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

The difference between good execution and best execution.

A category of trades that has seen increased discussion due to its growing market share is ‘Off-Book On-Exchange’ trades. These are OTC trades that are executed away from an order book, but are reported to an exchange and traded under exchange rules.

An important question is – what proportion of this liquidity is accessible to any market participant?

This article examines the magnitude and character of the market’s response to Trump’s tariffs – through trading volumes, message traffic and options activity.

Historical data quality is no longer a ‘nice-to-have’ – its foundational to effective trading. Buy-side firms that invest in clean, consistent and complete data infrastructure today will be positioned to adapt and thrive in the markets of tomorrow.

This article sets out 6 considerations for buy-side traders.

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.