Corvil Achieves Industry-First With Latency Monitoring for New Millennium Exchange From The London Stock Exchange Group

LSEG Market Participants can Migrate to the Millennium Exchange With Full Latency Visibility of Order Flow and Market Data Quality Using Corvil

LONDON, February 17, 2011 - Corvil, a provider of latency management systems for high performance
trading and market data, today announced availability of full latency
monitoring of order flow and quality analysis of market data for Millennium
Exchange that went live on February 14th from the London Stock Exchange
Group.

Millennium Exchange is the London Stock Exchange's new trading and
information platform, which builds on the expertise brought into the group by
the acquisition of Millennium IT in October 2009. The goal of the London
Stock Exchange Group is to provide its participants with one of the fastest,
most reliable and technologically advanced markets in the world. With this
new functionality, market participants who have deployed CorvilNet can
monitor continuously:

    - Latency of LSE Millennium Native and FIX Trading Interfaces -
      participants can track the order response time for all order types
      including New Orders, Quotes, Modifys and Cancels and the associated
      acknowledgements and / or reject messages

    - Quality of LSE Millennium ITCH And FIX-FAST Market Data - participants
      can use gap detection and microburst analysis to assess the quality and
      traffic profile of the feeds. The presence of gaps and/or microbursts
      can often cause latency issues if they are not handled properly

    - Latency of LSE Millennium Order to Market Data Update - participants
      can track "trade to tick" latency which reflects how fast the exchange
      can process an order and reflect the order on the market data feed e.g.
      Add Order to ITCH update

    - Relative Latency For A versus B Feeds - tells participants the relative
      latency between updates on the A and B versions of the market data
      feeds

"Many of our market participant customers are in the process of migrating
to the new Millennium Exchange. This new functionality will allow
participants to minimize migration risk and enable them to validate the speed
and performance improvements promised for LSE's new trading platform," said
Donal Byrne, CEO of Corvil.

Corvil

Corvil is a provider of Unified Latency Management systems to the world's
leading trading organizations including global banks, exchanges, electronic
market makers and services providers to financial markets. The company was
founded in 2000 and operates from New York, London and Dublin. Customers use
Corvil for precision monitoring, troubleshooting and reporting of performance
for their trading applications and networks. In addition, Corvil's products
are used to demonstrate latency compliance and transparency of services such
as co-location, direct feeds and Direct Market Access (DMA) offered to
trading clients. For more information on Corvil, please visit
www.corvil.com

Collette Bird, E-mail: collette.bird at corvil.com, +353-1-859-1040