Bond Funds Can Lose Value When Rates Rise Even Without Defaults
A retiree moving $500,000 from stocks to an intermediate bond fund still faces interest-rate risk. If yields rise by one percentage point, a fund with six-year duration could lose roughly $30,000 in value even if every issuer keeps paying. A rate-driven loss could pressure early Social Security claiming and permanently reduce monthly benefits.
The saver is 64, plans to leave work soon, draw $3,000 monthly from the 401(k) for three years, then start Social Security at 67. His $500,000 shift targets an intermediate fund whose six-year duration makes it sensitive to yield changes.
A one-point yield increase would reduce that balance by about 6%, or $30,000, even if all payments continue. A half-point move would imply roughly $15,000. The fund continually replaces maturing bonds, so unlike a held Treasury, it has no fixed date for restoring the original amount.
Near-retirees who shift large 401(k) balances into intermediate bond funds may face rate-driven losses just as they begin drawing income. If such losses prompt earlier Social Security claims, affected households could lock in permanently smaller monthly benefits and less lifetime income. This may also encourage savers and advisers to separate money needed within a few years from longer-term bond holdings, potentially improving retirement resilience.