Effective on trade date Tuesday, September 6, 2011, the Exchange Rules governing box spreads for options on S&P 500 futures will allow trades in half ticks, or 0.05 increments. These contracts are listed by and subject to the rules of CME.
CME Group is the world's leading and most diverse derivatives marketplace. The company is comprised of four Designated Contract Markets (DCMs). Further information on each exchange's rules and product listings can be found by clicking on the links to CME, CBOT, NYMEX and COMEX.