Nasdaq has filed a first-day opening safeguard for newly listed exchange-traded products ahead of its planned 6 December overnight-trading launch. ETPs outside the optional Initial ETP Open process will halt at 9 p.m. Eastern and resume through the Nasdaq Halt Cross no earlier than 4 a.m. Nasdaq generally expects a 9 a.m. cross for this group.[1][4]
The rule prevents a new ETP from simply beginning to trade at 9 p.m. when overnight liquidity and price discovery may be limited. Under Nasdaq’s current schedule, a new ETP normally becomes tradable when pre-market begins at 4 a.m. The 23/5 structure moves the formal trading day back to 9 p.m. on the previous evening, so the halt preserves an organised first-price process instead of treating the Night Session as an automatic opening.[1][2]
Opening routes for a newly listed ETP
Opening treatment for a newly listed Nasdaq ETP
| Path | Earliest or expected opening | Mechanism |
|---|---|---|
| Standard ETP under 23/5 rule | No earlier than 4 a.m.; Nasdaq generally expects 9 a.m. | Halted at 9 p.m. and opened through the Nasdaq Halt CrossSource 1 |
| Issuer elects Initial ETP Open | Typically 9:40-9:45 a.m. | Existing optional Initial ETP Open and Halt Cross processSource 1 |
| Current pre-23/5 standard | 4 a.m. | Systematic pre-market opening without the new Night Session haltSource 1 |
| Night Session after the first day | 9 p.m.-4 a.m., subject to ordinary rules and halts | Normal 23/5 trading once the product has completed its initial openingSource 1Source 3 |
For brokers, the rule affects order state and client messaging. An order accepted before the first Nasdaq cross may be queued or rejected according to the broker’s controls, but a displayed “overnight market” price should not imply that the new ETP has opened. Systems need the halt code, cross status and first eligible session rather than relying only on the symbol’s listing date.[1][4]
Nasdaq says its 23/5 launch is expected on Sunday, 6 December 2026, subject to SIP readiness and applicable rule changes. The Night Session will use a separate matching engine, and orders remaining open at 4 a.m. will be cancelled for re-entry into the following session under the current implementation notice. The ETP rule is therefore one component of a wider session-boundary design.[3][4]
Sources & further reading
- SR-NASDAQ-2026-088: newly listed ETPs in 23/5 trading U.S. Securities and Exchange Commission · 13 Oct 2026 · Accessed 30 Oct 2026
- Nasdaq explains 23/5 trading Nasdaq · 23 Oct 2026 · Accessed 30 Oct 2026
- Nasdaq 23/5 Trading Information Hub Nasdaq · Accessed 30 Oct 2026
- Nasdaq Stock Market new trading hours alert Nasdaq Trader · 26 Aug 2026 · Accessed 30 Oct 2026