Harris James Associates, New York Portfolio Management

Once this process is completed and the investor has defined the key drivers, he can thing bring about diversifying the portfolio. For example, a properly diversified portfolio will not be overweight in one sector or theme. So if an investor finds that he is overweight in stocks benefiting from rising oil prices, then he should look to buy companies that are positively exposed to falling oil prices. For example, plastics manufacturers or data centre operators.