M1 Commodity supercycles

Topic

Commodity supercycles represent the long-term dynamic of the resources/extraction sector: phases of price booms and busts spanning years or decades—far slower than the short-term volatility that typically characterizes commodity price shocks. The variable triggering the transition between phases is the commodity's price relative to its marginal extraction cost: when the price remains well above that marginal cost, the sector enters a scarcity regime; when the price falls toward or below the marginal cost, it enters an abundance regime.

Marginal extraction cost is not a factor external to the sector; it depends directly on the previously described reserves and extraction capacity—that is, on the remaining resource stock and the level of development of extraction infrastructure. As resource depletion progresses and the most accessible reserves are consumed, extracting the next unit becomes costlier, pushing the regime toward scarcity even without an independent change in commodity prices; conversely, expanding extraction capacity or discovering new reserves can lower the marginal cost, returning the sector to an abundance regime.

This long-term dynamic provides the framework in which commodity price shocks occur: a short-term fluctuation far exceeding historical volatility can happen in either regime, but the starting point—how close the price is to the marginal cost at that moment—determines whether the shock finds the sector with some leeway or already on the verge of a regime shift. Furthermore, a sustained scarcity regime is the environment where the resource sector's share of GDP tends to rise and the "resource curse" becomes more likely, because the rent associated with extraction—which is geographically fixed, as previously noted—becomes increasingly concentrated the longer the price remains above the marginal cost.

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