A network disruption at Nasdaq’s Carteret facility caused intermittent US-equities market-data gaps on 15 October, affecting Nasdaq, Nasdaq Texas and Nasdaq PSX. Reuters later reported that the gaps had ceased, citing a person familiar with the matter, who said actual trading was unaffected.[3]
Published incident scope
| Layer | Reported position |
|---|---|
| Location | Carteret, New Jersey |
| Affected delivery | Multiple multicast groups |
| Feed redundancy | Primary A and secondary B feeds affected |
| Feed types | Hardware and software feeds |
| Fallback | Chicago-origin backup feeds |
| Trading status | Reported as continuing |
Nasdaq advised clients to switch to unaffected Chicago feeds and submit recovery requests for missing data. A backup route can restore current information, but firms may still need historical recovery to complete surveillance, pricing and reconciliation records.[3]
Feed recovery and trading continuity
An exchange can continue accepting and matching orders while a subset of downstream users receives incomplete quotes or trades. That creates a different operational risk from a trading halt: execution may occur, but some participants’ models and monitoring tools may lack the full information set.[1]
Reuters’ source described a routine network problem rather than failure of the core internal systems. The distinction separates the reported feed-distribution incident from a halt in matching trades.[3]
For brokers, resilience planning should therefore cover both execution connections and market-data recovery. Dual feeds are useful only when the backup is genuinely independent of the failed path and failover procedures are tested.[2]
Sources & further reading
- Nasdaq reports network disruption affecting US equities data feeds Reuters · 15 Oct 2026 · Accessed 22 Oct 2026
- Nasdaq network disruption caused intermittent data gaps Yahoo Finance · 16 Oct 2026 · Accessed 22 Oct 2026
- Nasdaq resolves network disruption causing data gaps Reuters via Investing.com · Accessed 30 Oct 2026