Mutsy- I wanted to say that the same relationship can be found between the stock market and the stock market price of a particular stock.
If there is generally positive information regarding a company more people will be prone to buy that stock.
This drives the market price stock up which makes it more expensive to purchase because of the reduced shares in circulation.
The flip side is also true. If there is adverse information regarding the company, many stockholders of that company's stock may choose to sell the stock causing the price of the stock to decrease.
For example if a company is rumored to have financial problems and considering bankruptcy the stock price of that company will shortly plummet.