The ASX couldn't hold on to early gains, turning lower through the morning as losses for Commonwealth Bank shares weighed.
The S&P/ASX 200 traded down 8 points, or 0.1 per cent, at 6217 while the All Ordinaries lost 6 points, or 0.1 per cent, to trade at 6315 and the Australian dollar slipped to US74.27¢.
Commonwealth Bank shares dragged on the index, with the bank moving down 2.1 per cent, after telling shareholders that it will spin off its wealth management arm Colonial First State and its mortgage broking businesses, and may also sell its insurance arm.
CEO Matt Comyn also unveiled a new executive team, making six key appointments including a new head of retail banking and new chief risk officer.
Other banks were also lower, with NAB down 1.1 per cent, Westpac down 0.8 per cent and ANZ lower by 0.6 per cent.
The losses for the banks offset gains in energy sector which came after a surge in oil prices in New York on Friday, with BHP up 1.6 per cent, Woodside up 1.8 per cent. Origin Energy up 1.7 per cent and Oil Search up 2.5 per cent.
Credit Corp was another strong performer, as the firm's shares rallied 7.2 per cent after an upgrade to overweight at JPMorgan.