The Variable Storage Rate (VSR) mechanism in Chicago Board of Trade (CBOT) Wheat futures examines nearby calendar spreads to determine adjustments in maximum contract premium (storage) charges.
December 2012 – March 2013 wheat spread
During the evaluation period of September 19, 2012 through November 23, 2012, the observed December – March calendar spread averaged 46.11% of financial full carry. This will result in the maximum premium charge that a wheat regular delivery facility may charge holders of its outstanding shipping certificates being lowered from 26.5/100s of one cent per bushel per day (approximately 8 cents per bushel per month) to 16.5/100s of one cent per bushel per day (approximately 5 cents per bushel per month) on December 18, 2012.
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