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Evaluating a New Position

If you didn't noticed the color coding used on the Quote Entry View, you sure won't miss it on the Evaluation View. Throughout the program, all Call related values are displayed in shades of green, while all Put related values are illustrated in shades of dark red.

        When a New Position is being considered, the Evaluation View is divided into two distinct areas. The upper portion of the view displays the basic components of the position being evaluated. Both the Stock and Option tickers are displayed along with the number of Shares and Contracts being considered, along with the quotes you just entered on the Quote Entry View. 

The Evaluation Table
        Occupying the better part of the lower portion of the Evaluation View, is a table spanning the probable range the Stock price will be within, at the time any open options expire. The limits of this range are defined by plus or minus the Standard Deviation (STD) of the Stock price as defined by the implied volatility, calculated using the Black/Scholes formula. The table is divided into nine equally sized horizontal rows, and seven vertical columns of varying width.

In the Evaluation View table, you will notice that the plus STD is always larger than the minus STD. This is because the probable distribution of the Stock price is defined as a lognormal distribution. That is, there is a limit of zero on the downside, while the upside is unlimited. For more on the mathematics of option pricing, see "Options as a Strategic Investment" by Lawrence McMillan.


        Just to the right of the 'Action at Expiration' heading are two command buttons. The default setting for the upper most button is 'Call Away Stock', which describes the action at closing if the Stock price is higher than the Call strike at expiration. When this button is clicked, the label and the action at expiration will change to - 'Buy Back Calls', the alternative to letting the Stock be called away when the Stock price is higher than the Call strike price. The lower of the two buttons displays the label 'Sell Puts' as a default. All the calculations are based on any in the money Puts being sold just prior to expiration. Clicking this command button will change the label and the closing strategy to 'Exercise Puts' - all in the money Puts will be used to buy the underlying Stock at the Put strike price. Clicking either of these buttons will recalculated all the values displayed in the Evaluation table to reflect the change in the closing strategy and subsequent changes in the closing cost. 

        Returning to the upper right hand portion of the Evaluation View, as shown below, you will see five of a maximum six command buttons displayed. Each of these buttons represents one of the combination of expiration dates and strike prices that were selected from the Initial View and subsequently quoted on the Quote Entry View. The label of each button has an abbreviated description corresponding to the expiration date and strike price of the options being considered in that particular position. Clicking any of these buttons will display the results of the calculations related to that position. The label of the button representing the position currently being displayed will appear in bold font.

The Evaluation View Graph
        Also displayed near the upper right hand corner of the Evaluation View are two command buttons. The first is labeled 'Graph' - when clicked, a separate form will open to display a graphic representation of the option strategy being considered on the Evaluation View:

   
     The values graphed on the Evaluation Graph are taken directly from the Evaluation View table, only the manner of presentation is different. The values displayed at the ends of the double headed arrows, just beneath the graph, are the statistical probability of the Stock being above or below the value the arrow is centered on. For instance, the statistical probability of the Stock price being at or above the Call strike of 40 is 52.4%, and 47.6% of being beneath the 40 strike at expiration. While the chances of being at or above the Break Even point of 39.59 is 61.4%, with a 38.6% probability that the Stock price will be beneath the Break Even price at option expiration.

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Copyright © 2002 - 09 Mark Hutchinson mhutchinson10@tampabay.rr.com