# RWA Daily Update — 2026-07-31

## Lesson title
**Project Aurum shows why the issuer and backing asset matter more than the word “stablecoin.”**

## Sources checked

1. **BIS Innovation Hub — Project Aurum: a prototype for two-tier central bank digital currency (CBDC)**
   - URL: https://www.bis.org/publ/othp57.htm
   - Accessed: 2026-07-31
   - Retrieval note: official BIS HTML page retrieved successfully with Python urllib. The official PDF was also downloaded from https://www.bis.org/publ/othp57.pdf and parsed locally with `pypdf` after `pdftotext` was unavailable.
   - Relevant official-source facts:
     - BIS describes Project Aurum as a full-stack CBDC system with a wholesale interbank system and a retail e-wallet system.
     - BIS says the prototype brought to life two different token types: intermediated CBDC and stablecoins backed by CBDC in the interbank system.
     - The report states that the CBDC-token is a central bank liability, while the stablecoin is not; the stablecoin is a bank liability fully backed by wholesale CBDC holdings in the interbank system.
     - The report says Aurum’s stablecoin balances are reconciled against the issuing bank’s real-time gross settlement (RTGS) balances with the central bank.
     - The system design includes controls against over-issuance, double-issuance and double-redemption, plus validator infrastructure.
     - In the stablecoin flow, only issuing banks can issue the CBDC-backed stablecoin, and redemption to recover the wholesale CBDC backing is carried out by the issuing bank of that stablecoin.

## Extracted facts for the page

- “Stablecoin” is not a single legal or risk category.
- In Aurum, a CBDC-token and a CBDC-backed stablecoin may both appear as retail e-wallet currency, but the issuer/legal liability differs.
- Backing is an operational and legal design problem: who issues the token, who holds the backing asset, how the backing is reconciled, who validates transfers, and who can redeem.
- A central-bank-backed reserve asset does not automatically make the customer-facing token a direct central-bank claim.

## No-hype summary

Project Aurum is useful for RWA education because it separates the token label from the legal claim. BIS describes two retail token forms: an intermediated CBDC token that is a central bank liability, and a CBDC-backed stablecoin that is a bank liability backed by wholesale CBDC in the interbank system. That distinction is exactly the kind of detail that gets lost in market slogans. The word “stablecoin” does not answer who owes the holder money, what backs the instrument, who controls issuance, who validates transfers, or who can redeem.

For tokenized funds, bonds and other RWAs, the payment instrument matters as much as the asset token. A tokenized asset settled with a bank-liability coin, a central-bank-liability token, a money-market fund share, an e-money claim or an unsecured platform balance has different risk. Learners should ask for the liability map before accepting the convenience story.

## Page lesson draft

BIS Project Aurum is a good vocabulary warning: two tokens can sit in the same wallet interface and still represent different legal claims. The BIS/HKMA prototype included a wholesale interbank system and a retail e-wallet system. It tested an intermediated CBDC token and a CBDC-backed stablecoin. The report says the CBDC-token is a central bank liability, while the stablecoin is not; it is a bank liability, even though it is fully backed by wholesale CBDC holdings in the interbank system.

That matters for RWA settlement. If a tokenized bond, fund unit or invoice is paid for with “digital cash,” the next question is not whether the payment token looks stable on a dashboard. The question is who owes the money, what backs it, who can issue it, who validates it, and who can redeem it. Aurum also shows why anti-over-issuance, double-redemption and backing-reconciliation controls matter.

The no-hype lesson: a stronger backing asset can improve a design, but it does not erase issuer, liability, redemption and operational-risk questions. **Watch question:** is the settlement token a direct central-bank claim, a bank liability backed by central-bank money, a stablecoin reserve claim, or just a platform balance?

## Editorial cautions

Educational only. This is not investment, banking, legal, tax, custody, stablecoin, CBDC or securities advice. Project Aurum is a prototype/research project, not a live public product or endorsement of any private tokenized asset, stablecoin, exchange, wallet or RWA platform.