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

Hennessy Cornerstone Mid Cap 30 Investor (HFMDX Quick QuoteHFMDX - Free Report) has a 1.36% expense ratio and 0.74% management fee. HFMDX is a Mid Cap Blend mutual fund that typically features a portfolio filled with stocks of various sizes and styles; it allows for a diversification strategy focusing on companies with market caps between $2 billion and $10 billion. With yearly returns of 12.87% over the last five years, this fund clearly wins.

MFS Mass Investors Growth Stock R4 (MIGKX Quick QuoteMIGKX - Free Report) : 0.46% expense ratio and 0.33% management fee. MIGKX is a Large Cap Growth option; these mutual funds purchase stakes in numerous large U.S. companies that are expected to develop and grow at a faster rate than other large-cap stocks. MIGKX, with annual returns of 11.54% over the last five years, is a well-diversified fund with a long track record of success.

Arrow Managed Futures Strategy I (MFTNX Quick QuoteMFTNX - Free Report) . Expense ratio: 1.18%. Management fee: 0.85%. Five year annual return: 10.24%. MFTNX is classified as an Allocation Balanced fund, which seeks to invest in a balance of asset types, like stocks, bonds, and cash, and including precious metals or commodities is not unusual.

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.