Assume that you bought the three month contract and sold the nine month contract about two months ago. The Wall Street Journal provides a comprehensive list of current and historical prices at online.wsj.com/mdc/page/markets data.html.

Specifically, navigate to the “Commodities & Futures” tab and then the Complete US Index listing. Once you locate the S&P 500 Comp, click on the Chart icon to the left of the contract contained in your strategy. From here you can move your mouse over any day and retrieve the closing price on that day.

Choose a trading date that occurred two months ago and note the price. Find the closing prices for the two contracts that you selected.

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