STX Inflation Analysis · July 2026 · Two mints, no burn, supply speeding up

Stacks mints new STX two ways — a miner coinbase reward that halved in April, and a growth-treasury emission that is about to step up — for about 18.9M STX over the next 90 days. Nothing burns it back, so the framework reads about +1.0% net. Our supply monitor reads the last 90 days at +0.89% — a close, clean match. STX is mildly inflationary and accelerating as the endowment mint rises.

The verdict, in one paragraph

For the 90-day window ending July 5 2026, the MrNasdog Pressure Framework reads STX at about +1.0% net on the forward view. Two protocol mints add supply and nothing offsets them. Our supply monitor reads the realized last-90-day change at +0.89%, versus the framework's +0.71% for the same trailing window — a gap of about 0.18 percentage points, well inside the clean band, so no warning chip ships. The forward read runs higher than the trailing one because the SIP-031 growth-treasury mint steps up around July 30 2026, so STX is structurally inflationary and accelerating in the near term, even though the miner reward itself just halved.

Sell pressure: where new STX comes from

Sell #1 — protocol inflation — is the miner coinbase reward, at about 6.5M STX over the next 90 days. Stacks anchors to Bitcoin: a coinbase reward is minted for every Bitcoin tenure a miner wins, roughly 144 tenures a day. The first Stacks halving activated at Bitcoin block 945,000 around April 14 2026, cutting that reward from 1,000 to 500 STX per tenure and dropping the miner-issuance rate to a low-single-digit annual pace. The trailing 90-day window straddled the halving — full reward until April, then half — so realized miner issuance was closer to 7.1M STX.

Sell #3 — Foundation and unscheduled — is the second and now larger mint, at about 12.4M STX over the next 90 days. Under SIP-031, a five-year growth program mints new STX every tenure straight into a community-governed endowment treasury. The stream started at 475 STX per tenure and is scheduled to step up to 1,140 STX per tenure at Bitcoin block 960,300, around Jul 30 2026 — inside this window — which is why the forward mint jumps versus the trailing 6.2M. Sell #2 — vesting unlocks — is zero: the original 2017 sale and genesis allocations to the team and early backers ran out their multi-year schedules years ago, and circulating supply now equals total supply, so no dated cliff hits the window. Sell #4 — long-term locked or bankruptcy — is zero, with no estate or court distribution attached to STX.

Buy pressure: what offsets new STX

Nothing does — every buy row is zero. Buy #1 — programmatic buyback — is not running: SIP-031 names a buyback-and-burn only as a future option, to be switched on if the endowment's liquid assets top roughly $1B, and that trigger has not fired. Buy #2 — protocol fee burn — is zero because STX network fees are paid to miners, not burned, so there is no fee sink. Buy #3 — Foundation buy — and Buy #4 — new long-term lock — are both zero, with no discretionary open-market buying or new escrow announced. With no offset, the full gross mint flows straight through to the net read, which makes STX one of the cleaner inflation cases to model.

Foundation and overhang

STX has no classic unlock cliff left — the genesis distribution is complete. What it has instead is the SIP-031 endowment mint: a continuous, protocol-level issuance into a community-governed treasury, disclosed through public updates, that is deployed for grants, liquidity, marketing and development. Alongside the per-tenure stream, SIP-031 also created a working-capital tranche and a private-placement tranche that sell through locked over-the-counter deals rather than on exchanges, so the treasury pressures supply gradually rather than dumping it. The framework books the endowment issuance in Sell #3 and re-checks the treasury balance and the on-chain mint on a roughly bi-weekly walk; if treasury holdings fall faster than the schedule implies, the extra outflow stays in Sell #3 at the next refresh.

How STX compares to other Bitcoin-anchored chains

STX belongs to the class of uncapped, Bitcoin-anchored layer tokenswhose miner reward halves on Bitcoin's schedule. Like Bitcoin, the coinbase reward steps down by half on a fixed timeline — that April 2026 halving is why the miner mint is now modest, and it will halve again in 2028. Unlike Bitcoin, STX has no hard cap and layers a second, time-boxed growth emission on top, which lifts the near-term rate above where the halving alone would put it. SIP-031 raises the chain's total annual emission from about 3.5% toward an average near 5.75% over five years, then drops it below 2% once the program ends — so STX is mildly inflationary and rising today, but structurally set to trend down.

The contrast worth drawing is with chains that pair issuance with a burn. STX has no burn at all — no fee burn, no active buyback — so the gross mint is the net mint, unlike an exchange token that buys back and destroys supply, or a fee-burning smart-contract chain that can tip net-deflationary under load. For an inflation lens, STX reads as steadily, mildly inflationary, with the rate set to rise into late 2026 as the endowment mint steps up, then ease as the next halving and the end of the growth program arrive.

What to watch in the next 90 days

Watch the growth-treasury emission step-up around Jul 30 2026, when the per-tenure mint rises from 475 to 1,140 STX as the program enters its second year — the single event that lifts Sell #3 and the net read. Watch the endowment's public treasury updates for any shift from locked private sales toward open-market selling, which would move coins to the float faster. Note that no buyback or burn is active, so every net change comes from the mint side. And keep an eye on the SIP-031 burn clause: it only arms if the endowment's liquid assets clear roughly $1B, a level not in sight in this window.

Summary

STX is an uncapped, Bitcoin-anchored gas token with two protocol mints and no burn. The miner coinbase reward halved in April 2026 to about 6.5M STX over 90 days, and a SIP-031 growth-treasury program mints roughly 12.4M more — a share that steps up around July 30 2026 — leaving the framework at about +1.0% net. Our supply monitor reads +0.89% realized over the trailing window, a close and clean match. STX stays mildly inflationary with no offset on the buy side, and the near-term pace is rising as the endowment mint climbs before the next halving and the program's end pull it back down.

MrNasdog Pressure Framework analysis of Stacks (STX), Metric 1 — Inflation. Data + explanation only. Not financial advice. Updated July 5, 2026.