Preliminary estimates for August indicate that the index decreased by 6.0 per cent (on a monthly average basis) in SDR terms, after increasing by 7.0 per cent in July (revised). The rural and base metals sub-indices increased in the month, while the non-rural sub-index decreased. In Australian dollar terms, the index decreased by 4.6 per cent in August.

Over the past year, the index has increased by 50.3 per cent in SDR terms, led by higher iron ore prices. The index has increased by 49.3 per cent in Australian dollar terms.

Consistent with previous releases, preliminary estimates for iron ore, coking coal, thermal coal and LNG export prices are being used for the most recent months, based on market information. Using spot prices for the bulk commodities, the index decreased by 11.2 per cent in August in SDR terms, to be 47.1 per cent higher over the past year.