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Option
Model Assumptions
The screenshot below illustrates the assumptions input on the 'Option Assumptions' sheet. The BlackScholes model takes the following data points as inputs:
This sheet also includes bookkeeping entries to organize and manage multiple grants. The following information is tracked for each grant:
Help text is available for the inputs with the buttons marked with . The volatility help window is shown in the below screenshot. The 'Calculate' button takes the assumptions and uses the defined BlackScholes formulas to create a valuation. The first step in the calculation is to test the inputs for invalid data. If any inputs are out of range, an error message indicates what input is incorrect and the accepted range for that assumption. If all of the inputs are within the correct range, the model is computed and the 'Model Results' sheet becomes active. The 'Model Result' sheet shows the results of the calculation. 
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