ISE To Deliver Historical Market Data Offering; Latest Component of ISE's Market Information Initiative

The International Securities Exchange (NYSE: ISE)
announced today the launch of a historical market data offering in
response to member and investor requests for information and market
data to help improve trading efficiency. Historical tick market data
is the most recent component of ISE's overall market information
initiative which includes previously announced depth-of-book and
sentiment market data offerings.
   The initial product offering will include ISE tick data, trades
and quotes, as well as comprehensive Options Price Reporting Authority
(OPRA) tick data, delivered on a daily basis through a complete
end-of-day file. Historical market data, not previously available as a
complete, raw end-of-day data source, can be used for multiple
functions, including back-testing of trading models, post-trade
analysis, compliance, and time and sales queries.
   Initially, the ISE will make two historic data offerings
available. There will be an annual subscription to an end-of-day file
and the ability to make ad-hoc requests for specific time periods. The
end-of-day data will be available as a flat file accessible from an
FTP server over the Internet. The ad-hoc requests will be processed
and delivered on a portable hard-drive device which can be reused by
the client. In an effort to make this data accessible and
cost-effective, both offerings will be delivered as compressed files
to reduce delivery bottlenecks.
   David Krell, CEO, noted "This historical market data offering is
in keeping with ISE's overall strategy to grow our Information and
Market Data business, a key strategic initiative in 2006. This
product, along with our recently announced enhanced ISE Sentiment
Index (ISEE) data and options depth-of-market data offerings, delivers
actionable market information to our clients to help them trade
smarter."
   ISE is leveraging its existing data platform to create this
offering and anticipates future enhancements. These subscription
offerings are expected to be available in early 2006, with pricing
subject to SEC approval.

   ISE Background

   The International Securities Exchange, the world's largest equity
options exchange, was founded on the principle that technology fosters
and infuses new efficiencies and operational innovations into
securities trading. After developing an innovative market structure
that integrated auction market principles into an advanced
screen-based trading system, ISE launched the first fully electronic
US options exchange in May 2000. ISE continually enhances its trading
systems to provide investors with the best marketplace to execute
their options orders.
   For more information about ISE, its products and its technology,
visit www.iseoptions.com.

   Forward Looking Statements

   This press release contains "forward looking statements." These
statements relate to future events or our future financial
performance, and involve known and unknown risks, uncertainties and
other factors that may cause our actual results, levels of activity,
performance or achievements, to be materially different from those
contemplated by the forward looking statements. We undertake no
ongoing obligation, other than that imposed by law, to update these
statements. Factors that could affect our results, levels of activity,
performance or achievements and cause them to materially differ from
those contained in the forward looking statements can be found in our
filings with the Securities and Exchange Commission, including our
registration statement on Form S-1, current reports on Form 8-K and
quarterly reports on Form 10-Q, as amended.