Offshore Currencies: A Different Way to Manage Capital Flows

How China’s Offshore Yuan Shapes Global Capital Flows

When investors think about currency policy, they usually picture interest rate decisions, foreign exchange interventions, or restrictions on moving money abroad. Yet governments can also influence international finance through a less visible mechanism: controlling how much of their currency is available outside their borders.

China’s offshore yuan provides a useful example. Its significance extends beyond the exchange rate displayed on a trading screen. The availability of offshore money can affect funding costs, investment incentives, and the channels connecting international investors with domestic assets.

A new study by Saleem Bahaj and Ricardo Reis, published in the Journal of Macroeconomics, examines the fiscal implications of this arrangement.¹ Its central finding is that offshore currency management can influence capital flows while generating relatively little government revenue. For investors, that distinction helps explain why a policy with a small budgetary footprint can still matter for markets.

What Is the Offshore Yuan?

The renminbi, commonly called the yuan, trades in different market environments. CNY generally refers to the onshore market in mainland China, while CNH identifies the offshore market. These are markets for the same national currency, rather than separate currencies issued by competing governments.

The distinction matters because access, liquidity, and regulatory conditions differ. In the paper’s framework, capital controls prevent domestic households and foreign investors from investing directly across borders. Offshore bank deposits provide an intermediary channel, while authorities control offshore reserves and influence banks’ ability to create deposits.

This creates a system with two layers of money. Central bank reserves form the foundation, while commercial banks expand the deposit supply. Policymakers can therefore influence offshore financial conditions through reserve availability and liquidity rules, without treating every cross-border transaction as a separately taxable event.

How Offshore Liquidity Influences Capital Flows

Consider an investor who wants to acquire assets denominated in a currency that is difficult to obtain offshore. The expected return on those assets is only part of the calculation. Securing the necessary funding may be expensive, and that expense can reduce the attraction of the investment.

In the researchers’ model, scarce offshore money creates gaps between the returns available through offshore deposits and those investors could earn through unrestricted access to domestic or foreign investments. These gaps act like an implicit tax on cross-border investment incentives.

The comparison with a financial transaction tax is useful, but incomplete. A transaction tax charges an explicit amount on qualifying activity. Offshore liquidity management changes financial conditions through the scarcity of money and the costs of supplying it.

The authors identify practical attractions: currency exchanges automatically net opposing flows, offshore money supply can be adjusted frequently, and central banks have tools that influence bank-created liquidity. The contribution of this paper is to examine the associated fiscal consequences, rather than demonstrate that the approach is always the best policy.

Why the Fiscal Footprint Is Surprisingly Small

The study separates government revenues into seigniorage and liquidity revenues. Seigniorage concerns the financial benefit associated with issuing money. Liquidity revenues arise through the operation of lending facilities. Banks can also capture benefits from providing offshore deposits, meaning those benefits do not all become public revenue.

A key approximation links total fiscal revenue to the size of offshore deposits relative to GDP and the tax-like wedge associated with offshore scarcity. A small offshore deposit market limits the revenue base, even when the mechanism influences investment decisions.

These figures require careful interpretation. The broader revenue range comes from illustrative calculations using cross-border deposit data and assumed wedges. The Chinese figure is an estimate based on offshore yuan conditions, rather than an audited budget entry. Neither establishes that all countries would experience the same outcome.

The researchers also find relatively flat revenue curves under their modeled conditions. Adjusting the money supply produces limited additional fiscal gains. That suggests a weaker incentive to turn offshore currency management into a revenue-raising tool, although it does not eliminate other motives for restricting capital flows.

What Currency Investors Should Watch Beyond Exchange Rates

The practical insight is that a currency’s price and the cost of financing positions in that currency are different variables. An investor can correctly anticipate an exchange-rate movement and still misjudge the economics of a trade if funding becomes expensive.

For a business, similar considerations apply to paying suppliers, holding working capital, or financing overseas operations. Access to dependable liquidity can matter as much as the ability to execute a currency conversion.

A useful monitoring framework includes:

• Offshore funding costs and deposit availability.
• Differences between onshore and offshore exchange rates.
• Rules governing collateral, market access, and liquidity facilities.

The study does not provide a trading signal. Its value is a way to connect monetary plumbing with investment incentives. It also highlights a potential tension: broader international currency use can expand the offshore market and its revenue potential, while policymakers may still want to retain control over cross-border financial conditions.

Why Digital Payments Still Depend on Liquidity

This distinction is relevant to financial innovation. Faster payment networks can reduce processing delays, but speed alone does not ensure that participants can obtain the right currency, use acceptable collateral, or move funds across regulatory boundaries.

Securities.io’s discussion of stablecoins and faster securities settlement explores how new settlement arrangements could change market operations. Its coverage of Mastercard’s stablecoin payments strategy illustrates established institutions’ interest in alternative payment infrastructure.

Meanwhile, Stripe’s 2026 guide to stablecoin cross-border payments explains their use in international transfers. These developments concern payment technology; the offshore currency paper concerns monetary arrangements. The connection is an analytical lesson, not a finding about blockchain: improving a transfer mechanism does not automatically remove the financial constraints surrounding it.

For investors assessing fintech claims, the question becomes more specific. Does an innovation merely move balances faster, or does it also improve access to funding, conversion, and usable collateral?

HSBC Connects Investors With Offshore Yuan Markets

HSBC Holdings offers a listed-company connection to these changes through its role in cross-border banking and offshore renminbi markets. Its relevance is particularly clear in financing arrangements that make existing assets more useful.

In February 2025, HSBC completed offshore renminbi repo transactions using onshore Chinese bonds acquired through Northbound Bond Connect as collateral. A repo is a financing arrangement involving the sale of securities with an agreement to repurchase them. HSBC acted as a liquidity provider and custodian for participating clients.

This illustrates practical infrastructure innovation: investors can use eligible bond holdings to obtain offshore financing, rather than treating those holdings solely as investments awaiting eventual sale.

In July 2026, HSBC also outlined rising renminbi adoption, discussing overseas lending and yuan-denominated bond issuance. That is the bank’s market perspective, rather than independent confirmation of the paper’s conclusions.

For investors interested in exposure to this infrastructure, HSBC is a diversified banking business. Greater market activity could support financing, custody, and transaction services, but the study does not forecast HSBC earnings. Credit quality, interest rates, regulation, and conditions across its wider operations remain relevant.

Latest HSBC Holdings (HSBA) News and Developments

The Investment Lesson From Offshore Currency Management

The study’s broader contribution is to show why monetary influence should not be judged solely by government revenue. A mechanism can generate little public income while shaping how investors access markets and finance positions.

The opportunity lies in making those connections more efficient and reliable. Better collateral arrangements, clearer access rules, and dependable liquidity can make international investment more practical. For both currency investors and shareholders in cross-border financial institutions, understanding that infrastructure offers a more useful perspective than focusing on exchange-rate forecasts alone.

References:

¹ Bahaj, S., & Reis, R. (2026). The fiscal implications of parallel currencies. Journal of Macroeconomics, 90, Article 103783. https://doi.org/10.1016/j.jmacro.2026.103783