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BLOCKCHAIN LAB BRIEFING · STABLECOINS

TerraUSD Was a Design for Defending a Peg. It Was Not a Reserve of Dollars.

The TerraUSD break in May 2022 is still misread as a hack or as ordinary volatility. The design used a related volatile token and market incentives. When those incentives failed, there was no dollar reserve behind the quote.

2 October 2026

All briefings

01

What happened

TerraUSD was meant to trade at one dollar through mint-and-burn against LUNA. The volatile token was the defence, not a pool of cash and Treasury bills. In May 2022 the peg broke and the mechanism did not restore par.

The Canon keeps the design separate from the later network. The operating rule is simpler: do not call a reflex design a reserve.

02

Why it matters

Later tokens still promise a dollar backed by a trading strategy or by another token the same issuer controls. A payments team cannot settle salaries in an instrument whose defence is the issuer’s other token.

03

The operating layer

Ask what assets, legally segregated, a holder can demand if the secondary price leaves one dollar. If the answer is another token from the same system, you do not have a redemption. You have a market.

Write that answer in the product.

04

What is verified

The May 2022 break and the mint-burn design are public, including later enforcement actions. This page does not restate a trading history or a loss figure.

05

What remains unclear

Whether any current token would pass the exogenous-reserve test on its own documents. This page does not survey them.

06

The catch

Calling the episode a black swan hides a design that was visible before it failed. The defence required confidence at the moment confidence left.

Not a comment on any later chain that reused a brand, and not investment advice.

WATCH

What builders should watch

  1. 01Whether redemption pays assets from outside the system.
  2. 02Who runs the defence, and what they are paid.
  3. 03The word the interface uses if the token is not redeemable at par.

BOTTOM LINE

If a holder cannot demand a reserve, do not call the token a dollar and do not put it on a payout rail.

Sources

Blockchain Lab uses public social posts as reporting leads, not as proof. Every published briefing is assessed against primary sources, available documentation and relevant technical context. Social engagement is not used as evidence of the underlying claim.

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