# Mortgage 1 interest structure

Indicates the interest structure (e.g. adjustable, fixed, variable, balloon) of an individual's first mortgage.

- API name: `mortgage_1_interest_structure`
- Category: Financial
- Type · unit: Text
- Addresses with a value: 51.5M (43.0%)
- Latest collection: Oct 1, 2026, refreshed monthly
- How values combine: Uses the first available of up to 2 source fields.
- Derivations:
  - Modeled — the attribute is calculated using an algorithm that takes known records as input.
  - Unspecified

## Links

- [Catalog page](/catalog/v2/mortgage_1_interest_structure)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/mortgage_1_interest_structure.json)
- [API reference](/docs/reference/getattribute)