UPDATE 2-Citi combines its stock trading and prime brokerage business <!-- no image --> <div>Citigroup Inc is combining its stock trading business with its prime brokerage unit, which caters to hedge funds, private equity firms and other investors.<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ZvTsjd4Itag:B_q8qIjp1ug: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=ZvTsjd4Itag:B_q8qIjp1ug:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=ZvTsjd4Itag:B_q8qIjp1ug:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ZvTsjd4Itag:B_q8qIjp1ug:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=ZvTsjd4Itag:B_q8qIjp1ug:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/ZvTsjd4Itag" height="1" width="1" alt=""></div> Posted by Reuters