U.S. Treasury yields were broadly unchanged early Tuesday as investors awaited July’s personal consumption expenditures (PCE) reading, the Federal Reserve’s preferred inflation gauge, and a second-quarter GDP estimate due Wednesday at 8:30 a.m. ET. The 10-year Treasury yield, a benchmark for mortgages, auto loans and credit-card debt, was 4.647% at 4 a.m. ET. The 30-year yield was 5.181% and the two-year yield was 4.199%. Oil prices extended declines, with Brent crude down 2.8% to $86.08 a barrel and West Texas Intermediate down 3% to $79.93, amid reports that Iran and Oman were nearing an agreement to secure safe passage through the Strait of Hormuz. Markets are also watching developments in the Middle East and the Federal Reserve’s Jackson Hole Economic Policy Symposium, which begins Thursday; Federal Reserve Chairman Kevin Warsh is scheduled to speak Friday.