The Australian share market is trading flat despite strong gains in the healthcare sector.

The benchmark S&P/ASX200 index was up 3.8 points, or 0.06 per cent, to 6,547.5 points at 1200 AEST on Thursday, while the broader All Ordinaries was down 2.3 points, or 0.03 per cent, to 6,626.6.

Healthcare shares collectively advanced 2.12 per cent, leading gains by noon.

Pharma giant CSL was up 2.61 per cent to $213.26 while ResMed was up 1.71 per cent to $17.23 and Cochlear added 2.50 per cent at $206.77.

But the tech, energy and consumer discretionaries sectors moved in the opposite direction, each falling about two per cent.

Afterpay was down 9.44 per cent to $23.22 after AUSTRAC ordered an external auditor to probe the buy-now, pay-later provider’s compliance with money laundering and terrorism financing laws.

Energy stocks were affected by a four per cent plunge in oil prices overnight and Santos, Woodside Petroleum, Oil Search, Origin Energy and Beach Energy fell between 1.37 per cent and 4.02 per cent.

Consumer discretionaries, already on the nose after consumer confidence surveys suggested a dip in sentiment, were pulled lower by Wesfarmers following the conglomerate’s announcement that sales at its Target stores continued to disappoint.

Wesfarmers was down 4.03 per cent to $36.71 while Harvey Norman slid 4.64 per cent to $4.11, JB Hi-Fi fell 3.61 per cent to $27.00 and Flight Centre sank 2.99 per cent to $40.93.

Mining giant BHP was down 0.48 per cent to $39.56, Rio Tinto was down 0.43 per cent to $101.97 and Fortescue Metals was down 2.56 per cent to $8.39.

The big four banks all gained, with ANZ up 0.48 per cent to $28.395, Commonwealth up 0.48 per cent to $80.25, NAB up 0.17 per cent to $27.055, and Westpac up 0.57 per cent to $28.20.

CountPlus was up 35.05 per cent to 65.5 cents after Commonwealth Bank said it was selling its Count Financial advice business to the firm.

Challenger was down 7.33 per cent after the investment manager issued a lower guidance range for the next financial year. was up 0.80 per cent to $13.81 after it announced plans to offload its stake in the underperforming Stratton Finance.

The local currency briefly dipped after the release of ABS data that showed unemployment remained steady at 5.2 per cent in May.

The Aussie dollar is buying 69.21 US cents from 69.46 US cents on Wednesday.