Palladium Bullion and Coins
Palladium is a lustrous white material, one of the six platinum-group metals (along with ruthenium, rhodium, osmium, iridium and platinum itself).

Why is Palladium getting more expensive?
Tighten regulations to crack down on pollution from vehicles, forcing automakers to increase the amount of precious metal they use.
Why is supply so tight?
Palladium has been in deficit since 2012. Palladium’s status as a byproduct to platinum or nickel mining means producers aren’t quick to respond to price changes. In fact, output is projected to fall short of demand for a ninth straight year in 2020. That’s helped drive prices to successive records. While some obscure metals like rhodium are still more valuable, palladium traded above gold for most of the past year.

Growth of Vehicle Use
Palladium used within catalytic converters works with platinum and rhodium to reduce some of the most of harmful chemicals - catalyze the oxidation of hydrocarbons. Fighting pollution becomes important with tightening the pollution laws, more cars and more palladium is needed.