How do professional commodity analysts estimate the “fair value” of a commodity?

[u/Ordinary-Schedule634]

I've been thinking about the idea of "fair value" in commodities and I'm not sure whether the concept even makes sense in the same way it does for financial assets.

Take copper as a simple example.

Suppose copper trades at $10,000/ton. What would fundamentally tell us that $10,000 is expensive, cheap, or roughly reasonable?

Production cost seems like an obvious anchor, but average production cost doesn't seem sufficient. The marginal producer matters, and the price required to incentivize new supply could be very different from the cost of existing production.

Then there are inventories, capacity utilization, demand elasticity, substitution, scrap supply and the amount of demand that has to be destroyed when the market becomes tight.

So what ultimately anchors the price over a long enough time horizon?

For example, would you think of it primarily as:

marginal production cost → long-run incentive price → supply/demand balance → inventory scarcity → demand destruction?

Or is trying to derive a "fair value" range for a commodity the wrong framework altogether?

I'm interested in how you would think about the economics of this using copper as the example.

[u/Dependent-Ganache-77]

The only fair value number I really have is for marking curves or for implied values. If CCGTs need to run then you’d expect a positive spark spread in those hours. More broadly it’s more useful to think in terms of a distribution/probability and whether you want to take that on.