If you invest in the materials sector, it's not a stretch to say that you're investing in the very building blocks of … well, just about everything.
Wherever you are right now, look around — walls, ceiling, lights, table, chairs, TV, computer, phone. Depending on the item, it might have been made by companies across several sectors — but the wood, plastic, metals, resins, paints or chemicals needed to make that item came from the materials sector.