 Moodys Investors Service Moodys has today downgraded to B1 from Ba2 the corporate family rating of Compania de Minas Buenaventura S.A.A. Buenaventura. The downgrade to B1 from Ba2 reflects Buenaventuras recently weaker operating results and financial profile, affected by lower volumes at several of its largest mines Uchucchacua, Orcopampa and El Brocal and weak profitability with negative EBIT margin, and Moodys expectation that the companys credit metrics will remain at weak levels at least in 2020 and only gradually recover beyond 2020. 