Add training workflow, datasets, and runbook

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+Chapter 10: The Butterfly Spread 203 
+Note that all of these answers agree with the results that were previously obtained by 
+analyzing the example spread in detail. 
+In this example, the maximum profit potential is $700, the maximum risk is 
+$300, and the investment required is also $300, commissions excluded. In percent­
+age terms, this means that the butterfly spread has a loss limited to about 100% of 
+capital invested and could make profits of nearly 133% in this case. These represent 
+an attractive risk/reward relationship. This is, however, just an example, and two fac­
+tors that exist in the actual marketplace may greatly affect these numbers. First, com­
+missions are large; it is possible that eight commissions might have to be paid to 
+establish and liquidate the spread. Second, depending on the level of premiums to 
+be found in the market at any point in time, it may not be possible to establish a 
+spread for a debit as low as 3 points when the strikes are 10 points apart. 
+SELECTING THE SPREAD 
+Ideally, one would want to establish a butterfly spread at as small of a debit as pos­
+sible in order to limit his risk to a small amount, although that risk is still equal to 
+100% of the dollars invested in the spread. One would also like to have the stock be 
+near the middle striking price to begin with, because he will then be in his maximum 
+profit area if the stock remains relatively unchanged. Unfortunately, it is difficult to 
+satisfy both conditions simultaneously. 
+The smallest-debit butterfly spreads are those in which the stock is some dis­
+tance away from the middle striking price. To see this, note that if the stock were 
+well above the middle strike and all the options were at parity, the net debit would 
+be zero. Although no one would attempt to establish a butterfly spread with parity 
+options because of the risk of early assignment, it may be somewhat useful to try to 
+obtain a small debit by taking an opinion on the underlying stock. For example, if 
+the stock is close to the higher striking price, the debit would be small normally, but 
+the investor would have to be somewhat bearish on the underlying stock in order to 
+maximize his profit; that is, the stock would have to decline in price from the upper 
+striking price to the middle striking price for the maximum profit to be realized. An 
+analogous situation exists when the underlying stock is originally close to the lower 
+striking price. The investor could establish the spread for a small debit in this case 
+also, but he would now have to be somewhat bullish on the underlying stock in order 
+to attempt to realize his maximum profit. 
+Example: XYZ is at 70. One may be able to establish a low-debit butterfly spread 
+with the 50's, 60's, and 70's if the following prices exist: