Nexa Technologies, Inc. Debuts New Trading Platform

InfoReach, Inc. Provides Nexa Technologies with Addition to its Trading Technology Product Line

Washington, DC, June 19, 2006 — Nexa Technologies, Inc. (www.nexatech.com), a leading provider of advanced trading solutions and wholly-owned subsidiary of Penson Worldwide, Inc. (NASDAQ: PNSN), today announced the launch of Aspect TMS, its new ASP-based Direct Market Access (DMA) trading platform.

Aspect TMS, powered by InfoReach, is an ASP-based trade management system that combines advanced order entry, rule-based trading, order management and FIX connectivity for equities, options, futures, and FOREX in a single broker-neutral trading platform. Fully customizable, Aspect TMS gives institutional traders broad flexibility to configure the platform to suit their particular trading styles and methodologies. The platform has features to suit buy-side and sell-side users and an API for the implementation of additional tools.

Aspect TMS will augment Nexa's suite of online brokerage and trading solutions, which currently includes direct access trading applications, back-office account management systems, real-time and historical market data, and FIX execution services. Nexa's product line, which spans the complete client life-cycle from individual traders to professional money managers, ranges from browser-based trading applications to robust Level II DMA platforms. Aspect TMS represents a strong addition to Nexa's line of products for institutional traders.

"Adding this powerful platform to our already expansive product suite will give Nexa access to a new market segment; the vast marketplace of institutional traders who need such functionality as automated and algorithmic trading, order routing, trading multiple asset classes as single instruments or baskets, pre- and post-trade analytics, and real-time position management," said Eric Stoop, President, Nexa Technologies.

The strategic partnership with InfoReach, Inc., a financial securities trading technology firm, was developed through Nexa Technologies' affiliate, Penson Financial Services, Inc. Through the arrangement, Nexa will also provide InfoReach with additional exchange connectivity through Nexa's FastPath FIX Gateway.

"We are very excited to enter into this alliance with Nexa and Penson Financial," said Allen Zaydlin, President of InfoReach, Inc. "Through this relationship, we are able to expand the reach of our trade management system within buy- and sell-side firms."

Nexa will be an exhibitor at the SIA Technology Management Conference in booth #3200; InfoReach will be in booth #1752; Penson Financial Services, Inc. will exhibit in booth #3201. The conference runs June 20-22 in New York City.

About Nexa Technologies, Inc.

Nexa Technologies, Inc., is a provider of online and direct access trading solutions. Founded in 1999, Nexa Technologies is a subsidiary of Penson Worldwide, Inc. Its comprehensive product set incorporates multi-asset direct access trading systems, FIX-compliant order routing, comprehensive data and market access to European & North American equity, options and derivatives exchanges and ECNs.

Nexa Technologies added historical intraday time series data into its product range in January 2005 when Penson Worldwide acquired Tick Data, Inc. The Tick Data division, which provides clean, reliable historical intraday time series data for the equities and futures markets, employs proprietary compression algorithms, price-filtering techniques, and ticker symbol mapping processes to produce complete, research-ready historical data. From efficient data collection and distribution to seamless integration with third-party analytical software, the Tick Data division removes the frustration from building and maintaining historical databases.

About InfoReach, Inc.

InfoReach is an innovative company focused on providing leading software solutions for the electronic trading of financial securities.

Established in 1995, InfoReach promptly recognized industry technology trends and created its product line of InfoReach FIX Engine (FIX protocol engine) and InfoReach TMS (Trade Management System). Its products are open, scalable and flexible solutions for enterprise-wide order execution and management.

An abundant array of features, combined with committed support, has made InfoReach the technology of choice for many major buy- and sell-side financial institutions. InfoReach employs a staff of over 30 industry professionals in offices throughout the United States and Europe.

About Penson Financial Services, Inc.

Penson Financial Services, Inc., headquartered in Dallas, Texas, has served the clearing needs of all types of broker/dealers since 1995 and is a member of the NASD, Inc., NASDAQ, the Chicago Stock Exchange, the Chicago Board Options Exchange, OneChicago, the International Securities Exchange, NYSE ARCA, the Options Clearing Corp, the MSRB, NSCC, ISMA, DTC, Euroclear, SIPC, the Philadelphia Stock Exchange and is a participant of the Boston Options Exchange (BOX).

Launched two years ago, Pipeline's ATS allows users to anonymously trade large blocks of NYSE and NASDAQ stocks, as well as Exchange Traded Funds (ETFs), in single transactions. The service further enhances the InfoReach TMS Suite, which integrates buy- and sell-side functionality for manual and algorithmic basket trading of equities, futures, options and FX in a broker-neutral platform.

Block trade capability was the logical next step for InfoReach TMS, said InfoReach president Allen Zaydlin. "It augments traditional slice-and-dice approach of common execution algorithms with ability to algorithmically trade reserve quantities as blocks." said Zaydlin. "The integration of Pipeline ATS into InfoReach TMS gives our clients more choices on how they can work large orders" 

Forward-Looking Statements

Statements contained in this news release that are not based on current or historical fact are forward-looking in nature. Such forward-looking statements are based on current plans, estimates and expectations. Forward-looking statements are based on known and unknown risks, assumptions, uncertainties and other factors. Penson's actual results, performance, or achievements may differ materially from any future results, performance, or achievements expressed or implied by such forward-looking statements. Penson undertakes no obligation to publicly update or revise any forward-looking statement.

Editorial Contacts:

Intermarket Communications
Patrick Kilhaney, 212-754-5479