OpPrice 1.2 - OpPrice is an option valuation program for the Newton MessagePad. OpPrice is powerful, yet easy to use. Just enter the five variables that determine an option's theoretical value (price, strike price, volatility, time remaining, and short term interest rate) and tap the "Calc" button. The option's values (price, delta, gamma, vega and theta) will be displayed for calls (and puts in the registered version).