Quote from TraDaToR:
First,there are multiple grain producers , trading at different times in the futures market. One producer doesn't necessarily sell all his wheat at one expiry and doesn't necessarily sell everything based on a forward contract.It's a market ... Multiple parties trading at multiple times for multiple reasons...
Okay, say we have grain producers A, B, and C. They are looking to make contracts for December 2013 Wheat for a certain portion of their grain.
A sets his contract at $5 per bushel, B at $6, and C at $7. So, the average price between the producers is $6 per bushel.
Is that more realistic? Or would a single grain producer set hundreds or thousands of contracts at various prices for the December '13 contract? Even so, one could average those prices and still arrive at the "Average Contract Expiration Price". Wouldn't such a price be immensely useful, especially as the expiration date of a contract approaches?
Anyway, I'll get back to reading that book Lornz mentioned. If I find the answer to these questions, I'll write it up.