# Data Dictionary - US Dollar Liquidity Components (Fed balance sheet, TGA, Reverse Repo) - cleaned Parquet

**Units:** vary by `series` - read the per-row `unit` column (overall: USD bn).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Always US |
| `ts` | timestamp (UTC) | Observation date |
| `series` | str | Fed balance sheet / Treasury General Account / Reverse Repo |
| `usd_bn` | float | Balance / volume, $ billions |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (weekly/daily) |

*Source: Board of Governors of the Federal Reserve System (H.4.1; retrieved via FRED).*