It is getting more difficult all the time to figure out what anything is worth. In the past it was the free markets that answered that question, although some people like to argue with the markets it is usually best to accept the markets as the ultimate appraiser. Unfortunately now we have government interference in all aspects of the free market system. They have funds fo buy toxic assets(TARP) which is to keep assett prices above the debt owed so people do not walk away from their homes. They have super computers at Goldman Sachs trading securities to create liquidity and give retirees a sense of hope that their retirements haven't been wiped out and of course IMHO Gold manipulation to help ease the fall of fiat money more gradually so that they can steal the saving of the responsible investors without them knowing what hit them.
With a company like SGR there are so many fundamental changes happening it is hard to use it as an example, However if you look at the POG today and the price of Goldcorp, then go back to May 29th the last time Goldcorp hit a high of $44.90 the POG was only $979.00 U.S. The C$ was actually lower at $0.92 so would have even been more favourable. Gold up almost 20% from May , yet Goldcorp is selling off. I think what that shows is that the markets are actually behaving more on the emotions of fear. Fear of fiat money at the same time as fear of a big market correction. Interesting times to say the least.