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subject to fluctuation and, consequently, the amount realized in the subsequent sale of an investment may differ significantly from its current reported value. fluctuations in the market price of a security may result from perceived changes in the underlying economic characteristics of the issuer, the relative price of alternative investments and general market conditions. the table below summarizes equity investments that are subject to equity price fluctuations at december 31, 2012. equity investments are included in other assets in our consolidated balance sheets. (in millions) carrying unrealized net of tax.
| (in millions) | CostBasis | FairValue | CarryingValue | UnrealizedGain,Net of Tax |
| --------- | --------- | --------- | --------- | --------- |
| BM&FBOVESPA S.A. | $262.9 | $690.6 | $690.6 | $271.4 |
| Bolsa Mexicana de Valores, S.A.B. de C.V. | 17.3 | 29.3 | 29.3 | 7.6 |
| IMAREX ASA | — | 1.8 | 1.8 | 1.1 |
we do not currently hedge against equity price risk. equity investments are assessed for other-than- temporary impairment on a quarterly basis. .
Please answer the following question with expressions if necessary.
and what was the difference between that fair value and the cost basis for the bolsa mexicana de valores s.a.b . de c.v .?
assistant
subtract(29.3, 17.3)