About a-team Marketing Services
The knowledge platform for the financial technology industry
The knowledge platform for the financial technology industry

A-Team Insight Blogs

Proving Best Execution Depends On Collecting More Data

Subscribe to our newsletter

The best way to accomplish all the aspects of ensuring best execution of trades in a manner compliant with Europe’s MiFID II regulation taking effect next year is by gathering all data, market history and relevant information in one place, says Dermot Harriss, senior vice president at OneMarketData, who spoke in a January 26 webinar, “MiFID II: Data for best execution,” hosted by A-Team Group and sponsored by OneMarketData and Thomson Reuters.

“Then, it’s mapping the data into an accessible database structure which you can use to answer the various questions that the transparency regulations ask of your data,” says Harriss.

Collecting all the information and data into one place can be complicated by multiple reporting, monitoring and control requirements that are part of best execution, observes John Mason, global head, regulatory and market structure propositions, in the financial and risk division of Thomson Reuters.

“The breadth and depth of data that’s required that goes into some of the best execution reports, and where that data is going to come from, particularly when we start looking at the more illiquid assets, means asking if proxies are required to ensure that an adequate benchmark was used to prove best execution,” says Mason.

A promising development for best execution support is that front offices and back offices are starting to find common ground on monitoring trade execution quality, according to Harriss. “They realize particularly that what they’re monitoring on a trading desk is the same as what they will be reporting and are beginning to think of those things as being coherent and not necessarily separate activities,” he says.

Having more venues available in a trading operations infrastructure or feeding into a trade data repository, so data ends up in one place with consistency, boosts the ability of the firm with that infrastructure to prove best execution, according to Mason.

“What makes best execution as we see it, is that you need to be able to prove the quality of your execution in the context of the broader market,” he says. “Making sure you have access to all that venue information, not just from a trading perspective but for the perspective it gives of the market as a whole and execution as a whole. We see this as critical for organizations being able to prove the quality of execution they’ve given their clients.

Subscribe to our newsletter

Related content

WEBINAR

Recorded Webinar: The Role of Data Fabric and Data Mesh in Modern Trading Infrastructures

The demands on trading infrastructure are intensifying. Increasing data volumes, the necessity for real-time processing, and stringent regulatory requirements are exposing the limitations of legacy data architectures. In response, firms are re-evaluating their data strategies to improve agility, scalability, and governance. Two architectural models central to this conversation are Data Fabric and Data Mesh. This...

BLOG

The Great Convergence: How AI, Data, and Open Platforms Are Redefining the O/EMS

For decades, the Order Management System (OMS) and the Execution Management System (EMS) occupied distinct roles within the trading process; the OMS handling the full order lifecycle, from creation to post-trade processing and compliance, and the EMS managing real-time order execution, routing, and optimisation across markets and venues. Today, a powerful convergence is reshaping this...

EVENT

ExchangeTech Summit London

A-Team Group, organisers of the TradingTech Summits, are pleased to announce the inaugural ExchangeTech Summit London on May 14th 2026. This dedicated forum brings together operators of exchanges, alternative execution venues and digital asset platforms with the ecosystem of vendors driving the future of matching engines, surveillance and market access.

GUIDE

The DORA Implementation Playbook: A Practitioner’s Guide to Demonstrating Resilience Beyond the Deadline

The Digital Operational Resilience Act (DORA) has fundamentally reshaped the European Union’s financial regulatory landscape, with its full application beginning on January 17, 2025. This regulation goes beyond traditional risk management, explicitly acknowledging that digital incidents can threaten the stability of the entire financial system. As the deadline has passed, the focus is now shifting...