Ask most financial planners what makes a client relationship strong and they will describe consistency: regular contact, sound advice, no unpleasant surprises. What they less often describe is what makes a relationship memorable. Those are not the same question, and the gap between them is larger than it might appear. The clearest illustration I know, though, comes from a bar, not a planning meeting.
A while ago, my husband and I went to a bar — beautiful place, cocktail-specialist, appropriately overpriced. We liked none of the drinks, which was a mild disappointment, though not one we voiced. We noted it quietly and asked for the bill.
Before it arrived, the maître d' came over and asked about the evening. We were honest: lovely, just not quite our taste. She asked what we usually drink, we told her negronis, and we had a quick laugh about how a good negroni is harder to make than it looks.
The bill came. With it: two small negronis, poured into Japanese-style cups. No announcement, no theatre. Just a few sips of a really good negroni.
What makes the story stick isn't the negroni. It's the structure of the experience: an evening that was quietly not quite right, resolved at the last moment by something that acknowledged exactly that. The memory didn't form despite the mild disappointment — it formed because of it. And that structure, it turns out, has a direct parallel in how clients remember long-term professional relationships.
The implications for financial planning are three-fold: the rule is only half-remembered; a negative peak can outperform a smooth relationship; and the annual review might be a memory event just as much as it is a reporting one.
The rule most people half-remember
Daniel Kahneman and colleagues demonstrated something counterintuitive about how people remember experiences: overall duration has almost no bearing on how an experience is recalled. What drives the memory are two moments — the emotional peak, wherever intensity was highest, and the end. Everything in between contributes surprisingly little.[^Kahneman, D., Fredrickson, B. L., Schreiber, C. A., & Redelmeier, D. A. (1993). When more pain is preferred to less: Adding a better end. Psychological Science, 4(6), 401–405.]
This finding has been absorbed into professional services folklore as a prompt to design better endings: send the thoughtful letter, make the annual review feel like a milestone, ensure the final impression is warm. The advice isn't wrong, but it is a partial reading, one that drops the first half of the rule and with it the more interesting implication.
The peak matters at least as much as the end. And in financial planning, the peak is not always the moment the adviser would choose.
What the research actually predicts
Consider a client who has worked with an adviser for six years. The relationship has been, by any measure, excellent. Objectives were set clearly. Reviews happened on schedule. Recommendations were sound, explained well and followed through. Nothing went wrong. The client, if asked, would say they were satisfied.
But satisfied is not the same as memorable. A uniformly pleasant experience, with no moment of particular emotional intensity, produces a weak memory trace. The peak-end rule predicts this precisely: without a peak, the encoding is flat. The experience registers as fine, which is a surprisingly fragile foundation for a long-term relationship or enthusiastic introductions.
This is the mechanism behind something many advisers will recognise but rarely name: the clients who seem most appreciative in the room but prove hardest to retain, least likely to refer and most susceptible to a competitor's approach. Not because the advice was poor. Because the relationship may not have acquired enough texture to feel irreplaceable. Smooth, in other words, is not safe. It is forgettable. The following case helps illustrate the point.
What a negative peak, handled well, actually produces
In March 2020, a client called her adviser the morning after markets had fallen sharply. She had been invested for eleven years, had seen two corrections before and had always, in principle, understood that volatility was part of the arrangement. This time felt different, though, as it did for millions of people like her and most of the adviser's clients. She told him she wanted to move everything to cash. Predictable. She wasn't asking for reassurance. She was telling him what she wanted to do.
He didn't talk her out of it immediately. He acknowledged what she was describing: not the market movement, but the feeling of watching something real and personal become uncertain. He asked her what she was most worried about. Not the portfolio. Her feelings. They talked for forty minutes and not once did he reach for the historical recovery argument or the cost of missing the ten best days. By the end she hadn't changed her position entirely, but she had separated what she was genuinely afraid of from what the market was doing, and she decided to wait.
She stayed invested. Markets recovered. But that isn't what she remembers, or at least it isn't all she remembers. What she remembers is the forty-minute call and the conversation that wasn't about the numbers.
The experience had a negative peak — genuine anxiety, real uncertainty and a moment where the entire plan felt precarious. And it was handled in a way that made the peak, and the resolution of it, the emotional centre of the relationship. Years of smooth reviews became, in retrospect, the context for that one conversation.
The bar story has the same structure. A mild negative peak met with something that acknowledged it directly and resolved without performance. The memory didn't form despite the disappointment; the disappointment was the necessary condition for the memory to form at all.
The annual review as a memory event
If the peak-end rule is a theory of memory rather than experience, it has an implication that goes beyond touchpoint design. Clients aren't evaluating the relationship in real time and averaging across it. They are constructing a narrative retrospectively, and the peak and end are the anchors that narrative organises itself around.
The standard framing treats the annual review as a reporting event: progress against objectives, portfolio performance any changes to circumstances or goals. That framing isn't wrong, but it misses what else is happening in the room. The annual review is also the moment where the previous year's experience gets encoded and where scattered interactions, decisions made under pressure, moments of uncertainty and resolution, acquire their retrospective shape.
How the adviser narrates that year determines, in part, how the client will remember it. Not whether performance was communicated accurately, but which moments were surfaced, what they were connected to and whether the difficult ones were named or passed over. A review that moves efficiently through the agenda leaves the encoding to chance. One that pauses to say 'that call in March was a hard moment, and here's what it meant for where we ended up' is doing something structurally different. It is placing the peak deliberately in the narrative and giving it a resolution.
This is a skill that doesn't appear in most adviser training because it isn't obviously a financial skill. But memory is the medium through which clients experience the value of a long-term relationship. And memory, it turns out, is not a passive record. It is something constructed, and the construction happens somewhere, most likely in the annual review, whether or not anyone is paying attention to it.
