The Lima Stock Exchange's General Index declined 0.33% to close at 20634.18. The blue-chip Selective Index fell 0.82% to end at 29799.09.
Precious-metals mining company Compania de Minas Buenaventura SA lost 2.8% to end at $38.35, Dow Jones Newswires reported.
Copper mining company Sociedad Minera Cerro Verde SAA decreased 2.2% to close at $37.
Companies that saw gains include base metals mining company Southern Copper Corp., which rose 3.4% to $30.60.
Financial-holding company Credicorp Ltd. ended 2.4% higher at $121.13. Credicorp owns Peru's largest bank, Banco de Credito.