Add training workflow, datasets, and runbook

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+CHAPTER 31 
+Index Spreading 
+In this chapter, we will look at strategies oriented toward spreading one index against 
+another. This may be done with either futures or options. In some cases, this is almost 
+an arbitrage because the indices track each other quite well. In others, it is a high­
+risk venture because the indices bear little relationship to each other. In any case, if 
+the futures relationship between the two indices is out of line, one may have an extra 
+advantage. 
+INTER-INDEX SPREADING 
+There are general relationships between many stock indices, both in the United 
+States and worldwide. The idea behind inter-index spreading is often to capitalize on 
+one's view of the relationships between the two indices without having to actually 
+predict the direction of the stock market. Note that this is often the philosophy 
+behind many option spreads as well. 
+Sometimes an analyst will say that he expects small-cap stocks to outperform 
+large-cap stocks. This analyst should consider using an inter-index spread between 
+the S&P 500 Index and the Value Line Index (which contains many small stocks), or 
+perhaps between the S&P and a NASDAQ-based index. If he buys the index that is 
+comprised of smaller stocks and sells the S&P 500 Index, he will make money if his 
+analysis is right, regardless of whether the stock market goes up or down. All he wants 
+is for the index he is long to outperform the index he is short. 
+Occasionally, the futures or options on these indices are mispriced in compar­
+ison to the way the indices are priced. When this happens, one may be able to cap­
+italize on the pricing discrepancy. At times, the spread between the index products 
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