First Bitcoin bond takes shape: how does miner funding achieve 17.9x dividend coverage?

Stacks launched its Genesis Bond on September 10, 2026, the first native Bitcoin bond, pairing 230 BTC with 3.57 million STX and paying BTC-denominated yield from miners' Proof-of-Transfer bid pools. In the first full cycle, miner contributions covered bond payouts 17.9 times over, far exceeding the 2x safety target set in SIP-045, and at September 30 prices the surplus could support up to 2,534 BTC of issuance—roughly 11 times the Genesis Bond's size. Bond 2's full 505 BTC allocation was subscribed by October 12 with over 6.7 million STX locked, bringing total bond-locked BTC to 735, while cycle 144 distributed 7.73 BTC, up 58% quarter-on-quarter and enough to cover about 3,220 BTC at the 2x standard. The yield product is feeding on-chain credit: Zest V2's outstanding loans rose 132% to $14.75 million, 81% of Stacks' $88.9 million DeFi TVL, and the new liquid staking token stBTC sold out its first 150 BTC tranche in under 24 hours. sBTC supply fell 15.6% to 2,487 BTC in Q3, though September saw a net mint of 49 BTC and October brought 483 BTC into Bond 2 via StackingDAO. STX gained 61.5% against BTC since June 30, closing the quarter at 444 sats; watch whether STX reaches roughly 529 sats to support the 3,000 BTC issuance target at 2x coverage, and whether stBTC-driven leverage keeps expanding Zest's loan book without stress.