Stocks to watch at close on Friday

Market watch top headlines

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

BHP - BHP BILLITON - down 72 cents at $31.30

BHP Billiton has had to write down the value of its American shale gas assets by $US2.84 billion ($A2.73 billion).

CSL - CSL LTD - down $1.07 at $40.28

The head of blood products and vaccines maker CSL will leave the company in 2013 after 23 years in the job.

OSH - OIL SEARCH LTD - down seven cents at $7.00

Oil Search's loading operations in Papua New Guinea remain suspended after an oil spill that occurred more than a week ago.

RMD - RESMED INC - up 28 cents at $3.30

Sleep disorder equipment supplier ResMed's annual profit is up 12 per cent due to stronger revenue in the United States.