Add training workflow, datasets, and runbook

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+Chpt,r 31: Index Spreading 581 
+J!"<>r example, if one index sells for twice the price of the other, and if both indices 
+have similar volatilities, then a one-to-one spread gives too much weight to the 
+higher-priced index. A two-to-one ratio would be better, for that would give equal 
+weighting to the spread between the indices. 
+Example: UVX is an index of stock prices that is currently priced at 100.00. ZYX, 
+another index, is priced at 200.00. The two indices have some similarities and, there­
+fore, a spreader might want to trade one against the other. They also display similar 
+volatilities. 
+If one were to buy one UVX future and sell one ZYX future, his spread would 
+be too heavily oriented to ZYX price movement. The following table displays that, 
+showing that if both indices have similar percentage movements, the profit of the 
+one-by-one spread is dominated by the profit or loss in the ZYX future. Assume both 
+fi1tures are worth $500 per point. 
+Market ZYX ZYX uvx uvx Total 
+Direction Price Profit Price Profit Profit 
+up 20% 240 -$20,000 120 +$10,000 -$10,000 
+up 10% 220 - 10,000 110 + 5,000 - 5,000 
+down 10% 180 + 10,000 90 - 5,000 + 5,000 
+down 20% 160 + 20,000 80 - 10,000 + 10,000 
+This is not much of a hedge. If one wanted a position that reflected the movement 
+of the ZYX index, he could merely trade the ZYX futures and not bother with a 
+spread. 
+If, however, one had used the ratio of the indices to decide how many futures 
+to buy and sell, he would have a more neutral position. In this example, he would buy 
+two UVX futures and sell one ZYX future. 
+Proponents of using the ratio of indices are attempting strictly to capture any 
+performance difference between the two indices. They are not trying to predict the 
+overall direction of the stock market. 
+Technically, the proper ratio should also include the volatility of the two indices, 
+because that is also a factor in determining how fast they move in relationship to each 
+other.