Subscriber OnlyMarketsCopper Giant’s CEO Is Hopeful Second Half of 2019 Will Be ‘Brilliant’Photographer: Cristobal Olivares/BloombergByLaura Millan Lombrana+FollowAugust 30, 2019, 5:21 PM UTCCodelco, the world’s largest copper miner, described the first half of the year as “blood, sweat and tears” as its output and earnings were hit by falling prices of the metal, trade tensions, unexpected weather events and a strike.