NEW YORK, 16 December 2025 — Wall Street’s largest banks are quietly preparing for a future in which U.S. stock trading could operate nearly around the clock, even as many remain reluctant about the operational, regulatory and cost implications of such a shift.
The push toward extended trading hours has gathered momentum following proposals by major exchanges, including Nasdaq’s plan to lengthen weekday trading to as much as 23 hours, as global investors increasingly demand continuous market access across time zones. While digital asset markets already operate on a 24/7 basis, the idea of applying a similar model to traditional equities represents a profound change to how capital markets function.
For banks that sit at the heart of market infrastructure, providing trading, clearing, settlement, financing and risk management, the transition is far from straightforward. Senior executives across Wall Street firms acknowledge that extended trading hours are becoming increasingly difficult to resist, yet many warn that enthusiasm among exchanges is not matched by readiness across the broader financial ecosystem.
At the core of banks’ concerns is market quality. Liquidity during overnight or extended sessions is expected to be thinner, potentially leading to wider bid-ask spreads, higher volatility and weaker price discovery. Banks fear that fragmenting trading across longer hours could ultimately disadvantage investors rather than improve access, especially if participation remains concentrated in a few time windows.
Operational strain is another major challenge. Near-continuous trading would require banks to staff trading desks, compliance teams, technology operations and risk management units for far longer periods, a costly proposition in an industry already grappling with margin pressure and regulatory capital demands. Clearing and settlement systems, which currently rely on overnight batch processes, would also need significant upgrades to handle a more continuous flow of transactions.
Despite these reservations, banks recognise that competitive dynamics may leave them with little choice. Global investors, particularly in Asia and Europe, increasingly expect the ability to trade U.S. stocks during their local business hours. Meanwhile, fintech platforms and alternative trading venues are rapidly innovating, raising the risk that traditional institutions could lose relevance if they fail to adapt.
Regulators are watching closely. Any move toward near-24-hour equity trading would require careful coordination with oversight bodies to ensure market resilience, investor protection and systemic stability. Stress testing systems, safeguarding against operational failures, and preventing market abuse during lower-liquidity periods are expected to be key regulatory priorities.
For now, most Wall Street banks appear resigned rather than enthusiastic. Many executives privately describe extended trading as “inevitable,” but argue that implementation must be gradual, coordinated and supported by sufficient liquidity incentives. Some suggest that futures and exchange-traded products may serve as testing grounds before full equities markets move toward near-continuous operation.
As global financial markets evolve alongside digital assets and always-on technology, the traditional boundaries of trading hours are increasingly being questioned. Whether round-the-clock stock trading ultimately enhances efficiency or introduces new risks will depend largely on how well exchanges, banks and regulators manage the transition together.
The Ledger Asia View:
The reluctance of Wall Street banks highlights a critical fault line in modern market evolution. While exchanges chase growth and global relevance through longer trading hours, banks remain guardians of stability and liquidity. The success of near-continuous equity trading will hinge not on ambition alone, but on careful sequencing, robust infrastructure and a shared commitment to market quality.
