Stacks is set to activate its PoX-5 hard fork this week at Bitcoin block 960,230, expected around 2 a.m. Eastern Time on Thursday, July 30. The upgrade introduces Bitcoin Bonds, allowing users to lock BTC on the Bitcoin network and pair it with STX on Stacks to earn BTC-denominated yield while retaining control of their Bitcoin keys. Existing STX stakers must restake after activation to continue receiving BTC rewards, as all STX currently committed through the previous contract will unlock during the upgrade. The new model prioritizes target yield for Bitcoin Bonds, then distributes 85% of remaining miner-committed BTC to STX-only stakers, with 15% going to a reserve fund. Stacks plans to begin the Bitcoin staking rollout with an institutional Genesis Bond in late August before expanding capacity to additional participants.
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