The automatic adjustment ratio in CBOT Soybean Oil futures is calculated on a weekly basis from January 1st to August 31st. The ratios are calculated for each delivery territory, and are entered into a formula that is used to determine whether location delivery differentials are adjusted beginning in January of the following year. The automatic adjustment mechanism formula is described in the contract specifications for the Soybean Oil futures contracts in CBOT Rulebook chapter 12, which is published on the Exchange's web site at: http://www.cmegroup.com/rulebook/CBOT/index.html.
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