Stacks Labs CTO outlines PoX-6 plan for blind auctions and protocol-set BTC yields
In brief
- Adriano Di Luzio, Stacks Labs CTO, discussed PoX-6 in an October 3 video, according to Crypto Briefing.
- PoX-6 bonding capacity would be allocated through consensus-driven blind auctions, not Endowment-set allocations.
- Yield rates would be adjusted on-chain by the protocol rather than by a committee.
- PoX-5 activated July 30 and runs in a bootstrap phase overseen by the Stacks Endowment.
- PoX-6 implementation details haven't been ratified through Stacks governance yet.
What PoX-5 put in place
PoX-6 follows the PoX-5 hard fork. That upgrade activated on July 30, 2026, at Bitcoin block 960,230, per Crypto Briefing, and introduced Bitcoin staking through a structure called protocol bonds. Participants lock BTC on Bitcoin Layer 1 and pair it with STX on the Stacks network (existing STX stackers kept their rewards through the upgrade). The community vote on SIP-045, the proposal behind PoX-5, passed with over 99.99% approval.
It isn't fully hands-off yet. PoX-5 runs in a bootstrap phase overseen by the Stacks Endowment, and key parameters are curated rather than set automatically during that period. Crypto Briefing reported that targets for institutional participants sit around a ~3% APY on BTC, with a 5% minimum STX pairing, and that institutional participation has already begun.
What changes with PoX-6
PoX-6 is planned as the fully decentralized, algorithmic end state of the Stacks staking model. That's the shift Di Luzio walked through.
Instead of the Endowment setting allocations, bonding capacity would be distributed through consensus-driven blind auctions. Participants would submit bids without seeing what others offer (a format used to limit gaming and front-running). Yield rates would be adjusted on-chain by the protocol itself rather than by a committee, and both reservation and yield adjustment are expected to rely on consensus-encoded mechanisms.
STX doesn't go anywhere. It remains the native token used for stacking and locking under both PoX-5 and PoX-6.
Still a proposal
None of this is final.
Specific implementation details for PoX-6 haven't been ratified and still need to pass through Stacks' governance process. Crypto Briefing reported that performance metrics from the PoX-5 bootstrap phase are expected to shape the parameters and guardrails of the next version.
In its own analysis, the outlet said moving to auctions and algorithmic yields could reduce reliance on the Stacks Endowment and make the system more transparent. It also noted that the pairing requirement means any growth in BTC participation routes demand through the Stacks token.
Leadership is changing too. Stacks Labs founder Muneeb Ali is set to take over as permanent CEO on October 15, according to Crypto Briefing.
Frequently asked questions
What is PoX-6 on Stacks?
PoX-6 is the next planned version of the Stacks network's Proof of Transfer mechanism. It's planned as the fully decentralized, algorithmic end state of the Stacks staking model. Its implementation details haven't been ratified and still need to pass through Stacks' governance process.
How is PoX-6 different from PoX-5?
PoX-5 runs in a bootstrap phase overseen by the Stacks Endowment, and key parameters are curated during that period. Under PoX-6, bonding capacity would be distributed through consensus-driven blind auctions, and yield rates would be adjusted on-chain by the protocol rather than by a committee.
How does Bitcoin staking work under PoX-5?
PoX-5 introduced Bitcoin staking through protocol bonds. Participants lock BTC on Bitcoin Layer 1 and pair it with STX on the Stacks network. Crypto Briefing reported targets for institutional participants of around a ~3% APY on BTC, with a 5% minimum STX pairing.
