Core Viewpoint - Nasdaq is planning to submit a proposal to the SEC for nearly 24-hour trading of U.S.-listed equities and exchange-traded products, aiming for implementation in the second half of 2026 [1] Trading Hours Expansion - The proposed trading hours would extend to 23 hours each weekday, from the current 16 hours, with a "day session" from 4 a.m. to 8 p.m. Eastern time, followed by a one-hour maintenance break, and a "night session" from 9 p.m. to 4 a.m. [2] Market Concerns - Critics argue that nearly nonstop trading could exacerbate existing issues in equity markets, such as thin liquidity, sharp price swings, and a more gamified trading environment [3] - Concerns have been raised about the impact on listed companies, as continuous trading could disrupt their ability to manage news releases and meetings without affecting market movements [4][5] Liquidity Issues - Wells Fargo noted that liquidity already clusters around market open and close, questioning the effectiveness of extending trading hours further [7] - The industry is facing skepticism regarding whether firms would need to staff trading desks around the clock to accommodate the extended hours [7][8] Purpose of Trading Pauses - Trading pauses are seen as beneficial for allowing markets to digest information and for participants to reset, with concerns that continuous trading could lead to increased volatility [8][9]

Core Insights - Nasdaq is set to implement a significant change by introducing 23-hour trading for U.S. stocks and ETFs, responding to the increasing demand for continuous trading access [1][2]. Trading Schedule Changes - The new trading schedule will extend from 16 to 23 hours on weekdays, featuring a day session from 4 a.m. to 8 p.m. Eastern Time, followed by a one-hour break, and a night session from 9 p.m. to 4 a.m. the next day [3][5]. - The trading week will commence on Sunday at 9 p.m. and conclude on Friday at 8 p.m. [4]. Market Context - The move is driven by the rising foreign ownership of U.S. equities, which reached $17 trillion last year [4]. - Currently, extended-hours trading operates in three sessions over 16 hours, but the new plan aims to streamline this into two longer sessions for better access for international traders [5]. Industry Trends - The push for 24-hour trading is gaining traction, with the SEC having approved the first 24-hour stock exchange over a year ago [7]. - Other broker-dealers, including Charles Schwab and Robinhood, have already adopted 24-hour trading capabilities for U.S. stocks and ETFs [7]. - Competitors like CBOE Global Markets and Intercontinental Exchange have also filed for extended trading hours with the SEC [8].