The collapse of a major algorithmic stable-value token destroyed enormous value within days and had been anticipated in published critiques.
The mechanism
The token maintained its peg through an arbitrage relationship with a paired volatile token.
Which allowed holders to exchange one for the other at a fixed nominal value.
When the stable token traded below peg, arbitrageurs could redeem it for the volatile token and profit.
Why that fails
The mechanism depends on the volatile token having value.
Which it derives largely from demand for the stable token.
If confidence falls, redemptions increase the volatile token's supply while demand for it collapses, and both fall together.
The reflexivity problem
The system worked while it was growing and was structurally unstable when contracting.
Which critics described in detail before the collapse.
Similar designs had failed at smaller scale previously, which was documented.
The yield programme
A lending protocol offered a high fixed return on deposits of the stable token.
Which drove adoption and was subsidised rather than generated.
Subsidised yield attracting capital that leaves when the subsidy is questioned is a recurring pattern.
The reserve fund
Assets accumulated to defend the peg.
Which were deployed and proved insufficient against the scale of redemptions.
Selling reserves into a falling market accelerated the decline.
The speed
The unwind took days rather than weeks.
Which is a feature of systems where redemption is instant and information travels instantly.
Conventional bank runs are slowed by operating hours and settlement times; this one was not.
The consequences
Contagion through lenders and funds exposed to the ecosystem, producing further failures over subsequent months.
Which demonstrated the interconnection between apparently separate entities.
The regulatory response
Several frameworks introduced afterwards effectively exclude designs not backed by reserves.
This is historical analysis rather than advice about any asset.
Prior warnings
Academic and industry analysts published critiques identifying the reflexivity problem before the failure.
Which were publicly available and were dismissed at the time.
Earlier smaller designs using similar mechanisms had already failed, providing direct precedent.
The defence attempt
Reserve assets were sold to support the peg during the initial deviation.
Which provided temporary support and depleted the reserve.
Once the reserve was visibly exhausted, confidence collapsed entirely.
The token supply spiral
Redemptions minted the paired token in enormous quantities.
Which diluted it beyond any possibility of recovery.
Supply expanded by orders of magnitude within days, which is observable in the chain data.
Legal consequences
Regulatory and criminal proceedings followed in multiple jurisdictions.
Which concerned representations made about the mechanism's stability.
Published filings set out the allegations in detail.
What survived
Reserve-backed designs with published attestations, which are a fundamentally different construction.
Conflating the two categories under one term was part of the problem.
The scale of losses
Tens of billions in nominal value disappeared within a week.
Which affected retail holders who had understood the token as a stable savings instrument.
Reports of severe personal financial harm followed and were widely documented.
Ecosystem effects
Protocols and applications built on the network became inoperable.
Which affected developers and users beyond token holders.
A revived chain was established afterwards with a separate token.
Institutional exposure
Funds and lending platforms with positions failed in the following months.
Which is how the collapse propagated into the wider sector.
Several failures that appeared unrelated traced back to this exposure.
The naming problem
Describing a reflexive algorithmic design and a reserve-backed instrument with the same term.
Which contributed directly to holder misunderstanding.
Regulatory frameworks now distinguish them explicitly.
The general principle
A peg maintained by market incentives rather than by redeemable reserves depends entirely on confidence.
Why it still matters
The design was publicly criticised on precisely the grounds on which it failed, by named analysts, in advance.
Which makes this an unusually clean case study in a warning being available and disregarded.
The scale of retail participation at the point of collapse is what made the consequences severe rather than merely instructive.
Reading the primary material
Chain data showing the supply expansion, the reserve deployment and the redemption volumes is fully public.
Which allows the sequence to be reconstructed hour by hour.
Regulatory filings and court documents set out what was represented to holders and when.
The distinction worth carrying forward
Backed by reserves and redeemable at par, or maintained by incentives. These are different products sharing a name.
The one sentence version
A peg supported by demand for a token whose value depended on the peg, which works while growing and unwinds violently otherwise.
A note on the yield
The near-twenty percent return offered on deposits was the primary driver of adoption and was subsidised from a reserve.
Everyone could see the rate; comparatively few asked where it came from, and the answer was publicly available.
A yield that high is either a subsidy or a risk, and it was disclosed as neither.