TMX Group Limited Announces Credit Rating for Commercial Paper Program

May 30, 2014

May 30, 2014 (TORONTO) - TMX Group Limited ("TMX Group") today announced that it has established a commercial paper program under which it may issue up to $400 million in short term promissory notes ("Notes"), which have been rated R-1 (low) with a Stable trend by DBRS Limited. The Notes will be used by TMX Group to refinance a portion of its long term debt and for general corporate purposes. In connection with the commercial paper program, TMX Group has entered into a new credit agreement, replacing its credit agreement dated September 30, 2013, which is available to backstop the commercial paper program and for general corporate purposes.

This press release does not constitute an offer to sell or a solicitation of any offer to buy any securities in any jurisdiction.

Caution Regarding Forward-Looking Information

This press release of TMX Group contains "forward-looking information" (as defined in applicable Canadian securities legislation) that is based on expectations, assumptions, estimates, projections and other factors that management believes to be reasonable as of the date of this press release. Often, but not always, such forward-looking information can be identified by the use of forward-looking words such as "plans", "expects", "is expected", "budget", "scheduled", "targeted", "estimates", "forecasts", "intends", "anticipates", "believes", or variations or the negatives of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved or not be taken, occur or be achieved. Examples of forward-looking information in this press release include, but are not limited to, factors relating to capital market condition, financial condition, operations and prospects of TMX Group which are subject to significant risks and uncertainties.

Forward-looking information, by its nature, requires us to make assumptions and is subject to significant risks and uncertainties which may give rise to the possibility that our expectations or conclusions will not prove to be accurate and that our assumptions may not be correct. Such factors include, but are not limited to: market competition; economic conditions generally; adverse effects on our results caused by global economic uncertainties; regulatory constraints; the level of trading and activity on markets, and particularly the level of trading in TMX Group's key products; and the continued availability of financing on appropriate terms for future projects. A description of the above-mentioned items is contained under the heading Risks and Uncertainties in the 2013 Annual MD&A.

We have no intention to update this forward-looking information, except as required by applicable securities law. This forward-looking information should not be relied upon as representing our views as of any date subsequent to the date of this press release. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking information.

About TMX Group (TSX: X)

TMX Group's key subsidiaries operate cash and derivative markets and clearinghouses for multiple asset classes including equities, fixed income and energy. Toronto Stock Exchange, TSX Venture Exchange, TMX Select, Alpha Group, The Canadian Depository for Securities, Montreal Exchange, Canadian Derivatives Clearing Corporation, Natural Gas Exchange, BOX Options Exchange, Shorcan, Shorcan Energy Brokers, Equicom and other TMX Group companies provide listing markets, trading markets, clearing facilities, depository services, data products and other services to the global financial community. TMX Group is headquartered in Toronto and operates offices across Canada (Montreal, Calgary and Vancouver), in key U.S. markets (New York, Houston, Boston and Chicago) as well as in London, Beijing and Sydney. For more information about TMX Group, visit our website at http://www.tmx.com. Follow TMX Group on Twitter at https://twitter.com/tmxgroup.