Stocks to watch on the Australian stock exchange:

BHP – BHP BILLITON

FMG – FORTESCUE METALS GROUP

RIO – RIO TINTO

The price of iron has again fallen, but remains above the $US55 mark – just.

ORG – ORIGIN ENERGY

STO – SANTOS

WPL – WOODSIDE PETROLEUM

Oil prices have again tumbled, with both Brent and WTI crude down more than two per cent.