Fidelity Zero Total Market Index Fund FZROX

FZROX is one of the only major broad-market index funds with a 0.00% expense ratio, eliminating fund fees for Fidelity investors. Since launching in 2018, it tracks a proprietary Fidelity index designed to track the total US stock market. It is restricted to Fidelity brokerage accounts only, unlike more portable ETF alternatives, making it best suited for investors who keep their assets at Fidelity.