U.S. investment-grade bond funds and exchange-traded funds recorded net outflows of $7.1 billion in the week ended July 22, the largest weekly withdrawal on record, according to LSEG Lipper data, as a surge in oil prices reignited inflation concerns and pushed Treasury yields higher. The withdrawal followed a record single-day outflow of $8.2 billion on July 20, underscoring the speed with which sentiment toward longer-dated corporate debt deteriorated over the period.
The selling pressure traces to a sharp rise in oil prices, which have climbed nearly 40% this month to move above $100 a barrel. The increase has been driven by Houthi attacks on tankers in the Red Sea and concerns over potential military action in the Middle East. The resulting jump in energy costs has clouded the inflation outlook, prompting a reassessment of the likely path of monetary policy. CME Group's FedWatch tool showed traders more than doubling the implied probability of a Federal Reserve interest-rate increase at next week's meeting, to roughly one in three.
That shift in rate expectations drove a selloff in government debt, sending the benchmark 10-year Treasury yield to its highest level since January 2025. Investment-grade corporate bonds, which typically carry longer maturities and lower coupons than other segments of the credit market, proved more sensitive to the move in benchmark yields, amplifying the losses that pushed investors toward the exit.
The divergence in performance was evident across fund categories. High-yield bond funds attracted approximately $534 million over the same week, while leveraged-loan funds also recorded modest inflows. Both asset classes carry structural features — shorter maturities in the case of high-yield debt and floating rates for loans — that reduce their exposure to rising government bond yields relative to investment-grade paper.
The performance gap was reflected in benchmark exchange-traded products. The iShares iBoxx $ Investment Grade Corporate Bond ETF, which tracks the Markit iBoxx investment-grade benchmark, has declined 2.58% so far this month, compared with a 0.93% decline in its high-yield counterpart.
The scale of the withdrawal from investment-grade funds signals a broader repricing of duration risk within corporate credit portfolios, as fixed-rate instruments face renewed pressure from a monetary policy path that markets now view as less certain than it appeared before the oil price shock. Should crude prices continue to climb or the Federal Reserve move to raise rates at its coming meeting, exposure to longer-duration, fixed-coupon debt is likely to remain a source of portfolio volatility, while allocations tilted toward floating-rate and shorter-maturity instruments stand to retain a relative advantage in the near term.
