Shares in the materials sector fell along with a pullback in gold prices on increased market expectations that the Federal Reserve would raise interest rates this year.

BHP Group said it expects to write down the value of its giant potash project in Canada by roughly $2.3 billion, as it announced another cost overrun on a mine that is set to become one of the biggest sources of the fertilizer ingredient globally. The company said that it now expects an expansion of the Jansen project in Canada's Saskatchewan province to cost $6.9 billion, up from an estimate of $4.9 billion when it approved the second-stage development in 2023.

Write to Patrick Sullivan at patrick.sullivan@wsj.com

(END) Dow Jones Newswires

June 18, 2026 17:31 ET (21:31 GMT)