This paper presents a new model of the term structure of interest rates that is
based on the continuous Ho–Lee one. In this model, we suggest that the drift and volatility
coefficients depend additionally on a generalized inverse Gaussian (GIG) distribution.
Analytical expressions for the bond price and its moments are found in the new GIG
continuous Ho–Lee model. Also, we compute in this model the prices of European call and
put options written on bond. The obtained formulas are determined by the values of the
Humbert confluent hypergeometric function of two variables. A numerical experiment
shows that the third and fourth moments of the bond prices differentiate substantially in
the continuous Ho–Lee and GIG continuous Ho–Lee models.