sensitivity to the performance of its stock market. The market is predominantly influenced by retail investors and is known for its susceptibility to volatility. Beijing has historically employed a combination of regulations, behind-the-scenes pressure, and interventions by state-owned investment funds to mitigate market swings.

While scrutinizing foreign trading patterns, China has also been taking steps to further open its capital markets. The China Securities Regulatory Commission (CSRC) announced that qualified foreign institutional investors (QFIIs) would be permitted to trade onshore ETF options for hedging purposes starting from October 9, 2025. This initiative aims to expand the investable scope for QFIIs and provide them with essential risk management tools.

Implications for Foreign Investors

The ongoing scrutiny has already led to some precautionary measures. UBS Group AG, for instance, temporarily paused some trades from Jane Street via the QFI program late last year. However, Jane Street has stated that it is 'conducting business as usual with its counterparties globally, including UBS, across asset classes.' Regulators have clarified that no firm is currently accused of wrongdoing in China, and there is no indication that trading relationships among Jane Street's peers have been broadly impacted by Beijing's queries.