2 things I bet.
1. an announcement of money printing under a different name is at hand or some announcement of magnitude pulled out of the lower orifice of the Central Politburo
2. a New Year reversal, bate and switch. An old reliable pattern dies, its reverse is introduced. Remember that they DESTROYED the metals on the 1st or 2nd day of trading last year after a big,big bullish runup in the month of December.