It is Sunday night and the phone lights up with the week in review. Your KiwiSaver is down. Not by much, and not for any reason you chose: a single company you have never heard of had a bad week, and because it is one of the largest things the fund holds, the whole balance sagged with it. The note is calm and well made. It tells you exactly what happened, which is the entire point of the service. And sitting there, knowing more than you did a minute ago, you feel your thumb drift toward the button that moves the money somewhere it cannot fall. This is the app working. It is also the app failing, and the two are the same event.
The blindness the app was built to cure
The case for the service is one I have made myself, and I still believe most of it. Passive investing handed millions of people ownership of the whole market and, in the same motion, took away any sense of what they held. You own a slice of thousands of companies (Simplicity’s growth fund alone reports over 4,000 investments in more than 20 countries) and you could not name five of them. (Simplicity 2026) Neither could I, and we are the owners.
Not knowing was supposed to be the point. You are not meant to pick stocks or follow earnings calls; you buy the whole market, cheaply, and get on with your life, and decades of evidence say this beats almost everyone who tries to be clever. (S&P Dow Jones Indices 2026) That is the deal, and it is a good deal. But it smuggles two different things into one sentence. There is a real difference between being relieved of a decision and being kept in the dark. Passive investing solved the decision brilliantly and, as a side effect nobody chose, severed the relationship entirely. The severing has costs that have nothing to do with returns. A holding can crater on real news and reach you as a slightly smaller number with no story attached. You might own a slice of a company doing something you would rather not back, and never know. You can decline to act on information and still very much want to have it.
The missing piece is not advice. Advice is regulated, fraught, and mostly not what people need; New Zealand law draws a hard line between telling a person what their money did and telling them what to do about it. (New Zealand Government 2013) The missing piece is comms, the plainest thing in the world: the story of your money, told as it happens. This company you own reported earnings. This holding fell on a piece of news, here is the news. This is why the number moved this week. Not a recommendation, not a nudge to trade, just the running narrative of what the things you already own are actually doing, in language a person can follow. An app that breaks the silence this way is doing something humane: it turns a mute balance back into a set of real businesses you have a stake in. Ending that blindness is a good in itself, whatever it does to returns. I am not going to argue against knowing what you own.
But there is a difference between knowing what you own and being shown it every week, and a finding from 1995 sits exactly on that difference.
The dial nobody had priced
In 1995 Shlomo Benartzi and Richard Thaler put a name to the trap. (Shlomo Benartzi and Richard H. Thaler 1995) A loss hurts roughly twice as much as the same-sized gain feels good; that asymmetry on its own is old news, and survivable. What they showed is that it compounds with a second dial: how often you evaluate. The more often you mark your money to market, the more separate losses you are present for, and the more risk-averse you become, until you are frightened of an asset that has done nothing wrong. They called it myopic loss aversion, and it is strong enough to help explain why people hold far less in shares than the long-run returns say they should.
A weekly explainer is, whatever else it is, a machine for raising evaluation frequency. It takes a number that a sensible passive investor should look at roughly never and puts it in front of them 52 times a year, each time with a reason attached that makes the dip feel specific and real. The reason is accurate. That is what makes it dangerous. An unexplained fall is easy to shrug off; a fall with a story, this company missed earnings, this sector turned, is the kind you act on. The app set out to convert a mute number into understanding, and understanding, delivered weekly to a loss-averse mind, is hard to tell apart from a prompt to sell.
Selling is the one thing the passive investor must not do. The whole case for the cheap index fund rests on staying in it: S&P’s SPIVA scorecard has shown, edition after edition, that a fund tracking the American market beat around 84% of the professional funds trying to outdo it over a decade. (S&P Dow Jones Indices 2026) The saver who panics out on a red week is not trading up. They are abandoning the one strategy that reliably beats the experts, to escape a feeling the app just handed them.
The people who know markets best look less
The strange confirmation is that the practitioners who understand markets most deeply prescribe the opposite of a weekly briefing. Jason Zweig, who has written a behavioural-finance column for decades, gives the standing advice that the less often you look at your portfolio, the less volatile it will seem, and the less you will be tempted to touch it. Ben Carlson, answering a reader in 2026 who confessed to checking his account every day, was blunter: constant checking, he argued, is no way to run a long-term strategy. (Ben Carlson 2026) These are not people who think savers should be kept in the dark. They are people who have watched, up close, what happens to a saver who is shown every tremor, and their prescription is distance.
That is the honest counter to the whole premise, and it is made by the people best placed to make it. A service whose founding pitch is explain more is arguing against Zweig, against Carlson, against the finding underneath them both. The rebuttal, if there is one, is that comms are not prices: you can tell someone the story of the businesses they own without ever showing them a running tally of their losses. Maybe. But a weekly cadence is a weekly cadence, and the mind does not neatly separate the story from the number it arrives beside.
What a kinder service would withhold
Which leaves a service built to explain your money with an uncomfortable design problem. A saver can own a thousand companies, understand every one of them, and still be ruined by being shown the total too often. The fix is not to go back to the silence: the silence was a real harm, the one the whole idea exists to answer. The fix is to notice that information and frequency are separable, and that the discipline a passive investor most needs is not more of the first but far less of the second. You can tell someone, now and then, the story of the companies they own, framed the way Morgan Housel frames a drawdown, as the fee you pay for long-run returns rather than a fine for a mistake, without handing them a weekly ledger of their fluctuations to stew over. (Morgan Housel 2020) What you withhold, and when, turns out to be as much of the product as what you show.