We have noted the incessant slamdown  in the precious metals markets, and highlighted that the only thing that can slow the flood of liquidity into each and every market is a rise in energy prices . The former represents 'trust' in the system; the latter represents 'real economics' as it squeezes the global economy forcing the central banks to pull back or tighten (see China's lack of rev repo recently). To wit, we just noted the plunge in WTI this morning; but Nanex , given their depth of data, noticed something considerably more concerning... "Because the circuit breaker tripped after the market had somewhat stabilized, we think another large sale appeared that would have decimated prices - which CME's circuit breaker logic picked up on, causing the halt." Did someone intentionally try to crash the WTI Crude contract? And if so, who? We don't know, but the usual suspect (singular) does emerge, considering that with gas prices hitting new February daily record every day, and every dollar in increase in WTI means even less (seasonally adjusted) GDP, and less consumer purchasing power, those evil speculators who are taking the Fed's free money to buy commodities (and very unpatriotically not the S&P or Russell 2000) must be promptly punished.
Via Nanex, 
On February 20, 2013 at 11:01:36, the April 2013 crude oil futures contract was hit with over 2500 contracts within 2 seconds sending prices sharply lower. Oddly enough, 12 seconds later, all CME oil futures contracts halted for 10 seconds. Because the circuit breaker tripped after the market had somewhat stabilized, we think another large sale appeared that would have decimated prices - which CME's circuit breaker logic picked up on, causing the halt. This large ghost sale must have been canceled before the 10 second halt ended. Another explanation is a software bug in CME's circuit breaker code, which we doubt because they have had great success with their circuit breaker logic.