Preliminary estimates for May indicate that the index increased by 0.3 per cent (on a monthly average basis) in SDR terms, after decreasing by 4.0 per cent in April (revised). The rural and base metals subindices increased in the month, while the non rural index was unchanged. In Australian dollar terms, the index increased by 0.6 per cent in May.

Over the past year, the index has increased by 3.6 per cent in SDR terms, led by higher LNG, thermal coal and oil prices. The index has increased by 6.1 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 increased by 2.2 per cent in May in SDR terms, to be 7.5 per cent higher over the past year.