Interactive Brokers' Stock and Options Execution Statistics Outperform Industry

Based on independent measurements, the Transaction Auditing Group, Inc., (TAG), a third-party provider of transaction analysis, determined that Interactive Broker's stock executions were forty-seven cents per one hundred shares better than the industry as a whole during the first half of 2008. This is an improvement from 2007 when IB stock executions were thirty-five cents per one hundred shares better than the industry. Unlike other industry touted statistics that highlight the percent of orders improved but don't consider the dollar amount of the improvement, TAG's statistics factor in the amount of the improvement, including executions which had dis-improvement and no improvement. The analysis included all market orders of size less than 10,000 shares.

TAG has also determined that Interactive Brokers US option executions were improved by one dollar and nineteen cents per contract during the first half of 2008, fifty-three cents better than the rest of the industry. During 2007, IB option executions were fifty-seven cents better than the industry. The analysis included all market orders in options with order sizes of one to fifty contracts.

"Our singled minded focus on building SmartRoutingSM technology, lowering commissions, and creating trading tools that give our professional customers a competitive edge in the markets helps to explain why traders who want to minimize their trading costs choose Interactive Brokers" said Steve Sanders, Interactive Brokers SVP of Marketing and Product Development.

Those interested in finding out more about Interactive Brokers' SmartRoutingSM technology, ultra low commissions, and market-maker designed trading tools should visit www.interactivebrokers.com.

About Interactive Brokers

Interactive Brokers Group, Inc. (IBG), together with its subsidiaries, is an automated global electronic market maker and broker specializing in routing orders and executing and processing trades. The company provides professional traders and investors with direct market access to stocks, options, futures, forex, bonds and funds from a single IB Universal AccountSM on over 70 market centers worldwide. Employing proprietary software on electronic exchanges worldwide, Interactive Brokers is continuously integrating its software with a growing number of exchanges and trading venues into one automatically functioning, computerized platform that requires minimal human intervention. With $4 billion in equity capital, IBG is the largest independent US broker/dealer.

Interactive Brokers LLC is a member of NYSE/FINRA/SIPC. Supporting documentation for any claims and statistical information will be provided upon request.

About TAG

Since 1996, TAG has been the leader in independent Best Execution analysis throughout the US and now, Europe. Its products offer comprehensive assessment of execution quality for equities and options, utilizing massive real time market data and archival capabilities with proprietary measurement tools to create standardized and custom reports. TAG provides business intelligence to gain market share, differentiate from competitors, and validate performance. For more information visit www.tagaudit.com.

The Transaction Auditing Group, Inc. (TAG), an independent company, is not affiliated with Interactive Brokers. The statistics provided by TAG are from sources believed to be reliable, but TAG makes no representation as to the completeness or fitness for any particular purpose. Information produced by TAG is copyrighted and any unauthorized use, duplication, redistribution or disclosure is prohibited.

CONTACT: Interactive Brokers Group, Inc.
Andrew Wilkinson, (203) 913-1369
awilkinson@interactivebrokers.com