# Data Dictionary - COT Speculative Positioning Divergence Index - derived Parquet

**Units:** all `z_score` values are in **z-score**.  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Market & exchange name |
| `ts` | timestamp (UTC) | Report week |
| `z_score` | float | Net-spec positioning z vs 3-yr baseline |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (weekly = 10080) |

*Source: U.S. Commodity Futures Trading Commission (CFTC).*