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The reliable way to compare these yields is to make them comparable before looking at the percentage. Match maturity or duration and use the right yield convention: a Treasury’s exact yield to maturity (or a Treasury constant-maturity benchmark), a corporate bond’s yield to maturity and yield to worst when it can be called, and a fund’s 30-day SEC Yield together with duration and expense ratio. Then adjust your interpretation for credit, call, liquidity, taxes, trading costs and the fact that an individual bond has a maturity date while a bond fund does not.
A larger number is not automatically a better return. It may be payment for accepting issuer default risk, interest-rate exposure, prepayment risk, lower liquidity or higher costs.
What each yield actually measures
“Yield” is not one universal statistic. It describes a return under a particular cash-flow model, price, time period and set of expenses. Comparing unlike measures can make a safe, short Treasury appear inferior to a riskier long corporate bond or make a bond fund’s income snapshot look like a guaranteed coupon.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches| Investment | Primary comparison measure | What it represents | What it does not promise |
|---|---|---|---|
| Individual Treasury note or bond | Exact yield to maturity (YTM) | The annualized return implied by the purchase price, coupon payments and payment of principal at maturity, assuming the security is held to maturity and payments occur as scheduled. | A fixed market price before maturity or a guaranteed reinvestment rate for coupons. |
| Treasury constant-maturity (CMT) benchmark | Par yield for a stated maturity | A point on the Treasury’s daily par-yield curve, based on closing market bid prices for recently auctioned securities. | The exact YTM of a particular Treasury you can buy. |
| Individual corporate bond | YTM; yield to worst (YTW) if callable | YTM uses the bond’s price and promised cash flows. YTW is the lowest yield produced by the relevant call or maturity scenarios. | Protection from issuer default, downgrade, spread widening or an unfavorable call. |
| Bond mutual fund or ETF | 30-day SEC Yield, plus duration and expense ratio | A standardized estimate of current portfolio income over a historical 30-day period, annualized after fund expenses. | A fixed income rate, a guaranteed return of principal or a date when your investment will mature. |
Start with maturity, duration and yield convention
Before ranking percentages, put the investments on the same interest-rate footing. A five-year Treasury, a five-year corporate bond and a fund with five years of average duration can still behave differently, but comparing a two-year instrument with a 20-year instrument without adjustment mostly measures the term premium and rate risk you chose, not the quality of the yield.
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Maturity is a date; duration is a sensitivity
Maturity is when an individual bond’s principal is scheduled to be repaid. Duration is an estimate of how much its price changes for a change in interest rates. A longer-duration holding generally moves more when rates change. A fund’s duration is the appropriate rate-sensitivity comparison because its holdings have different maturities and are continually replaced; the fund itself has no investor maturity date.
Use similar duration when the question is “which investment compensates me more for comparable rate risk?” Use similar maturity when comparing individual bonds that you expect to hold to repayment. If duration differs materially, show that difference rather than treating the yield gap as pure credit compensation.
Understand Treasury CMT correctly
The U.S. Treasury says its par yield curve “relates the par yield on a security to its time to maturity.” CMT yields are read directly from that daily curve and are “bond equivalent yields” for securities paying semiannual interest, expressed on a simple annualized basis. They are not annual percentage yields (APYs), and they may not match any one security’s quoted YTM.
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Use corporate YTM and YTW together
YTM is useful for a noncallable corporate bond when the issuer makes every scheduled payment and you hold to maturity. A callable bond needs a second check: yield to worst. The issuer may redeem it before maturity when refinancing is attractive, ending your higher-coupon income and forcing you to reinvest. YTW identifies the lowest yield among the applicable call and maturity outcomes; it is a risk-screening measure, not a promise that the lowest outcome will occur.
Treat SEC Yield as an income snapshot
The Securities and Exchange Commission says standardized SEC Yield approximates the current income generated by a fund’s portfolio over a historical 30-day period after expenses, annualized as a percentage of the offering price. It is a common basis for comparing bond funds, and the deduction of fund expenses is already reflected. It is not a forecast of total return, a guaranteed future distribution, or a commitment to return your principal on a stated date. Market prices, portfolio turnover, defaults, calls and distributions can all change the result.
How to compare the three categories step by step
- Define the job for the money. Decide whether you need a known repayment date, current income, preservation of capital over a particular horizon, or diversified exposure. A single bond can target a maturity date; a fund supplies ongoing exposure but no scheduled payoff date for your shares.
