If a tree falls in the wood but no one's there to find it, does the stock price of a lumber company go down? Who knows. We do know that lumber (wood) and derivative products are used across a huge range of industries, from construction to FMCG, and supply shortages of this natural resource can cause a ripple effect – take a look at housing prices in the US over the last 2-3 years for example. This Spark lists some of the biggest US lumber-related companies you may want to take a look at if you're looking at the sector, but don't take our word for it. Make sure you do your own research so your investments don't get cut down.