There is never a wrong time to invest in mutual funds for retirement. So, if you're still looking for the best mutual funds, the Zacks Mutual Fund Rank can be a great guide.

The best way to shortlist great mutual funds is to ensure solid performance, diversification, and low fees. Some are better than others, but utilizing the Zacks Mutual Fund Rank, we have identified three mutual funds that could be solid additions to one's retirement portfolio.

Let's break down some of the mutual funds with the top Zacks Mutual Fund Rank and the lowest fees.

Hartford Emerging Markets Equity R5 (HERTX) has a 1.04% expense ratio and 0.9% management fee. HERTX is a part of the Non US - Equity fund category, many of which will focus across all cap levels, and will typically allocate their investments between emerging and developed markets. With yearly returns of 10.88% over the last five years, this fund clearly wins.

RBB Free Market US Equity (FMUEX): 0.53% expense ratio and 0.49% management fee. FMUEX is an All Cap Growth mutual fund. In order to increase diversification, these funds have holdings across small, medium, and large-cap levels. With yearly returns of 10.93% over the last five years, FMUEX is an effectively diversified fund with a long reputation of solidly positive performance.

AQR Managed Futures Strategy R6 (AQMRX Quick QuoteAQMRX - Free Report) : 1.12% expense ratio and 1.05% management fee. AQMRX is a part of the Allocation Balanced fund category; these funds like to invest in a variety of asset types, finding a balance between stocks, bonds, cash, and sometimes even precious metals and commodities; they are mostly categorized by their respective asset allocation. With a five-year annual return of 15.16%, 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.