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Concept

Diversification

Diversification is spreading your money across many investments that do not all depend on the same thing, so that no single failure can do serious damage to the whole.

Any one company can collapse for reasons nobody saw coming: a fraud, a lost lawsuit, a product that suddenly stops selling. You cannot predict which company it will be. So you arrange your money so that it doesn't matter much when it happens. That is the whole idea. Benjamin Graham told the defensive investor to hold somewhere between ten and thirty large, financially sound companies. Each one was not a sure thing. The point was that a mistake in one would stay small next to the rest. The catch is that diversification is about what drives your holdings, not how many you own. Ten bank stocks are closer to one bet than to ten. Real spread means different industries, often different asset types, and sometimes different countries. It won't make you rich faster. It lowers the odds of the one loss you can't recover from, and that is what lets compounding keep working.

A real-life example

Dana, a pharmacist, put all her savings into three software companies whose products she used and admired. When rising interest rates hit the sector, all three fell together. Her portfolio lost almost half its value in a year. Nothing was wrong with the businesses. They simply shared one weakness. She moved most of the money into a broad index fund and kept a small stake in her favourite. The next sector slump cost her a few percent, not half.

How to use it

  1. 1List what each holding depends on: its industry, interest rates, one country's economy, even your own employer. If the same answer keeps repeating, you are less spread out than you think.
  2. 2If you pick stocks yourself, follow Graham's guide of roughly ten to thirty sound companies across different industries. If you'd rather not, a low-cost broad index fund does the spreading for you.
  3. 3Cap any single company at a share of your savings you could lose without changing your life. That includes the company you work for. Many investors set the cap at 5–10%.