The significant recent surge in diesel prices and indications of further supply shortages are expected to result in higher costs flowing through to the mining sector over the next 2-3 quarters as fuel, contractor and logistics charges are reset, Morgan Stanley said in a note on Thursday.
"Inventories and hedges can delay, but not indefinitely cushion, sustained fuel inflation. Near-term cost resilience may therefore overstate the sector's immunity: productivity gains and stronger by-product credits help, but do not remove the underlying energy-cost exposure," the note said.
Fuel and power costs account for about 15%-20% of the direct operating costs in the sector, with fuel alone at 6%-10%. Diesel's use in haulage, drilling, rail, off-grid power and blasting among other activities means large open-pit operations are particularly vulnerable to higher fuel prices. Meanwhile, reagents, freight and contractors make up for additional indirect exposure.
Diesel prices are nearly double their pre-Iran conflict levels amid lower Russian and Gulf exports, refining constraints and falling inventories. Potential US restrictions on diesel exports could further tighten global supplies and push up delivered prices elsewhere, Morgan Stanley said.