It is never too late to invest in mutual funds for retirement. As such, if you plan to invest in some of the best funds, the Zacks Mutual Fund Rank can provide you with valuable guidance.

The easiest way to judge a mutual fund's quality over time is by analyzing its performance, diversification, and fees. Using the Zacks Mutual Fund Rank of over 19,000 mutual funds, we've identified three outstanding mutual funds that are ideally suited to help long-term investors pursue and achieve their retirement investing goals.

Let's learn about some of Zacks' highest ranked mutual funds with low fees you may want to consider.

If you are looking to diversify your portfolio, consider American Century Global Gold A (ACGGX Quick QuoteACGGX - Free Report) . Sector - Precious Metal funds like ACGGX normally invest in stocks focused on the mining and production of precious metals such as gold, silver, platinum, and palladium. This fund is a winner, boasting an expense ratio of 0.91%, management fee of 0.65%, and a five-year annualized return track record of 21.74%.

Empower Large Cap Value Inv II (MXHAX): 0.81% expense ratio and 0.59% management fee. MXHAX is a part of the Large Cap Value category, and invests in equities with a market capitalization of $10 billion or more, but whose share prices do not reflect their intrinsic value. MXHAX, with annual returns of 11.4% over the last five years, is a well-diversified fund with a long track record of success.

Vanguard Market Neutral Investor (VMNFX): 0.2% expense ratio and 0.16% management fee. VMNFX is a Market Neutral - Equity mutual fund. These portfolios usually hold 50% of their securities in a long position, as well as 50% in a short position. With a five-year annual return of 13.24%, this fund is a well-diversified fund with a long track record of success.

There you have it. If your financial advisor had you put your money into any of our top-ranked funds, then they've got you covered. If not, you may need to talk.