Boliden Plunges as Seismic Activity Prompts Cut at Key Zinc Mine

Boliden AB’s shares fell the most in 18 years after the company said it will run a major zinc mine in Sweden at 30% capacity until further notice, following a period of abnormally high seismic activity.

The Stockholm-listed company’s shares plunged more than 19% after it said mining at its Garpenberg operation will resume at a reduced rate in the second quarter. The miner halted operations at the site earlier this month after a rockfall caused by elevated seismic activity.