Canada’s largest diversified miner has warned of an after-tax loss of C$86-million, or C$0.15 a share, for the fourth quarter, which is “significantly” below current consensus estimates. The loss warning follows the disappointing fourth-quarter financial results of Teck’s energy business unit and trail operations, as well as inventory valuations. The company said in a statement late on Thursday that these factors, together, reduced earnings by C$0.30 a share and earnings before interest, taxes, depreciation and amortisation by C$195-million.