US Steel (NYSE:X) -2% post-market Thursday after issuing downside guidance for Q1, seeing a loss of $0.49-$0.53/share vs. analyst consensus of a $0.32/share loss, while adjusted EBITDA is expected to total ~$125M.

The company said Q1 flat-rolled segment adjusted EBITDA is expected to come in lower than Q4, primarily due to typical seasonal logistics constraints in the mining sector, partially offset by higher average selling prices and increased volumes, while mini-mill segment adjusted EBITDA is expected higher than Q4 due to an increase in shipments, with a ~$50M in ramp-related impact from Big River 2.

"The North American flat-rolled segment's commercial strategy, combined with a strong emphasis on operational efficiencies and cost management, continues to drive strength within the segment. Our mini-mill segment should see a sequential improvement based on increasing volumes from both Big River Steel and Big River 2," US Steel (NYSE:X) President and CEO David Burritt said.