Why is it that some people only buy one or two stocks? Others may have 15 stocks but have 50 percent of their investment assets in just one of those 15 stocks. In Wall Street we refer to this type of behavior as concentration. Some firms call it over-concentration. When this happens in a brokerage firm it is always considered dangerous. It is so dangerous, in fact, that if the brokerage firm is using a concentrated stock position as capital, then the market value of the security in question is given a haircut. This means that the full market value of the security is chopped by some fixed percentage in any capital computation. In other words, if you are over-concentrated, you don’t get full value. Some of you may have margin accounts. As you know, StocksAtBottom.com advocates cash ownership of stocks. If you own stocks on margin, it is our opinion that you will get sold out on margin. Normally in a margin account you put up 50 percent of the value of the stock you acquire in cash. If equity falls below 35 percent, you get a margin call. Now, brokerage firms love it when clients have 15 or 20 different stocks in a margin account. If there are some bonds in that account, guess what, they love it even more. Why? Because brokerage firms know that stocks represent risky investments. Something can always go wrong in any one situation. Maybe something can go wrong in any two situations. It’s tough to see something go wrong in 15 situations. That is the essence of diversification. SPREAD THE RISK AROUND. It makes a lot of sense. Some investors own 50 to 100 stocks. This is because they think they need that many to achieve the investment goals that they set out for themselves. In business school at a master’s degree level they teach you that to achieve true diversification you need to own something approaching 14 equity positions. It has been the experience of StocksAtBottom.com that 6 to 10 different equity positions is sufficient to achieve diversification. The one thing we know for sure is that it’s not one stock or two stocks. Own one or two and you get killed.
Putting all your eggs in one basket We advise all investors to own several stocks and to own more than one sector. Own more than one type of investment (that means equities, bonds, real estate, cash, you get the picture) or you will have problems. Sectors refer to stocks with broad themes. Examples are:
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