Stocks to watch on the Australian stock exchange:

AAD – ARDENT LEISURE – up 13.5 cents, or 7.8 per cent, at $1.865

Ardent Leisure has agreed to sell its bowling and entertainment division to a company owned by private equity investors for $160 million.

ANZ – ANZ BANKING GROUP – down 5 cents, or 0.2 per cent, at $28.97

CBA – COMMONWEALTH BANK OF AUSTRALIA – up 7 cents, or 0.1 per cent, at $80.37

NAB – NATIONAL AUSTRALIA BANK – down 17.5 cents, or 0.6 per cent, at $29.675

WBC – WESTPAC – up 1 cent, or 0.03 per cent, at $31.49

Australians will no longer receive unsolicited offers to boost their credit card limits under industry-wide changes to banking practices.

DOW – DOWNER EDI – up 13 cents, or 1.9 per cent, at $6.99

Downer EDI has been awarded a $400 million contract to provide mining services at the Gruyere Gold Project in Western Australia.

ORI – ORICA – up 5 cents, or 0.3 per cent, at $18.17

Explosives and industrial chemicals maker Orica has signed a deal to buy mining technology company GroundProbe Holdco for $205 million.

TPM – TPG TELECOM – down 5 cents, or 0.75 per cent, at $6.58

TPG Internet will compensate nearly 8,000 customers after failing to provide the fast national broadband network speeds consumers were paying for.