BHP Billiton beats iron ore guidance, takes copper write-downs

[caption id="attachment_829738" align="aligncenter" width="600"] The world's No.1 miner will continue boosting its iron ore output, adding to a global glut and keeping pressure on prices.[/caption] World's No.1 miner BHP Billiton (ASX, NYSE:BHP) (LON:BLT) said Wednesday its iron-ore output surpassed all expectations for...