UPDATE 1-Ride-hailing firm Grab says to invest $500 mln in Vietnam over five years <!-- no image --> <div>* Investment a reflection of Grab's commitment to Vietnam - exec<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=7M5mwqeJXHQ:2cmZNP7-Zag: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=7M5mwqeJXHQ:2cmZNP7-Zag:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=7M5mwqeJXHQ:2cmZNP7-Zag:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=7M5mwqeJXHQ:2cmZNP7-Zag:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=7M5mwqeJXHQ:2cmZNP7-Zag:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/7M5mwqeJXHQ" height="1" width="1" alt=""></div> Posted by Reuters