`All-or-None’ Deals Limited to Options On CME, CBOT as of July 6

Beginning July 6, CME and CBOT market participants seeking to execute “all-or-none” trades will be limited to certain enumerated options contracts.

In a June 8 market regulation advisory notice, CME Group said the change is intended to coincide with the July 2 closing of nearly all open outcry futures trading on the exchange. The S&P 500 still will be traded via open outcry.

An all-or-none order must meet or exceed an exchange-specified minimum quantity; they can be executed only for their entire quantity and at a single price. All-or none trades have been permitted in certain products, but must be ...