The first thing that Warren Buffet would like to tell you is to treat a stock not just as a piece of paper but as your fractional share in a business. Hence, he would also request you to not only look for information on the stock but also on the business related to the same. If you look into the same separately, you may not be able to assess the worth of any stock. However, if you are able to appraise the business that the stock represents in entirety, you may quite easily determine the worth of any stock. You may then find out the value of each stock just by dividing the total worth of the business by the number of stocks issued by that company.