On Ethereum there is a lending market that reports $4,607,853,462 supplied and the same amount borrowed. One address owes almost all of it. The collateral securing that debt is 8,942,941 sdeUSD tokens, and the whole pile is currently priced at nine and a half cents.

No lender put $4.6 billion in. The real money that went into this market was a little under $9 million, and it stopped being withdrawable in November 2025. Everything above that is interest the contract has charged a borrower who is never paying it back.

How a market ends up like this

The market is 0x0f9563442d64ab3bd3bcb27058db0b0d4046a4c46f0acd811dacae9551d2b129, created on February 5, 2025. Lenders supplied USDC. Borrowers posted sdeUSD — the staked version of Elixir's synthetic dollar, deUSD — at a liquidation loan-to-value of 91.5%. For nine months it behaved like any other stablecoin loop, with a supply rate under a tenth of a percent.

Then Stream Finance disclosed in early November 2025 that an external manager had lost roughly $93 million. Elixir had lent about $68 million of deUSD's backing to Stream, and it retired the token days later, promising holders a claims portal and redemption at a dollar. The Block reported the wind-down in November 2025.

Anyone who redeemed got out. The borrower in this market did not. Their sdeUSD is still sitting in the contract, and the oracle now returns a price of $0.0000000107 per token. Morpho's own data flags the market with an oracle_unusable warning and has it unlisted, so it no longer appears in the app's market list.

Why the number keeps climbing

Utilization hit 100% the moment the borrower stopped repaying and lenders tried to leave. Morpho's AdaptiveCurveIRM responds to utilization above its 90% target by raising the rate, and it keeps raising it until the rate hits a hard ceiling written into the contract: a maximum rate at target of 200% APR, multiplied by the curve steepness of 4, for a maximum borrow rate of 800% APR. Compounded continuously, that is 2,979.96% a year.

The market has sat at exactly that number since the last week of November 2025. Ten months of it turned $8.68 million into $4.61 billion. Right now the reported balance grows by about $4 million an hour, and it will pass $10 billion before the end of the year on arithmetic alone.

The borrower's position is $4,598,619,505 of debt against collateral the oracle values at $0.0957. That is a collateralisation ratio of roughly one part in 48 billion.

Reported supply in a market with nothing behind it

Millions of dollars of USDC reported as supplied to market 0x0f9563…, from Morpho's historical state API. The collateral behind it has been worth under a dollar since April 2026. Source: Morpho GraphQL API, read September 6, 2026.

The vaults that count it as money

Ten addresses hold the supply side. Most of them are curated vaults whose operators wrote the position off long ago — MEV Capital's Usual Boosted USDC shows a $1.38 billion position in this market and reports total assets of $2.12 million, which is the honest version.

Two vaults do the opposite. Adpend USDC, at 0x55555815a5595991C3A0Ff119B59AEF6C8B55555, reports $238,994,672 of total assets, all of it this one position. Its 904,308 shares started life at a dollar each and are now marked at $264.28. The vault charges a 50% performance fee, the maximum a Morpho vault can set, on yield that exists only as an accounting entry.

The second one is called 1337 USDC. It reports $127,515,417 of assets across 238,777 shares, each marked at $534.03. Its curator slot is set to the zero address and its timelock is zero seconds, so whoever holds the owner key can change what the vault does with no waiting period. Morpho flags Adpend's deposits as disabled. It does not flag 1337's.

Both vaults are unlisted, so the Morpho app will not surface them. Both are reachable by contract address, and both answer the standard totalAssets() call with a number that any portfolio tracker or tax tool will render as dollars.

What is actually broken here

The contracts are doing what they were written to do. Morpho Blue lets anyone create a market with any oracle, and the protocol's documentation on bad debt is explicit that losses are not socialised automatically: on newer vaults, "the last depositors will face the bad debt" until a curator manually covers it. Nobody covered this one, because there is no one left with an incentive to.

My view is that the permissionless design is fine and the reporting layer is the problem. Morpho hides the market from its app, then serves the $4.6 billion through its public API at face value with a warning attached. DefiLlama leaves it out entirely and reports $4.38 billion for all of Morpho Blue on Ethereum. One dead market claims a bigger balance than a major tracker gives the whole protocol on that chain.

Reading a lending market before you supply to it

Four checks that take a minute

  • Look at utilization. A market pinned at 100% is a market you cannot exit. Anything sitting there for weeks means the borrower is not repaying and the rate is climbing for show.
  • Price the collateral yourself. Pull up the collateral token on a price site. If the oracle number and the market number are far apart, the loan-to-value on the dashboard is fiction.
  • Treat a four-figure APY as a warning. Rates that high are almost always an interest-rate model at its ceiling, not a yield anyone collects.
  • Check the timelock and the fee. Zero seconds means the owner can reallocate your deposit immediately. A 50% fee means half the yield is not yours.

For most readers this specific market is a curiosity, not a risk. The $9 million was lost ten months ago, the wallets involved have moved on, and no new depositor is likely to walk into a vault with a $534 share price by accident.

The habit it should change is smaller and more useful. When a dashboard shows you a balance, that balance is the output of a formula running on a contract, and the formula does not know whether the money is still there. Four and a half billion dollars of it are not.

What to watch next

  • Whether the position is ever written off on-chain. Someone with the owner keys can seize the collateral and realise the loss, which would freeze the counter. Ten months in, no one has.
  • Other unlisted markets from the same period. Two sister sdeUSD markets exist at zero balances. The pattern repeats anywhere a collapsed collateral token was paired with a permissionless oracle.
  • Which trackers pick the number up. The moment a portfolio app reads raw totalAssets() without a listed-market filter, this position becomes somebody's reported net worth.