Click on 2012 and you can check any open day in December. The very top line on the first page has the futures prices. On 12-14-12 the Dec 13 was $6.28.
Basis has been around $0.30 here at the E plants. By using some H2A contracts a guy could have had almost $6 cash by the end of the month. Oh hindsight anyhow.
need link of dec13 futures were in dec12
