DeFi in Hong Kong: Legal and Regulatory Considerations

Decentralised finance (DeFi) represents one of the most disruptive and legally complex developments in the financial services industry. By using blockchain-based smart contracts to replicate traditional financial services — lending, borrowing, trading, yield generation — without centralised intermediaries, DeFi challenges the foundational assumptions of financial regulation.

This article examines how Hong Kong’s regulatory framework applies to DeFi, the key legal risks for participants, and how the regulatory approach is evolving.

What Is DeFi?

DeFi refers to financial applications built on blockchain networks (most commonly Ethereum and its layer-2 chains) that operate through self-executing smart contracts rather than centralised institutions. Key DeFi primitives include:

• Decentralised exchanges (DEXs): Protocols such as Uniswap and Curve that allow peer-to-peer token swaps without an order book or central counterparty.
• Lending and borrowing protocols: Platforms such as Aave and Compound that allow users to lend crypto assets for yield or borrow against collateral.
• Yield aggregators: Protocols that automatically allocate assets across lending platforms to optimise returns.
• Stablecoins: Algorithmic or over-collateralised stablecoins (DAI, LUSD) that maintain a peg to a reference currency through smart contract mechanisms.
• Derivatives and synthetic assets: Protocols replicating derivatives or providing exposure to real-world assets.

Is DeFi Regulated in Hong Kong?

DeFi does not fit neatly into Hong Kong’s existing regulatory framework, which was designed for centralised intermediaries. Whether a DeFi protocol or activity is regulated depends on: the nature of the assets involved (securities, virtual assets, or neither), the functions performed by the protocol, and whether there is a sufficiently identifiable person or entity carrying on a regulated activity.

Virtual Asset Service Providers (VASPs)

The Anti-Money Laundering and Counter-Terrorist Financing (Amendment) Ordinance 2022 introduced a mandatory licensing regime for virtual asset service providers (VASPs) conducting business in Hong Kong. The regime applies to centralised exchanges and OTC desks, but its application to DeFi protocols is less clear.

The SFC has indicated that the VASP regime may capture “pseudo-decentralised” platforms — those that claim to be decentralised but retain significant central control (e.g., through upgradeable contracts controlled by a founding team, admin keys, or governance mechanisms dominated by a small group). Truly permissionless, immutable protocols with no controlling person are harder to bring within the regime, but the SFC has signalled a willingness to pursue those who build, deploy, or promote DeFi applications targeting Hong Kong users.

Securities and Futures Ordinance (SFO)

If a DeFi protocol involves “securities” as defined under the SFO (including shares, debentures, or interests in a collective investment scheme (CIS)), the SFO’s licensing requirements apply to any person carrying on a regulated activity (dealing, advising, managing) in relation to those securities. This is particularly relevant for:

• DeFi protocols that issue governance tokens that may qualify as securities
• Yield-generating pools that may constitute CIS interests
• Synthetic asset protocols replicating securities

Stablecoins

The HKMA is developing a stablecoin licensing regime (see the HKMA’s consultation conclusions published in 2024). Fiat-referenced stablecoins issued in or distributed to Hong Kong users will require HKMA authorisation. This directly affects DeFi protocols that use stablecoins as a core component.

Legal Risks for DeFi Participants

Founders and Developers

Persons who build, deploy, and maintain DeFi protocols face the greatest regulatory exposure. If the protocol performs a regulated function, the developers may be treated as carrying on a regulated activity without a licence — a criminal offence under both the SFO and the AMLO. The SFC has taken action against operators of platforms structured as “decentralised” but found to be substantially controlled by identifiable persons.

Governance Token Holders

Governance token holders who vote on protocol parameters may, in some circumstances, be treated as having control over the protocol. If governance decisions involve activities that would otherwise require SFC or HKMA licensing, there is a theoretical (if largely untested) risk that active governance participants could be drawn into regulatory liability.

Liquidity Providers

Liquidity providers who supply assets to DEX pools or lending protocols are generally participating as users rather than operators. However, if a liquidity provider is also promoting or facilitating access to the protocol for other users, they may take on additional regulatory exposure.

Users

End users of DeFi protocols in Hong Kong face limited direct regulatory risk from using DeFi services, but should be aware that: unregulated DeFi platforms offer no investor protection, compensation fund coverage, or recourse to the SFC or HKMA if things go wrong; smart contract bugs, exploits, and rug pulls are common; and there may be tax implications for DeFi activities (see profits tax and capital gains considerations).

AML/CFT Considerations

DeFi’s pseudonymous nature creates significant AML/CFT challenges. Protocols that lack KYC/AML controls are increasingly targeted by regulators globally. The Financial Action Task Force (FATF) has indicated that DeFi developers and governance participants who maintain control or sufficient influence over a protocol may qualify as virtual asset service providers and therefore be subject to AML/CFT obligations.

In Hong Kong, any VASP (including potentially DeFi operators) must comply with the AMLO’s customer due diligence, record-keeping, and suspicious transaction reporting requirements.

The Travel Rule

The “travel rule” requires VASPs to collect and transmit originator and beneficiary information for virtual asset transfers above a threshold (HK$8,000). Its application to DeFi — where there may be no identifiable VASP on one or both sides of a transaction — is a major unresolved compliance challenge. The SFC and HKMA have acknowledged this issue but have not yet provided definitive guidance.

Regulatory Evolution

Hong Kong’s approach to DeFi regulation is still developing. The SFC and HKMA have signalled:

• A focus on the “look-through” principle: regulatory characterisation is based on the economic substance and function of the protocol, not its technical architecture.
• An intent to apply existing regulatory frameworks to DeFi to the extent possible, rather than creating DeFi-specific rules.
• A recognition that truly decentralised protocols present novel regulatory challenges that may require new legislative approaches.

Businesses building in the DeFi space in Hong Kong should monitor SFC and HKMA guidance closely and seek legal advice before deploying protocols or launching products targeting Hong Kong users.

Conclusion

DeFi presents profound regulatory questions that no jurisdiction has fully resolved. In Hong Kong, the regulatory trajectory is towards greater scrutiny of DeFi operators, particularly those maintaining meaningful control over protocols. The SFC’s willingness to apply existing frameworks to DeFi — and to take enforcement action where warranted — means that “decentralisation” is not a legal shield.

Alan Wong LLP advises on virtual asset regulation, DeFi compliance, and SFC licensing in Hong Kong. Contact us if you are building in the DeFi space or need regulatory guidance.