The traditional closing bell is steadily losing its significance. This week, London Stock Exchange Group unveiled plans for LSE 24, a venue designed to facilitate almost round-the-clock weekday trading. Subject to regulatory approval, testing is expected to begin later this year, with the first exchange-traded products available in early 2027. Similar initiatives are already under way in the US, where Nasdaq and NYSE Arca are pursuing extended trading hours. <\/p>\n
The rationale is straightforward. Financial markets are increasingly global, while news travels instantaneously. Investors in Europe, Asia and the Americas no longer want to wait for local exchanges to open before responding to earnings announcements, geopolitical events or macroeconomic developments. Longer trading sessions promise greater flexibility and broader market access. <\/p>\n
Whether they deliver better outcomes for investors is a more complicated question. <\/p>\n
What do extended hours mean for traders? <\/p>\n
Extended trading hours expand the window in which assets can change hands, but they do not guarantee the depth of participation that characterises core market sessions. Liquidity typically falls outside normal trading hours, meaning fewer buyers and sellers are available to absorb orders. <\/p>\n
The result can be wider bid-offer spreads, more volatile price movements and a greater likelihood that investors transact at prices that do not accurately reflect underlying value. <\/p>\n
This distinction between price and value becomes particularly important during overnight sessions. A sharp move in a share price may attract attention, but it does not necessarily indicate that investors have fundamentally reassessed a company’s prospects. Limited trading activity can allow relatively small orders to move prices disproportionately, creating the appearance of a significant market reaction where conviction remains thin. <\/p>\n
What should investors do? <\/p>\n
Investors should therefore distinguish between developments that genuinely alter a company’s long-term outlook and those that merely generate short-term volatility. A profit warning, regulatory intervention or major acquisition may justify a lasting repricing. By contrast, political headlines, movements in overseas futures markets<\/a> or temporary shifts in market sentiment often produce price swings that moderate once liquidity returns during regular trading hours. <\/p>\n The expansion of trading hours may also introduce new market complexities. As activity becomes spread across more venues and longer sessions, price discovery could become increasingly fragmented. Some exchanges have indicated that certain features common during core trading hours, such as opening auctions or volatility controls, may not apply in extended sessions, potentially creating different trading dynamics for investors operating overnight. <\/p>\n Could 24 hour trading impact investment returns? <\/p>\n Beyond market structure lies a behavioural challenge. Greater accessibility can encourage greater activity, but more trading does not necessarily translate into stronger long-term investment returns. The ability to react immediately to every headline risks reinforcing short-term decision-making at the expense of disciplined portfolio management. <\/p>\n For investors choosing to trade outside traditional market hours, execution becomes increasingly important. Limit orders can help reduce the risk of accepting unfavourable prices in illiquid conditions, while checking trading volumes and bid-offer spreads can provide valuable context before acting on overnight price moves. <\/p>\n Most importantly, investment decisions should remain anchored in changes to a company’s underlying fundamentals rather than short-lived market noise. <\/p>\n Longer trading hours are a logical evolution for increasingly interconnected capital markets and may improve access for global investors. But while exchanges may soon operate for almost 24 hours a day, the principles of successful investing remain unchanged. Markets may never sleep, but patient investors still have little reason to respond to every movement on the screen. <\/p>\n Key takeaways <\/p>\n Longer trading hours improve access, not liquidity: Near-24-hour trading offers greater flexibility for global investors but may result in wider spreads and more volatile pricing outside core market hours. <\/p>\n Not every overnight move reflects fundamental value: Thin trading conditions can exaggerate price movements, making it important to distinguish between genuine company news and temporary market noise. <\/p>\n Discipline remains more valuable than constant availability: Extended market hours reward investors who focus on fundamentals, use limit orders and avoid reacting impulsively to every headline. <\/p>\n