Stacks will open its first Bitcoin protocol bond on September 10, revising the earlier rollout timeline that had anticipated a PoX-5 hardfork around July 29 and a Genesis Bond event in late August 2026. The offering is designed to let BTC holders earn yield while keeping their coins on Bitcoin’s layer 1 under their own keys, without wrapping, bridging or depositing them into a third-party-controlled smart contract. Participants are expected to lock BTC alongside STX tokens through Stacks’ Proof of Transfer consensus mechanism, with an initial annual percentage yield of roughly 3%.