Treasuries weakened on September 9, 2026, as rising oil prices heightened inflation concerns and increased pressure on the Federal Reserve to raise interest rates as soon as next week. The selloff pushed yields on two- to 10-year notes to new highs for the year, with the two-year yield exceeding last year's peak. The 10-year yield only slightly surpassed last week's high.

Market catalysts also included a seasonal surge in new corporate bond issuance. 17 potential borrowers were lined up to follow Tuesday's 18 offerings, marking this year's third-busiest session for corporate debt sales.