Why does one pricing relation give gold, gasoline and stock-index futures different prices, and what did a broken one reveal in October 1987?
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The cost-of-carry relation at an arbitrary date
Write and its present-value form, and record which costs and benefits enter for commodities versus financials.
Commodity futures: gold and gasoline
Write for gold and for gasoline, define and , and record which carry terms each commodity has.
Stock index futures
Record that index futures are cash settled, write the formula with dividend yield , and work one example computing the futures price from a spot level and a three-month rate.
Violations as arbitrage or market dislocation
State what a violation of the relation signals, and record the two episodes: gasoline storage after Hurricane Katrina in 2005, and the futures-spot gap on the morning of October 19, 1987.