As chief executive of Elon Musk's X, Linda Yaccarino navigated two turbulent years of charm offensives and legal threats to stabilize a bruised business-just in time for Musk's merger of X with xAI.

Prices of Treasury debt have settled lower each trading day in July, marking the longest streak of rising yields since mid May, according to the Dow Jones Market Data team. How Trump's threat of 50% ...