Barrick Gold Corp. and other bullion producers are climbing from 28-year lows relative to the metal as they tame costs, raise cash flow and beat profit estimates. Share-valuation measures have improved since mid-year, suggesting a return of optimism regarding the sector, Kenneth Hoffman, a Bloomberg Industries analyst, said in an Oct. 29 report. Goldcorp Inc. and Agnico-Eagle Mines Ltd. rose the most in almost five months after their earnings last week beat analysts' forecasts. Barrick, the world's largest producer, reports results tomorrow.