Type: float
The rate of change in the price of a derivative with respect to the movement in the price of the underlying instrument(s) upon which the derivative instrument price is based.
This value is normally between -1.0 and 1.0.
Added in protocol FIX.4.4
See in: FIX.4.4, FIX.5.0, FIX.5.0SP1, FIX.5.0SP2.