London-listed copper miner Antofagasta has better medium-term growth prospects than its peers, J.P. Morgan analysts write as they upgrade the stock to overweight from neutral and raise its target price to 4,500 pence from 3,400 pence. The miner can grow its output by up to 30% by 2028 as its Centinela second concentrator project progresses, they add. This growth is relatively lower-risk than peers given it relies on expanding existing projects, they write. A tug of war for copper between the U.S. and China will keep prices elevated while supply-side risks could continue to tighten the market, the analysts write. Shares rise 0.2% to 3,877 pence. (adam.whittaker@wsj.com)