Choosing a Fund Type · Mutual Funds

Bond funds and money market funds both invest in debt instruments, but they are not interchangeable. Maturity, credit quality, liquidity and valuation rules change how their risks behave.

Separate income from capital stability

A bond fund collects interest but its holdings also change in price. Rising market yields can reduce the value of existing bonds, while deteriorating issuer credit can cause additional losses. An ordinary bond fund generally has no single maturity date when your purchase price is promised back. Individual bonds inside it mature, but the portfolio can reinvest and continue indefinitely.

Understand what a money market fund holds

Money market funds generally hold liquid debt with short maturities, along with cash or cash equivalents. Their yields change as holdings roll over and short term rates move. They are investments rather than bank deposits and do not receive FDIC deposit insurance. Some use a stable NAV convention, while others have a floating NAV. Stable pricing is an objective, not a guarantee against loss.

Compare more than the yield

Check duration, issuer quality, currency, liquidity terms and charges. A higher bond fund yield can reflect additional credit or maturity risk. Do not substitute an ultra short bond fund for a money market fund solely because the names sound similar. Read the actual holdings and mandate. Liquidity fees can apply to money market funds under their rules, particularly in stress.

Translate risk into a useful question

Imagine two portfolios with an approximate duration of one year and six years. A small parallel one percentage point yield increase implies roughly 1% and 6% price declines respectively before income, convexity and other effects. This is a sensitivity estimate, not a forecast. It helps explain why two income products can respond very differently to the same rate move.

Try it yourself

A fund offers a higher yield but holds weaker corporate issuers and longer duration bonds. Does the yield alone show it is a better cash reserve?

Show the worked answer

No. The yield may compensate for risks that are unsuitable for a cash reserve. Compare the timing of your cash needs with possible capital losses and access restrictions.

Further reading

Educational material, not a recommendation to buy or sell a fund. Numerical examples are hypothetical. Fund terms, investor eligibility and tax treatment vary by product, account and jurisdiction.

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