A put option's value for a nonlinear black-scholes equation

Abstract

We study a nonlinear Black-Scholes partial differential equation for modelling illiquid markets with feedback effects. After reducing the equation into a second-order nonlinear partial differential equation, we find that the assumption of a traveling wave profile to the second-order equation reduces it further to ordinary differential equations. Solutions to all these transformed equations facilitate an analytic solution to the nonlinear Black-Scholes equation. Use of the put-call parity gave rise to the put option’s current value. These solutions can be used for pricing a European call and put options respectively at t ≥ 0 and when c 6= r.