<div>Challenges slow Mexico's billion-dollar oil hedge this year -sources</div> <!-- no image --> <div>By Devika Krishna Kumar, Stefanie Eschenbacher and Marianna Parraga<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=vuqKROQp2Ow:dZOhdhujpsI:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=vuqKROQp2Ow:dZOhdhujpsI:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=vuqKROQp2Ow:dZOhdhujpsI:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=vuqKROQp2Ow:dZOhdhujpsI:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=vuqKROQp2Ow:dZOhdhujpsI:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/vuqKROQp2Ow" height="1" width="1" alt=""></div> Posted in: http://feeds.reuters.com/reuters/UKBankingFinancial