EMERGING MARKETS-Chile peso falls as copper drops, North Korea weighs

(Updates with final prices, context) By Bruno Federowski SAO PAULO, Sept 8 (Reuters) – Chile’s peso on Friday postedits biggest daily drop in four months as traders questionedwhether a rally in copper that has underpinned the currency’supswing was justified, while geopolitical tensions weighed onother markets such as Mexico. Markets were cautious as South Korea waited out the risk ofanother missile test by North Korea on Saturday, the anniversaryof its founding. North Korea ma