Treasury doubles debt-buyback plan, sends long-term yields lower and boosts stocks

The U.S. Treasury surprised markets by significantly expanding its debt repurchase program, making it a larger buyer of longer-term Treasuries. In response, long-term yields fell (the 30-year yield slipping to about 5.18% from 5.26% and the 10-year easing to roughly 4.63% from 4.68%), while stocks rose on the news. The move, set to begin Sept. 9, is viewed as a tactical step to support rates rather than a debt paydown and could offer short-term relief for rates like mortgages, though analysts warn it may carry unintended consequences and depend on broader policy actions.