# Data Dictionary - Hyperliquid Volume Concentration - HHI & top-coin share, daily Parquet

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

| column | type | description |
|---|---|---|
| `zone` | str | MARKET (whole-market aggregate) |
| `ts` | timestamp (UTC) | Day |
| `metric` | str | volume_hhi, top1_volume_share_pct, top5_volume_share_pct or active_coins |
| `value` | float | Metric value (HHI 0-10000; shares in %; active_coins a count) |
| `unit` | str | mixed - see metric |
| `res_min` | int | Native resolution (daily = 1440) |

*Source: Hyperliquid (on-chain perpetual DEX) - public asset-context data.*