# Stacks SRB

STXSRB is a benchmark representing the mean, annualized staking rate across all active Stacks stacking methods.

STXSRB is calculated and published by Staking Rewards via the [Stacks Profile](https://www.stakingrewards.com/asset/stacks) and [Data API](https://www.stakingrewards.com/data-api).

> **TL;DR:** Stacks stacking rewards come from Bitcoin spent by miners in each stacking cycle. The reward rate equals the BTC value spent per cycle divided by total stacked STX value in USD.

### STX Staking Rewards Rate: STXSRB

$$
STXSRB = sr / st
$$

<table><thead><tr><th width="149">Formula key</th><th width="180">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>sr</td><td>Stacking Rewards</td><td>The amount of BTC spent in a cycle.</td></tr><tr><td>st</td><td>Stacked Tokens</td><td>The amount of stacked STX in USD.</td></tr></tbody></table>

***

### STX Staking Reward Rate: STXSRB(v)

Staking Rewards calculates the STXSRB for each validator based on their individual commission and if delegations are accepted.

$$
STXSRB(v) = STXSRB \*(1-cr)
$$

<table><thead><tr><th width="142">Formula key</th><th width="208">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>cr</td><td>Commission Rate</td><td>The percentage commission rate the validator has set as a delegation fee for all delegators.</td></tr></tbody></table>

***

***

### STX Real Reward Rate: STXSRB^R

The real reward rate calculates the STXSRB adjusted for inflation in the network.

$$
STXSRB^R=1 + STXSRB/(1+ir) -1
$$

<table><thead><tr><th width="140">Formula key</th><th width="144">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>ir</td><td>Inflation Rate</td><td>New STX entering the circulation supply.</td></tr></tbody></table>

***

#### Data Sources:

* [Stacking Tracker API](https://api.stacking-tracker.com) - signer/pool staking data and per-cycle APY
* [Hiro Stacks API](https://docs.hiro.so/stacks/api) - supply data (`/v2/pox`), block timestamps, PoX cycle information
* CoinGecko - price data

***

#### References:

* [Stacks Docs](https://docs.stacks.co/concepts/stacks-101/proof-of-transfer)

***

:books: [Learn more about Stacks Staking](https://www.stakingrewards.com/asset/stacks)

:gear: [Access historic Stacks Staking Data via API](https://www.stakingrewards.com/data-api)

```
Last updated on 04/17/2026
```


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