Sierra Metals Inc. (SMTS) Reports Q3 Loss, Lags Revenue Estimates Posted byZacks Equity Research November 9, 2021 Leave a comment on Sierra Metals Inc. (SMTS) Reports Q3 Loss, Lags Revenue Estimates Sierra Metals Inc. (SMTS) delivered earnings and revenue surprises of -140.00% and -11.00%, respectively, for the quarter ended September 2021. Do the numbers hold clues to what lies ahead for…