Every serious investor agrees you should stay informed. It sounds like diligence, the opposite of gambling. But somewhere along the way “stay informed” got quietly rewritten as “check often,” and the two are not the same discipline. Shlomo Benartzi and Richard Thaler, in their 1995 paper “Myopic Loss Aversion and the Equity Premium Puzzle,” showed that the second one has a price. The more frequently you evaluate a portfolio, the more risk you feel you are taking, and the worse the decisions you make about it. So the question worth asking isn’t whether to follow your investments. It’s how often. And the honest answer is: far less than the app wants you to.
Staying informed is not checking the ticker
There is a real difference between knowing what a business is doing and watching what its share price is doing. The first is signal: earnings, margins, debt, whether the company is still beating its peers. It changes a few times a year. The second is noise: the price tick, which changes by the second and answers mostly to mood and momentum. Kahneman, Sibony, and Sunstein draw exactly this line in their 2021 book Noise— signal is the thing you’re trying to read, noise is the random scatter on top of it. Checking daily doesn’t give you more signal. The fundamentals didn’t move. It just hands you a fresh dose of noise and dares you to treat it as news.
The trouble is that your brain can’t tell the two apart in the moment. A red number reads as a threat whether the business is deteriorating or the market simply sneezed. And threats, it turns out, are not weighted fairly.
Myopic loss aversion, defined
Here is the mechanism. Loss aversion is the well-documented finding, from Kahneman and Tversky, that losses hurt roughly twice as much as equivalent gains feel good. Drop $100 and the pain is about what gaining $200 would have soothed. Myopic loss aversion is what happens when you bolt that asymmetry onto a short evaluation window: every time you open the app, you re-experience the chance of a loss, and the 2-to-1 pain coefficient charges you for it again. Check once a year and you feel one outcome. Check every day and you feel hundreds, most of them small, each one taxed at the painful rate.
This isn’t armchair theory. In a 1997 experiment, Thaler, Tversky, Kahneman, and Schwartz had people make repeated investment choices under different feedback frequencies. The group that saw their results least often invested the most in the riskier, higher-returning asset and walked away with more money. The frequent-feedback group, rattled by every dip they were shown, pulled back into the safe option and earned less. Same assets, same odds. The only variable was how often they looked. Looking more made them poorer.
Almost half of all days are red
The reason daily checking is a losing game is baked into the arithmetic. Over the long run the U.S. market has finished higher on roughly 53% of trading days and lower on the other 47%. Stretch the window and the odds transform: zoom out to calendar years and stocks are up closer to three-quarters of the time, and over a decade the near-certainty is in your favor. But on any given day, you are flipping something barely better than a coin — and thanks to loss aversion, the down side of that coin lands twice as hard as the up side lifts.
So a daily checker volunteers for almost half their observations to be painful. Two hundred and fifty trading days a year, roughly 117 of them red, each one a small jab calibrated to feel worse than the green days feel good. Nothing about the underlying businesses required you to absorb any of that. You signed up for a stream of mostly meaningless losses and then, predictably, you reach for the sell button to make the discomfort stop. That is the whole cost, and it comes straight out of your returns.
The cadence the ranks are built for
The fix is not willpower; it’s design. If frequent looking is the problem, the structural answer is to look on a schedule tied to when real information actually arrives, not when the ticker twitches. This is one reason the Obermatt ranks update on a deliberate cadence rather than streaming a live price at you. A company’s standing against its true peers — whether it is still cheaper, still growing faster, still safer than the handful of rivals it competes with for capital — changes when the fundamentals change, not minute to minute. Check when the ranks refresh, and you are checking signal. Check between updates, and there is nothing new to learn, only noise to react to.
A quarterly rhythm also lines up with the discipline behind a margin of safety: you bought below what the business is worth precisely so you would not have to flinch at every wobble in the price. Daily checking undoes that on purpose, re-litigating a long-term decision against short-term static.
The principle is simple and a little counterintuitive: for a long-term investor, looking less is not laziness, it is risk management. A low check-frequency is a behavioral intervention you install once and benefit from forever. So here is the one concrete action — turn off push notifications and price alerts, and put a single recurring date on your calendar, quarterly, to review your holdings against their ranks. Between those dates, let the noise pass unread. The signal will wait for you, and it will be cheaper to hear when it does.