Your Returns: Skill, or Just the Rising Tide?

In a bull market, everyone is a stock god — and that is precisely the problem.

Because it exposes something everyone experiences yet almost no one wants to admit: the money you made last time probably had nothing to do with your judgment. The tide was simply rising, lifting every boat with it.

Only when the tide goes out do you find out who's been swimming naked. But the more brutal truth is: when the tide is coming in, you can't even tell whether you can swim, or you're just being floated.

So the real question is never "how much did I make?" but rather: what kind of money, exactly, did I make?

This question lets you sort every gain and loss into four buckets. Understand this table, and you've already extracted the sweetness of this article:

Any P&L can be sorted into four buckets

The "high" of making money feels the same, but these four kinds of money come from radically different sources — and whether you should be pleased, and whether you can replicate it, depends entirely on which bucket it falls into.

Beta is "rented." When the overall market goes up, holding gets you a share. That's not skill; it's compensation for bearing the risk that "the market might crash." An index fund, or an account you never touch, gets the same thing. It doesn't belong to you — it belongs to "the market happened to rise during this stretch."

Risk premium is "collecting rent." There are always people who don't want a particular kind of risk — they don't want volatility, don't want possible default, don't want being unable to sell in a pinch, don't want the once-in-a-few-years blow-up. So they pay someone else to bear it for them. The bearer collects rent quietly day after day and looks both smart and unflappable. But the price is written in the fine print of the contract: on the extreme day, everything you collected — principal and interest — gets vomited back in one shot. This kind of money is structurally sustainable, but it drags a long, thin left tail — most days peaceful, one day pandemonium.

Alpha is the money that is truly "yours." You genuinely knew what others didn't, calculated what others couldn't, or occupied a structural position others couldn't enter. It's scarce, and worth being proud of. But don't romanticize it: alpha decays (what you discovered, others will eventually discover too), and capacity is limited (once the capital grows, the edge dilutes itself).

Luck is the most dangerous of the four. Dangerous not because it makes you lose, but because it makes you win. What luck does best is disguise itself as skill. It hands you a beautiful curve, convinces you that "I called it right," and tempts you to bet bigger and lever higher next time. By the time the truth surfaces, you've already put your entire net worth on a single lucky sample.

90% of your "insight" is rented

This is the point that most needs to be said out loud:

Most of what people take to be their alpha is actually unrecognized beta, or the sliver of premium collected from selling volatility.

You think you "called the trend" — probably beta was just rising and you happened to be there. You think you're "steadily profitable, with great composure" — probably you've unknowingly been collecting a risk premium, and the extreme day that spits it back hasn't arrived yet. What you can explain, replicate, and articulate the mechanism of is yours; everything else is borrowed and will eventually be repaid.

So how do you self-check? Here's a touchstone to carry with you.

The edge touchstone: force your thesis into one sentence

The next time you're about to act, fill your reasoning into the blank in this sentence:

"The market is wrong right now because ____________."

Then look at what you filled in.

If what you filled in is public news, the conclusion of a sell-side research report, or the hottest current narrative — then you almost certainly have no edge. Because these things are visible to everyone and have long been digested into the price. You didn't discover anything; you're just a passenger on beta, experiencing the illusion of "I'm so insightful."

Real edge, when filled in, tends to make you a little uneasy yourself: either it's an angle others haven't noticed, or a risk others aren't willing to bear, or something others structurally cannot do. If your reasoning sounds identical to what the expert on TV is saying, it isn't edge.

Take away this one line

When you make money, don't rush to celebrate. First distinguish whether it was your skill or the tide's kindness — because the tide never announces when it's going out.

Honestly sort every P&L into the four buckets, and you'll suffer more lucidly — but you'll live longer.

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This article is part of the "Investment Mindset" series. The most poisonous thing about luck is that it can make you add to your position at your most triumphant moment — in the next piece we'll talk about "why, after a winning streak, is precisely when you should be most on guard," and why living long matters more than winning big.