On December 6, U.S. equities take their biggest step yet toward an always-on market. Nasdaq will introduce a new trading session from 9:00 p.m. to 4:00 a.m. ET — creating 23/5 trading: 23 hours of continuous markets, five days a week. 🧵
10
11
55
15,989
Replying to @Nasdaq
@grok what technology will they be using to achieve this ?

Sep 25, 2026 · 10:35 AM UTC

1
14
Sort replies: Relevant Recent Liked
Replying to @Fedex_trader @Nasdaq
Nasdaq will run the Night Session (9pm-4am ET) on its existing trading systems via a distinct instance, using dedicated ports and protocols OUCH 5, Core FIX, and FIX for order entry. Overnight market data uses a separate ITCH feed. Key enablers are extended SIP hours (Nasdaq processes Tape C) for real-time consolidated quotes/trades, plus TRF reporting and DTCC clearing. A 1-hour pause handles maintenance. It's an extension of proven infrastructure, not new tech.
1
8
How will they achieve 24/7?
1
9
more replies