US stock exchanges to expand trading to 23 hours daily

US stock market extended trading hours night sessions market liquidity Nasdaq

Major US stock exchanges, including Nasdaq and NYSE Arca, are set to expand trading hours to approximately 23 hours a day, five days a week, starting December 6. This move aims to increase accessibility for international investors and compete with the 24/7 nature of cryptocurrency and prediction markets.

According to SEC data, night trading currently accounts for about 1% of total stock trading volume, though this segment has seen a significant 358% year-over-year increase. The new schedule will introduce a night session from 9:00 PM to 4:00 AM ET, leaving only a one-hour break for system maintenance.

While the expansion offers greater flexibility, institutional investors have expressed caution regarding market quality. Analysts note concerns that reduced participation outside regular hours could lead to lower liquidity, wider bid-ask spreads, and increased price volatility.

Entities

Amazon Web Services · Cathie Wood · Cboe EDGX · David Easthope · Dow Jones Industrial Average · Federal Reserve · HSBC · Hang Seng Index · Nasdaq · Nasdaq Composite · New York Stock Exchange · Nvidia

Claims

What the coverage asserts, and how many sources carry each claim.

[● 3 SOURCES] The Philadelphia Semiconductor Index rose 1.59% to close at 12,829.00. news.pchome.com.tw · www.peoplenews.tw
[● 2 SOURCES] The Dow Jones Industrial Average rose 20.51 points or 0.04% to 50,926.56. news.pchome.com.tw
[● 2 SOURCES] US Treasury yields declined from a 20-year high. news.pchome.com.tw
[○ 1 SOURCE] The Taiwan Weighted Index reached a record close of 48,475.74. www.peoplenews.tw
[● 2 SOURCES] TSMC ADR rose 0.66% to close at 459.2 USD. news.pchome.com.tw
[○ 1 SOURCE] NVIDIA shares increased by 1.09%.
[● 2 SOURCES] Institutional investors are concerned about market quality, specifically liquidity and bid-ask spreads, during extended hours. www.cnbce.com · news.cnyes.com
[● 2 SOURCES] Night trading accounted for approximately 1% of total stock trading volume in the second quarter. www.cnbce.com · news.cnyes.com
[● 2 SOURCES] Four major US exchanges plan to implement night sessions starting December 6. www.cnbce.com · news.cnyes.com
[● 2 SOURCES] Night trading volume increased by 358% compared to the same period last year. www.cnbce.com · news.cnyes.com
[○ 1 SOURCE] The new system will allow for a 23-hour trading day, five days a week. news.cnyes.com