Platinum trades as a precious metal but behaves substantially as an industrial one. The reason is that most of what is produced each year is used up rather than held.
Consumption dominates the demand mix
Vehicle exhaust systems, chemical process catalysts, glass manufacturing and electronics account for the bulk of annual platinum demand.
In each of those uses the metal is embedded in equipment or product and leaves the market until it is eventually recovered as scrap.
Investment and jewellery demand exist and matter, but they are a smaller share than they are for gold, so industrial buying sets the tone.
Industrial buyers respond to output, not price
A manufacturer needs a specific quantity of catalyst per unit produced, and that quantity is fixed by design and regulatory approval.
Purchases therefore rise and fall with production volumes rather than with the attractiveness of the price, and a cheaper metal does not cause more of it to be bought.
Demand consequently contracts during manufacturing downturns in a way that investment led demand does not.
Above ground stocks are small
Almost all the gold ever mined still exists in accessible form, so annual production is tiny relative to the stock that could in principle be sold.
Platinum has been produced in far smaller quantities and much of it has been consumed, leaving above ground inventories that are modest against annual demand.
A given imbalance between supply and demand therefore moves the platinum price much more than the same imbalance would move gold.
Supply cannot buffer the cycle
Mine output comes from deep operations that cannot be throttled up or down quickly without damaging the mine or the workforce.
Producers therefore keep running through weak periods, and the market absorbs the surplus through inventory rather than through reduced production.
Recycling adjusts faster, but it is tied to vehicle scrappage rates, which are themselves cyclical and correlated with the same economic conditions.
The precious metal label still applies at extremes
During periods of financial stress, platinum has sometimes attracted investment buying alongside gold, which temporarily loosens the industrial link.
Those episodes tend to be short, and the price generally returns to tracking manufacturing conditions once the stress passes.
Understanding which of the two forces is dominant at a given moment explains most of the divergence between platinum and gold over any particular stretch.