In its November report, mortgage security firm Freddie Mac called 2017 the “best year in a decade” for the housing market by a variety of measures. These include low inflation, strong job growth and historically-low mortgage rates. This assessment is very encouraging, not just for homebuyers and builders and the U.S. economy in general, but also for commodities, resources and raw materials as we head into 2018.

Although past performance is no guarantee of future results, it’s still instructive to look back at how materials performed the last time the U.S. was ramping up housing starts and mortgages. The last housing boom, which peaked in 2006, was accompanied by elevated commodity prices. We could see a return to these valuations…