Treasury Yields Surge as Inflation and Fed Tightening Reshape Q3
Third Quarter, 2026
John R. Sides, CFA
The third quarter was a painful one for fixed income investors as government bond yields rose dramatically across developed markets. In the U.S., a confluence of factors drove yields higher across the curve - the commencement of a Fed hiking cycle under Chairman Warsh, a strong labor market, resilient domestic growth, and the ongoing conflict in Iran driving oil prices higher. Where does that leave us now? While bond market investors felt the pinch of negative total returns in the quarter due to higher yields, the relative attractiveness of bonds is the strongest in years.
Yields in the front end of the curve had to contend with a more hawkish Fed. While the Fed held rates steady in July, Chairman Warsh’s Jackson Hole speech in August pointed to a more protracted hiking cycle than the market had previously priced in. The Fed raised rates in the September meeting by 25 basis points, and the market now prices in at least one more hike by the end of 2026. The 2-year breakeven rate - the market-implied level of annualized inflation of the next two years - stands at 2.5% today, up from 2.0% at the beginning of the quarter. Oil isn’t helping. Benchmark crude oil prices soared in the third quarter. Brent crude rose from $73 a barrel to $103 a barrel, a 42% surge. Similarly, WTI rose 29% to end the quarter at $92 a barrel. Oil, Treasury yields, and inflation expectations were all highly correlated during the quarter. Headline CPI printed at 3.5% in June, 3.4% in July, and 3.4% in August, substantially higher than the Fed’s 2% target. Core CPI, which strips out the run higher in commodity prices, printed at 2.6%, 2.5%, and 2.4% over the same period. Warsh remains committed to reigning inflation back to the target.
Recently, strong payrolls, composite PMIs (Purchasing Manager’s Index), and GDP prints have given the Fed plenty of cover to continue hiking policy rates even as inflation starts to roll over - look for the Fed to hike at least one more time this year. U.S. real GDP increased at an annualized rate of 2.2% in the second quarter, exceeding the 1.5% surveyed estimate. The latest composite PMI reading - a measure of the overall health of the private sector - was the most expansionary since COVID at 58.3. In August, the U.S. added 162,000 jobs, well above the 55,000 estimate, and jobs numbers from previous months were revised higher. Collectively, these pro-growth data points put upward pressure on rates further out the yield curve. The 10-year Treasury yield rose 82 basis points and the 30-year rose 68 basis points to end the quarter at 5.29% and 5.63%, respectively.
Elsewhere in fixed income, the sell-off in corporate credit was dampened by remarkable strength in equities, healthy corporate earnings, and yield-focused investors flocking to investment-grade credit. The investment-grade corporate credit index only widened by 6 basis points to end the quarter at 80 basis points. Agency MBS suffered from heightened interest rate volatility, particularly in September. The 30-year MBS basis to U.S. Treasuries widened from 95 basis points on June 30th to 115 basis points by quarter end. In ABS and CMBS, spreads tightened as demand for high quality, AAA-rated product remained intact. As it stands today, the go-forward prospects for bond investors are favorable. Starting yields (and higher reinvestment rates) offer an attractive entry point for those seeking fixed income exposure.
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