Help pls !

What are some reasons why a stock price can be overvalued or undervalued? Do you think that it's always the "fundamentals" (accounting information) that drives a stock price? If not, what are some other factors that drive stock price? Also, please mention one company (and its stock price) that you believe is overvalued, undervalued, or fairly valued. Why do you believe that this is the case? If you are having trouble finding a stock, you can go to finance.yahoo.com and select "Industries." When you examine certain stocks, check the PE Ratio and see whether the firm pays a dividend or not