The 24/7-ish market dream gets a little less sci-fi
Wall Street’s two biggest names, Nasdaq and the New York Stock Exchange, are reportedly planning to expand trading hours in December. Translation: the stock market is inching closer to the always-on world of crypto and online shopping, where the “closed” sign starts to look a little outdated.
Why investors should care
More trading hours sounds great if you’ve ever been stuck watching your portfolio get ambushed by a premarket headline. But there’s a reason the market used to clock out: overnight sessions can be sleepy, illiquid, and a little chaotic.
That means:
- wider bid-ask spreads
- bigger price swings on lighter volume
- more room for retail traders to get a worse fill than they expected
Convenience, meet risk
For long-only investors, this could be a mixed bag. On one hand, more hours means more flexibility to react to earnings, macro data, or an overnight tariff tweet without waiting until the opening bell. On the other hand, if the crowd is smaller, prices can get weird fast — kind of like trying to order pizza at 2 a.m. and realizing the kitchen is running on one tired employee and vibes.
Big picture
If the exchanges pull this off, the U.S. market keeps drifting toward a more global, near-constant trading cycle. That’s convenient. It’s also a reminder that just because you can trade at night doesn’t mean you should always do it.