Do not confuse the two terms.

Return

What an investor has actually earned on an investment during a certain time period in the past.
Total return includes dividends and capital gains that the fund distributes to shareholders. A mutual fund incurs capital gains when it sells some of its portfolio holdings to lock in profits or redeem fund shares.

Yield

Yield is Prospective not Retrospective. Yield is the investment income paid by many investments. For example the dividends from shares, or the rents paid on property.

Blue chip shares often give good yield because the dividends tend to be higher.

A Money market fund, also known as principal stability funds, is a type of mutual fund that is required by law to invest in low-risk securities. These funds have relatively low risks compared to other mutual funds and pay dividends that generally reflect short-term interest rates.

Money market funds generally invest in

• Government securities
• Certificates of deposits
• Commercial paper of companies
• other highly liquid and low-risk securities.

Money market funds are generally the safest and most secure of mutual fund investments.