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New research report
Execution Quality in Fragmented FX Markets
Millisecond-level order book analysis of Tokyo and London liquidity around major Japan macro events.
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Inside this report

The FX market processes trillions of dollars daily, yet reaction speed alone does not define execution quality. To understand how routing decisions affect realised cost, LMAX Group and MacroHive analysed millisecond level order book data around Japan centric macro events.

This report examines how price discovery, liquidity depth and spread behaviour differ across venues and what that means for institutional trading strategies.
1.
Reaction speed and price discovery

Millisecond change point detection and lead lag modelling show London reacting 20 to 30 milliseconds earlier than Tokyo, with statistically measurable predictive relationships.


2.
Liquidity and trade size distribution

While offshore venues lead price discovery, 100 percent of the largest trades in the top 1 percent were executed in Tokyo, highlighting differences in liquidity concentration.


3.
Spread behaviour under stress

During the February CPI release, London USD/JPY spreads widened to approximately 6.38 pips while Tokyo remained around 1.47 pips, representing a 77 percent relative difference.


4.
Execution cost implications

Based on modelled spread differentials at 1 billion dollars of daily trading volume, the implied annualised cost differential approached 92.9 million dollars.

LMAX Group ultra fast, high quality market data with global institutional coverage

LMAX Group provides millisecond resolution order book data across global FX liquidity centres. With 1,000 price updates per second and transparent exchange execution, our data supports quantitative analysis of price discovery, liquidity resilience and volatility transmission.

This research is built on genuine institutional grade transaction data, enabling detailed modelling of lead lag behaviour, spread stability and execution cost during stress conditions.

Previous reports in this series include:

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Uncovering market drivers through flow data - download

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Millisecond reactions to market shocks - download

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