Four MIAX options exchanges declared self-help on NYSE American Options at 10:19 am US Eastern on 23 October 2026. MIAX’s alert, published two minutes later, said its own systems were operating normally.[1]
The documented incident perimeter
| Item | Published detail |
|---|---|
| Venue being bypassed | NYSE American Options |
| MIAX venues | MIAX Options, MIAX Pearl Options, MIAX Emerald Options and MIAX Sapphire Options |
| Self-help effective time | 23 October, 10:19 am ET |
| Alert publication | 23 October, 10:21 am ET |
| MIAX internal systems | Reported normal in that alert |
Self-help allows a venue to disregard quotations from an exchange experiencing problems under the applicable intermarket arrangements. It is a routing response to the affected venue, not a statement that every US options exchange has halted.[1][2]
A subsequent UMX customer notice described a technical issue affecting certain NYSE American options and abnormal quotations, with other exchanges temporarily disregarding those quotes. That notice explains the broker-facing consequence; it does not quantify market-wide losses or establish that all symbols were affected.[2]
The incident notices do not state a final restoration time. They document the 23 October disruption and routing response, without establishing that NYSE American remained impaired on 26 October.[1][2]
Sources & further reading
- MIAX Exchange Group declares self-help on NYSE American Options MIAX · 23 Oct 2026 · Accessed 26 Oct 2026
- Notice of technical issue in the US equity options market UMX Service · 24 Oct 2026 · Accessed 26 Oct 2026