U.S. stock markets showed a strong rally as the Treasury Department announced a surprise plan to double its debt buybacks, aiming to ease the ongoing stress in the bond market. Following this intervention, stock indices including the Dow surged, while bond yields experienced a significant decline, offering relief after days of upward pressure. Global bonds also responded positively, mirroring the support for U.S. Treasury securities. Analysts note this move could stabilize the long-term bond market amid inflation concerns, suggesting a favorable outlook in the near term for both stocks and bonds.