The Sunday Edge · where the market sits, one stock spotlight, one principle.
Time is the only edge most investors have.
here is a short list of edges that work in public markets. Information edge: knowing something the market does not, which is mostly illegal for individuals and hard for everyone else. Process edge: a research workflow that surfaces what other people miss, which works but is expensive to build and run. Behavioral edge: the ability to sit through a 30% drawdown without selling. The first two are scarce. The third is available to anyone who decides to use it.
The edge that gets used the least is the one most investors already have: time. A 30 year horizon lets you compound through regimes the average professional cannot afford to wait out, because their performance is measured quarterly. You are not measured quarterly. That asymmetry is the most valuable thing on your side of the table. The model portfolios are built to be held the one way an individual can hold and a fund manager cannot, which is patiently. The patience is most of the work.
These gauges render live and will drift from reading to reading. That is by design. The scale is set by history rather than headlines, measured against many decades of market behavior, and the purpose is perspective, not prediction. A dial is a reference point. It is never an instruction.
Whatever the table shows at any given moment, the process behind it is the same. Positions are selected by discipline, held by rule, and adjusted only on scheduled rebalance dates. A stretch of performance, strong or weak, does not change any of that.
COSTCostco Wholesale Corporation
Most retailers compete on price and lose on margin. Costco competes on price and wins on margin, because the business model is upside down relative to the rest of retail.
Costco does not make its money selling you the rotisserie chicken or the toilet paper. It makes its money on the membership fee. The retail floor is a customer acquisition tool for the loyalty subscription. That distinction looks small on paper. It is enormous in the financials over time.
Membership fees run roughly $5 billion a year and convert to nearly 90% of operating income. Renewal rates have hovered around 90% for two decades, which puts Costco in the same retention tier as enterprise SaaS companies.
The merchandise gross margin is razor thin by design, typically capped at 11%, against 28% at Walmart and 35% at Target. The goal is to keep the deal so undeniably good that members never consider canceling. The cap is a strategic asset, not a constraint. Costco has turned a grocery store into a recurring revenue subscription business.
The compounding has held up across regimes: the 2008 recession, the 2020 shutdown, the 2022 inflation cycle. Members buy staples, the value proposition strengthens when consumers are stretched, and the renewal cycle absorbs short term cyclicality. That kind of resilience is not common.
Costco is not currently held in any of our models. It sits on the watchlist as a study in durable retail: the kind of loyalty economics the models are built to look for, worth understanding whether or not the discipline selects it in a given cycle. The risk worth naming is the multiple. The market has known this is a great business for a long time, and the price rarely offers a discount, which means an entry can absorb years of the very compounding it was meant to capture. A great business and a great stock are separate questions. The multiple is the distance between them.
“A 20% loss does not feel half as bad as a 40% loss. It feels twice as bad as a 20% gain feels good.”
Loss aversion, restated
Decades of research from Kahneman, Tversky, and the behavioral finance literature converge on a single finding. The psychological pain of losing a dollar is roughly twice the pleasure of gaining one.
That asymmetry is not a rounding error. It shapes nearly every consequential decision an investor makes during a drawdown.
Loss aversion is what makes people sell at the bottom, lock in losses they never recover, and refuse to redeploy capital after a panic. Investors who leave equities in a major drawdown and miss the recovery typically give up multiple percentage points a year against a passive index over a working lifetime.
The best defense we know is to take the decision out of your own hands. Predetermined rebalancing rules. Position sizes you can hold without losing sleep. Systems that do not reward heroic conviction in a crisis.
Process over feeling. Always.
Get the next one in your inbox.
The Sunday Edge lands every Sunday morning around 8:30 AM ET. Free. No urgency, no spam. Measured, useful.
Subscribe freeEducational research from Advising Alpha. We are a publisher under Section 202(a)(11)(D) of the Investment Advisers Act of 1940, not a registered investment adviser. Past performance does not guarantee future results. Full disclaimer at advisingalpha.com/disclaimer.