News, Insight and Events

29 September, 2025

Enhancing Venue Performance: How Aquis Markets Built an Analytics Solution with BMLL to Drive Growth

Aquis Markets selected BMLL to scale its analytics without building a complex in-house data system. Aquis combined its own data with BMLL harmonised market data to compute custom KPIs, benchmark members, and assess liquidity and market quality. This approach reduced cost and complexity, sped up analysis, and supported business development by enabling rapid, actionable insights.

17 September, 2025

Garbage In, Losses Out - What defines high-quality historical market data, and why it matters

In this article, Dr Elliot Banks explores what makes good quality, usable historical market data, and the key questions to ask when sourcing it.

1 September, 2025

Scaling Historical Trading Data Storage Using Amazon S3 with BMLL

Learn how financial data and insights provider BMLL is storing petabytes of historical financial data at scale on AWS.

6 August, 2025

Powering Smarter Execution: How KCx Built a Best-in-Class SOR with BMLL

KCx partnered with BMLL to accelerate the development of KCx Spark, a Smart Order Router designed to deliver best execution across fragmented European equity markets. By leveraging BMLL’s harmonised Level 3 data and scalable analytics platform, KCx rapidly moved from data exploration to live execution without the burden of internal data engineering. This collaboration laid the foundation for KCx’s broader trading technology transformation, including the future development of its next-gen platform, KCx Omni.

24 June, 2025

Into the Close: Unpacking U.S. Closing Auction Dynamics and the Impact of the Russell Reconstitution

This article examines U.S. closing auctions and their behavior during the annual Russell Reconstitution. It shows how different exchanges (NYSE, Nasdaq, NYSE Arca) and order types (like NYSE D-Orders) impact price formation, and how auction volumes and imbalances spike on rebalance day. Understanding these dynamics and historical data is key for traders managing execution and risk into the 2025 reconstitution.

21 May, 2025

Life is a beach … if your data is clean

6 things buy-side traders need to know. Historical data quality is no longer a "nice-to-have" - it is foundational to effective trading.

14 May, 2025

BMLL’s Big Data Dream: Turning Market Noise Into Market Insight, One Packet at a Time

Paul Humphrey, Chief Executive Officer, BMLL, sat down with John Lothian News at the FIA Boca50 conference. Hear the interview.

13 May, 2025

A new approach to Level 3 market data

This article is the story of how Optiver became, first, customers of BMLL’S Level 3 historical data, and then investors. It’s also the story of how companies like BMLL, with the help of Optiver, are putting the ‘buy’ into the age-old ‘build versus buy’ question when it comes to historical market data.

12 May, 2025

Optiver relies on BMLL market data for quant strategy

The market-maker has built its trading business on top of BMLL’s Level 3 data. But the collaboration is young, and the pair have grand plans to make options the next quant frontier.