On August 13th, the CFTC sent a letter to CME Group, Inc. regarding a Chicago Board of Trade self-certified Market Regulation Advisory Notice issued on October 19, 2009. In that notice, CBOT stated that its rules do not permit the execution of exchange of futures for futures transactions. The notice was issued shortly after the CFTC approved an ELX Futures rule authorizing participants on ELX to carry out EFF transactions. The CFTC has reviewed the matter and has found that ELX's EFF transactions are not wash sales and are consistent with Commission precedent. The Commission also has directed staff to separately analyze whether CBOT's October 19, 2009 notice was consistent with the requirements of CEA Core Principle 18 (antitrust considerations). CFTC Release No. PR-5872-10.