Stocks to watch on the Australian stock exchange at noon on Friday:

BBG – BILLABONG – up 4.5 cents or 5.6 per cent to 84.5 cents

Billabong’s chief financial officer Craig White has left the troubled surfwear retailer.

BLY – BOART LONGYEAR – up 10 cents or 5.8 per cent to $1.81

Mining services company Boart Longyear says it will continue to look for cost savings after implementing cuts that resulted in 2,500 job losses.

CSS – CLEANSEAS TUNA – down 1.5 cent down 42.8 cents to two cents

Cleanseas Tuna anticipates suspending its tuna propagation program for at least the 2013/14 summer, and to direct its limited financial resources to its Yellowtail Kingfish operations.

DXS – DEXUS PROPERTY GROUP – down 4.5 cents or 4.26 per cent to $1.01

Dexus Property Group has spent $504 million to take part ownership in several major Sydney office properties.