Transitioning Concentrated Positions Doesn’t Have to Be All or Nothing

transitioning-portfolios

Investors worried about highly appreciated stock positions and the related capital gains exposure may avoid transitioning concentrated portfolios to more diversified tax-managed solutions. In our view, a multiphase transition may enable them to strike a balance between how fast concentration risk is diversified and the size of their annual tax bill.

Here’s the conundrum with highly appreciated securities: A high-flying stock may feel like a lottery winner, but the prize could vanish if the company falls on hard times, which makes reducing concentration a sound idea. But if the stock’s price is far above its cost basis, selling in one fell swoop could bring a sizable tax bill. Behavioral biases are in play, too; it can be hard to convince investors to diversify away from a successful position and take a painful tax hit—even if reducing risk is the goal.

See more: Model Portfolios Gain Momentum in 2026: How ETFs Fit In

From Concentration to a Multiphase Transition Plan

A multiphase transition offers an alternative by gradually diversifying concentrated positions, while managing taxes and reducing concentration risk over time.

Before any transition, it’s critical to evaluate what investors own in their portfolios today—especially how much profit is built into portfolio holdings, how concentrated the portfolio is in a few stocks and its tracking error versus the desired market benchmark.

Evaluating the transition over several different timelines, it’s possible to estimate and compare how much taxable gain an investor would need to realize each year depending on the length of the transition. This annual “gain budget” acts like a spending limit for taxes. It sets the amount of gain that can be realized each year as concentrated positions are gradually sold down and the portfolio moves closer to the targeted mix.

The objective with a multiphase transition is to reduce overconcentration in individual stocks without triggering a bigger tax bill than a client wants. Investors who are very tax-sensitive may own stocks that have built up big gains over the years. They could hold inherited positions or concentrated securities from compensation plans. The tax implications matter, but so does the risk of waiting to diversify.