Japanese investors prepare for 23-hour US stock trading

· Finance · Japan · United States

Japanese investors are gearing up for 23-hour trading in US stocks, as the extended sessions reshape how they access American equity markets. The shift matters for a large base of retail and institutional investors in Japan who have relied on limited local-hours access to US shares, and for brokers and asset managers building out overnight coverage and execution. It also reflects a broader push by US venues and platforms to capture foreign order flow around the clock, and raises questions about liquidity, pricing and settlement during hours when the US market itself is closed. Market participants are adjusting operations and systems accordingly.

Why it matters：Around-the-clock US equity trading stretches operations across time zones and could shift global order flow toward venues that offer it, challenging local brokers' role.

Key points

  • Japanese investors are preparing for US stocks to trade 23 hours a day.
  • The change affects retail and institutional access to US equities.
  • Brokers are adjusting overnight execution and coverage.

Sources (original reporting)

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