- Set a term or duration range. Record each individual bond’s remaining maturity and, where available, duration. For a fund, record effective duration from the latest fact sheet or prospectus. Exclude comparisons so different that the yield difference mainly reflects a different rate bet.
- Record the matching yield measure. For a Treasury benchmark, note the CMT term and date. For a specific Treasury or corporate bond, record YTM; add YTW for a callable issue. For a fund, record the 30-day SEC Yield, the date measured and the fund’s duration.
- Separate base rates from spreads. Compare a corporate YTM with a Treasury rate at a similar term or duration. The excess is commonly called the spread. It compensates investors for credit and liquidity risk and can widen or narrow even when Treasury rates are unchanged. It is not a free increment of income.
- Inspect credit exposure. Identify the corporate issuer, credit rating, seniority, industry concentration and any guarantees. For a fund, examine the portfolio’s rating mix, government exposure, high-yield allocation and concentration limits. A Treasury has U.S. Treasury issuer exposure, but its market price still changes before maturity.
- Check security provisions. For an individual bond, read call dates, call prices, sinking-fund provisions, puts, convertibility and payment frequency. For a fund, read the prospectus for permitted securities, derivatives, use of leverage and prepayment exposure. A callable corporate bond cannot be evaluated from YTM alone.
- Put every cost beside the yield. Note the purchase price, brokerage commission, bid-ask spread and any platform charge for an individual bond. For a fund, record the expense ratio and the trading spread; SEC Yield is already net of operating expenses, while an individual-bond YTM generally is not net of your transaction costs.
- Convert to an after-tax comparison. Apply your federal, state and local tax situation to interest and distributions. Compare the amount you can actually keep, not just the displayed pretax percentage.
- Stress the rate move you could tolerate. Use duration as an approximation of price sensitivity. Ask how a rise or fall in rates would affect an individual bond’s market value, a corporate bond’s spread, and the fund’s net asset value or trading price. Decide whether you can hold an individual bond through maturity or would need to sell early.
- Document the observation date. Treasury quotations and fund yields change daily. Save the Treasury table, bond quote and fund prospectus or fact sheet used, so a later comparison does not mix figures from different dates.
Risk differences that explain a higher yield
Treasury securities
Treasury securities expose you to the U.S. Treasury issuer and to market-price risk if you sell before maturity. A Treasury held to maturity has scheduled coupons and principal, subject to the government’s payment obligations, but its quoted price can fall when market rates rise. Treasury interest is generally exempt from state and local income tax, while federal tax applies; verify current treatment for your jurisdiction and account.
Corporate bonds
Investor.gov describes a corporate bond as a loan to the issuing company. You face default risk, the possibility of a credit downgrade, and spread risk: the bond can lose value if investors demand a larger premium over Treasuries even when Treasury rates do not move. Non-investment-grade bonds generally offer higher rates because these risks are greater. Liquidity can also be weaker, increasing the cost of selling or making a quoted yield less dependable for a small trade.
Call risk changes the pattern of returns. If a company calls a bond when rates have fallen, you receive principal sooner than expected and may be unable to replace the income at the original yield. Read the call schedule and compare YTW before deciding that a corporate yield premium is sufficient.
Bond mutual funds and ETFs
A bond fund spreads exposure across many holdings, reducing the effect of one issuer’s failure, but it does not remove credit, interest-rate or prepayment risk. The SEC’s mutual-fund guidance notes that longer-term funds generally have greater rate sensitivity and that even a fund investing only in U.S. Treasury bonds can lose money when rates rise because the market value of its holdings falls.
Fund distributions vary with portfolio income, trading and realized gains or losses. Your shares are sold at the fund’s net asset value or, for an ETF, at a market price that can temporarily differ from NAV. There is no date when the fund must return your original investment at par.
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Tax treatment
TreasuryDirect states that Treasury-bond interest is paid every six months and federal tax is due each year on interest earned. Treasury interest is generally state and local tax exempt, but check current state rules and your tax documents. Corporate-bond interest is ordinarily taxable, and fund distributions may include taxable interest and realized gains. A municipal-bond fund or tax-exempt issue would require a separate tax analysis; do not compare its tax-exempt yield with a taxable yield without converting to an equivalent basis.
Tax rules depend on account type, residence, filing status and changes in law. Use the issuer’s tax reporting and consult a qualified tax professional for an account-specific answer.
