Shares in South 32 have fallen after the diversified miner's annual production of many commodities, including coal, dropped and the company missed its full-year production guidance on some of them.

Bad weather and challenging conditions at various operations impacted South32’s performance over the 2016/17 full financial year. South32’s June quarterly production report showed that aluminium annual production for fiscal 2017 rose two per cent and manganese ore production lifted by five per cent compared to fiscal 2016. But output for…