The recent bond selloff leaves investors with a choice: hold onto losses or use them to rethink fixed-income exposure. While declining bond prices offer tax-loss harvesting opportunities in taxable accounts, the key decision is what to buy next. With yields elevated, selling at a loss allows investors to reset duration, income, and interest-rate risk.
The Duration Decision
The iShares Core U.S. Aggregate Bond ETF (NYSE:AGG) illustrates the risk of high duration: its 5.74-year duration means a 1-percentage-point yield increase roughly drives a 5.7% price drop.
Replacing AGG with a short-duration option like the Vanguard Short-Term Treasury ETF (NASDAQ:VGSH) significantly cuts that interest-rate exposure.
With a 1.9-year duration and a 4.49% 30-day SEC yield, VGSH would see only a ~1.9% price decline in the same rate-hike scenario. It tracks the Bloomberg U.S. 1-3 Year Treasury Bond Index.
The Opposite Strategy is Also Possible
The iShares 7-10 Year Treasury Bond ETF (NASDAQ:IEF) has an effective duration of 6.89 years and a 4.73% SEC yield. Its NAV total return is down 2.64% year-to-date.
IEF therefore offers substantially more rate sensitivity than VGSH. If Treasury yields eventually decline, that duration could provide greater price appreciation. If yields rise further, however, the downside sensitivity also increases.
This creates three distinct choices for an investor harvesting a bond ETF loss:
- Reduce rate risk: Move toward short-duration Treasury ETFs such as VGSH.
- Maintain moderate exposure: Stay with a broad fund such as AGG.
- Increase duration: Use an ETF such as IEF for greater sensitivity to falling yields.
The Tax Loss Is Only the Catalyst
Tax losses provide the reason to trade, but duration determines the outcome. Shifting from AGG to a short-term fund like VGSH cuts duration from 5.74 to 1.9 years, insulating the portfolio against rising rates.
Conversely, moving to a longer-duration fund like IEF (6.89 years) increases rate sensitivity to capture potential price gains if yields fall.
Ultimately, the bond selloff gives investors a strategic chance to reset interest-rate risk at today’s higher yields—not just harvest a tax loss.
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