A Rebuy ? for Math Majors

[BPA234]

Please understand, this is not about a specific rebuy scenario or a strategy request. Simply a request to see if there is a way to input some relevant data into a model that will produce a result that can be used to guide decisions on investment that yield over an annual period.

Since the factors can be expressed numerically, and since this is about results over time, I know this is possible. I just do not know how to write the math.