Australian shares have opened higher led by gains in the health care sector.

The benchmark S&P/ASX200 index was up 11.9 points, or 0.19 per cent, to 6,350.3 points at 1030 AEST on Friday, while the broader All Ordinaries was up 11.3 points, or 0.18 per cent, to 6,441.3.

Healthcare shares advanced 1.33 per cent as a whole in the first half hour of trade, helping flip the ASX into positive territory after the market initially opened lower.

ResMed surged 6.28 per cent to $15.73 after it released its third quarter results while CSL added 1.25 per cent to $203.77.

The energy sector recorded the largest losses – collectively falling 0.73 per cent – after oil prices tumbled almost three per cent overnight.

Santos, Woodside Petroleum, Oil Search, Origin Energy and Beach Energy were down between 0.47 per cent and 2.64 per cent.

Macquarie Group fell 5.25 per cent to $129.045 after beating full-year profit guidance but warning of a more subdued outlook, ensuring the heavyweight financial sector remained in negative territory.

The Aussie dollar is buying 69.98 US cents, from 70.19 US cents on Thursday.