Alumina Limited managing director Mike Ferraro expects the inflationary pressures that pushed his company’s unit costs up by 32 per cent over the past year have peaked, in a welcome sign amid a slump in prices for Alumina’s eponymous commodity.

Alumina received an average of $US398 per tonne for its product over the past six months, but the daily market price for alumina has since slumped to about $US330 per tonne.