What Do They Know? CME Implements Gold, Precious Metals Circuit Breakers Up To $400 Wide

With memorandum S-7258, titled "Implementation of New NYMEX/COMEX Rule Regarding Special Price Fluctuation Limits for Certain NYMEX and COMEX Metals Futures and Options Contracts" released moments ago by the CME Group, and set to become effective on December 21, 2014, and which seeks a 5 minute trading halt when "price movements in lead-month primary futures contracts result in triggering events"... "as a measure that is consistent with promoting price discovery and cash-futures price convergence" in order to "deter sharp price movements that may, for example, be driven by illiquid central limit order books prevailing from time to time in otherwise liquid markets", one wonders why now, and what does the CME know about upcoming volatility, or lack of liquidity, in the precious metals space that nobody else does (and does any of this have to do with the "berserk" algo test from November 25?)?

What Do They Know? CME Implements Gold, Precious Metals Circuit Breakers Up To $400 Wide

CME New Price Fluctuation Rules