At 11:40am, the S&P/ASX 200 is 0.24 per cent lower at 8,229.60.
The SPI futures are pointing to a fall of 24 points.
Best and worst performers
The best-performing sector is Materials, up 0.88 per cent. The worst-performing sector is Consumer Staples, down 2.99 per cent.
The best-performing large cap is Pilbara Minerals (ASX:PLS), trading 4.56 per cent higher at $2.98. It is followed by shares in Pro Medicus (ASX:PME) and Telix Pharmaceuticals (ASX:TLX).
The worst-performing large cap is Woolworths Group (ASX:WOW), trading 5.7 per cent lower at $30.94. It is followed by shares in James Hardie Industries plc (ASX:JHX) and Coles Group (ASX:COL).
Commodities and the dollar
Gold is trading at US$2790.80 an ounce.
Iron ore is 0.2 per cent lower at US$103.30 a tonne.
Iron ore futures are pointing to a 0.76 per cent rise.
One Australian dollar is buying 65.55 US cents.