The flat yield curve refers to a specific shape of the yield curve, which represents the relationship between the interest rates (yields) and the maturities of bonds with the same credit quality. In a flat yield curve, there is minimal difference between the yields of short-term and long-term bonds.
This flattening of the yield curve typically occurs during transitional periods between normal and inverted yield curves. It differs from a normal yield curve, which slopes upward, indicating that longer-term bonds have higher yields compared to shorter-term ones. A flat yield curve may signal uncertainty in the financial markets or expectations of changes in interest rates, making it an important indicator for investors and economists in assessing the economic and interest rate environment.