Falling yields rock U.S. mortgage bond market <!-- no image --> <div>The massive U.S. bond market rally has not been a boon for all types of fixed-income securities.<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=F9uEBSjnLzQ:k3ig_5hnZc8: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=F9uEBSjnLzQ:k3ig_5hnZc8:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=F9uEBSjnLzQ:k3ig_5hnZc8:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=F9uEBSjnLzQ:k3ig_5hnZc8:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=F9uEBSjnLzQ:k3ig_5hnZc8:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/F9uEBSjnLzQ" height="1" width="1" alt=""></div> Posted by Reuters