Stocks to watch on the Australian stock exchange at close on Friday:
BHP - BHP BILLITON - up 53 cents, or 1.66 per cent, at $32.50
BHP Billiton has obtained oil exploration licences from the government of Barbados and plans to explore an area of 5,000 square kilometres about 40 kilometres southeast of the Caribbean island.
VAH - VIRGIN AUSTRALIA - down one cent, or 1.96 per cent, at 50 cents
Virgin Australia has posted a narrower loss during the March quarter as costs fell, passenger yields improved and budget subsidiary Tigerair recovered to turn a small profit.