Exhibit 12

NYSE Euronext

Computation of Ratio of Earnings to Fixed Charges



|                                                 |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|------------------------------------------------ |  | ----------------------- | ---- | - | ---- | - | ----- |  | ---- | ------ | ---- | - | ----- |  | - | -----
|                                                 |  | Year-ended December 31,
|($ in millions, except ratio)                    |  | 2008                    |      |   | 2007 |   | 2006  |  | 2005 |        | 2004
|Determination of Earnings:                       |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|(Loss) income from continuing operations before  |  | $                       | (646 | ) |      | $ | 882   |  | $    | 329    |      | $ | 91    |  | $ | 43   
|income tax provision and minority interest(1)(2) |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|Add:                                             |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|Fixed charges                                    |  |                         | 150  |   |      |   | 129   |  |      | 3      |      |   | 6     |  |   |      
|                                                 |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|Pre-tax (losses) earnings before fixed charges   |  |                         | (496 | ) |      |   | 1,011 |  |      | 332    |      |   | 97    |  |   | 43   
|                                                 |  |                         |      |   |     
|Fixed Charges:                                   |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|Interest expense                                 |  |                         | 149  |   |      |   | 126   |  |      |       |      |   |      |  |   |     
|Other(3)                                         |  |                         | 1    |   |      |   | 3     |  |      | 3      |      |   | 6     |  |   | 3    
|                                                 |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|Fixed charges                                    |  |                         | 150  |   |      |   | 129   |  |      | 3      |      |   | 6     |  |   | 3    
|Preference security dividend requirements        |  |                         |     |   |      |   |      |  |      |       |      |   |      |  |   |     
|                                                 |  |                         |      |   |      |   |       |  |      |        |      |   |       |  |   |      
|Total fixed charges                              |  |                         | 150  |   |      |   | 129   |  |      | 3      |      |   | 6     |  |   | 3    
|Ratio of (losses) earnings to fixed charges(4)   |  |                         | N/A  |   |      |   | 7.84  |  |      | 110.67 |      |   | 16.17 |  |   | 14.33



|(1) | Pre-tax income from continuing operations excludes income from associates.
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|(2) | Includes non-cash impairment charges of $1,590 million for year ended December 31, 2008.
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|(3) | Other fixed charges consist of the interest factor in capital and operating leases.
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|(4) | Due to the loss in 2008, earnings were insufficient to cover fixed charges by $646 million.
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