Add training workflow, datasets, and runbook

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+Understanding and Managing Leverage    • 185
+Berkshire Hathaway (BRK.A). In a recent academic paper written by re-
+searchers at AQR Capital titled, “Buffett’s Alpha, ”4 the researchers found 
+that a significant proportion of Buffett’s legendary returns can be attributed 
+to finding firms that have low valuation risk and investing in them using a 
+leverage ratio of roughly 1.8. The leverage comes from the float from his in-
+surance companies (the monies paid in premium by clients over and above 
+that required to pay out claims). As individual investors, we do not have a 
+captive insurance company from which we can receive continual float, but 
+by buying options and using leverage prudently, it is possible to invest in a 
+manner similar to a master investor.
+In this section, we have only discussed leverage considerations when 
+we gain exposure by buying options. There is a good reason to ignore the 
+case where we are accepting exposure by selling options that we will dis-
+cuss when we talk about margining in Chapter 10. We now continue with 
+chapters on gaining, accepting, and mixing exposure. In these chapters, we 
+will use all of what we have learned about option pricing, valuation, and 
+leverage to discuss practical option investment strategies.