if you guys knew how companies worked .. or specifically trina solar
you would understand that they are signing supply agreements which are
not at the spot price... the spot is what it is right now to buy it..
it does not mean trina solar is buying at that price.. they have been
signing supply contracts which are extremely liekly to be more
reasonable...  aside from that it is obvious that the cost  (1 billion
dollars) to build a plant does not outweigh the benefit they would get
from producing silicon themselves.. read the article below..
especially the end.. the polysilicon supply issue will no longer be
one in 2 years time.. which means prices will come down if not
sooner.. which means future contracts signed by trina solar are only
more beneficial

http://www.forbes.com/markets/2008/04/02/solar-energy-conference-mark...