---
title: "Fair Value Hierarchy"
method: GET
path: "/api/footnotes/fair-value-hierarchy"
tags: ["Footnotes"]
---

# Fair Value Hierarchy

`GET /api/footnotes/fair-value-hierarchy`

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Returns the fair-value hierarchy tables from the footnotes: Level 1 (quoted prices), Level 2 (observable inputs), Level 3 (unobservable inputs), and NAV-measured amounts per measure, for the recurring measurements a filer discloses at each balance date. The widest-covered dimensional dataset in the lake (roughly three quarters of active filers).

Measures served (each only when the filer tagged it): total `assets` and `liabilities` at fair value, `cashEquivalents`, `investments`, available-for-sale (`afsSecurities`) and held-to-maturity (`htmSecurities`) securities, and `derivativeAssets` / `derivativeLiabilities`. Each measure carries the derived `level3Share` = L3 / (L1+L2+L3): the opacity signal.

Monetary values default to **US dollars** (`currency` parameter as on the statements endpoints: period-end spot rate for these balance-date values, `fx` audit block, `currency=original` for as-filed).

**What this data can tell you:**
- Level 3 share: how much of the balance sheet is marked to model.
- Liquidity of holdings (Level 1 vs Level 2 mix).
- Valuation transparency, comparable across filers.
- Size of the derivative book per period.

**Data honesty notes:**
- Only recurring measurements are served; nonrecurring (impairment-driven) measurements are a different disclosure and are excluded in this version.
- The per-asset-class detail (e.g. corporate bonds vs equities per level) is not flattened here; pension plan assets by category x level ship inside the retirement-plans endpoint.
- In the quarterly view the fiscal-year-end table appears as Q4.

## Query parameters

- `symbol` string
- `cik` integer
- `cusip` string
- `composite_figi` string
- `share_class_figi` string
- `currency` string
- `period` 'annual' | 'quarter' — Base reporting period: `annual` or `quarter` (the periods companies actually report, without the derived `ttm` rollup).
- `limit` integer

## Response `200`

Fair-value hierarchy per measure, organized by period

- object[]
  - `period` string, date — The fiscal period end date (YYYY-MM-DD), the balance-sheet date the table is measured at
  - `fiscalYear` integer — The company's fiscal year (handles non-December year-ends).
  - `fiscalPeriod` 'FY' | 'Q1' | 'Q2' | 'Q3' | 'Q4' — Fiscal period of a reported value: `FY` (annual) or `Q1`-`Q4` (quarterly).
  - `measures` object[] — One entry per measure the filer disclosed. Level slots the filer did not tag are omitted.
    - `measure` 'assets' | 'liabilities' | 'cashEquivalents' | 'investments' | 'afsSecurities' | 'htmSecurities' | 'derivativeAssets' | 'derivativeLiabilities' — Stable field name of the measure
    - `concept` string — The XBRL concept that supplied this measure's rows
    - `currency` string, nullable — Currency of the amounts after conversion (the requested `currency` unless listed in `fx.unconverted`); null when mixed
    - `level1` number — Level 1: quoted prices in active markets
    - `level2` number — Level 2: observable inputs
    - `level3` number — Level 3: unobservable inputs
    - `nav` number — Measured at net asset value as a practical expedient
    - `total` number — Total tagged without a level member, when disclosed
    - `level3Share` number — Derived level3 / (level1 + level2 + level3), the opacity signal
  - `dateFiled` string, date, nullable — SEC filing acceptance date of the newest filing contributing to this period. Use this to gate point-in-time data and avoid lookahead bias.
  - `fx` FxConversion — Foreign-currency conversion audit for this period. Every monetary value in `facts` is in the requested `currency` (default **US dollars**). This block is absent when the period was already wholly in the target currency (e.g. a US filer with the default USD, nothing to convert). It is present when one or more line items were originally filed in a different currency and converted on the fly, and it records the exact rate(s) applied so the conversion can be reproduced. Rates come from the Frankfurter API (api.frankfurter.dev). Instant balance-sheet items use the spot rate at period end; flow income/cash-flow items use the day-weighted average rate over the period.
    - `targetCurrency` string, required — The currency (ISO 4217) every `facts` value was converted INTO, the value of the request `currency` parameter (default USD). The literal `original` here means no conversion was requested: each fact stays in its as-reported currency (see `unconverted` for the per-fact mapping).
    - `originalCurrencies` string[], required — Every source currency (ISO 4217) that appeared in this period, the union of converted, unconverted, and already-in-target. The target currency itself is listed when some facts were natively in it (e.g. a foreign filer reporting some lines in USD alongside its converted local currency), so a mixed period reflects its true composition rather than appearing wholly converted.
    - `rates` object[], required — One entry per (source currency, method) actually applied. `rate` is the multiplier: `target = original * rate`.
      - `from` string, required — ISO 4217 source currency that was converted.
      - `method` 'spot' | 'average', required — `spot` for instant balance-sheet items (rate at period end); `average` for flow income/cash-flow items (day-weighted mean over the period).
      - `rate` number, required — Multiply the original-currency amount by this to get the `targetCurrency` amount.
      - `effectiveDate` string, date — Spot only: the date (YYYY-MM-DD) the applied rate was published (≤ period end).
      - `start` string, date — Average only: period start (YYYY-MM-DD).
      - `end` string, date — Average only: period end (YYYY-MM-DD).
    - `unconverted` object — Facts that could NOT be converted (no published rate within tolerance, or an unsupported code/date), grouped by the currency they remain in: each key is a source ISO 4217 code, each value lists the curated fact names in `facts` still in that currency (NOT `targetCurrency`). Absent when everything converted. Use it to know exactly which figures to treat as native currency.

## Other responses

- `400` — Invalid parameters or symbol not found
- `403` — Feature not available on current plan

## Changes

- **2026-08-24** `5ab763e6f203` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/stockfit/apis/stockfit-api/changes/api/footnotes/fair-value-hierarchy/get.md)

---

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