ARSENAL > Concentration risk

Concentration risk

Investing
Definition
Risk arising from over-exposure to a single stock, sector, geography, or factor. Most single-stock blow-ups (Enron, Lehman, FTX) hit employees with concentrated holdings hardest.

Standard mitigation: rule-of-thumb caps on single-position weight (5-10%), sector caps (25%), industry caps. Many wealth managers offer "exchange funds" to swap concentrated stock for diversified portfolios with deferred capital gains.
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