At lunchtime AEDT on Monday, the benchmark S&P/ASX200 index was up 47.1 points, or 0.57 per cent, 8,330.3, while the broader All Ordinaries was up 41.5 points, or 0.49 per cent, to 8,593.3.
Nine of the ASX's 11 sectors were up at midday - all except tech and industrials.
Technology had fallen 2.4 per cent as Wisetech Global plunged 11.4 per cent to a two-month low of $108.52 after the logistics platform's board said it was actively seeking further information and taking external advice following media reports regarding the conduct of its chief executive and executive director, Richard White.
The board "is conscious of the potential impacts on the company and will carefully evaluate all relevant factors in its assessment", Wisetech said in its statement.
Mineral Resources had dropped 12.6 per cent to a one-month low of $40.09 after its board said it had engaged external legal counsel to investigate tax issues involving managing director Chris Ellison following recent media reports.
The Mineral Resources statement said Mr Ellison had self-reported himself to the Australian Taxation Office, repaid the amounts owed and disclosed the matter to the board.
"While this does not diminish what happened, Mr Ellison profoundly regrets his errors of judgement," the statement said, adding that the board had full confidence in Mr Ellison and his team.
Elsewhere in the mining sector, BHP was up 1.2 per cent to $42.58, Fortescue had added 1.6 per cent to $19.84 and Rio Tinto had grown 1.3 per cent to $119.20.
Goldminers were higher as the precious metal traded at an all-time high of $US2,726 an ounce.
Northern Star had grown 1.6 per cent, Newmont had advanced 2.3 per cent and Evolution was 3.8 per cent higher.
Most of the big four banks were also in the green, with CBA up 0.8 per cent, NAB growing 0.6 per cent and Westpac advancing 0.2 per cent.
ANZ was the outlier, basically flat at $31.57.
In the consumer discretionary sector, Nick Scali was down 5.4 per cent to a three-month low of $14.31 as executives told the furniture retailer's annual general meeting that materially higher unexpected freight rates were impacting its gross profit margin.
Amotiv was up 10.1 per cent to $11 as the automotive parts company formerly known as GUD Holdings announced at its annual general meeting that it would buy back up to five per cent of its outstanding shares.
The Australian dollar was buying 67.18 US cents, from 67.03 US cents at Friday's ASX close.
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