# Instrument index factors

Time series of index-factor observations for inflation-linked
instruments.

## Endpoints

GET /v3/instruments/:id/index-factors
  Fetch the index-factor history.

POST /v3/instruments/:id/index-factors
  Append one index-factor observation.

DELETE /v3/index-factors/:id
  Delete a specific index-factor by its own ID.

## Path params (collection endpoints)

  id (required) — Instrument identifier (Mongo ObjectID).

## Attributes (`type: index-factor`)

  date     (string, ISO 8601, required) — Date from which the factor applies.
  value    (number, required)            — Index factor.
  provider (string, read-only)           — "client" or "aleta".