【Ferro-alloys.com】:Earnings at Rio Tinto and BHP Group are seen declining 48% and 28%, respectively, for the six months to December 2022, while Fortescue's half-year earnings are set to slide about 16%, based on estimates from Visible Alpha and Vuma Financial.

The miners are expected to offer a mixed outlook for 2023, amid uncertainty over the strength of China's recovery following the lifting of its strict COVID-19 curbs.

"We haven't seen too much hard data from China just yet, but I think there's enough for the miners to be more optimistic - cautiously so," said Adrian Prendergast, an analyst at Morgans Financial in Melbourne.

The companies are also facing higher materials and fuel costs and a dearth of skilled workers that could impinge on their expansion projects.

Average realised prices for iron ore fell sharply in the six months to December, hitting earnings.

Dividend payouts are expected to fall, undermined by the weaker earnings and a push by the major diversified miners to fund growth, be it through building their own projects or through acquisitions, analysts at Goldman Sachs wrote in a note.

Buyout activity has been ramping up in the mining sector, as evidenced by Rio's recent $3.3 billion takeover of Canada's Turquoise Hill to gain control of its Mongolian copper mine, and BHP's A$9.6 billion offer for copper and gold producer OZ Minerals.

BHP, which will report its first-half results on Feb. 21, is expected to record attributable profit from total operations of $6.82 billion, down from $9.44 billion.

First-half net profit at Fortescue, reporting on Feb. 15, is seen declining to $2.34 billion from $2.78 billion. BHP and Fortescue report on a July-June financial year.

Underlying half-year profit at Rio Tinto, which reports on a calendar year cycle, is seen declining 48% to $4.77 billion from $9.21 billion. Rio will report on Feb. 22.

• [Editor:Alakay]