Stocks to watch at noon on Monday STOCKS to watch on the Australian stock exchange at noon on Monday: AMC - AMCOR - down 17 cents, or 1.68 per cent, at $9.97 Packaging company Amcor says it will acquire Jiangsu Shenda Group's flexible packaging operations for 350 million Ren Min Bi (RMB) ($A62.20 million). BLY - BOART LONGYEAR - down 4.5 cents, or 6.67 per cent, at 63 cents Drilling services company Boart Longyear says earnings may be downgraded further as market conditions deteriorate. MGR - MIRVAC - down 4.5 cents, or 2.80 per cent, at $1.56 AMP - AMP - down 1.00 cent, or 0.24 per cent, at $4.25 Property developer and investment manager Mirvac Group is selling half its stake in the land and development of 200 George St, Sydney, to AMP Capital Wholesale Office Fund (AWOF). ORG - ORIGIN ENERGY - down 41 cents, or 3.26 per cent, at $12.16 The NSW government will pay energy company Origin to terminate its obligation to develop a coal mine at Cobbora, saving taxpayers more than $1.5 billion, Treasurer Mike Baird says.