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New research from LMAX Group and Macro Hive reveals a split in FX market dynamics between London and Tokyo. London leads global FX price discovery by milliseconds, reacting 20-100 milliseconds faster than Tokyo during Japan-focused events like the Bank of Japan rate hike in July 2024 and the February 2025 Japan CPI release. However, Tokyo provides deeper liquidity and executes larger trades during these events, handling 88% of outlier trades and 100% of the largest transactions. This duality means traders should prioritize London for price signals but route large orders to Tokyo to access tighter spreads and lower execution costs. During the February 2025 CPI release, Tokyo's USD/JPY spreads remained 77% tighter than London's, highlighting its efficiency in volatile conditions. This study has significant implications for brokers, liquidity providers, and institutional traders. London's speed makes it ideal for capturing initial price movements, while Tokyo's depth is critical for executing large blocks without slippage. The findings align with prior research showing most price action in major FX pairs occurs within the first few seconds of news releases. Traders leveraging millisecond-level data can capture nearly all market movements, but must now balance speed with liquidity depth depending on regional events. For global markets, this dynamic underscores the importance of venue selection based on trade type and event focus. As Japan remains a key driver of FX volatility, traders should monitor BoJ policy shifts and economic data releases. The split between London and Tokyo also raises questions about how other regional hubs like Singapore or Hong Kong might integrate into this framework in the future.
