LDK is one of perhaps two or three manufacturers world wide that will still be able to make a profit on poly when it falls to $40/Kg. It's new 15,000 ton plant is coming onstream Q3 2009 and expects to get production costs down to $30/Kg by the end of the year!
So this leaves two ways the market can go:
1) Poly prices go back up, in which case LDK will be massivly profitable.
2) Poly prices fall below current $60/Kg in which case, competition will get killed and LDK's market share will go up rapidly. Again, huge profits.
I prefer the latter scenario as it is more likely and will generate astronomical market demand as PV starts to become affordable for ordinary housholds around the world.