The Australian share market gave up the bulk of its earlier gains in late-morning trade, with a sell-off in the resources sector weighing on the broader market.
Just before 12:00pm AEDT the All Ordinaries Index was up six points to 4,749 and the ASX 200 was four points higher at 4,728.
Rio Tinto extended its losses to just over 1 per cent and BHP Billiton was down almost 0.5 per cent.
Fortescue Metals bucked the trend, with gains of 2.6 per cent.
Commonwealth Bank shares were 33 cents lower at $62.92, while investment bank Macquarie Group was up almost 1.4 per cent.
Shares in the Australian Securities Exchange were up 1.3 per cent after the stock market operator announced an increase in values during December.
The Australian dollar was buying 104.81 US cents.