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Q&A: What you can expect from a fiduciary advisor

March 30, 2026 By Liz Weston Leave a Comment

Dear Liz: This is concerning the couple in their 70s who were persuaded to move their nearly $2-million retirement portfolio to a different broker, resulting in a capital gain of $184,000 and a capital gain tax bill for $50,000.

The question I wonder is whether the $184,000 capital gain also kicked them into a higher Medicare premium bracket (which you frequently warn your readers about) or whether they were already in the higher bracket for other reasons (i.e. the amount of their annual required minimum distribution, plus the size of their Social Security or pension benefits).

The problem with their new broker is that this couple seem surprised to learn they would have a capital gain and a sizable capital gain tax bill by transferring their portfolio from their existing broker to the new broker. Shouldn’t the new broker, with its “fiduciary” duty, have warned them that they would incur a huge capital gain and a sizable capital gain tax bill and also checked to see what the influence of the capital gain would be on this couple’s Medicare premium (if any)?

Answer: The couple did not say they were surprised by the tax bill. They said their accountant was not pleased, which apparently caused them to question their decision.

Let’s define some terms. “Broker” in this context typically refers to a stockbroker. Stockbrokers normally aren’t fiduciaries, meaning they’re not required to put their clients’ best interests first. Instead, stockbrokers are usually held to a lower “suitability” standard, which means they can recommend investments that aren’t the best option for their clients as long as those investments aren’t actually unsuitable.

Registered investment advisors, on the other hand, are fiduciaries. This couple’s new RIA should have explained why the investment sales were necessary and detailed the costs, including the tax bill and any affect on Medicare premiums. The RIA should have explored other options as well, such as leaving the portfolio alone or extending the investment sales over multiple years. The RIA would have recommended a course of action, but would execute whatever plan the couple ultimately chose.

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Filed Under: Investing, Medicare, Q&A, Taxes Tagged With: fiduciaries, fiduciary, fiduciary advice, fiduciary advisor, fiduciary duty

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