Fidelity Zero Total Market Index Fund FZROX

FZROX is the only major broad market index fund with a 0.00% expense ratio, eliminating all fees and maximizing net returns for Fidelity investors. Since launching in 2018, it tracks a proprietary Fidelity index and mirrors #1 VTI's performance within 0.01% over 5 years, proving zero fees come without sacrificing returns. However, it is restricted to Fidelity accounts only, unlike #1 VTI's portability, making it best for dedicated Fidelity users who save $30 per $100k invested annually compared to VTI's 0.03% expense ratio.