Aluminum Bulls Should Soon Return to Rare-Breed Status

Prices have skyrocketed in London—but the gains may prove too much, too soon

We live in a time of wonders: aluminum bulls are freely roaming the land.

Aluminum, the perennial laggard of the metals world in the years since the financial crisis, had a stellar 2017, with prices up more than 30% on the London Metal Exchange. The Trump administration’s move to sanction Russian giant Rusal, one of the world’s largest producers, has given the metal a further shot in the arm: prices have leapt another 19% since the sanctions announcement and touched a six-year high Tuesday.

...