What is the meaning of Long bond?

Long bond is the long bond is the 30-year bond issued by the US Treasury. The yield, or what you earn, on a long-term bond is usually higher than the yield on shorter-term bonds. That's because the long bonds have to pay higher interest rates to attract investors who are willing to tie up their money for an extended period of time. The yield on the long bond is considered a benchmark, or key indicator, of long-term interest rates.