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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →To diversify a portfolio that includes individual stocks, spread stock investments across different companies and sectors, then consider how stocks fit alongside bonds, cash, and other assets in light of your goal, time horizon, and risk tolerance. Diversification can reduce dependence on any one investment, but it cannot prevent losses when markets fall.
What diversification does—and does not do
Diversification means spreading investments so the portfolio is not overly dependent on one company, industry, or asset category. It is a way to manage concentration risk, not a promise of gains or a shield from every decline. The U.S. Securities and Exchange Commission (SEC) explains that “Diversification can’t guarantee that your investments won’t suffer if the market drops” (Investor.gov: Diversify Your Investments).
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Spread individual-stock exposure across companies and sectors
Owning several stocks is not enough if they depend on similar business conditions. Companies in the same industry may face common pressures, so a setback affecting that sector can weigh on multiple holdings at once. Consider whether your stocks span different companies and industries, and whether a single issuer or sector accounts for an outsized share of the stock allocation.
The SEC’s Beginners’ Guide to Asset Allocation, Diversification, and Rebalancing says four or five individual stocks do not make the stock portion of a portfolio diversified, and that at least a dozen carefully selected individual stocks are needed to be truly diversified. Treat that as guidance from the SEC guide—not a guarantee, a universal threshold, or a personalized stock-count rule. The number alone cannot tell you whether holdings are concentrated in similar businesses or risks.
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Choose an overall asset mix that fits your circumstances
Stock diversification addresses only the stock allocation. A portfolio can also combine stocks with bonds, cash, and other asset categories, as appropriate for the investor. The appropriate mix depends on the investment goal, time horizon, risk tolerance, and personal financial situation; there is no single allocation that suits everyone.
When comparing investments or categories, consider their risk and potential return, costs, diversification, and liquidity. The SEC identifies these as factors to weigh when assessing investment products (Investor.gov: Investment Products). A longer or shorter horizon and your ability to tolerate fluctuations can affect which mix is suitable, but these factors do not establish a specific allocation for you.
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Use funds carefully to broaden exposure
Mutual funds and exchange-traded funds (ETFs) can make it easier to hold a broad range of investments. But a fund’s label or large number of holdings does not guarantee broad diversification: a sector-focused fund may concentrate exposure, and several funds may own many of the same companies.
Before adding a fund, inspect its holdings, sector focus, and overlap with your existing stocks and funds. The SEC’s Asset Allocation and Diversification guidance discusses how diversification applies across and within asset categories. Look through to what a fund owns rather than counting each fund as a separate source of exposure.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Review holdings and rebalance when needed
- List your investments and weights. Record each stock, fund, and other investment, along with the percentage of the portfolio it represents.
- Check issuer and sector concentration. Look for a large position in one company or industry, including exposure held indirectly through funds.
- Check fund overlap. Compare fund holdings and sector exposures with one another and with your direct stock positions.
- Compare the actual asset mix with your intended mix. Review how much is in stocks, bonds, cash, and other categories against the allocation that fits your goals and risk tolerance.
- Decide whether to rebalance. If the mix has drifted from your intended risk level, you could sell overweight investments, buy underweight ones, or direct new contributions toward underweights. The SEC guide describes these approaches, but does not establish a universal rebalancing schedule.
Selling investments can involve transaction fees and tax consequences. The impact depends on your account and circumstances, so consider those costs before trading. For personal tax or investment questions, consult a qualified financial or tax professional.
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