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What Is Diversification?

Diversification means spreading your money across many different investments, so one bad one cannot ruin you. It is the old advice: don't put all your eggs in one basket.

Why diversification lowers risk

If you own one company and it fails, you lose everything. If you own 100 companies and one fails, you lose 1%. Different businesses rarely all have bad news at the same time, so the ups and downs partly cancel out. That lowers volatility.

How to diversify

The easy way

One index fund or ETF can hold hundreds of companies at once. An S&P 500 fund, for example, spreads your money over about 500 large US companies.

Can you diversify too much?

Yes. Owning many funds that hold the same companies is not real diversification. And spreading too thin means a great pick barely moves your result. Most people do well with a few broad funds.

Related terms

Index fundA fund that copies a market index. ETFOne fund that holds many stocks at once. S&P 500500 large US companies in one index. VolatilityHow much and how fast a price moves. Dollar-cost averagingInvesting the same amount on a regular schedule. Bear marketA drop of 20% or more from the top.

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