Clarification to Block Minimum Threshold Adjustments

On June 25, CME Group announced via SER 8601 the intention to allow exceptions to block trade minimum thresholds for US-based Wheat and Corn products, when they are traded as a spread against Black Sea and Australian Wheat and Corn products. The pre-existing block trade minimums and reporting windows, which apply whether traded as a spread or an outright, are as follows:

Product Name (CME ClearPort Code) RTH Block Threshold ETH Block Threshold Reporting Window (minutes)
Chicago SRW Wheat futures (W) 200 100 5
Chicago SRW Wheat options (W) 300 150 15
KC HRW Wheat futures (KW) 100 50 5
KC HRW Wheat options (KW) 150 75 15
Corn futures (C) 300 150 5
Corn options (C) 500 250 15
Black Sea Wheat Financially Settled (Platts) futures (BWF) 5 5 15
Black Sea Wheat Financially Settled (Platts) options (BWO) 5 5 15
Black Sea Corn Financially Settled (Platts) futures (BCF) 5 5 15
Black Sea Wheat Financially Settled (Platts) options (BWO) 5 5 15
Australian Wheat FOB (Platts)

 

futures (AUW)

5 5 15

As of July 12, 2020, for trade date July 13, the following may be traded with reduced block thresholds on the US-based Wheat and Corn legs of the trade, and in some cases, longer reporting windows when traded as a spread and in this specific ratio.  Whole multiples of this ratio will also be accepted, but no other deviations in quantity that do not meet the block thresholds in both outrights as defined above will be accepted.

CBOT Leg 1 (CME ClearPort Code) Minimum Quantity CBOT Leg 2 (CME ClearPort Code) Minimum Quantity Reporting Window (minutes)
Black Sea Wheat Financially Settled (Platts) futures (BWF) 100 KC HRW Wheat futures (KW) 40 15
Black Sea Wheat Financially Settled (Platts) futures (BWF) 100 Chicago SRW Wheat futures (W) 40 15
Australian Wheat FOB (Platts)

 

futures (AUW)

100 KC HRW Wheat futures (KW) 40 15
Australian Wheat FOB (Platts)

 

futures (AUW)

100 Chicago SRW Wheat futures (W) 40 15
Black Sea Corn Financially Settled (Platts) futures (BCF) 100 Corn futures (C) 40 15
Black Sea Wheat Financially Settled (Platts) options (BWO) 100 KC HRW Wheat options (KW) 40 15
Black Sea Wheat Financially Settled (Platts) options (BWO) 100 Chicago SRW Wheat options (W) 40 15
Black Sea Corn Financially Settled (Platts) options (BSO) 100 Corn options (C) 40 15

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