Q. Yield curve - influence the rate of interest?
The normal yield curve demonstrates that the yield required on debt increases in line with the term to maturity. One reason for this is to facilitate loan providers requires compensation for deferring their use of the cash they have lent and the longer the period for which they are deprived of their cash the more compensation they require. This is explaining as the liquidity preference explanation for the shape of the normal yield curve.
Other explanations for the form of the normal yield curve are expectations theory and market segmentation theory. Expectations theory proposes that interest rates rise with maturity because rates of interest are expected to rise in the future for example due to an expected increase in inflation. Market segmentation theory proposes that the market for long-term debt differs from the market for short-term debt.