Alpha Emission

Each subnet emits up to 1.5 α per block (post-Dec-2025 halving), split between two destinations:

• alpha_in — alpha injected into the subnet’s liquidity pool. Max 0.5 α/block.
• alpha_out — alpha paid to the subnet owner, miners, validators, and stakers. 1 α/block.

alpha_in and alpha_out are governed by independent rules and currently halve on different schedules. See Halving for the full schedule.

alpha_in (max 0.5 α/block)

Each block, the chain injects tao into the subnet pool and mints a matching amount of alpha to keep the pool’s tao : alpha ratio balanced.

The amount of alpha injected equals the tao injected divided by the current alpha price:

alpha_in = tao_injected / alpha_price

Cap: alpha_in ≤ 0.5 α/block

If the formula above would produce alpha_in > 0.5, the tao_injected is reduced until alpha_in = 0.5. The leftover tao becomes a chain buy — the chain buys alpha from the pool. The alpha purchased this way is not recycled; it is held in a protocol wallet and redistributed to alpha holders if the subnet is dissolved. See Tao Emission for the full mechanic.

(Before the Dec 2025 halving the cap was 1 α/block; it halved alongside tao emission.)

alpha_out (1 α/block)

alpha_out is a flat 1 α emitted per block per subnet, distributed to the subnet owner, miners, validators, and stakers via the standard incentive split. It is not affected by the December 2025 tao halving.

alpha_out will halve on its own schedule, when 10.5M alpha have been issued in that subnet — see Halving.

To learn how this 1 α is split across participants, see Subnet emission overview.

Worked example (post-halving)

Subnet has emission share 12% and alpha price 0.04258 τ.

• tao emitted to this subnet: 12% × 0.5 τ = 0.0597 τ
• max alpha_in × price = 0.5 × 0.04258 = 0.02129 τ (tao actually injected)
• excess tao (used for chain buy, alpha held in protocol wallet): 0.0597 − 0.02129 = 0.03841 τ
• alpha_in this block: 0.5 α (at cap, pool was tao-rich relative to alpha)
• alpha_out this block: 1 α (unchanged)

Total alpha entering the subnet ecosystem this block: 1.5 α.

See also

• Halving — current emission ceilings and the halving schedule.
• Tao Emission — how 0.5 τ/block is split into pool injection and chain buys, and what happens to chain-buy alpha (held in protocol wallet, redistributed on subnet dissolution).
• Subnet emission overview — how alpha_out is distributed across owner, miners, validators, and stakers.