Stocks to watch at noon on Thursday

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

LYC - LYNAS CORPORATION - down 3.5 cents, or 17.07 per cent, at 17 cents

Shares in Lynas Corporation have slumped, with investors disappointed by a fall in prices and the troubled rare earths miner's ongoing cash flow problems.

NST - NORTHERN STAR - down 6.75 cents, or 3.80 per cent, at $1.7075

Gold miner Northern Star has easily beaten its quarterly production target following a string of acquisitions.

OGC - OCEANAGOLD - down 28 cents, or 8.23 per cent, at $3.12

OceanaGold, which operates the goldfields in Otago and Buller, has posted a first-half profit as its Didipio operation in the Philippines helped lift first-quarter earnings to a record.

SHL - SONIC HEALTHCARE - up 20 cents, or 1.11 per cent, at $18.22

Sonic Healthcare will partner with leading London hospitals to establish a state of the art pathology and analytics service for the UK's National Health Service.

WPL - WOODSIDE PETROLEUM - down 58 cents, or 1.35 per cent, at $42.30

A shareholder vote on Woodside Petroleum's plan to buy back $US2.7 billion worth of shares from Royal Dutch Shell looks likely to go down to the wire.