The Reserve Bank of Australia reported that its commodity price index rose by a preliminary 1.4% in special drawing rights terms on a monthly average basis in September, following a 0.3% increase in August. Rural, non-rural and base metals prices all increased. In Australian dollar terms, the index gained 1.0% during the month. Over the past year, the index increased by 15.5% in special drawing rights terms and 6.6% in Australian dollar terms, with gains across most commodities except iron ore, alumina and copper ore. Using spot prices for bulk commodities, the index rose by 3.3% in September and 17.7% over the year. Estimates for recent iron ore, coking coal, thermal coal and liquefied natural gas export prices remain preliminary and are based on market information.