Semi-elasticity
A semi-elasticity (or semielasticity) gives the percentage change in f(x) in terms of a change (not percentage-wise) of x. Algebraically, the semi-elasticity S of a function f at point x is
An example of semi-elasticity is modified duration in bond trading.
The term "semi-elasticity" is also sometimes used for the change if f(x) in terms of a percentage change in x which would be
Read more about this topic: Elasticity Of A Function