UPDATE 5-HSBC warns of restructuring pain ahead as outlook darkens <!-- no image --> <div>* Shares fall 3% (Adds London share reaction, investment bank performance)<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=qnrKd_dU1ws:rw6Rjz2ExXM: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=qnrKd_dU1ws:rw6Rjz2ExXM:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=qnrKd_dU1ws:rw6Rjz2ExXM:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=qnrKd_dU1ws:rw6Rjz2ExXM:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=qnrKd_dU1ws:rw6Rjz2ExXM:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/qnrKd_dU1ws" height="1" width="1" alt=""></div> Posted by Reuters