excerpts from CME links provided by OP
Block trade prices are reported independently of transaction prices in the regular market and are not
included as part of the daily trading range. Block trade prices do not elect conditional orders (e.g. stop
orders) or otherwise affect orders in the regular market.
Block trades must be reported to the Globex Control Center (âGCCâ) by the seller within five minutes of
the transaction. The seller reports the trade by calling the Globex Control Center (âGCCâ) at
312.456.2391. When the GCC is closed â for example, during the weekend â the block trade must be
reported no later than five minutes prior to the opening of the next electronic trading session.
The date, execution time, contract details, price and quantity of block trades are reported upon receipt of
the block information by GCC. Block trade information is reported on the MerQuote system and may be
accessed by entering the code âBLKâ. The information will also be displayed on cmegroup.com at the
following link:
http://www.cmegroup.com/tools-information/blocktrades.html
Block trade information is also displayed on the trading floor.
Block trade prices are published separately from transactions in the regular market.
Block trade volume by contract is detailed in the daily volume reports published by the Exchange.
The CBOT prohibition on pre-execution communications and prearranged trading detailed in
Rule 539 specifically states that these restrictions do not apply to block trades.
Beginning March 3, 2008 CME Group will reduce the minimum tick size for three of its most actively traded U.S.
Treasury contracts. Pending CFTC approval, the following modifications will be made:
⢠30-Year U.S. Treasury Bond futures from 1/32nd to 1/2 of 1/32nd (from $31.25 to $15.625)
⢠5-Year U.S. Treasury Note futures from 1/2 of 1/32nd to 1/4 of 1/32nd (from $15.625 to $7.8125)
⢠5-Year U.S. Treasury Note options from 1/64th to 1/2 of 1/64th from ($15.625 to $7.8125)
Additionally, CBOT Directors have approved the use of block transactions for CBOT Interest Rate products. The
minimum order size requirements during regular trading hours (RTH) will vary by product and order type