When the cost of American borrowing crossed 5% on Monday for the first time in nearly three years, it was not merely a number changing on a screen — it was the world's financial nervous system registering the weight of distant conflict. Houthi drone strikes on Saudi oil infrastructure sent crude prices surging past $108 a barrel, reminding markets that energy and money are never truly separate from the politics of geography and war. The yield on the 10-year Treasury, that quiet benchmark shaping the cost of homes and governments alike, climbed as traders priced in the oldest of economic anxiet