Leveraged Yield Farming on Sui: How the Scallop Farm Works

Most yield farming is limited by how much capital you bring. Leveraged farming removes that limit by borrowing against your deposit and putting the borrowed amount to work alongside it — so a given deposit controls a larger position than it otherwise could. JewelSwap runs this on Sui, on top of Scallop's lending markets, with veSCA boosting layered on top.

The structure is worth understanding properly, because leverage amplifies whatever the underlying position does — including when the underlying is losing money.

The four steps

A deposit runs through the same sequence every time, and the protocol handles all of it in one transaction:

1. You deposit a collateral token.
2. The protocol borrows a debt token against it from Scallop's markets.
3. The borrowed amount is supplied back into the lending market to earn yield.
4. Rewards accrue, are harvested automatically, and are folded back into the position.

What you hold at the end is a single position — ownership is represented as an NFT — rather than a set of separate deposits and debts you have to manage yourself. Unwinding reverses the sequence in one step.

Where the 2.86x comes from

The leverage figure is not a dial you set. It falls out of Scallop's collateral weight, which is 65% — meaning you can borrow up to 65% of the value you deposit.

Recursively, that converges to a position of 1 ÷ (1 − 0.65) = 2.86x your deposit. The remaining 35% is the safety margin standing between the position and liquidation.

This matters more than it first appears: the 35% buffer is what absorbs adverse price movement and accrued borrow interest. It is not spare capacity waiting to be used.

The three yield sources

The return is not one number from one place. It is three streams, with very different reliability:

• Base lending yield. The supply APR from the lending market, which moves with supply and demand. Compounded automatically.
• Borrow incentive rewards. SUI and SCA tokens paid out by Scallop's incentive programme — and the component that veSCA boosting multiplies, by up to 4x.
• Protocol fee sharing. Split 70% to position holders, 15% to veSCA stakers, 15% retained as protocol fees.

The APR formula, honestly

The headline number comes from combining those streams against the leverage multiple:

Total APR = (Supply APR − Borrow APR) × Leverage + (Base Incentive APR × veSCA Boost)

Run the worked example from the documentation and something important shows up:

• Supply APR 9.38%, Borrow APR 13.43% → net lending yield of −4.05%
• Levered 2.86x → −11.58%
• Base incentive 10% × 4x veSCA boost → +40%
• Total: 28.42%

Read that carefully. In this example the lending leg loses money, and leverage makes it lose more. The entire return — and then some — comes from the incentive programme and the veSCA multiplier.

That is not a flaw in the design, but it is the single most important thing to understand about it. The position is a bet that incentives keep outpacing the borrow cost. When borrow rates rise or emissions taper, the carry inverts, and it does so quietly. We covered this failure mode in detail in delta-neutral yield farming.

Why veSCA is the load-bearing part

Without the boost, the example above returns roughly −11.58% + 10% = a small loss. With the 4x multiplier it returns 28.42%. The multiplier is not a bonus on top of a good position; in incentive-driven markets it is frequently the difference between a position that works and one that does not.

JewelSwap holds the veSCA position at the protocol level and subscribes farm positions to it, so depositors get boosted rewards without individually locking SCA for years. That is the main structural advantage of farming through the protocol rather than assembling the same position by hand.

The live farms

Two pairs run today, and they are deliberately different shapes:

• suiUSDT–USDC — a stablecoin pair. Both legs track the dollar, so price divergence between them is minimal and the dominant risks are rate and incentive risk rather than market direction.
• sbwBTC–zwBTC — two Bitcoin representations from different issuers. Because both price off BTC, the position is close to delta-neutral on Bitcoin's price. Its real exposure is the spread between the two wrappers: if one depegs, a position designed to have no direction becomes a leveraged bet on that spread. See earning yield on Bitcoin in DeFi for why wrapper diligence comes before yield comparison.

Both are same-asset structures, which is what keeps them low on directional risk and high on the risks that actually matter here: rates, incentives and pegs.

Liquidation still applies

A position whose two legs track each other is not exempt from liquidation. Borrow interest accrues continuously while the collateral does not necessarily grow to match, so the health of the position drifts toward the threshold over time even with prices completely flat. The 35% margin is consumed slowly by carry, not just by price moves.

Positions are tracked against Scallop's obligation system with oracle pricing, and the protocol monitors health, but the responsibility to size sensibly is yours. How DeFi liquidations work and crypto loan LTV explained both apply directly.

What to check before depositing

1. Compare the current borrow APR against the supply APR. If the net is negative, you are relying entirely on incentives.
2. Check what the incentive APR is today, not what the documentation example used.
3. Confirm the veSCA boost is active on the farm you are entering.
4. For the BTC pair, satisfy yourself on both wrappers independently — issuer, custody model, redemption.
5. Size for the 35% buffer being eroded by carry over the holding period, not just by volatility.
6. Know the unwind path and whether the exit pool is deep enough at the size you hold.

Getting started

The farms are live at sui.jewelswap.io/farm/scallop. Deposits, compounding and unwinding all run through that interface, and full parameters are in the Scallop yield farming documentation. The underlying lending markets are Scallop.

For the wider Sui picture see best DeFi platforms on Sui, and for the mechanics of leveraged farming generally, the beginner's guide to leveraged yield farming.

Frequently asked questions

What is leveraged yield farming?

Depositing collateral, borrowing against it, and deploying the borrowed amount alongside your own so the position is larger than your capital. Returns and losses are both amplified by the leverage multiple, and the borrow cost is paid out of the farming yield rather than out of pocket.

How much leverage does the Scallop farm use?

2.86x, which follows from Scallop's 65% collateral weight: 1 ÷ (1 − 0.65). It is a property of the market's parameters rather than a setting you choose, and the remaining 35% is the buffer against liquidation.

What is veSCA boosting and why does it matter?

veSCA is Scallop's vote-escrowed token, and holding it multiplies borrow incentive rewards by up to 4x. In markets where the lending leg alone is negative, that multiplier is often the entire return. JewelSwap holds veSCA at the protocol level so depositors receive boosted rewards without locking SCA themselves.

Can I lose money in a leveraged farm?

Yes. If the borrow rate exceeds the supply rate the lending leg is negative and leverage multiplies that loss, leaving incentives to make up the difference. You can also be liquidated: borrow interest accrues continuously and erodes the 35% margin even when prices do not move.

Which pairs are available?

Two farms run today: suiUSDT–USDC, a stablecoin pair, and sbwBTC–zwBTC, a pair of Bitcoin representations. Both are same-asset structures, so directional price risk is low and the meaningful exposures are borrow rates, incentive levels and the peg between the two legs.

Is the advertised APR guaranteed?

No. The formula combines a lending spread that moves with market utilisation and an incentive rate set by a protocol emissions programme. Both change without notice. Treat any quoted APR as a snapshot of current conditions, and recompute it with incentives valued at zero to see the durable component.