Expensive signals quality everywhere except here

This works through price as a signal of quality in the order the parts actually depend on each other.

A heuristic that usually works

For most goods, price correlates loosely with quality, and using it as a shortcut is a reasonable way to avoid endless comparison. The habit is deeply learned and applies automatically, including in places where it does not hold. A cheap fund therefore triggers a suspicion that something must be missing from it.

The suspicion is a transferred intuition rather than an observation about funds.

Why the relationship inverts

An investment charge is subtracted from whatever the underlying holdings deliver, so a higher charge starts from further behind. The manager has to outperform by more than the additional cost merely to match a cheaper alternative. Repeated analyses over long periods have generally found lower-cost funds outperforming higher-cost peers in the same category more often than not.

Put simply, that relationship is one of the more durable findings in the area, though it is a tendency rather than a rule.

What a higher charge can legitimately buy

Access to markets or strategies that are genuinely more expensive to run, or a service component beyond the investment itself. Those can be reasonable purchases when the thing being bought is identified and wanted. What a higher charge does not buy is a higher expected return, and no charging structure can promise one.

The distinction is between paying more for something specific and paying more for a general impression of quality.

Cheap is not the same as unsuitable

A low-cost broad fund is not a compromise product; it is a different business model with lower operating costs. Discomfort with that arises from the price heuristic rather than from anything about the fund. The relevant checks are what it holds, how it is structured and who runs it, not what it costs relative to peers.

Being cheap is a feature of the structure, not evidence of a hidden defect.

The mirror error

Choosing purely on cost can lead to unsuitable or obscure products, or to a provider without appropriate regulatory protection. Cost is a strong tie-breaker between comparable options, not a complete selection method.

Availability, protections and account types vary substantially by country and belong in the decision. The claim is that price is a poor quality signal here, not that it is the only thing that matters.

Testing your own reaction

If a cheaper option makes you uneasy, try to state what specifically is worse about it rather than accepting the feeling. Usually the answer is that it lacks a story rather than that it lacks a feature.

Where a genuine difference emerges, you have learned something worth acting on. Where none emerges, the discomfort was the heuristic and can be set aside.

The takeaway

Everywhere else, price hints at quality. Here it mostly tells you what you will definitely pay.

Pick the one that costs you least, and let the rest wait.