This guide to the stockmarket offers principles proven by the success of investors for over 35 years. Its main objective in its philosophy of "value investing" is to protect the investor against the areas of possible error and to develop policies which are rational. It takes account of both the defensive and enterprising investor, outlining the principles of stock selection for each, and stressing the advantages of a simple portfolio policy. It features the use of comparisons of pairs of common stocks to bring out their elements of strength and weakness, and also the construction of investment portfolios designed to meet specific requirements of quality and price attractiveness.