Fish farmer Clean Seas Tuna's shares have risen more than 27 per cent after it forecast a $4 million to $6 million full year loss and said a profit was in sight.

GNC - GRAINCORP LTD - steady at $12.75

Australia's largest grains handler has reported one-third profit drop as regulators consider a takeover bid from an American food giant.

RIO - RIO TINTO LTD - down $1.09 at $54.68

The maritime union has accused the owners of a Newcastle coal terminal of "continued belligerence" amid an ongoing industrial dispute at the facility.

SYD - SYDNEY AIRPORT - up three cents at $3.69

Sydney Airport has forecast larger distributions for its shareholders as its number of passengers continues to rise.

TAH - TABCORP HOLDINGS LTD - steady at $3.60

Gambling firm Tabcorp has begun legal action against the Victorian government over a poker machine levy set to cost the company millions of dollars.

TLS - TELSTRA CORPORATION LTD - up six cents at $5.07

NWS - NEWS CORPORATION - down 40 cents at $33.70

NWSLV - NEWS CORPORATION LTD NON-VOTING COMMON STOCK - down 15 cents at $33.54

Foxtel says it will compensate its customers who did not receive a promised free television within 10 days as promised as part of a promotional offer.

VAH - VIRGIN AUSTRALIA HOLDINGS LTD - down eight cents at 38 cents

Virgin Australia's shares have tumbled following a profit warning issued by the airline after the market closed on Wednesday.

WPL - WOODSIDE PETROLEUM LTD - up 25 cents at $37.70

Woodside Petroleum is keeping an eye on an offshore gas field in Mozambique that is five times bigger than its North West Shelf project.

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Aust shares open lower

23/05/2013 14:01Sydney, Australia. 23 May,2013

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