Jupiter, Solana's largest decentralized-lending platform, launched version 2 (v2) of its Lend product on Monday, enabling deposits and borrowed positions to simultaneously function as trading liquidity — allowing the same capital to earn both lending interest and a share of swap fees.

The upgrade introduces two optional features: Smart Collateral and Smart Debt. Smart Collateral automatically pairs a deposit of USDC, USDT, SOL, or JupSOL into a correlated liquidity pool, enabling the assets to earn yield on loans while also generating trading fees and, where applicable, staking rewards from a single position. Smart Debt applies the same mechanism to borrowed assets, so fees produced by a debt position help offset the cost of the loan. Users who prefer conventional lending can opt out of both features.

The additional yield, however, depends on traders actually routing swaps through those pools. Jupiter operates Solana's largest swap router — the software most wallets and applications use to find the best prices across venues — and now also owns the pools that rely on that flow. The company told CoinDesk that the router does not favor its own vaults and directs swaps to wherever pricing is most favorable. This vertical integration of routing and pool ownership places Jupiter in a position analogous to a traditional exchange operator that also runs the matching engine, raising structural questions about how DeFi protocols balance their dual roles as venue operators and neutral infrastructure — a tension that has surfaced across the sector as large platforms expand beyond their original functions.

According to DefiLlama data, Jupiter Lend currently holds approximately $1.9 billion in deposits and generated $1.6 million in fees over the past 30 days, equating to roughly 1% annually on deposited capital before any revenue split with the protocol. Token Terminal data show active loans at $822.7 million, fluctuating between $600 million and $900 million since September. Both deposits and loans have declined over the past month.

The risk of pairing assets falls unevenly. Jupiter stated that margin is valued using primary market oracles — data providers that feed price information — meaning temporary price dislocations on an exchange do not trigger liquidations. Positions liquidate as normal once their loan-to-value ratio crosses the threshold. A genuine depeg, however, is treated differently. On the debt side, borrowers are protected: someone borrowing $100 split between USDC and USDT would see the pool rebalance into whichever asset held its value and still owe $100. On the collateral side, no such protection exists — a supplier bears the loss on both assets if either one breaks its peg. That asymmetry reflects a design choice that prioritizes protocol solvency over symmetric risk-sharing, an approach consistent with how lending protocols have historically prioritized keeping the system overcollateralized during stress events.

Jupiter has therefore confined the correlated-pair design to stablecoins paired against each other and SOL paired against its staked versions, excluding volatile assets.

"There's been a wall between the two primary ways people earn APY onchain, lending and LPing," said Kash Dhanda, Jupiter's chief operating officer, referring to lending and supplying liquidity to exchanges. The observation points to a structural inefficiency that has persisted across DeFi since its earliest designs: capital committed to lending cannot simultaneously serve as market-making liquidity, and vice versa, leaving a portion of each dollar idle. He said the design enables Jupiter to offer higher deposit rates and cheaper borrowing, with terms improving as the vaults attract more trading volume. "It is not about just serving existing loans, but providing efficiency to grow the entire market."

Jupiter said it expects a combination of new loans and migrated positions but did not provide a specific target or cap. The protocol's loan book has remained stagnant over the past year, and the coming weeks of active-loan data will indicate whether improved yields were the factor constraining growth. Competing lending protocols across major chains have similarly searched for mechanisms to reinvigorate flat or declining loan demand, making Jupiter's results a data point the broader sector is likely to monitor.

Source: CoinDesk