Question

How much of my portfolio is too much in one stock?

Answer

While every situation is different, many advisors flag risk when a single position makes up more than 10–15% of your total portfolio. Holding too much of one stock can expose your financial goals to volatility, tax surprises, and missed opportunities to diversify. 

Last Updated May 14, 2026

About Mercer Advisors

We exist so you don’t have to worry about money. For more than 40 years, we’ve taken the sophisticated, time-tested approach that many ultra-high net worth individuals use to help manage their financial lives and made it accessible to more families.

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