“The U.S. economy keeps powering through inflation, tariffs and higher borrowing costs, defying a run-up in Treasury yields and a Fed rate increase. That has the bond market spooked,” the Wall Street Journal reports.“The usual economic brakes aren’t slowing growth, hiring or an AI investment boom that looks to be unstoppable. To some, AI’s potential returns seem so bright that even steep interest rates won’t slow down tech companies’ investments.”