Stocks to watch on the Australian stock exchange at the close on Friday:
AGL - AGL ENERGY - down nine cents, or 0.6 per cent, at $14.98
Electricity giant AGL will close its coal fired power stations by 2050 under a new greenhouse gas policy.
PSA - PETSEC - down 0.5 cents, or 4.6 per cent, at 10.5 cents
Oil and gas producer Petsec Energy has struck a deal with Oil Search to take over the operation of an exploration area in Yemen.
RIO - RIO TINTO - down 78 cents, or 1.4 per cent, at $55.09
BHP - BHP BILLITON - down 26 cents, or 0.9 per cent, at $29.97
FMG - FORTESCUE METALS - down 8.5 cents, or 4.4 per cent, at $1.87
Rio Tinto has defended increasing iron ore production even as prices plunge, arguing that being a low cost miner allows it to thrive in the face of continued market volatility which is causing smaller players "significant distress".
STO - SANTOS - up three cents, or 0.4 per cent, at $7.96
Oil and gas producer Santos has suffered a steep fall in quarterly sales revenue because of falling oil prices.
SYD - SYDNEY AIRPORT - down three cents, or 0.6 per cent, at $5.37
Trevor Gerber will replace Max Moore-Wilton as the chairman of Sydney Airport in May.
TLS - TELSTRA - down nine cents, or 1.4 per cent, at $6.14
Pay TV company Foxtel's chairman Robert Nason is stepping down from a leadership role at Telstra.
TWE - TREASURY WINE ESTATES - down five cents, or 0.9 per cent, at $5.64
The maker of Penfolds has refinanced $300 million in debt to extend the length of its loan.
WHC - WHITEHAVEN COAL - up one cent, or 0.7 per cent, at $1.55
Whitehaven Coal has increased its full year production target to 7.2 million tonnes, up from 7.0 million tonnes after a boost in March quarter production.