Metropolis DLMM

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Metropolis DLMM is a Joe Liquidity Book-based DEX on Sonic that places liquidity into discrete price bins. Swaps convert inventory as bins are crossed, while fees compound in active bins. Metropolis expressly warns of impermanent and divergence loss. The 2026-08-16 survey measured about $0.19M. We reject direct DLMM inventory under the version-1 AMM-LP dossier; dynamic fees and zero-slippage execution within a bin do not eliminate adverse asset conversion.

Kill criteria: the events that revoke this verdict
• Ships a product line without impermanent-loss exposure that merits its own review

The research file

Mechanism applicability

Providers allocate tokens across discrete price bins and earn 80% of trading fees when their bins are crossed; the remaining 20% goes to METRO stakers. Fees automatically compound in the active bin. Metropolis documents normal, spot and ladder strategies in which price movement converts one token into the other and creates impermanent or divergence risk.

Control and exit applicability

The pool creator fixes bin step and base-fee settings at creation, while a volatility-based dynamic fee changes as swaps cross bins. LPs choose their range and strategy and can withdraw direct positions with accumulated fees; nevertheless, exit inventory depends on which bins traded. Token quality, rebalancing, contract operation, pool depth and Sonic settlement remain loss and liquidity dependencies.

Current observation and perimeter

The DefiLlama API read on 2026-08-16 classified Metropolis DLMM as a DEX and reported approximately $0.19M entirely on Sonic. Metropolis separately offers Uni V2 pools, curated Maker Vaults, METRO staking and NFTs. This application covers only direct measured DLMM liquidity, not the delegated Maker Vault record.

Why the class rule decides

A direct DLMM position is still client-owned market-making inventory whose token composition changes against traders. Bin granularity and dynamic fees alter execution but not that exposure, so the version-1 AMM-LP dossier is fundamental. Reopen only for an economically separate Metropolis product without paired inventory; managed Maker Vaults require their own control analysis.

Sources

The claims above trace to these. Where a number could not be independently verified, the thesis says so.

• Metropolis Docs — current protocol overview · primary · accessed 2026-08-16
  Supports: Sonic, Joe Liquidity Book, DLMM, separate Maker Vaults and V2 pools
• Metropolis Docs — DLMM pools and bins · primary · accessed 2026-08-16
  Supports: price bins, fee split, auto-compounding, withdrawal, impermanent loss
• Metropolis Docs — DLMM strategies · primary · accessed 2026-08-16
  Supports: range strategy, token conversion, divergence risk, rebalancing, withdrawal
• Metropolis Docs — dynamic fees · primary · accessed 2026-08-16
  Supports: base fee, pool creator, volatility fee, per-bin distribution
• DefiLlama — Metropolis DLMM survey record · secondary · accessed 2026-08-16
  Supports: current TVL, Sonic perimeter, DEX category

Inherited controls

The verdict above grades the protocol layer. Every position also inherits the asset it holds and the chain it settles on. The least safe layer sets the position’s grade, and the position table names which one that is.