(Bloomberg) -- Sibanye Stillwater Ltd. expects to report a loss for last year after slumping platinum-group metals prices and operational problems across its businesses forced it to take impairments of 47.5 billion rand ($2.5 billion)Most Read from BloombergYour 401(k) Will Be Gone Within a DecadeLargest Covid Vaccine Study Yet Finds Links to Health ConditionsPlay VideoUS Tells Allies Russia May Launch Anti-Satellite Nuclear Weapon Into Space This YearBill Ackman Rockets Up Best-Paid Hedge Fund