US bond yields sharply reversed their gains in after-hours trading, as investors closely monitor developments in the situation with Iran.

On Tuesday, in the last hour of trading in New York, the yield on the 10-year U.S. Treasury bond rose by 1.79 basis points to 4.3359%. After 00:50 Beijing time, there was a short-term rally followed by a rapid drop from 4.4036% to almost flat, close to 4.34% by 04:18 Beijing time. The yield on the 2-year U.S. bond rose by 3.68 basis points to 3.8887%, and after the U.S. stock market closed, it quickly dropped from 3.94% to nearly flat, close to 3.84%; the yield on the 30-year U.S. bond rose by 1.43 basis points to 4.9274%. The spread between 2-year and 10-year U.S. bond yields fell by 2.513 basis points to +46.072 basis points. The yield on the 10-year inflation-protected U.S. Treasury bond rose by 4.09 basis points to 2.0435%, and after the U.S. stock market closed, it dropped from 2.08% to 2.02%; the yield on the 2-year TIPS rose by 3.33 basis points to 0.6955%, and briefly dropped from 0.7105% to 0.6355%; the yield on the 30-year TIPS rose by 3.69 basis points to 2.7350%.