Zest Protocol’s levered Bitcoin staking vault begins accruing yield on Stacks

Zest Protocol’s new levered Bitcoin staking vault is now live on Stacks. The zvstBTC vault, the protocol’s first automated Stacks Vault product, marks a notable step in the slow but steady effort to make Bitcoin actually productive in DeFi.

The concept is straightforward in theory, even if the plumbing underneath is anything but. Users deposit Bitcoin assets like stBTC or BTC into the vault and receive zvstBTC shares in return. The vault then runs a leveraged loop: posting stBTC as collateral in Zest’s lending market, borrowing sBTC against it, and recycling those borrowed assets back into staking positions to amplify the base yield.

How the yield math works

The unlevered staking rate for stBTC, the liquid staking token issued by Stacking DAO, sits at roughly 2.6% APY. Zest’s vault aims to stretch that to 6-8% APY through its looping strategy.

The gains don’t arrive as separate token distributions. Instead, they accrue directly into the vault’s net asset value, meaning the price of each zvstBTC share gradually increases over time.

Initial deposits are capped at 10 BTC. That’s a deliberate constraint, not a limitation born of low demand. Capping early capacity lets the protocol stress-test the strategy with manageable risk before opening the floodgates.

Zest’s track record and the trust question

Zest Protocol’s Stacks lending market has maintained a peak total value locked of over $100 million. More importantly, it has reported zero bad debt since launching in March 2024. The vault’s architecture relies on two key assets within the Stacks ecosystem: stBTC, issued by Stacking DAO, provides the base staking yield and serves as the primary collateral, while sBTC functions as the borrowable asset that enables the leverage loop.

What this means for Bitcoin DeFi

A 6-8% target APY on Bitcoin is competitive with many Ethereum-based staking products. The Stacks network settles directly to Bitcoin’s base layer, which matters for the subset of investors who care deeply about where their trust assumptions actually live.

Zest has also introduced STX token incentives to encourage broader participation in the vault ecosystem.