Please answer the given financial question based on the context.
Context: 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|unrealizedgainnet 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|2014|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. .
Question: what is the unrealized gain pre-tex for bm&fbovespa?
Answer:
427.7