Portfolio drift
What portfolio drift is, why it creates compliance and suitability risk, and why daily monitoring beats quarterly reviews.
Definition
Portfolio drift —
The gradual divergence of a portfolio's actual asset allocation from its target allocation, caused by differing returns across holdings. Left unchecked, drift pushes a portfolio outside the ranges set in the client's Investment Policy Statement.
If equities run hot for two quarters, a portfolio targeted at 55% equity can quietly become 65% equity — a different risk profile than the client agreed to, without anyone making a decision.
Why it's a compliance issue, not just a performance one
Drift isn't only about returns. When a portfolio breaches the bands in its IPS, the holdings may no longer match the client's documented risk tolerance — a suitability problem. The longer it goes unnoticed, the harder it is to explain.
Why timing matters
The traditional cadence is the quarterly or annual review — which means drift can persist for months before anyone catches it. Continuous monitoring flips this: a signal fires the day a position breaches its band, while it's still a small, easy correction.
That's how AdvisorIQ treats drift — as a monitored signal tied to each household's IPS, not a number you rediscover at review time.
Related
Keep reading
All glossary →Investment Policy Statement (IPS)
What an Investment Policy Statement is, what it contains, and why it's the reference point for monitoring portfolio drift and suitability.
Suitability
What suitability means for financial advisors, how it relates to the IPS and fiduciary duty, and what a suitability gap is.
Audit trail
What an audit trail is in an advisory context, why books-and-records rules require one, and what makes a research audit trail defensible.