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Grupo Mexico Shares Fall as Congress Responds to Spill

Grupo Mexico SAB, the world’s fourth-largest copper producer, fell the most since March after congress called for a cancellation of the company’s Cananea mine concession following a chemical spill.

Grupo Mexico, billionaire German Larrea’s holding company, fell 2.9 percent to 45.75 pesos at 1:21 p.m. in Mexico City. Earlier it lost as much as 3.9 percent, the most intraday since March 13. The shares have lost 5.3 percent since a copper sulfate solution spill was detected at the company’s Cananea mine Aug. 6 in the northern Sonora state.