Aluminium prices were set for their biggest weekly decline since last October as falling alumina prices and a weak demand outlook dragged the metal used in transport and packaging to its lowest level since January 2017. SEE MORE Metals took the spotlight in the third quarter, with silver and nickel shaking off worries over a slowdown in the global economy to score the largest percentage gains among major commodities since the end of June. SEE MORE World share markets dipped on Friday, with concerns about U.S. political developments after a whistleblower complaint against President Donald Trump denting optimism about an easing of U.S.-China trade tensions. SEE MORE The Asian paraxylene (PX) market is unlikely to elude a longer supply going forward as demand will stay weak while new capacities are due to come on stream before the end of the year. SEE MORE London copper ticked higher on Friday on signs of progress towards a trade deal between the world's two largest economies, but was set to post a weekly decline on concerns over Chinese demand. SEE MORE