The 30-year Treasury yield has climbed to approximately 5.28–5.29% as of September 9–10, 2026, amid a recent selloff that pushed intraday levels above 5.31%. The primary near-term driver is investor disappointment with the Treasury’s $6 billion longer-dated buyback operation, which fell short of expectations for a larger or more aggressive program and triggered selling in the long end. Broader upward pressure stems from resilient U.S. growth, elevated capital demand tied to AI investment, sticky core inflation, and shifting Fed expectations that have lifted the odds of a September rate hike. Heavy Treasury issuance, fiscal deficits exceeding prior forecasts, and strong corporate borrowing further support higher term premiums. Key upcoming catalysts include the September FOMC meeting, additional Treasury auctions, and any revisions to inflation or labor data that could alter rate-path probabilities.