Add training workflow, datasets, and runbook

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+Trading Implied Volatility
+With a typical option, the sensitivity of delta overshadows that of vega. To
+try and profit from a rise or fall in IV, one has to trade delta neutral to
+eliminate immediate directional sensitivity. There are many strategies that
+can be traded as delta-neutral IV strategies simply by adding stock.
+Throughout this chapter, I will continue using a single option leg with
+stock, since it provides a simple yet practical example. It’s important to note
+that delta-neutral trading does not refer to a specific strategy; it refers to the
+fact that the trader is indifferent to direction. Direction isn’t being traded,
+volatility is.
+Volatility trading is fundamentally different from other types of trading.
+While stocks can rise to infinity or decline to zero, volatility can’t. Implied
+volatility, in some situations, can rise to lofty levels of 100, 200, or even
+higher. But in the long-run, these high levels are not sustainable for most
+stocks. Furthermore, an IV of zero means that the options have no extrinsic
+value at all. Now that we have established that the thresholds of volatility
+are not as high as infinity and not as low as zero, where exactly are they?
+The limits to how high or low IV can go are not lines in the sand. They are
+more like tides that ebb and flow, but normally come up only so far onto the
+beach.
+The volatility of an individual stock tends to trade within a range that can
+be unique to that particular stock. This can be observed by studying a chart
+of recent volatility. When IV deviates from the range, it is typical for it to
+return to the range. This is called reversion to the mean , which was
+discussed in Chapter 3. IV can get stretched in either direction like a rubber
+band but then tends to snap back to its original shape.
+There are many examples of situations where reversion to the mean enters
+into trading. In some, volatility temporarily dips below the typical range,
+and in some, it rises beyond the recent range. One of the most common
+examples is the rush and the crush.