Rising oil prices amid geopolitical tensions over the Strait of Hormuz and Iran negotiations have fueled inflation concerns, pushing the 10-year Treasury yield to multi-decade highs near 5.24% late in September 2026. Stronger-than-expected PMI data, weak Treasury auctions, and mounting fiscal worries over government debt have reinforced expectations for additional Federal Reserve tightening, with traders pricing in elevated odds of near-term rate hikes. Yields climbed roughly 45 basis points over the prior four weeks from early-September levels around 4.8%, marking the steepest recent advance since spring. Upcoming PCE inflation and employment reports could further influence positioning before month-end resolution.