"Green" used to be a marketing adjective — now there's an official answer. On 3 May 2024 the HKMA published Phase 1 of the Hong Kong Taxonomy for Sustainable Finance, defining "green" technical criteria for 12 economic activities across 4 sectors; a Phase 2A expansion followed in January 2026. Its real power isn't mandatory status — it's interoperability with the CGT, the Mainland catalogues and the EU Taxonomy: one ruler that reads across markets.
What problem the taxonomy solves
World without a taxonomy: an issuer calls a project "green," investors can only take it on trust — greenwashing has no objective reference. With a taxonomy: every economic activity carries technical screening criteria (e.g., carbon-intensity thresholds for power generation) — "green" becomes a verifiable technical question. This is precisely why it becomes the reference object for greenwashing: once an official ruler exists, "I thought it was green" stops being a defence.
Mandatory or voluntary?
The taxonomy itself is not mandatory — the HKMA "encourages" the industry to use it for product labelling, product development, identification, disclosure, risk management and investment guidance. But the pattern of regulatory history is that voluntary standards, once widely adopted, become de facto baselines; disclosure rules then cite them and enforcement uses them as the yardstick. The Enforcement Files series shows the same arc — "guidance" becoming "standard" is usually only a matter of time.
Practical applications
- Product labelling — before labelling a loan/bond/fund "green," benchmark it against the taxonomy criteria
- Internal risk management — use the taxonomy as the framework for portfolio "greenness" assessment
- Due diligence — when a client claims a project is green, ask whether it meets the taxonomy criteria
- Disclosure — cite the taxonomy in climate/ESG reports to raise credibility
- Cross-border deals — exploit interoperability to structure transactions satisfying both Mainland and international investors
Official sources
| Document | Issuer | Date |
|---|---|---|
| Hong Kong Taxonomy launch — press release | HKMA | 2024.5.3 |
| Phase 2A circular | HKMA | 2026.1.22 |