> ## Documentation Index
> Fetch the complete documentation index at: https://docs.b3os.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Investment Theme Constituents

Fetch the constituent stock symbols of a thematic investing portfolio from Finnhub (e.g. ai, robotics, cybersecurity, fintech). Returns the list of symbols and a count; unknown themes return an empty list. Ideal for: building thematic watchlists, screening stocks by sector trend, feeding symbols into downstream quote or sentiment checks.

Catalog action Blockchain Data

Fetch the constituent stock symbols of a thematic investing portfolio from Finnhub (e.g. ai, robotics, cybersecurity, fintech). Returns the list of symbols and a count; unknown themes return an empty list. Ideal for: building thematic watchlists, screening stocks by sector trend, feeding symbols into downstream quote or sentiment checks.


## At a Glance

| Field | Value |
| --- | --- |
| Action ID | `finnhub-get-investment-theme` |
| Category | Blockchain Data |
| Connector | Not required |
| Requires gas | No |
| Funds movement | None declared |
| Tags | `finnhub`, `stock`, `research`, `discovery`, `read` |

## Payload Schema

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `theme` | `string` | Yes | Investment theme slug \(camelCase\). Known working values include: 'ai', 'robotics', 'cybersecurity', 'fintech', 'cloud', 'gaming', 'drones', '3dPrinting', 'futureFood', 'financialExchangesData'. See Finnhub docs for the full list. Unknown themes return an empty list. |

## Result Schema

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `theme` | `string` | Yes | The requested theme |
| `symbols` | `array` | Yes | Constituent stock symbols for the theme |
| `count` | `number` | Yes | Number of constituent symbols |

## Examples

**Workflow node**

```json
{
  "type": "finnhub-get-investment-theme",
  "payload": {
    "theme": "example-theme"
  },
  "children": []
}
```
  **Test with API**

```bash
curl -X POST "https://api.b3os.org/v1/actions/finnhub-get-investment-theme/test" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "inputs": {
    "theme": "example-theme"
  }
}'
```

**Use expressions for dynamic values**

Payload fields can use workflow expressions such as `{{$trigger.body.amount}}`, `{{$nodes.fetch.result.price}}`, and `{{$props.asset}}` when the value should come from a trigger, prior node, or reusable workflow prop.