An asset that moves with everything already held adds risk and adds no diversification whatever, however good its own return happens to be. The relationship is the point of this view rather than the level of anything.

That relationship is measurable, and measuring it repeatedly is the only way to notice when it has changed. It changes more than most people expect, and rarely at a convenient moment.

What it actually measures

The direction of travel matters considerably more than the current number does. Any single window is a compromise between being more than noise and reflecting present conditions, so a trend visible across several windows carries far more than a reading taken in one.

Correlations have shifted sharply and without any warning at all. An asset that spent years moving independently has then moved in lockstep for months on end afterwards.

Three comparisons answer three separate questions. Tracking equities, tracking gold and tracking the dollar are different relationships entirely, and they have disagreed with each other for long stretches at a time.

The relationship rises exactly when it would have been most useful low

The case for holding an uncorrelated asset is that it will not fall with everything else. The measurement that supports that case is taken in ordinary conditions.

In stress, correlations across almost every asset class have risen together, which means the diversification was least available at precisely the moment it was needed. It is not a quirk of this market in particular, and it applies to this market as fully as to any other.

What it does not tell you

A correlation says nothing about magnitude at all. Two assets can move together with great reliability while one of them travels five times as far as the other.

It is measured over a window and therefore lags. A relationship that broke recently still reads as intact for a while.

It describes co-movement, not cause. Two assets responding to the same third thing produce exactly the reading that one driving the other would.

The comparisons are a small set by design. Tracking three familiar macro assets leaves out a great deal that also matters to how a portfolio actually behaves in practice.

How to read it

Strong positive. Moving firmly with the comparison, so no diversification is on offer.

Weak positive. A loose positive relationship.

Neutral. Moving independently of the comparison.

Weak negative. A loose inverse relationship.

Strong negative. Moving firmly against the comparison.

The Relative Performance dashboard tracks Macro Correlation beside Crypto Correlation, Asset Ratio and Risk vs Return.

Common questions

Why should a holder care about this?

Because something that travels with everything already owned piles on exposure while spreading nothing, whatever it returns. What is being read here is the relationship, not the level of anything.

Do these relationships hold still?

It does not, and that is the difficulty with the whole idea. These relationships have jumped abruptly, and they have tended to tighten during exactly the frightening weeks when a spread would have been worth having.

How long a window is worth using?

One long enough to rise above noise and short enough to describe the present. Every choice trades those against each other, which is why where the reading is heading counts for more than where it sits today.

Are the moves the same size when the reading is high?

No. Two assets can move together reliably while one travels five times as far, because what is measured here is agreement of direction and not magnitude.

Is a high figure evidence that one drives the other?

It is not, and nothing in the reading tells the two apart. Two assets both responding to some third thing produce precisely the figure that one driving the other would.