The funds in our "Magnificent Retirement Mutual Funds" list are among the best managed and best performing mutual funds available. If you are just finding out about our Top-Ranked Funds list, we welcome you!

The easiest way to judge a mutual fund's quality over time is by analyzing its performance, diversification, and fees. Using our Zacks 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.

Here are the funds that have achieved the #1 (Strong Buy) Zacks Rank and have low fees.

Oppenheimer Gold & Special Mineral Y (OGMYX Quick QuoteOGMYX - Free Report) : 0.92% expense ratio and 0.68% management fee. Sector - Precious Metal funds like OGMYX normally invest in stocks focused on the mining and production of precious metals such as gold, silver, platinum, and palladium. OGMYX has achieved five-year annual returns of an astounding 11.5%.

BlackRock Advantage Large Cap Growth I (CMVIX Quick QuoteCMVIX - Free Report) : 0.62% expense ratio and 0.57% management fee. CMVIX is a part of the Large Cap Growth mutual fund category, which invest in many large U.S. companies that are expected to grow much faster compared to other large-cap stocks. With yearly returns of 12.49% over the last five years, CMVIX is an effectively diversified fund with a long reputation of solidly positive performance.

T. Rowe Price Mid-Cap Growth Fund (RPMGX Quick QuoteRPMGX - Free Report) . Expense ratio: 0.74%. Management fee: 0.61%. Five year annual return: 12.75%. RPMGX is a Mid Cap Growth mutual fund. These mutual funds choose companies with a stock market valuation between $2 billion and $10 billion.

These examples highlight the fact that there are some astonishingly good mutual funds out there. If your advisor has you in the good ones, bravo! If not, you may need to have a talk.

Do You Know the Top 9 Retirement Investing Mistakes?

Investing in underperforming mutual funds is just one of the key errors that can derail your retirement plans.

To learn more, read our just-released report: 9 Retirement Mistakes You Need to Avoid.