The CME has reduced margins on a variety of instruments, including crude oil and gold futures. http://www.cmegroup.com/tools-information/lookups/advisories/clearing/files/Chadv12-221.pdf
CME just announced another round of margarine hikes on gasoline and crack head spreads. TTL after the close tomorrow.
Initial increases were effective after the close yesterday and we saw what happened.
http://www.cmegroup.com/tools-information/look…