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 $US57 mark.

ORG – ORIGIN ENERGY

STO – SANTOS

WPL – WOODSIDE PETROLEUM

Oil prices have again tumbled, with WTI crude down almost four per cent.