How Do Bond ETFs Work? Duration, Yield and Trading Explained

By Adam Patti, Chief Executive Officer, VistaShares | Published November 13, 2026

A bond ETF holds a portfolio of bonds, such as Treasuries, corporate bonds or municipal bonds, and trades on an exchange like a stock. Unlike an individual bond, most bond ETFs have no maturity date; they continuously replace bonds as they mature or no longer fit the fund’s rules. The two most important features to understand are duration, which measures sensitivity to interest rates, and the various yield measures funds report, and bond ETFs also trade differently from the bonds they hold, which affects their prices relative to net asset value.

What do bond ETFs hold?

Bond ETFs cover nearly every part of the fixed income market:

Government bonds, including U.S. Treasuries of various maturities and inflation-protected securities.

Investment-grade corporate bonds, issued by companies with higher credit ratings.

High-yield corporate bonds, issued by companies rated below investment grade, which pay higher interest to compensate for greater default risk.

Municipal bonds, issued by state and local governments, whose interest is often exempt from federal income tax.

Mortgage-backed and securitized bonds, backed by pools of loans.

International and emerging-market bonds, issued outside the United States.

Aggregate or broad bond funds, which combine several of these categories.

Some bond ETFs track indexes; others are actively managed, which is common in fixed income. Our article on active versus passive ETFs explains the difference.

What is duration?

Duration measures how sensitive a bond or bond fund is to changes in interest rates. As a rough guide, a fund with a duration of five years would be expected to fall about 5% in price if interest rates rose by one percentage point, and to rise about 5% if rates fell by one percentage point, all else equal. The relationship is approximate and is most accurate for small rate changes.

Short-duration funds, such as those holding bonds maturing within a few years, are less sensitive to rate changes and tend to have lower price volatility.

Long-duration funds, such as those holding bonds maturing in 20 or 30 years, are much more sensitive to rate changes.

Duration is one of the most useful numbers on a bond fund’s fact sheet because it indicates how the fund’s price may respond when rates move.

What other risks do bond ETFs carry?

Credit risk. The possibility that issuers miss payments or default. It is higher for high-yield and some emerging-market bonds.

Spread risk. Prices of corporate and other non-government bonds can fall when investors demand higher yields relative to Treasuries, even without defaults.

Inflation risk. Rising inflation reduces the purchasing power of fixed payments and often coincides with rising rates.

Liquidity risk. Some bonds trade infrequently, which can affect pricing during stressed markets.

Currency risk. International bond funds that do not hedge currency are exposed to exchange rate changes.

What do bond ETF yields mean?

Bond funds report several yield figures, each measuring something different.

30-day SEC yield. A standardized figure based on the net investment income the fund earned over the last 30 days, annualized, using a formula set by the SEC.¹ It allows comparison across funds.

Distribution yield. Recent distributions annualized and divided by price or net asset value. It reflects what the fund has paid.

Yield to maturity or yield to worst. An estimate of the annual return from holding the fund’s bonds to maturity, or to the earliest call date, assuming all payments are made. It describes the portfolio, not a forecast of the fund’s return.

Our article on distribution rate versus 30-day SEC yield explains the two most common figures.

How do bond ETFs differ from individual bonds?

An individual bond held to maturity returns its face value at maturity, assuming no default, regardless of how interest rates moved in between. Most bond ETFs do not mature; they maintain a target maturity range by buying and selling bonds, so their price continues to move with rates indefinitely.

Some bond ETFs are designed to mature. Defined-maturity or target-maturity bond ETFs hold bonds maturing in a specific year and distribute their assets to shareholders when those bonds mature, combining features of individual bonds and funds.

Bond ETFs also offer diversification across many issuers, which is difficult to achieve with individual bonds in smaller portfolios, and they trade on exchanges with visible prices.

How do bond ETFs trade?

Bond ETF shares trade on an exchange throughout the day, while many of the bonds they hold trade infrequently in over-the-counter markets. As a result, the ETF’s market price can reflect current conditions more quickly than the prices used to calculate its net asset value.

In normal markets, creation and redemption keeps bond ETF prices close to net asset value. During stressed markets, bond ETFs have at times traded at noticeable discounts to net asset value. In many such cases, the ETF price reflected where the bonds could actually be sold, while the net asset value relied on bond prices that had not yet adjusted. Our article on ETF bid-ask spreads and premiums or discounts explains this, and our article on what an ETF is and how it works covers creation and redemption.

How are bond ETF distributions taxed?

Interest from most bond funds is generally taxed as ordinary income. Interest from municipal bond funds is often exempt from federal income tax and may be exempt from state tax for residents of the issuing state. Treasury interest is generally exempt from state and local income taxes. Our article on ETFs in IRAs, Roth IRAs and 401(k)s discusses where income-producing funds are often held. Investors should consult a tax advisor.

How can investors evaluate a bond ETF?

Key questions include what sectors and credit qualities the fund holds, its duration and average maturity, which yield measures it reports, its expense ratio and bid-ask spread, whether it hedges currency, and whether it tracks an index or is actively managed. More introductory topics are covered in our ETF basics guide.

Investments involve risk, including possible loss of principal.

Frequently asked questions

Do bond ETFs lose value when interest rates rise?

Generally, yes. When rates rise, the prices of existing bonds fall, and so does the value of funds holding them. The size of the decline depends largely on duration: long-duration funds are more sensitive than short-duration funds. Over time, the fund reinvests at higher yields, which can offset part of the decline.

What is a good duration for a bond ETF?

It depends on the investor’s goals and tolerance for price swings. Short-duration funds have less interest rate sensitivity and lower price volatility, while long-duration funds are more sensitive. Matching duration to the investor’s time horizon is a common approach. Many investors also blend durations.

Do bond ETFs mature like individual bonds?

Most do not. They continually replace bonds to maintain a target maturity range. Defined-maturity bond ETFs are an exception: they hold bonds maturing in a specific year and return their assets to shareholders when those bonds mature. They are sometimes used to build bond ladders.

Why might a bond ETF trade at a discount to NAV?

During market stress, bond ETF prices can move faster than the prices used to calculate net asset value, which may rely on bonds that have not traded recently. A discount can mean the ETF price reflects current market conditions more accurately. Creation and redemption generally narrows the gap as markets stabilize.

Are municipal bond ETF distributions tax-free?

Interest from municipal bond funds is often exempt from federal income tax, and may be exempt from state tax for residents of the issuing state. Capital gains are generally taxable, and some municipal interest may be subject to the alternative minimum tax. A tax advisor can confirm the treatment.

Cite this page: Adam Patti, "How Do Bond ETFs Work? Duration, Yield and Trading Explained," VistaShares, updated November 13, 2026, https://www.vistashares.com/bond-etfs-explained/. Plain-text version.

This material is provided for educational purposes only. It is not investment, legal or tax advice, and it is not a recommendation or an offer to buy or sell any security. Information is drawn from sources believed to be reliable as of the date of publication, is not guaranteed as to accuracy or completeness, and may change without notice. Figures attributed to third parties are their estimates. Projections and forecasts are not guarantees of future results. Investors should consult their own financial, legal and tax professionals before making investment decisions. Investments involve risk, including possible loss of principal. ETF shares are bought and sold at market price, which may differ from net asset value, and brokerage commissions and other trading costs may apply.