On August 17, 2026, U.S. stocks declined while oil prices increased more than 2% and the 30-year Treasury yield hit 5.31%, its highest level since June 2007. Reports attribute these movements to the ongoing U.S.-Iran conflict, an expiring ceasefire, and stalled talks over the Strait of Hormuz. Analysts cited reduced risk-taking as a direct result of elevated energy and borrowing costs.