[Barclays: U.S. 30-Year Treasury Yield Could Reach 6%] Barclays stated that if the AI investment boom drives a sustained acceleration in U.S. productivity, the 30-year U.S. Treasury yield could reach 6%. Stronger productivity may enable the economy to grow at a faster pace and force the market to raise its long-term expectations for Federal Reserve interest rates, thereby pushing up long-term yields. The 30-year Treasury yield has already risen above 5.61%, the highest since 2002.