Even if you’d heard of this year’s best-performing metals, betting on them would probably have been a struggle. Ruthenium, iridium and the somewhat better known rhodium — used mostly in specialized products like hard disks, spark plugs and autocatalysts — have trounced almost all major commodities tracked by Bloomberg.
Prices are up at least 33 percent this year as demand improved for raw materials that are among the world’s rarest and collected as byproducts of mining the precious metals platinum and palladium.
Unlike most other commodities, which are bought and sold on exchanges around the world, these metals are quirky assets. There are few exchange-traded funds backed by rhodium and they are small and thinly traded. It’s even harder to buy and sell ruthenium and iridium, where most deals are between suppliers and industrial users.