The CME Group is so full of $hit it's not even funny.CME Statement Says Flash Crash Not Caused by Futures
They should be investigated instead of Nav.
They know damn well about all of the spoofing and yet they do not modify their order and matching engine to reduce or eliminate it ?
Terrible. This is what happens when you get too big.
If I were the CFTC, I would move to split-up the CME Group to encourage more competition.

. all links in the public domain.