Best Vanguard Index Funds For 2024 Fidelity. That means the largest companies are the biggest holdings in the fund. As with all mutual funds, a key benefit of vanguard index funds is instant diversification, spreading out risk and dulling the impact of volatility, as broader stock market swings are.

We included the following screens in our rankings of the best fidelity mutual funds of 2024: That means the largest companies are the biggest holdings in the fund.