4.- Until December 31, 2013, Mexichem valued its assets at market value; In line with other companies in the petrochemical industry, Mexichem decided to value its assets based on historical cost. On December 31 there was an impact of (US $ 495mn) against Mexichem's OCI.

REQUESTED:

i) What impact do you expect on the share price derived from the change in the asset valuation policy?

ii) How much does Mexichem's operating flow change for 2013?

iii) As a result of the accounting change, what effect do you expect for the 2014 gross, operating and net margin? iv) Under which valuation method do you expect higher ROICs.