FED Faiz Artırımı Ve Getiri Eğrisinin Eğimi

it seems that when the Federal funds rate increases, there's a similar increase in the interest rate on short term bonds. This is likely  due to Federal funds and short term bonds being close substitutes, especially for banks. ‎In contrast the interest rate on long term bonds (and other long term credit instruments like mortgages) do not seem to respond much to changes in the Federal Funds rate. Thus, when the Federal Funds rate goes up,  the difference between short and long term interest rates decreases.