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Glossary

What is portfolio drift?

Portfolio drift refers to the gradual shift in an investor’s asset allocation as certain holdings change in value or liquidity over time. In private markets, this often happens as late-stage or pre-IPO investments appreciate, extend their timelines or undergo secondary transactions, causing them to occupy a larger share of an investor’s portfolio than originally intended. Portfolio drift can create unintended concentration risk or misalignment with an investor’s strategy. Managing portfolio drift involves periodically reassessing valuations, liquidity horizons, and exposure to private companies to maintain a balanced, goal-aligned allocation.

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