# Data Dictionary - US House Prices (FHFA HPI) - national, states & 400+ metros, 3 index flavors, cleaned Parquet

**Units:** vary by `measure` - read the per-row `unit` column (overall: index (base=100)).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | US / Census division / 2-letter state / metro name / Puerto Rico |
| `ts` | timestamp (UTC) | First of the period (national purchase-only monthly, else quarterly) |
| `measure` | str | «Flavor» HPI (SA/NSA) - Purchase-only / All-transactions / Expanded-data |
| `value` | float | House price index level (base=100) |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (43200 monthly / 129600 quarterly) |

*Source: U.S. Federal Housing Finance Agency (FHFA).*