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.

NYLI WMC Intl Research I (MYIIX) has a 0.86% expense ratio and 0.75% management fee. MYIIX is a Non US - Equity option, focusing their investments acoss emerging and developed markets, and can often extend across cap levels too. With yearly returns of 10.42% over the last five years, this fund clearly wins.

Invesco Energy Investor (FSTEX Quick QuoteFSTEX - Free Report) : 1.22% expense ratio and 0.73% management fee. FSTEX is classified as a Sector - Energy mutual fund. Throughout the massive global energy sector, these funds hold a wide range of quickly changing and vitally important industries. With yearly returns of 25.77% over the last five years, FSTEX is an effectively diversified fund with a long reputation of solidly positive performance.

Vanguard Capital Opportunity Admiral (VHCAX) is an attractive large-cap allocation. VHCAX 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. VHCAX has an expense ratio of 0.32%, management fee of 0.31%, and annual returns of 13.02% over the past five years.

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.