Return Is Not Everything: How to Read a Number Before You Trust It
By Diego Alcalá There is a question all of us ask first when someone brings us an investment opportunity: "how much does it pay?" It sounds reasonable. It is di
By Buying America Editorial · Mon Aug 03 2026 · Investing
By Diego Alcalá
There is a question all of us ask first when someone brings us an investment opportunity: "how much does it pay?" It sounds reasonable. It is direct, it is practical, it seems like the question of someone who knows what they want. Having said all that, I think it is one of the worst ways to begin. Because a return, stated on its own, is a number without context, and numbers without context are precisely the ones that fool us most.
When someone tells me an investment "pays 20% a year," my first reaction is a list of questions: 20% compared to what? In exchange for how much risk? Is that 20% what the brochure promises, or what actually ends up in my pocket? A return is not a fact, it is the ending of a story almost nobody bothers to tell in full, and that even fewer people take the trouble to understand.
This matters just as much if you are investing into the United States from outside it. If you are evaluating a U.S. opportunity from Canada or from Latin America, you are usually seeing the number first and the structure last — the fee layer, the tax treatment, the currency, the liquidity terms, the exit. The headline return is the part that travels easily across a border. Everything that explains it is the part that does not.
Three different things we call "return"
When we talk about "return" we are actually mixing three different things that are worth separating.
- Projected return. This is the one that shows up in the presentations, the one drawn for you on a chart that climbs to the right. It is a promise, not a fact.
- Risk-adjusted return. This is where it gets serious. Earning 15% while taking little risk is not the same as earning 15% betting on something that could have cost you half your capital. William Sharpe built an entire career around the idea that what matters is not how much you earn, but how much you earn for each unit of risk you tolerate. Two investments with the same return can be radically different if one let you sleep peacefully and the other took you to the edge of a heart attack.
- The return you actually receive, which is the one almost nobody measures. Between the number in the brochure and the money that reaches your account there is a line of outstretched hands. Fees, taxes, inflation and — the most expensive of all — your own decisions. Carl Richards calls it "the behavior gap," the difference between what an asset returns and what the average investor actually gets, because they get in late, sell in fear and chase whatever already went up. That index you love to show off because you think you are an AI insider may return 20% this year, but if you bought high and sold low, your real return was something else entirely.
I have already shown in another analysis how the arithmetic of risk distorts averages: a year of +50% followed by a year of −50% does not leave you at zero, it leaves you 25% down. The "average" return can be a comforting fiction. What compounds your wealth is not the average, it is the actual sequence of what happened.
Projections are narrative, not prophecy
This brings me to projections, that literary genre disguised as mathematics. I am not against them; they are necessary for planning, for comparing scenarios, for having a compass. The problem is confusing the map with the territory.
"The only function of economic forecasting is to make astrology look respectable."
Every projection is a story we tell about the future using data from the past. It is useful as long as the future resembles the past. It stops being useful precisely in the moments that matter most, which are the crises, the breaking points, the swans that were not in the model.
A well-made projection is not the one that gets it right — none gets it right always — but the one that is honest about its assumptions. When someone shows you a single ascending line, with no error range, no bad scenario, no "what if I am wrong," they are not showing you an analysis, they are selling you a narrative they probably will not be able to deliver.
When a high return is a reward, and when it is an alarm
And here we arrive at the most counterintuitive part. We were taught that greater risk implies greater return, and that is true as a general principle. A high return can legitimately be the reward for having tolerated an uncertainty that others did not want. That is fine. That is investing.
But there is a point where a high return stops being a reward and becomes a warning sign. When? When it is too high, too steady and too easy to explain. The nature of risk is volatility; an elevated return that never drops, that yields the same in good years and bad ones, that seems immune to the cycle, is not defying risk, it is simply hiding it.
The case of Bernard Madoff is the perfect example. For years he delivered returns on an amount of money that was becoming harder and harder to manage, and with an almost supernatural regularity, without the ups and downs that any real strategy in the kind of assets he claimed to invest in would have had. That impossible smoothness was the true alarm signal, not the return itself. It turned out to be the largest fraud in history. The lesson is not that every high return is fraud, but that when a return seems to defy the gravity of risk, there is something we are not seeing — call it hidden leverage, disguised illiquidity, or a lie.
The question worth asking
The right question, then, is never only "how much does it pay?" It is "how much does it pay, in exchange for what risk, over how long, and how much of that actually reaches my hands?"
If you are a foreign investor looking at the United States, that last clause carries extra weight. The distance between the gross number and your net outcome is wider when it has to cross a fee structure, a tax treatment and a currency you do not control. None of that makes a U.S. investment worse — it makes the unexamined headline number worse.
Return is the noisy part of investing, the part that gets shown off and the part that sells. But wealth is not built by chasing the highest number, it is built by understanding everything that number hides. A return you cannot explain is as dangerous as an asset you do not understand.
So the next time someone offers you an attractive return, are you going to ask how much it pays… or will you have the courage to ask in exchange for what?
Diego Alcalá
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This article is educational and informational. It is not investment, legal, tax or immigration advice, nor a recommendation to buy or sell any asset. Past returns do not guarantee future results. Consult a licensed professional before making decisions about your capital.
Originally published in Spanish on Comprando América: El rendimiento no lo es todo.