Nasdaq Wants 23 Hour Trading and Wall Street Might Never Sleep Again

​Nasdaq is basically asking for a night shift
Nasdaq is seeking SEC approval to stretch weekday trading to 23 hours a day. The plan would add a new overnight session running 9 p.m. to 4 a.m. ET, layered on top of the premarket, regular session, and after-hours trading it already runs. Translation: the closing bell would stop feeling like a hard stop and start feeling like a “pause button.”

The reason is simple: global investors hate waiting
Nasdaq says demand keeps rising from investors outside the US who want to trade American stocks during their own daylight hours. The pitch is access on their terms, across their time zones, without sacrificing trust or market integrity. In short: if people can trade crypto 24/7, they’re increasingly asking why Apple and Nvidia have to sleep.

This is turning into an exchange arms race
Nasdaq isn’t alone. Other venues are moving the same direction, including the New York Stock Exchange, which has plans for 22-hour weekday trading (and has already gotten an initial regulatory green light, pending data-feed updates). Everyone sees the same opportunity: more hours, more global participation, more volume — at least in theory.

But the plumbing has to stay open too
Extended trading doesn’t work if only the exchange is awake. Clearing and market data systems also need longer hours. Key market infrastructure players have been preparing for that: DTCC, which clears trades, has said it aims to clear equity trading 24 hours a day, five days a week by the second quarter of 2026. Nasdaq says it expects to be ready for longer trading early in the third quarter of 2026, assuming regulators approve and the industry aligns.

The upside: faster reactions, less “overnight surprise”
Supporters say near-continuous trading would let investors respond immediately to earnings, geopolitical shocks, or economic data — instead of waking up to a gap move and pretending they “saw it coming.” For investors in Asia and elsewhere, it could make US stocks feel more like a local market than a distant one that only trades while they’re asleep.

The downside: thin liquidity can turn small moves into chaos
Critics have a solid point: overnight hours tend to have lighter trading volume, which can mean wider spreads, shakier pricing, and bigger swings. And there’s a human factor too — less downtime to digest headlines, fewer natural “breathers” between news and price action. More hours doesn’t automatically mean better markets; sometimes it just means louder noise.

The real question: will big institutions show up after dark?
Retail traders might love the flexibility, but the ultimate stress test is institutional participation. Most trading still clusters around the open and the close, when liquidity is deepest. If institutions don’t meaningfully trade overnight, extended hours could become a choppier side-market rather than a truly efficient expansion of the main one.

Bottom line: the market is inching toward always-on
​Nasdaq’s request is another step toward a world where US stocks trade almost constantly — closer to the crypto model, but with the guardrails and infrastructure of traditional markets. If liquidity holds and the big players participate, it could reshape how global investors interact with US equities. If not, it might just create a longer, noisier day for everyone.