The stock market works like an auction, and buyers and sellers can be individuals, corporations, or governments. When there are more sellers than buyers, the price of a stock will go down. When there are more buyers than sellers, the price will go up. A company's performance doesn't directly influence its stock price; it's investors' reaction to the performance that decides how the stock fluctuates. If a company is performing well, more people will want to own the stock—consequently driving the price up. The opposite is true when a company underperforms.
You’ll come across an overwhelming amount of information as you screen potential business partners. But it’s easier to home in on the right stuff when wearing a “business buyer” hat. You want to know how this company operates, its place in the overall industry, its competitors, its long-term prospects and whether it brings something new to the portfolio of businesses you already own.