The Options Clearing Corporation Receives Approval for New Risk Management Methodology

Better Risk Modeling Will Enable More Precise Margin Calculations

CHICAGO, The Options Clearing Corporation (OCC)
announced today that it has received approval from the Securities and Exchange
Commission (SEC) to implement a new risk management methodology for
determining the amount of margin deposits required of OCC Clearing Members.

OCC Background
OCC, founded in 1973, is the world's largest derivatives clearing
organization and was the first clearinghouse to receive a 'AAA' credit rating
from Standard + Poor's Corporation.com .S.
IBG total assets rose to $14. A designated
contract market (DCM) and a registered derivatives clearing
organization (DCO), HedgeStreet is regulated by the Commodity Futures
Trading Commission (CFTC) and monitored by the National Futures
Association (NFA).

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"The big thing for us now is foreign exchange and fixed income.
In March, IBG was ranked the Number-One software-based broker-dealer in
Barron's 2005 annual review of online brokerage firms.

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For more information, visit www.

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In addition to the base simulation, STANS generates complementary sets of
scenarios intended to measure increased portfolio risk given atypical market
conditions.0 rating in the eight categories reviewed by
Barron's for both software-based and browser-based brokerage rankings.com

About The Clearing Corporation

The Clearing Corporation is a stockholder-owned, Delaware
corporation now in its 80th year of business.

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optionsclearing. broker-dealer serving a diversified customer base around the world. We anticipate that institutional traders, hedge funds and
others will take advantage of the arrangement with CCorp.

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Scenarios are generated for over 7,000 risk factors , including a
broad range of individual equities, exchange traded funds, stock indices,
currencies and commodity products. More
information about OCC is available through its Web site at
http: //www. This
means that any individual or institution that has a relationship with
a CCorp clearing participant can trade on HedgeStreet and clear
through CCorp, thus dramatically opening up the marketplace .com

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S.
No other broker achieved a 5.

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OCC will be the first derivatives clearinghouse in the world to use a
large-scale Monte Carlo-based risk management methodology.
Using Monte Carlo-based simulation techniques, STANS generates a set of
10,000 hypothetical market scenarios intended to provide a realistic
evaluation of risk at the portfolio level.

Interactive Brokers Group Among Fastest-Growing U.S. Broker-Dealers in Institutional Investor Ranking

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, Interactive Brokers Group (IBG)
vaulted four spots to become the 16th largest U.
"We continue to grow our customer business by making available to various
segments of the buy-side the proprietary trading technology and tools that
have allowed us to achieve best-execution for three decades," said IBG founder
and Chairman Thomas Peterffy.77 billion in the 2005 ranking from $10.com, the nation's first online market that lets
investors trade innovative financial instruments based on economic
events, and The Clearing Corporation ("CCorp") announced today they
have entered into a clearing services agreement designed to enable
institutions to trade HedgeStreet products in the same way they trade
other exchange -traded derivatives."

About HedgeStreet

HedgeStreet Inc.

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OCC expects to implement STANS later this year.

Business Editors

SAN MATEO, Calif.

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GREENWICH, Conn.
IBG , the parent of global online broker-dealer Interactive Brokers and
global specialist firm Timber Hill, also is the largest independent online
U., www.
Said John Nafeh, Chairman and CEO of HedgeStreet: "This
arrangement opens up institutional trading on HedgeStreet, and with
HedgeStreet's ability to quickly create and deploy financial
instruments on its exchange, will create a new paradigm for the
derivatives industry that will merge the OTC and the listed exchange
markets.hedgestreet.

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HedgeStreet Teams Up with The Clearing Corporation; Enables Institutional Trading on HedgeStreet 's Online Exchange

clearingcorp.

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Our
relationship with HedgeStreet demonstrates our commitment to extending
the spectrum of cleared products in the marketplace.

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This methodology -- called "STANS," for System for Theoretical Analysis
and Numerical Simulations -- will be used to measure the exposure of
portfolios of options, futures and cash instruments cleared and carried by OCC
on behalf of its Clearing Members.
The more accurate margin calculations in STANS should improve the
financial stability of the derivatives markets, and produce clearing and
settlement efficiencies beneficial to investors.
"The strength of our Universal direct-access platform is to give active
traders, hedge funds, investment advisors, institutions and money managers the
ability to trade stocks, options, futures, bonds and foreign exchange around
the world from a single account," added Peterffy. There is a
tremendous demand for direct market access in both," said Peterffy who was
featured among the 40 most influential people in online finance in the March
issue of Institutional Investor . The Clearing Corporation
serves numerous clients in a variety of markets and is the only active
independent futures clearinghouse in the world.

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IBG
came in at number 20 in Institutional Investor 's 2004 ranking and at 25 in
2003.

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0 rating in the trading "costs" category
due to its low execution and clearing costs worldwide. HedgeStreet
also provides hedge funds with the opportunity to trade economic
derivatives and many institutionally traded contracts.

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broker-dealer with
$1 .9 billion in consolidated capital in the annual ranking by Institutional
Investor magazine.hedgestreet .
Under the agreement, CCorp clearing participants, who are also
HedgeStreet members, can permit their customers to trade HedgeStreet
products in the same way contracts are traded on other exchanges ."
Richard Jaycobs, CEO of The Clearing Corporation, said:
"HedgeStreet's class of financial instruments has enormous potential,
and CCorp is proud to take the lead in clearing these contracts.

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These simulated scenarios
incorporate information extracted from the historical behavior of each
individual security as well as its relationship to the behavior of other
securities.----HedgeStreet
Inc. Additional information
on The Clearing Corporation is available at www.

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Operating under the jurisdiction of the
Securities and Exchange Commission and the Commodity Futures Trading
Commission, OCC provides clearing and settlement services for the American
Stock Exchange, the Boston Options Exchange, Chicago Board Options Exchange,
CBOE Futures Exchange, International Securities Exchange, OneChicago, Pacific
Exchange, Philadelphia Stock Exchange and Philadelphia Board of Trade.57
billion in the prior year, while excess net capital rose 17 percent to $600
million. HedgeStreet is privately held and based in San
Mateo, Calif.

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A unit of the Interactive Brokers Group, IB offers Universal Direct-Access
Trading and sophisticated trade management tools at highly competitive costs
to professional traders and investors worldwide. IB is the gateway to trading
a broad array of financial instruments on over 50 exchanges and marketplaces
in 14 countries.

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In that ranking, IB was
the only broker to score a perfect 5. is the nation's first financial market that lets
online retail investors trade innovative financial instruments in
small contract sizes -- previously unavailable to them.

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