PRESS RELEASE

BNY ConvergEx Group Deploys StreamBase for U.S. Trading Operations

StreamBase CEP Platform Provides Intelligent Monitoring, Analysis, Risk, and Routing in Real-Time

LEXINGTON, MA — October 6, 2008 — StreamBase Systems, Inc., a leading provider of complex event processing software (CEP), today announced that BNY ConvergEx Group, LLC, a leading provider of global agency brokerage and investment technology solutions, has deployed the StreamBase CEP platform for their U.S. based electronic trading operations.

The StreamBase stream processing engine provides real-time monitoring for BNY ConvergEx’s U.S. electronic trading infrastructure, which includes its dark liquidity pool VortExSM, market interaction monitoring, routing, trading operations analysis, credit risk correlation, system health monitoring and real-time analysis of market feeds for latency and response time.

“The implementation of StreamBase allows us to monitor our risk, make routing decisions, and assess the health of our entire U.S. trading operations in real-time,” said Joseph Weisbord, Managing Director, BNY ConvergEx Group.

BNY ConvergEx uses StreamBase Studio™, a graphical event flow modeling environment, to rapidly design, test, deploy, and sustain their system.  BNY ConvergEx also uses the StreamBase Event Processing engine to apply risk models and latency measurement in real-time.  The system monitors latency with multiple electronic trading venues.  If one fails to respond with expected latency, StreamBase helps BNY ConvergEx proactively address technical issues, correlate and understand risk profiles, alert trading operations staff or adjust routing decisions for trading.

“There are three primary reasons StreamBase impresses me," continued Weisbord. “First, time to market is key in financial services, and the StreamBase Studio™ environment allows us to get to market quickly with very little coding.  Second, StreamBase meets the high-performance demands of Wall Street – it can handle large amounts of data, quickly.  Finally, its multi-threaded architecture makes it very efficient – so StreamBase scales smoothly as the volumes in the market grow – it helps future-proof our trading infrastructure.”

“The breadth and depth of the BNY ConvergEx deployment of StreamBase shows that CEP is moving into broad enterprise deployment,” said Mark Palmer, CEO of StreamBase. “While many applications embed CEP-like functionality, BNY ConvergEx shows the applicability of a CEP platform beyond point algorithmic trading applications - to risk, order routing, and technology infrastructure for trading operations and dark pool execution.”

About StreamBase
StreamBase Systems, Inc, a leader in high-performance Complex Event Processing (CEP), provides software for rapidly building systems that analyze and act on real-time streaming data for instantaneous decision-making. StreamBase’s Event Processing Platform™ combines a rapid application development environment, an ultra low-latency high-throughput event server, and the broadest connectivity to real-time and historical data. Leading investment banks, hedge funds, and government agencies use StreamBase to power mission-critical applications that increase revenue, lower costs, and reduce risk. The company is headquartered in Lexington, Massachusetts. For more information, visit www.streambase.com.

About BNY ConvergEx Group
BNY ConvergEx Group, LLC provides global institutional agency brokerage and investment technology solutions to institutional clients worldwide.  The Company’s key business lines – Liquidity and Execution Management, Investment Technologies and Intermediary and Clearing Services – focus on a broad array of services designed to deliver a comprehensive, integrated platform of performance-driven, global multi-asset class trading capabilities.  BNY ConvergEx Group is comprised of the following businesses: BNY ConvergEx Execution Solutions LLC (member NYSE/FINRA/SIPC), including BNY Global Transition Management and LJR Recapture Services; LiquidPoint, LLC (member CBOE/SIPC); Eze Castle Transaction Services LLC (member FINRA/SIPC); Westminster Research Associates LLC (member FINRA/SIPC); G-Trade Services LLC (member FINRA/SIPC); BNY Jaywalk LLC; ConvergEx Global Markets Ltd. and Eze Castle Software LLC.  BNY ConvergEx Group is an affiliate of The Bank of New York Mellon Corporation.  Additional information is available at www.bnyconvergex.com.