LIT tracks a market-cap-weighted index of 20-40 companies involved in the global mining and exploration of lithium, or in lithium battery production. While the plain-vanilla fund gives broad exposure to the lithium industry, it manages to offer targeted, concentrated exposure with a micro-cap tilt. LIT is an excellent fit for investors looking for niche lithium exposure as an ETF. The index is reconstituted and rebalanced on an annual basis.