Onchain tranching is positioning itself as the future of structured finance in DeFi

That’s the core thesis behind a growing push to bring structured finance onchain. Silvio Busonero, advisory lead at Blockworks, published an analysis on July 7 arguing that onchain tranching, while still a sliver of the DeFi lending market, represents one of the most promising growth vectors in decentralized finance.

A tiny slice with outsized ambitions

Onchain tranching accounts for less than 1% of total DeFi lending deposits. In a market where looping, the recursive borrowing strategy that essentially stacks leverage on top of leverage, drives roughly 40% of DeFi lending revenues, tranching barely registers as a rounding error.

But Busonero’s argument isn’t about where tranching is today. It’s about what it represents: the DeFi equivalent of a $15 trillion structured finance market in traditional finance.

The mechanics work like this. A lending pool gets split into tranches with different risk profiles. Junior tranche depositors absorb losses first, acting as a cushion for senior tranche depositors who sit higher in the repayment waterfall. In exchange for taking on that first-loss risk, junior participants earn higher yields. Senior participants get lower but more stable returns with built-in protection.

Protocols building in this space include Royco, Strata, Reflect on Solana, and Pareto’s onchain credit facilities, including what’s referred to as the FalconX vault.

Tranching vs. looping: two philosophies of risk

Looping is the dominant revenue engine in DeFi lending today. A user deposits collateral, borrows against it, redeposits the borrowed assets as new collateral, borrows again, and repeats. It generates significant protocol fees, accounting for roughly 40% of DeFi lending revenues.

Tranching offers a fundamentally different philosophy. Instead of relying on liquidation waterfalls to manage risk after the fact, it structures risk allocation upfront. Junior-first-loss protection means that losses are absorbed in a predictable order. Cooldown periods prevent bank-run dynamics. Dynamic coverage pricing adjusts the cost of protection based on market conditions.

Busonero contends that in various scenarios, tranching delivers superior risk-transfer capabilities compared to looping. The two approaches could coexist, with tranching handling the more nuanced risk allocation that institutional capital increasingly demands.

What this means for investors

Busonero predicts that the fastest growth in DeFi will come from combining tranching with traditional lending practices, particularly through senior tranches. Senior tranches offer the kind of risk-adjusted returns that appeal to larger, more conservative allocators.

For the existing DeFi user base, tranching introduces a new dimension of strategy. Rather than simply choosing between lending and not lending, participants can calibrate their exposure. Want higher yield and can stomach being first in line for losses? Junior tranche. Want something closer to a fixed-income product with downside protection? Senior tranche.

The competitive landscape among tranching protocols is still early enough that picking winners is premature. Royco, Strata, Reflect, and Pareto are building different takes on the same concept.

If tranching grows from its current sub-1% share even to low single digits of DeFi lending deposits, the impact on protocol design and capital flows could be substantial.