Buenaventura Announces Fourth Quarter 2018 Production, Volume Sold per Metal Results and 2019 Guidance http://www.cbs8.com/story/39783880/buenaventura-announces-fourth-quarter-2018-production-volume-sold-per-metal-results-and-2019-guidance Posted: Jan 14, 2019 4:17 AM PST Updated: Jan 14, 2019 4:17 AM PST