Transaction and operating costs
An individual-bond quote may omit the dealer’s bid-ask spread or a commission. Those costs reduce your realized return, especially when the position is small or you sell before maturity. A fund’s expense ratio is deducted from assets; the SEC Yield calculation already deducts fund expenses, but you still pay any trading spread or commission when buying or selling shares. Compare like with like by stating whether each figure is before or after the relevant costs.
Reading a yield spread without overclaiming
Suppose a corporate bond and a Treasury have similar duration. The corporate bond’s higher YTM is a market price for several risks at once: probability of default, expected loss if default occurs, downgrade risk, liquidity and sometimes call uncertainty. It is not possible to label the entire difference “extra income” that you will surely receive. A fund’s SEC Yield can be higher for the same reasons if its portfolio owns more corporate, high-yield or longer-duration securities; its expense ratio has already reduced the displayed figure.
When the corporate spread is unusually narrow, you may be receiving little compensation for taking additional credit and liquidity risk. When it is wide, investigate whether the market is pricing genuine deterioration rather than assuming the bond is a bargain. Review rating outlooks, financial condition, industry concentration and the bond’s trading liquidity before drawing a conclusion.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common comparison mistakes and fixes
- Comparing CMT with SEC Yield. Fix: label CMT as a Treasury benchmark and SEC Yield as a 30-day, after-expense fund income measure; do not call either one a guaranteed return.
- Using coupon as yield. Fix: use YTM based on the bond’s current price. A premium bond can have a coupon above its YTM; a discount bond can have a coupon below it.
- Ignoring calls. Fix: calculate or obtain YTW and read every call date and price.
- Matching calendar maturity but not duration. Fix: compare duration when fund holdings or embedded options make price sensitivity different.
- Assuming a Treasury fund behaves like a Treasury held to maturity. Fix: recognize that fund shares have no maturity and can lose market value when rates rise.
- Ranking pretax figures. Fix: calculate after-tax income using your own jurisdiction and account.
- Forgetting fees and spreads. Fix: subtract brokerage and trading costs for individual bonds and include the fund’s expense ratio and share-trading spread.
- Mixing dates. Fix: use quotes and fund data from the same observation date, since yields move daily.
Where the official figures come from
Use the U.S. Treasury’s current Interest Rate Statistics tables for CMT and bill quotations. Treasury documentation says daily bill quotations are obtained at approximately 3:30 p.m. from Federal Reserve Bank of New York market quotations. The Treasury began publishing its TIPS real-yield series on January 2, 2004; that series is relevant when you are comparing inflation-protected securities rather than nominal yields.
For an individual bond, use the broker’s live quote and the security’s offering documents, checking how the displayed YTM handles settlement, accrued interest and commissions. For a fund, use the latest prospectus and standardized shareholder report for SEC Yield, duration, portfolio composition and expense ratio. The SEC’s standardized measure uses a historical 30-day period, so always retain its “as of” date.
A practical comparison worksheet
| Field | Treasury security | Corporate bond | Bond fund or ETF |
|---|---|---|---|
| Yield to record | Exact YTM; CMT only as a term benchmark | YTM and YTW if callable | 30-day SEC Yield |
| Rate-risk measure | Duration or maturity-specific sensitivity | Duration plus spread sensitivity | Effective duration |
| Credit questions | U.S. Treasury exposure | Issuer rating, default, downgrade and seniority | Portfolio ratings, concentration and government allocation |
| Cash-flow question | Six-month coupons and stated maturity | Coupons, maturity and possible call | Variable distributions; no maturity date |
| Cost questions | Price, spread and commission | Price, spread and commission | Expense ratio plus trading spread or commission |
| Tax questions | Federal tax; generally state/local exemption | Ordinary taxable interest in most cases | Taxable distributions according to the fund and account |
Fill in this worksheet from documents dated the same day, then compare only after the term, yield convention, risk and cost fields are complete. If a field is not disclosed, mark it as “not stated” and treat that absence as a reason to investigate, not as evidence that the risk is zero.
Bottom line for a purchasing decision
Choose an individual Treasury when a defined maturity date and relatively direct government-credit exposure fit your objective, while accepting market-price risk before maturity. Consider a corporate bond only after the yield premium is weighed against the issuer’s default, downgrade, call and liquidity risks. Choose a bond fund when diversification and ongoing trading matter more than a guaranteed maturity value, and judge its SEC Yield alongside duration, portfolio credit quality, expense ratio, taxes and trading spread.
The defensible comparison is therefore not “which percentage is highest?” It is “which after-cost, after-tax income measure compensates me adequately for the same rate exposure and for the additional risks I am willing to own?”
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