Vale Faces Spiraling Losses After Brazil Dam Collapse – The Wall Street Journal

SÃO PAULO—Vale SA’s shares tumbled at the start of trading Monday as the iron mining company potentially faces spiraling losses after a dam burst at one of its mines in southeast Brazil, leaving at least 60 people dead and hundreds missing.

Vale’s ordinary shares fell 19% to 45.00 reais ($12) shortly after they began trading.

The company…