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

# Market coverage

> Universe size, scenario horizons, and endpoint coverage.

David is designed to mirror the breadth of a real market-data vendor while remaining fully synthetic.

## Universe size

David covers **16,143 real public US symbols**, sourced from SEC and Nasdaq listings, and every scenario can address the full set.

<Info>
  Company facts, prices, fundamentals, filings, news, events, and ownership are generated deterministically from the scenario and ticker, giving broad real-symbol coverage across the universe.
</Info>

## Horizons

Scenarios deliberately mix time horizons rather than forcing one length:

| Horizon              | Typical span    |
| -------------------- | --------------- |
| Full panel           | \~30 years      |
| Business-cycle panel | several years   |
| Annual event study   | \~1 year        |
| Focused event window | weeks to months |

A scenario's actual span is given by its `start_date` and `end_date`. Trading days are synthetic calendar days. See [Date semantics](/concepts/date-semantics).

## What's covered

Every scenario serves the full market-data surface: prices, financial statements (normalized, as-reported, and segmented), financial metrics and screeners, KPI and non-GAAP metrics, earnings and guidance, analyst estimates, news, SEC-style filings, insider trades, institutional and index-fund holdings, corporate actions, a macro tape, and central-bank rates. See the [API reference](/api-reference/overview) for the complete list.

## Next steps

<CardGroup cols={2}>
  <Card title="Ticker universe" icon="hashtag" href="/concepts/ticker-universe">
    Instrument types and which datasets each one serves.
  </Card>

  <Card title="API reference" icon="code" href="/api-reference/overview">
    Every endpoint, parameter, and response field.
  </Card>
</CardGroup>