>>yes, we think that sqm and rockwood have narrow economic moats. >>what do these companies do?ium as well as other industrial chemicals. >>so they take the raw material from the earth and create the lithium that is used in batteries? >>lithium comes out of the salt brines in chile. you go through an evaporative process or a mining process. so they are a raw material supplier to the battery makers. they are mining companies but it's not always mining. sometimes it can be pumping lithium brines from these massive salt ponds. >>in a nutshell, it's an opportunity but go in with your eyes open. >.yes because we needed to keep a key eye on what the supply and demand outlook is for lithium. right now we are actually forecasting that lithium prices will fall as a lot of new supply for lithium comes online. but as we talked about, both supply and demand are uncertain. >>elizabeth collins from morningstarthanks so much. >>thank you for having me. thank you bill. still ahead when is the best time to buy a slice of apple. and is the stock market ready for a rebound? chart talk is next. in