China's crackdown on offshore trading sends HSBC, StanChart down 4%-6%

China's securities regulator tightened scrutiny on offshore brokerages last month, triggering a 4% to 6% selloff in London-listed banks with large Hong Kong exposure as investors priced in restrictions on mainland capital flows.

"The selloff reflects a market misinterpretation of reasonable regulatory measures to restrict outbound investment through grey channels," Jefferies analysts wrote in a note. "These measures instead fortify the position of international financial institutions conducting business through the Connect mechanisms."

HSBC Holdings Plc fell 3.9% on June 4, Standard Chartered Plc slid 5.6%, and insurer Prudential Plc dropped 6.5% to an eight-month low of £9.87. AIA Group Ltd. declined 3.5% and UBS Group AG also came under pressure. The moves followed a May 22 announcement by the China Securities Regulatory Commission and seven other agencies of a sweeping rectification plan targeting illegal cross-border securities, futures, and fund businesses.

The crackdown accelerates a longer-term shift steering Chinese capital and companies toward Hong Kong, which Beijing views as a more controllable offshore financial hub. The two-year phaseout of unauthorized platforms could redirect billions of dollars in retail investor flows from U.S. ADRs into Hong Kong-listed stocks eligible for the Stock Connect program.

The CSRC's plan targets Tiger Brokers, Futu Holdings, and Longbridge Securities — online brokerages that allowed mainland residents to trade U.S. and Hong Kong stocks outside formal channels. Existing mainland clients will be limited to selling assets and withdrawing funds, while local websites, trading apps, and servers are to be shut down. Tiger Brokers will bar existing mainland-based users from opening new positions starting June 12.

Deposit Accounts Unaffected, Jefferies Says

Jefferies' channel checks indicated that mainland investors opening deposit and savings accounts face no additional restrictions, while those opening investment accounts face stricter scrutiny. This distinction benefits international banks with dominant positions in Hong Kong's deposit market, including HSBC and Standard Chartered, whose offshore clients are primarily deposit-based, the broker said.

The broker forecast limited impact on Bank of China Hong Kong Holdings Ltd., as its cross-border business is more corporate-related, while Bank of East Asia Ltd.'s China business is centered on wealth management.

Mainland Investors Rush to Hong Kong

The regulatory tightening has triggered a wave of mainland investors traveling to Hong Kong to open bank and brokerage accounts in person. Crowds gathered outside branches of Chief Securities and uSMART Securities at Hong Kong's West Kowloon high-speed rail station on June 3, many holding only mainland identity cards. At a nearby HSBC branch, dozens queued to open savings accounts, with some planning to use them later for trading accounts.

Hong Kong's Securities and Futures Commission and the Hong Kong Monetary Authority updated rules for mainland clients opening investment accounts around the same time as the CSRC's announcement, narrowing the gray area around offshore trading. Licensed brokerages must now conduct additional checks to verify that clients' investment funds come from legitimate sources outside the mainland.

The shift could benefit a pipeline of high-profile Chinese IPOs expected in coming months, including memory chipmaker CXMT, robotics firm Unitree, and semiconductor company YMTC, according to Peter Alexander, founder of Shanghai-based consulting firm Z-Ben Advisors. "China is making real strides in building a roster of companies that are custom-built to address the technological gaps currently present with America," he said.

Still, analysts cautioned that the incremental boost to Hong Kong may be limited. Among companies with dual U.S. and Hong Kong listings, the majority of trading already occurs through Hong Kong, said Vey-Sern Ling, senior equity advisor at Union Bancaire Privée.

Mainland residents remain subject to strict capital controls, including an annual foreign-exchange quota of $50,000 per person intended for personal consumption — not for capital-account transactions such as offshore securities. China has exchanged tax information with Hong Kong under the Common Reporting Standard since 2018, giving mainland tax authorities visibility into financial accounts held by mainland residents in Hong Kong.

This article is for informational purposes only and does not constitute investment advice.