The process of intelligently building a portfolio consists of buying the best investments, making room for them by selling lesser ones, and staying clear of the worst. The raw materials for the process consist of (a) a list of potential investments, (b) estimates of their intrinsic value, (c) a sense for how their prices compare with their intrinsic value, and (d) an understanding of the risks involved in each, and of the effect their inclusion would have on the portfolio being assembled.
