Add training workflow, datasets, and runbook

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+224  •   The Intelligent Option Investor
+For instance, here are data from ATM and OTM call options on IBM 
+(IBM) expiring in 80 days. I took these data when IBM’s shares were trad-
+ing at $196.80 per share.
+Sell a Call at 195
+Cover at ($) Net Premium Received ($) Percent Return Capital at Risk ($)
+200 2.40 48 5
+205 4.26 43 10
+210 5.47 36 15
+215 6.17 31 20
+220 6.51 26 25
+225 6.70 22 30
+230 6.91 20 35
+235 6.90 17 40
+240 6.96 15 45
+In this table, net premium received was calculated by selling at the $195 
+strike’s bid price and buying at each of the listed strike price’s ask prices. Percent 
+return is the proportion of net premium received as a percentage of the capital 
+at risk—the width of the spread. This table clearly shows that accepting expo-
+sure with a call spread is a levered strategy. The potential return on a percent-
+age basis can be raised simply by lowering the amount of capital at risk.
+However, although accepting exposure with a call spread is un-
+deniably levered from this perspective, there is one large difference: un-
+like the leverage discussed earlier in this book for a purchase of call op-
+tions—in which your returns were potentially unlimited—the short-call 
+spread investor receives premium up front that represents the maximum 
+return possible on the investment. As such, in the sense of the investor’s 
+potential gains being limited, the short-call spread position appears to be 
+an unlevered investment.
+Considering the dual nature of a short-call spread, it is most help-
+ful to think about managing these positions using a two-step process with 
+both tactical and strategic aspects. We will investigate the tactical aspect 
+of leverage in the remainder of this section and the strategic aspect in the 
+portfolio management section.