18.5 2. Tree Parameters for a Nondividend paying stock (Equations 18.4 to 18.7) When St is small, a solution to the equations is st G√St r ot Options, Futures, and Other Derivatives, 5th edition C 2002 by John C Hull18.5 Options, Futures, and Other Derivatives, 5th edition © 2002 by John C. Hull 2. Tree Parameters for a Nondividend Paying Stock (Equations 18.4 to 18.7) When dt is small, a solution to the equations is r t t t a e u d a d p d e u e d −s d s d = − − = = =