Interactive Brokers Group Announces Record 2008 Results

Interactive Brokers Group, Inc. (NASDAQ GS: IBKR) an automated global electronic market maker and broker, today reported diluted earnings per share of $2.24 for the year ended December 31, 2008, compared to pro forma diluted earnings per share of $1.59 in 2007.

Net revenues were $1,850 million and income before income taxes and minority interest was $1,250 million for the year, compared to net revenues of $1,468 million and income before income taxes of $932 million in 2007.

Business Highlights

• Diluted earnings per share grew by 41% from the prior year.
• 68% pre-tax margin for 2008 and 63% pre-tax margin for this quarter.
• Market Making pre-tax income increased 43% from the prior year.
• 76% Market Making pre-tax margin for 2008.
• Electronic Brokerage pre-tax income increased 13% from the prior year.
• 44% Electronic Brokerage pre-tax margin for 2008.
• Cleared DARTs grew by 46% to 316,000 in 2008.

"2008 was a record year, for the first time our profits have exceeded the billion Dollar mark," said Thomas Peterffy, our CEO. "It is not easy to report record profits in a year that has been generally difficult for our industry.

Our focus on long term growth, controlling risk and building technology continues to pay dividends, year after year. Our shareholders’ equity of $4.4 billion makes us the largest among those firms that did not receive government support in the industry and it provides us with a solid footing to keep building our business."

Segment Overview

Market Making

Market Making segment income before income taxes increased 43% in 2008. Pre-tax margin expanded to 76% in 2008 from 70% in 2007. High market volumes and volatility again demonstrated the benefits of our automated trading system and integrated real time risk management. We avoided counterparty risks and balance sheet exposure from illiquid positions by making markets only in exchange traded products that are cleared through central clearing houses. Market Making options contract volume increased by 21% and futures volume increased by 48% in 2008.

Electronic Brokerage

Electronic Brokerage segment income before income taxes grew 13% in 2008. This growth was driven by robust customer trading and a greater number of customer accounts which generated 38% higher revenues from commissions and execution fees in 2008. Net interest income declined 9% due to lower benchmark rates. Pre-tax margin was 44% for 2008. Our real-time margining system worked efficiently during the periods of severe market stress, allowing us to avoid most of the losses associated with large adverse price moves. Total DARTs* for cleared and execution-only customers increased 35% to 357,000 in 2008, compared to 265,000 during 2007. Cleared DARTs increased by 46% to 316,000 in 2008.

*Daily average revenue trades (DARTs) are based on customer orders.

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Conference Call Information:

Interactive Brokers Group will hold a conference call with investors today, January 22, 2009, at 4:30 p.m. ET to discuss its 2008 results. Investors who would like to listen to the conference call live should dial 800-390-5360 (U.S. domestic) and 719-785-1753 (international). The number should be dialed approximately ten minutes prior to the start of the conference call. Ask for the "Interactive Brokers Conference Call.”

The conference call will also be accessible simultaneously, and through replays, as an audio webcast through the Investor Relations section of the Interactive Brokers web site, www.interactivebrokers.com/ir.

About Interactive Brokers Group, Inc.:

Interactive Brokers Group is an automated global electronic market maker and broker specializing in routing orders and executing and processing trades in securities, futures and foreign exchange instruments on more than 70 electronic exchanges and trading venues around the world. As a market maker, we provide liquidity at these marketplaces and, as a broker, we provide professional traders and investors with direct access to stocks, options, futures, forex, bonds and mutual funds from a single IB Universal Account^SM. Employing proprietary software on a global communications network, Interactive Brokers Group continuously integrates its software with a growing number of exchanges and trading venues into one automatically functioning, computerized platform that requires minimal human intervention.

Cautionary Note Regarding Forward-Looking Statements:

The foregoing information contains certain forward-looking statements that reflect the company's current views with respect to certain current and future events and financial performance. These forward-looking statements are and will be, as the case may be, subject to many risks, uncertainties and factors relating to the company's operations and business environment which may cause the company's actual results to be materially different from any future results, expressed or implied, in these forward-looking statements. Any forward-looking statements in this release are based upon information available to the company on the date of this release. The company does not undertake to publicly update or revise its forward-looking statements even if experience or future changes make it clear that any statements expressed or implied therein will not be realized. Additional information on risk factors that could potentially affect the company's financial results may be found in the company's filings with the Securities and Exchange Commission.