Junk Bonds On Track for Worst Month Since 2022 as Yields Surge

U.S. junk bonds are heading for their biggest monthly on-paper loss since 2022, after a spike in global bond yields weighed on fixed-income assets trading around the world.

The trigger has been a September surge in Treasury yields. Long-term yields climbed to the highest levels in decades, and were edging higher again on Tuesday, according to MarketWatch's Christine Idzelis. The repricing sent bond prices lower across the board in a broad and punishing selloff that spared neither credit quality tier nor geography.

The damage is broad. In the United States, both high-yield "junk" bonds and their investment-grade peers have been heavily impacted, Idzelis reports. The comparison point underscores how unusual the month has been: 2022, the last time junk bonds posted losses of this magnitude, was a year when inflation was soaring and the Federal Reserve was raising rates aggressively.

Widely held bond ETFs have been pummeled in September by rising rates. Among the funds named in the report are the iShares iBoxx $ High Yield Corporate Bond ETF (HYG), down 0.18% in the latest session, and the SPDR Bloomberg High Yield Bond ETF (JNK), down 0.14%. The broader Vanguard Total Bond Market ETF (BND) slipped 0.11%, while the iShares 20+ Year Treasury Bond ETF (TLT) fell 0.39%.

The yield backdrop explains the pressure. The U.S. 10-year Treasury stood at 5.256% in MarketWatch's latest reading, with the 2-year at 4.937%. Moves of that size at the long end translate directly into mark-to-market losses for bondholders, since prices fall as yields rise.

For high-yield investors, the mathematics is unforgiving. Junk bonds carry lower credit ratings and thinner cushions against rising benchmark rates than investment-grade debt. When Treasury yields spike this sharply, the price losses can overwhelm the extra coupon income that justified holding the riskier paper in the first place.

The selloff has not been confined to U.S. credit markets. Yields have risen globally, and fixed-income assets trading around the world have come under pressure in tandem — a reminder, the report notes, that Treasury moves still set the price of risk everywhere.

With roughly one trading day left in September, the month is set to close as the worst for junk bonds in four years, per MarketWatch's account. Whether October brings relief depends on where Treasury yields settle; as long as the long end keeps climbing to multi-decade highs, both junk and investment-grade bondholders face further paper losses — and the lowest-rated issuers face the sharpest repricing of all.