CHICAGO & SANTIAGO, Chile--(BUSINESS WIRE)--Fitch Ratings has affirmed the long-term foreign currency and local currency Issuer Default Ratings (IDRs) of Compania de Minas Buenaventura S.A.A. (Buenaventura) at 'BBB'. The Rating Outlook is Stable. Buenaventura's credit ratings reflect its low cost position as a miner of precious and base metals, long track record of operations, and conservative debt philosophy of its management. The company exhibited an all-in sustaining cost (AISC) for gold of
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