SMTS - Sierra Metals Inc. (SMTS) Q2 2022 Earnings Call Transcript August, 12 2022 07:00 PM Sierra Metals Inc. Image source: The Motley Fool. Sierra Metals Inc. (NYSEMKT: SMTS) Q2 2022 Earnings Call Aug 12, 2022 , 11:00 a.m. ET Operator Continue reading For further details see: Sierra Metals Inc. (SMTS) Q2 2022 Earnings Call Transcript