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

# Screen ETFs by Size and Fees

> Filter and rank ETFs by class-level assets under management and by net expense ratio, with the aum_is_derived flag and the fee-coverage rules that decide who can be ranked.

Screening ETFs by size and fees bounds and ranks funds on two of the most-asked measures: assets under management and expense ratio. Both are served with their provenance — `aum_is_derived` says how the size was obtained, and fee coverage is limited to funds that actually file a fee table — so a ranking here never silently invents a number.

<Info>
  **Plan:** Fund · **Credits:** 1 per call; screen facets are free
</Info>

## The Size and Fee Filters

<ParamField query="min_aum" type="number">
  Class-level AUM floor in USD. `max_aum` sets the ceiling.
</ParamField>

<ParamField query="min_expense_ratio" type="number">
  Net expense ratio floor as a decimal — `0.002` is 20 basis points. `max_expense_ratio` sets the ceiling.
</ParamField>

<ParamField query="q" type="string">
  Fund-name substring, case-insensitive, at least 2 characters.
</ParamField>

## How ETF Screen AUM Is Measured

`aum` is always the **class-level** figure: either filed by the fund, or — on multi-class pools where the class does not file its own — derived as published NAV × published shares. `aum_is_derived` says which. A pool-level number is never served as a fund's size, because on a multi-class pool the two differ by three to four times. Funds on multi-class pools where no class size can be derived rank on nothing for `aum` and land in the `unranked` block when that empties a page.

## How ETF Fee Coverage Works

The expense ratio comes from the newest prospectus fee filing per class — gross and net separately, per [ETF Fees](/etf/fees). Unit investment trusts file no fee table at all, SPY and GLD included, so **ranking by `net_expense_ratio` drops them silently**: no fee row is not a zero fee. The response's `unranked` block counts what the sort dropped; re-run with `sort=ticker` to see every match.

## Two Cadences in One Row

Labels refresh monthly, measured columns daily. A newly launched fund can carry full labels while `aum` and fee columns are still null — a label filter finds it, any numeric sort drops it into `unranked`.

## Related Screens

[By asset class](/screening/etf/by-asset-class) · [By flows and premium](/screening/etf/by-flows-and-premium) · [ETF fees](/etf/fees) · [ETF screening overview](/etf/screening)

<RequestExample>
  ```bash cURL theme={null}
  curl "https://api.focusalpha.ai/v1/etfs/screen?segment=equity.sector.health_care&min_aum=1000000000&sort=net_expense_ratio&order=asc" \
    -H "Authorization: Bearer $FOCUSALPHA_API_KEY"
  ```
</RequestExample>

<ResponseExample>
  ```json Response (XLV, fields trimmed) theme={null}
  {
    "data": [
      {
        "ticker": "XLV",
        "name": "State Street Health Care Select Sector SPDR ETF",
        "aum": 43909783508.08,
        "aum_is_derived": false,
        "gross_expense_ratio": 0.0008,
        "net_expense_ratio": 0.0008,
        "net_is_filed": false
      }
    ]
  }
  ```
</ResponseExample>