JustLend DAO, the dominant lending protocol on the TRON blockchain, launched Supply and Borrow Market V2 (SBM V2) on June 17, marking its most significant structural upgrade since inception. The new architecture replaces shared liquidity pools with a dual-layer Vault and Market design that isolates collateral risk across independent borrowing markets.
The V2 system separates depositors from borrowers through a Vault-and-Market structure. Users deposit a single asset like USDT into a Vault, which serves as a central liquidity pool and distributes funds to multiple lending markets. Depositors earn aggregated yield from all connected markets, while borrowers interact individually with each Market by pledging approved collaterals. Each Market operates autonomously with its own loan-to-value and risk parameters, preventing a price drop in one collateral type from triggering cascading liquidations in other markets using the same vault funds.
Alongside the structural change, JustLend introduced an Adaptive Curve Interest Rate Model to replace the former Jump Curve. The new model dynamically shifts the entire rate curve based on real-time utilization, lowering borrowing costs when demand is low and raising them when utilization spikes, aiming to maintain optimal capital efficiency without manual parameter adjustments.
The upgrade aligns JustLend with a broader DeFi trend toward isolated lending designs. Protocols like Euler V2 and Morpho Blue have already adopted similar modular vault systems on Ethereum, addressing systemic risk that plagued earlier shared-pool models. JustLend’s move signals that this risk architecture is now an industry standard, not just an Ethereum-native concept. With billions in total value locked, the migration is operationally significant even if the design is familiar.
JustLend continues its revenue-backed token reduction strategy alongside the upgrade. In Q1 2026, the protocol completed its third JST buyback and burn, removing 271.3 million JST—worth roughly $21.3 million—pushing cumulative burns to over 1.35 billion tokens, or 13.70% of total supply. Governance over risk parameters remains with JST holders through the JustLend Improvement Proposals framework.
