The ESG Trust Gap That Doesn't Show Up in Performance Reports

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Many ESG advisors can explain what’s driving their clients’ performance, but they stop short of detailing why. When an advisor fails to reveal the reasoning behind a strategy, that’s when a client loses trust — and how accounts are ultimately lost.

I spent over 20 years in investment communications watching the same pattern repeat. A gap often exists between how well an advisor understands their strategy and how well the client does. Unfortunately, that gap often stays invisible until it’s too late.

The Call That Revealed the Gap Too Late

A client (let’s call him Adam) was watching the market closely one quarter and saw that the S&P 500 was up 12%.However, his ESG portfolio was only up 10%. The mismatch prompted a call to his advisor, who accurately explained what was happening: The screening strategy excluded fossil fuels, tobacco, and weapons manufacturers, which created an expected deviation from the broad market. In fact, Adam’s portfolio was performing well against the benchmark they’d set during onboarding.

Adam heard the words, but kept circling back to one question: Why am I not beating the S&P 500? The advisor walked through the exclusions again, this time detailing why comparing Adam’s portfolio to the S&P was like comparing apples to oranges. Adam listened and understood what the advisor was explaining, but the concept wasn’t resonating.

Three weeks later, Adam moved his account.

The advisor’s explanation was accurate, and Adam never questioned their expertise. The missing piece was a version of the reasoning that made deviation feel like the strategy was working, not failing.

Why ESG Advisors Are Uniquely Exposed

CapIntel’s 2025 Investor Engagement Survey of 1,000 investors found that 72% ranked “someone I can trust” as the most important quality in an advisor. Additionally, 61% said loss of trust, not poor performance, was the top reason they would seek a replacement. By comparison, 54% would leave over disappointing returns, and 46% would leave over unclear communication.

As more investors bring values-based mandates into the relationship, this trust dynamic becomes structurally important. Tracking error, a statistic measuring how far a portfolio’s return deviates from its benchmark, is a defining feature of many ESG portfolios. Every deliberate decision to align holdings with a client’s values increases tracking error, and that deviation only feels acceptable when the client trusts why it’s happening.

What looks like underperformance against a benchmark isn’t a failure of the strategy; it’s a mandate working as designed, provided the trust foundation is intact.

That’s the burden ESG advisors carry that traditional advisors often don’t. Values‑driven mandates require ongoing explanations of trade‑offs, omissions, and substitutions, and each one either strengthens or erodes trust.

If a client perceives that an advisor is quietly reshaping their valuesdriven objectives, it’s experienced as a violation of trust, not a technical disagreement. CapIntel’s data suggest most investors won’t tolerate that for long. Advisors don’t realize they’re carrying this burden until a client questions a number and finds that the explanation doesn’t help them make sense of what they’re seeing.

What breaks trust in those moments is the perspective the explanations come from, not how often they occur.

The Real Problem Is Orientation, Not Explanation

Adam’s advisor didn’t have a quantity problem. Tracking error was covered at onboarding and explained again during the call. Adam heard it more than once.

The problem was orientation. Each explanation described what the strategy did. None made the advisor’s reasoning legible. What was missing was why the deviation Adam saw was evidence the strategy was doing its job, expressed in a way he could repeat to himself when the next period of underperformance arrived.

The distance between an advisor's methodology sophistication and the client's ability to understand and defend it is what I call the credibility gap. It doesn’t close with more explanations of what the strategy does. Re-explaining capabilities to a client who has already lost confidence in you just confirms the distance. The gap only closes when communication shifts from describing what you do to demonstrating how you think.

Where ESG Advisors Are Vulnerable — and How to Close the Gap

There are three decision points where ESG client trust is either strengthened or weakened:

Onboarding: This is where most gaps begin. As you document the strategy, provide the reasoning a client can return to: Why certain securities are excluded, what trade-offs against the market are being accepted, and what the strategy looks like when it inevitably diverges from the benchmark. When reasoning is in writing and aligned with the client’s value language, it becomes a reference rather than a memory.
Benchmark framing: Give your client the benchmark that actually aligns with their portfolio and the reason it’s the right choice. The S&P 500 might be the client’s default, but a client who understands why their portfolio is built to diverge won’t panic when it does.
Review communication: “Accurate but late” does the most damage to the trust relationship because by the time you’re answering a worried question, doubt has set in. Narrate the why proactively, having already framed benchmark deviation at an earlier decision point. An explanation that fosters trust is the one that’s delivered before it’s needed.

If you’re concerned this approach crosses into revealing proprietary processes, ask yourself one question: Could a competitor read what you want to share with your client and rebuild your proprietary process from it?

If the answer is no, you’re revealing reasoning that builds trust without giving away anything proprietary. If it’s yes, pull back to where implementation stays hidden. Your thinking can remain visible without exposing proprietary mechanics.

The Questions Worth Asking About Your Own Book

If your clients don’t understand why deviation from the market isn’t a problem, or if they go quiet instead of asking informed questions during reviews, a credibility gap already exists. In a quarter when the market pulls ahead, a client who understood every word still won’t find a reason to stay.

Adam understood the strategy. What he never got was a reason to trust it through a hard quarter. You can build the reasoning, but only if you decide the client's understanding is part of the strategy, not an afterthought.

Lisa Marie Harast, CIPM® is the founder of The Write Investment, a strategic content consultancy specializing in sustainable finance communications. With over 20 years in investment communications and a CIPM from the CFA Institute, she helps sustainable finance firms close the credibility gap between rigorous methodology and clear, defensible communication.

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