Margin changes, last 7 days
Every tracked contract whose exchange margin changed in the last 7 days, newest first.
Margins as of How we source this
| Changed | Contract | Initial: old → new | Change | Maintenance: old → new |
|---|---|---|---|---|
| 23 Oct 2026 | Z FTSE 100 Index Future | £5,210 → £5,201 | -0.2% | £5,210 → £5,201 |
Changes are detected by comparing each day's published margins with the previous day's and are logged permanently in the repository (data/margins_history.jsonl). Where a clearing house publishes its own previous value and effective date (ICE), that date is used. A change on a CME product can also reflect the front contract rolling to the next month, since margins differ by contract month.