> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blockdb.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Yields Streams Overview

> Subscribe to real-time rolling pool yield and ROI predictions.

## Overview

The Yields stream provides real-time updates to rolling yield/ROI predictions per pool.

## Stream Matrix

| Stream                                     | Summary                              | Dataset ID |
| :----------------------------------------- | :----------------------------------- | :--------- |
| [Yields](/wss-reference/evm/yields/yields) | Real-time pool yield/ROI predictions | `0411`     |

## Parameter Conventions

<ParamField body="chain_id" type="number" required>
  Chain identifier for the target EVM network.
</ParamField>

<ParamField body="target_period_days" type="number">
  Target prediction horizon (e.g., 1, 7, 30).
</ParamField>

<ParamField body="pool_uids" type="string[]">
  Filter by specific BlockDB pool identifiers.
</ParamField>

## See Also

* [Yields Reference](/api-reference/evm/yields/yields) — For detailed schema descriptions.
* [Introduction](/wss-reference/overview/introduction) — Protocol and authentication details.